[U-Boot] [PATCH v3] regulator: pbias: Add PBIAS regulator for proper voltage switching on MMC1
In the TI SOCs a PBIAS cell exists to provide a bias voltage to the MMC1 IO cells. Without this bias voltage these I/O cells can not function properly. The PBIAS cell is controlled by software.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Tom Rini trini@konsulko.com Reviewed-by: Simon Glass sjg@chromium.org ---
Hi Jaehoon,
Here is the patch for the PBIAS regulator. I modified the KConfig to select the REGMAP and SYSCON features as you suggested. Thanks. JJ
changes since v2: - automatically select REGMAP and SYSCON if PBIAS is selected.
changes since v1: - automatically select the PBIAS driver if DM_REGULATOR, DM_MMC and MMC_OMAP_HS are set - use the dev_read_*() API to access the DT
drivers/mmc/Kconfig | 1 + drivers/power/regulator/Kconfig | 13 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/pbias_regulator.c | 302 ++++++++++++++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 drivers/power/regulator/pbias_regulator.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 588e118..63e1122 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -158,6 +158,7 @@ config MMC_PCI config MMC_OMAP_HS bool "TI OMAP High Speed Multimedia Card Interface support" select DM_MMC_OPS if DM_MMC + select DM_REGULATOR_PBIAS if DM_MMC && DM_REGULATOR help This selects the TI OMAP High Speed Multimedia card Interface. If you have an omap2plus board with a Multimedia Card slot, diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index f213487..cb5ea08 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -142,6 +142,19 @@ config DM_REGULATOR_PALMAS features for REGULATOR PALMAS and the family of PALMAS PMICs. The driver implements get/set api for: value and enable.
+config DM_REGULATOR_PBIAS + bool "Enable driver for PBIAS regulator" + depends on DM_REGULATOR + select REGMAP + select SYSCON + ---help--- + This enables implementation of driver-model regulator uclass + features for pseudo-regulator PBIAS found in the OMAP SOCs. + This pseudo-regulator is used to provide a BIAS voltage to MMC1 + signal pads and must be configured properly during a voltage switch. + Voltage switching is required by some operating modes of SDcards and + eMMC. + config DM_REGULATOR_LP873X bool "Enable driver for LP873X PMIC regulators" depends on PMIC_LP873X diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index ce14d08..75d611a 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -17,5 +17,6 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_PBIAS) += pbias_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o diff --git a/drivers/power/regulator/pbias_regulator.c b/drivers/power/regulator/pbias_regulator.c new file mode 100644 index 0000000..303eca9 --- /dev/null +++ b/drivers/power/regulator/pbias_regulator.c @@ -0,0 +1,302 @@ +/* + * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com> + * Jean-Jacques Hiblot jjhiblot@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> +#include <dm.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <regmap.h> +#include <syscon.h> +#include <linux/bitops.h> +#include <linux/ioport.h> +#include <dm/read.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct pbias_reg_info { + u32 enable; + u32 enable_mask; + u32 disable_val; + u32 vmode; + unsigned int enable_time; + char *name; +}; + +struct pbias_priv { + struct regmap *regmap; + int offset; +}; + +static const struct pmic_child_info pmic_children_info[] = { + { .prefix = "pbias", .driver = "pbias_regulator"}, + { }, +}; + +static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff, + int len) +{ + struct pbias_priv *priv = dev_get_priv(dev); + uint32_t val = *(uint32_t *)buff; + + if (len != 4) + return -EINVAL; + + return regmap_write(priv->regmap, priv->offset, val); +} + +static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{ + struct pbias_priv *priv = dev_get_priv(dev); + + if (len != 4) + return -EINVAL; + + return regmap_read(priv->regmap, priv->offset, (uint32_t *)buff); +} + +static int pbias_ofdata_to_platdata(struct udevice *dev) +{ + struct pbias_priv *priv = dev_get_priv(dev); + struct udevice *syscon; + struct regmap *regmap; + struct resource res; + int err; + + err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, + "syscon", &syscon); + if (err) { + error("%s: unable to find syscon device (%d)\n", __func__, + err); + return err; + } + + regmap = syscon_get_regmap(syscon); + if (IS_ERR(regmap)) { + error("%s: unable to find regmap (%ld)\n", __func__, + PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + priv->regmap = regmap; + + err = dev_read_resource(dev, 0, &res); + if (err) { + error("%s: unable to find offset (%d)\n", __func__, err); + return err; + } + priv->offset = res.start; + + return 0; +} + +static int pbias_bind(struct udevice *dev) +{ + int children; + + children = pmic_bind_children(dev, dev->node, pmic_children_info); + if (!children) + debug("%s: %s - no child found\n", __func__, dev->name); + + return 0; +} + +static struct dm_pmic_ops pbias_ops = { + .read = pbias_read, + .write = pbias_write, +}; + +static const struct udevice_id pbias_ids[] = { + { .compatible = "ti,pbias-dra7" }, + { } +}; + +U_BOOT_DRIVER(pbias_pmic) = { + .name = "pbias_pmic", + .id = UCLASS_PMIC, + .of_match = pbias_ids, + .bind = pbias_bind, + .ops = &pbias_ops, + .ofdata_to_platdata = pbias_ofdata_to_platdata, + .priv_auto_alloc_size = sizeof(struct pbias_priv), +}; + +static const struct pbias_reg_info pbias_mmc_omap2430 = { + .enable = BIT(1), + .enable_mask = BIT(1), + .vmode = BIT(0), + .disable_val = 0, + .enable_time = 100, + .name = "pbias_mmc_omap2430" +}; + +static const struct pbias_reg_info pbias_sim_omap3 = { + .enable = BIT(9), + .enable_mask = BIT(9), + .vmode = BIT(8), + .enable_time = 100, + .name = "pbias_sim_omap3" +}; + +static const struct pbias_reg_info pbias_mmc_omap4 = { + .enable = BIT(26) | BIT(22), + .enable_mask = BIT(26) | BIT(25) | BIT(22), + .disable_val = BIT(25), + .vmode = BIT(21), + .enable_time = 100, + .name = "pbias_mmc_omap4" +}; + +static const struct pbias_reg_info pbias_mmc_omap5 = { + .enable = BIT(27) | BIT(26), + .enable_mask = BIT(27) | BIT(25) | BIT(26), + .disable_val = BIT(25), + .vmode = BIT(21), + .enable_time = 100, + .name = "pbias_mmc_omap5" +}; + +static const struct pbias_reg_info *pbias_reg_infos[] = { + &pbias_mmc_omap5, + &pbias_mmc_omap4, + &pbias_sim_omap3, + &pbias_mmc_omap2430, + NULL +}; + + +static int pbias_regulator_probe(struct udevice *dev) +{ + const struct pbias_reg_info **p = pbias_reg_infos; + struct dm_regulator_uclass_platdata *uc_pdata; + + uc_pdata = dev_get_uclass_platdata(dev); + + + while (*p) { + int rc; + rc = dev_read_stringlist_search(dev, "regulator-name", + (*p)->name); + if (rc >= 0) { + debug("found regulator %s\n", (*p)->name); + break; + } else if (rc != -ENODATA) { + return rc; + } + p++; + } + if (!*p) { + int i = 0; + const char *s; + + debug("regulator "); + while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0) + debug("%s'%s' ", (i > 1) ? ", " : "", s); + debug("%s not supported\n", (i > 2) ? "are" : "is"); + return -EINVAL; + } + + uc_pdata->type = REGULATOR_TYPE_OTHER; + dev->priv = (void *)*p; + + return 0; +} + +static int pbias_regulator_get_value(struct udevice *dev) +{ + const struct pbias_reg_info *p = dev_get_priv(dev); + int rc; + uint32_t reg; + + rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg)); + if (rc) + return rc; + + debug("%s voltage id %s\n", p->name, + (reg & p->vmode) ? "3.0v" : "1.8v"); + return (reg & p->vmode) ? 3000000 : 1800000; +} + +static int pbias_regulator_set_value(struct udevice *dev, int uV) +{ + const struct pbias_reg_info *p = dev_get_priv(dev); + int rc; + uint32_t reg; + + debug("Setting %s voltage to %s\n", p->name, + (reg & p->vmode) ? "3.0v" : "1.8v"); + + rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg)); + if (rc) + return rc; + + if (uV == 3000000) + reg |= p->vmode; + else if (uV == 1800000) + reg &= ~p->vmode; + else + return -EINVAL; + + return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg)); +} + +static int pbias_regulator_get_enable(struct udevice *dev) +{ + const struct pbias_reg_info *p = dev_get_priv(dev); + int rc; + uint32_t reg; + + rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg)); + if (rc) + return rc; + + debug("%s id %s\n", p->name, + (reg & p->enable_mask) == (p->disable_val) ? "on" : "off"); + + return (reg & p->enable_mask) == (p->disable_val); +} + +static int pbias_regulator_set_enable(struct udevice *dev, bool enable) +{ + const struct pbias_reg_info *p = dev_get_priv(dev); + int rc; + uint32_t reg; + + debug("Turning %s %s\n", enable ? "on" : "off", p->name); + + rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg)); + if (rc) + return rc; + + reg &= ~p->enable_mask; + if (enable) + reg |= p->enable; + else + reg |= p->disable_val; + + rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg)); + if (rc) + return rc; + + if (enable) + udelay(p->enable_time); + + return 0; +} + +static const struct dm_regulator_ops pbias_regulator_ops = { + .get_value = pbias_regulator_get_value, + .set_value = pbias_regulator_set_value, + .get_enable = pbias_regulator_get_enable, + .set_enable = pbias_regulator_set_enable, +}; + +U_BOOT_DRIVER(pbias_regulator) = { + .name = "pbias_regulator", + .id = UCLASS_REGULATOR, + .ops = &pbias_regulator_ops, + .probe = pbias_regulator_probe, +};
On 08/07/2017 06:43 PM, Jean-Jacques Hiblot wrote:
In the TI SOCs a PBIAS cell exists to provide a bias voltage to the MMC1 IO cells. Without this bias voltage these I/O cells can not function properly. The PBIAS cell is controlled by software.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Tom Rini trini@konsulko.com Reviewed-by: Simon Glass sjg@chromium.org
Applied to u-boot-mmc! Sorry for late.
Best Regards, Jaehoon Chung
Hi Jaehoon,
Here is the patch for the PBIAS regulator. I modified the KConfig to select the REGMAP and SYSCON features as you suggested. Thanks. JJ
changes since v2:
- automatically select REGMAP and SYSCON if PBIAS is selected.
changes since v1:
- automatically select the PBIAS driver if DM_REGULATOR, DM_MMC and MMC_OMAP_HS are set
- use the dev_read_*() API to access the DT
drivers/mmc/Kconfig | 1 + drivers/power/regulator/Kconfig | 13 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/pbias_regulator.c | 302 ++++++++++++++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 drivers/power/regulator/pbias_regulator.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 588e118..63e1122 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -158,6 +158,7 @@ config MMC_PCI config MMC_OMAP_HS bool "TI OMAP High Speed Multimedia Card Interface support" select DM_MMC_OPS if DM_MMC
- select DM_REGULATOR_PBIAS if DM_MMC && DM_REGULATOR help This selects the TI OMAP High Speed Multimedia card Interface. If you have an omap2plus board with a Multimedia Card slot,
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index f213487..cb5ea08 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -142,6 +142,19 @@ config DM_REGULATOR_PALMAS features for REGULATOR PALMAS and the family of PALMAS PMICs. The driver implements get/set api for: value and enable.
+config DM_REGULATOR_PBIAS
- bool "Enable driver for PBIAS regulator"
- depends on DM_REGULATOR
- select REGMAP
- select SYSCON
- ---help---
- This enables implementation of driver-model regulator uclass
- features for pseudo-regulator PBIAS found in the OMAP SOCs.
- This pseudo-regulator is used to provide a BIAS voltage to MMC1
- signal pads and must be configured properly during a voltage switch.
- Voltage switching is required by some operating modes of SDcards and
- eMMC.
config DM_REGULATOR_LP873X bool "Enable driver for LP873X PMIC regulators" depends on PMIC_LP873X diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index ce14d08..75d611a 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -17,5 +17,6 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_PBIAS) += pbias_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o diff --git a/drivers/power/regulator/pbias_regulator.c b/drivers/power/regulator/pbias_regulator.c new file mode 100644 index 0000000..303eca9 --- /dev/null +++ b/drivers/power/regulator/pbias_regulator.c @@ -0,0 +1,302 @@ +/*
- (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
- Jean-Jacques Hiblot jjhiblot@ti.com
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <errno.h> +#include <dm.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <regmap.h> +#include <syscon.h> +#include <linux/bitops.h> +#include <linux/ioport.h> +#include <dm/read.h>
+DECLARE_GLOBAL_DATA_PTR;
+struct pbias_reg_info {
- u32 enable;
- u32 enable_mask;
- u32 disable_val;
- u32 vmode;
- unsigned int enable_time;
- char *name;
+};
+struct pbias_priv {
- struct regmap *regmap;
- int offset;
+};
+static const struct pmic_child_info pmic_children_info[] = {
- { .prefix = "pbias", .driver = "pbias_regulator"},
- { },
+};
+static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)+{
- struct pbias_priv *priv = dev_get_priv(dev);
- uint32_t val = *(uint32_t *)buff;
- if (len != 4)
return -EINVAL;- return regmap_write(priv->regmap, priv->offset, val);
+}
+static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- if (len != 4)
return -EINVAL;- return regmap_read(priv->regmap, priv->offset, (uint32_t *)buff);
+}
+static int pbias_ofdata_to_platdata(struct udevice *dev) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- struct udevice *syscon;
- struct regmap *regmap;
- struct resource res;
- int err;
- err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
"syscon", &syscon);- if (err) {
error("%s: unable to find syscon device (%d)\n", __func__,err);return err;- }
- regmap = syscon_get_regmap(syscon);
- if (IS_ERR(regmap)) {
error("%s: unable to find regmap (%ld)\n", __func__,PTR_ERR(regmap));return PTR_ERR(regmap);- }
- priv->regmap = regmap;
- err = dev_read_resource(dev, 0, &res);
- if (err) {
error("%s: unable to find offset (%d)\n", __func__, err);return err;- }
- priv->offset = res.start;
- return 0;
+}
+static int pbias_bind(struct udevice *dev) +{
- int children;
- children = pmic_bind_children(dev, dev->node, pmic_children_info);
- if (!children)
debug("%s: %s - no child found\n", __func__, dev->name);- return 0;
+}
+static struct dm_pmic_ops pbias_ops = {
- .read = pbias_read,
- .write = pbias_write,
+};
+static const struct udevice_id pbias_ids[] = {
- { .compatible = "ti,pbias-dra7" },
- { }
+};
+U_BOOT_DRIVER(pbias_pmic) = {
- .name = "pbias_pmic",
- .id = UCLASS_PMIC,
- .of_match = pbias_ids,
- .bind = pbias_bind,
- .ops = &pbias_ops,
- .ofdata_to_platdata = pbias_ofdata_to_platdata,
- .priv_auto_alloc_size = sizeof(struct pbias_priv),
+};
+static const struct pbias_reg_info pbias_mmc_omap2430 = {
- .enable = BIT(1),
- .enable_mask = BIT(1),
- .vmode = BIT(0),
- .disable_val = 0,
- .enable_time = 100,
- .name = "pbias_mmc_omap2430"
+};
+static const struct pbias_reg_info pbias_sim_omap3 = {
- .enable = BIT(9),
- .enable_mask = BIT(9),
- .vmode = BIT(8),
- .enable_time = 100,
- .name = "pbias_sim_omap3"
+};
+static const struct pbias_reg_info pbias_mmc_omap4 = {
- .enable = BIT(26) | BIT(22),
- .enable_mask = BIT(26) | BIT(25) | BIT(22),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap4"
+};
+static const struct pbias_reg_info pbias_mmc_omap5 = {
- .enable = BIT(27) | BIT(26),
- .enable_mask = BIT(27) | BIT(25) | BIT(26),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap5"
+};
+static const struct pbias_reg_info *pbias_reg_infos[] = {
- &pbias_mmc_omap5,
- &pbias_mmc_omap4,
- &pbias_sim_omap3,
- &pbias_mmc_omap2430,
- NULL
+};
+static int pbias_regulator_probe(struct udevice *dev) +{
- const struct pbias_reg_info **p = pbias_reg_infos;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(dev);
- while (*p) {
int rc;rc = dev_read_stringlist_search(dev, "regulator-name",(*p)->name);if (rc >= 0) {debug("found regulator %s\n", (*p)->name);break;} else if (rc != -ENODATA) {return rc;}p++;- }
- if (!*p) {
int i = 0;const char *s;debug("regulator ");while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0)debug("%s'%s' ", (i > 1) ? ", " : "", s);debug("%s not supported\n", (i > 2) ? "are" : "is");return -EINVAL;- }
- uc_pdata->type = REGULATOR_TYPE_OTHER;
- dev->priv = (void *)*p;
- return 0;
+}
+static int pbias_regulator_get_value(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s voltage id %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- return (reg & p->vmode) ? 3000000 : 1800000;
+}
+static int pbias_regulator_set_value(struct udevice *dev, int uV) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Setting %s voltage to %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (uV == 3000000)
reg |= p->vmode;- else if (uV == 1800000)
reg &= ~p->vmode;- else
return -EINVAL;- return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
+}
+static int pbias_regulator_get_enable(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s id %s\n", p->name,
(reg & p->enable_mask) == (p->disable_val) ? "on" : "off");- return (reg & p->enable_mask) == (p->disable_val);
+}
+static int pbias_regulator_set_enable(struct udevice *dev, bool enable) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Turning %s %s\n", enable ? "on" : "off", p->name);
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- reg &= ~p->enable_mask;
- if (enable)
reg |= p->enable;- else
reg |= p->disable_val;- rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (enable)
udelay(p->enable_time);- return 0;
+}
+static const struct dm_regulator_ops pbias_regulator_ops = {
- .get_value = pbias_regulator_get_value,
- .set_value = pbias_regulator_set_value,
- .get_enable = pbias_regulator_get_enable,
- .set_enable = pbias_regulator_set_enable,
+};
+U_BOOT_DRIVER(pbias_regulator) = {
- .name = "pbias_regulator",
- .id = UCLASS_REGULATOR,
- .ops = &pbias_regulator_ops,
- .probe = pbias_regulator_probe,
+};
Dear JJ,
On 08/07/2017 06:43 PM, Jean-Jacques Hiblot wrote:
In the TI SOCs a PBIAS cell exists to provide a bias voltage to the MMC1 IO cells. Without this bias voltage these I/O cells can not function properly. The PBIAS cell is controlled by software.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Tom Rini trini@konsulko.com Reviewed-by: Simon Glass sjg@chromium.org
There is an error..
arm: + am57xx_evm +drivers/power/regulator/built-in.o: In function `pbias_regulator_probe': +drivers/power/regulator/pbias_regulator.c:196: undefined reference to `dev_read_string_index'
i didn't find the dev_read_string_index()..Is there any patch?
Best Regards, Jaehoon Chung
Hi Jaehoon,
Here is the patch for the PBIAS regulator. I modified the KConfig to select the REGMAP and SYSCON features as you suggested. Thanks. JJ
changes since v2:
- automatically select REGMAP and SYSCON if PBIAS is selected.
changes since v1:
- automatically select the PBIAS driver if DM_REGULATOR, DM_MMC and MMC_OMAP_HS are set
- use the dev_read_*() API to access the DT
drivers/mmc/Kconfig | 1 + drivers/power/regulator/Kconfig | 13 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/pbias_regulator.c | 302 ++++++++++++++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 drivers/power/regulator/pbias_regulator.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 588e118..63e1122 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -158,6 +158,7 @@ config MMC_PCI config MMC_OMAP_HS bool "TI OMAP High Speed Multimedia Card Interface support" select DM_MMC_OPS if DM_MMC
- select DM_REGULATOR_PBIAS if DM_MMC && DM_REGULATOR help This selects the TI OMAP High Speed Multimedia card Interface. If you have an omap2plus board with a Multimedia Card slot,
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index f213487..cb5ea08 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -142,6 +142,19 @@ config DM_REGULATOR_PALMAS features for REGULATOR PALMAS and the family of PALMAS PMICs. The driver implements get/set api for: value and enable.
+config DM_REGULATOR_PBIAS
- bool "Enable driver for PBIAS regulator"
- depends on DM_REGULATOR
- select REGMAP
- select SYSCON
- ---help---
- This enables implementation of driver-model regulator uclass
- features for pseudo-regulator PBIAS found in the OMAP SOCs.
- This pseudo-regulator is used to provide a BIAS voltage to MMC1
- signal pads and must be configured properly during a voltage switch.
- Voltage switching is required by some operating modes of SDcards and
- eMMC.
config DM_REGULATOR_LP873X bool "Enable driver for LP873X PMIC regulators" depends on PMIC_LP873X diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index ce14d08..75d611a 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -17,5 +17,6 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_PBIAS) += pbias_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o diff --git a/drivers/power/regulator/pbias_regulator.c b/drivers/power/regulator/pbias_regulator.c new file mode 100644 index 0000000..303eca9 --- /dev/null +++ b/drivers/power/regulator/pbias_regulator.c @@ -0,0 +1,302 @@ +/*
- (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
- Jean-Jacques Hiblot jjhiblot@ti.com
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <errno.h> +#include <dm.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <regmap.h> +#include <syscon.h> +#include <linux/bitops.h> +#include <linux/ioport.h> +#include <dm/read.h>
+DECLARE_GLOBAL_DATA_PTR;
+struct pbias_reg_info {
- u32 enable;
- u32 enable_mask;
- u32 disable_val;
- u32 vmode;
- unsigned int enable_time;
- char *name;
+};
+struct pbias_priv {
- struct regmap *regmap;
- int offset;
+};
+static const struct pmic_child_info pmic_children_info[] = {
- { .prefix = "pbias", .driver = "pbias_regulator"},
- { },
+};
+static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)+{
- struct pbias_priv *priv = dev_get_priv(dev);
- uint32_t val = *(uint32_t *)buff;
- if (len != 4)
return -EINVAL;- return regmap_write(priv->regmap, priv->offset, val);
+}
+static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- if (len != 4)
return -EINVAL;- return regmap_read(priv->regmap, priv->offset, (uint32_t *)buff);
+}
+static int pbias_ofdata_to_platdata(struct udevice *dev) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- struct udevice *syscon;
- struct regmap *regmap;
- struct resource res;
- int err;
- err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
"syscon", &syscon);- if (err) {
error("%s: unable to find syscon device (%d)\n", __func__,err);return err;- }
- regmap = syscon_get_regmap(syscon);
- if (IS_ERR(regmap)) {
error("%s: unable to find regmap (%ld)\n", __func__,PTR_ERR(regmap));return PTR_ERR(regmap);- }
- priv->regmap = regmap;
- err = dev_read_resource(dev, 0, &res);
- if (err) {
error("%s: unable to find offset (%d)\n", __func__, err);return err;- }
- priv->offset = res.start;
- return 0;
+}
+static int pbias_bind(struct udevice *dev) +{
- int children;
- children = pmic_bind_children(dev, dev->node, pmic_children_info);
- if (!children)
debug("%s: %s - no child found\n", __func__, dev->name);- return 0;
+}
+static struct dm_pmic_ops pbias_ops = {
- .read = pbias_read,
- .write = pbias_write,
+};
+static const struct udevice_id pbias_ids[] = {
- { .compatible = "ti,pbias-dra7" },
- { }
+};
+U_BOOT_DRIVER(pbias_pmic) = {
- .name = "pbias_pmic",
- .id = UCLASS_PMIC,
- .of_match = pbias_ids,
- .bind = pbias_bind,
- .ops = &pbias_ops,
- .ofdata_to_platdata = pbias_ofdata_to_platdata,
- .priv_auto_alloc_size = sizeof(struct pbias_priv),
+};
+static const struct pbias_reg_info pbias_mmc_omap2430 = {
- .enable = BIT(1),
- .enable_mask = BIT(1),
- .vmode = BIT(0),
- .disable_val = 0,
- .enable_time = 100,
- .name = "pbias_mmc_omap2430"
+};
+static const struct pbias_reg_info pbias_sim_omap3 = {
- .enable = BIT(9),
- .enable_mask = BIT(9),
- .vmode = BIT(8),
- .enable_time = 100,
- .name = "pbias_sim_omap3"
+};
+static const struct pbias_reg_info pbias_mmc_omap4 = {
- .enable = BIT(26) | BIT(22),
- .enable_mask = BIT(26) | BIT(25) | BIT(22),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap4"
+};
+static const struct pbias_reg_info pbias_mmc_omap5 = {
- .enable = BIT(27) | BIT(26),
- .enable_mask = BIT(27) | BIT(25) | BIT(26),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap5"
+};
+static const struct pbias_reg_info *pbias_reg_infos[] = {
- &pbias_mmc_omap5,
- &pbias_mmc_omap4,
- &pbias_sim_omap3,
- &pbias_mmc_omap2430,
- NULL
+};
+static int pbias_regulator_probe(struct udevice *dev) +{
- const struct pbias_reg_info **p = pbias_reg_infos;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(dev);
- while (*p) {
int rc;rc = dev_read_stringlist_search(dev, "regulator-name",(*p)->name);if (rc >= 0) {debug("found regulator %s\n", (*p)->name);break;} else if (rc != -ENODATA) {return rc;}p++;- }
- if (!*p) {
int i = 0;const char *s;debug("regulator ");while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0)debug("%s'%s' ", (i > 1) ? ", " : "", s);debug("%s not supported\n", (i > 2) ? "are" : "is");return -EINVAL;- }
- uc_pdata->type = REGULATOR_TYPE_OTHER;
- dev->priv = (void *)*p;
- return 0;
+}
+static int pbias_regulator_get_value(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s voltage id %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- return (reg & p->vmode) ? 3000000 : 1800000;
+}
+static int pbias_regulator_set_value(struct udevice *dev, int uV) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Setting %s voltage to %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (uV == 3000000)
reg |= p->vmode;- else if (uV == 1800000)
reg &= ~p->vmode;- else
return -EINVAL;- return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
+}
+static int pbias_regulator_get_enable(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s id %s\n", p->name,
(reg & p->enable_mask) == (p->disable_val) ? "on" : "off");- return (reg & p->enable_mask) == (p->disable_val);
+}
+static int pbias_regulator_set_enable(struct udevice *dev, bool enable) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Turning %s %s\n", enable ? "on" : "off", p->name);
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- reg &= ~p->enable_mask;
- if (enable)
reg |= p->enable;- else
reg |= p->disable_val;- rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (enable)
udelay(p->enable_time);- return 0;
+}
+static const struct dm_regulator_ops pbias_regulator_ops = {
- .get_value = pbias_regulator_get_value,
- .set_value = pbias_regulator_set_value,
- .get_enable = pbias_regulator_get_enable,
- .set_enable = pbias_regulator_set_enable,
+};
+U_BOOT_DRIVER(pbias_regulator) = {
- .name = "pbias_regulator",
- .id = UCLASS_REGULATOR,
- .ops = &pbias_regulator_ops,
- .probe = pbias_regulator_probe,
+};
Hi Jaehoon,
On 18/08/2017 08:52, Jaehoon Chung wrote:
Dear JJ,
On 08/07/2017 06:43 PM, Jean-Jacques Hiblot wrote:
In the TI SOCs a PBIAS cell exists to provide a bias voltage to the MMC1 IO cells. Without this bias voltage these I/O cells can not function properly. The PBIAS cell is controlled by software.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Tom Rini trini@konsulko.com Reviewed-by: Simon Glass sjg@chromium.org
There is an error..
arm: + am57xx_evm+drivers/power/regulator/built-in.o: In function `pbias_regulator_probe': +drivers/power/regulator/pbias_regulator.c:196: undefined reference to `dev_read_string_index'
i didn't find the dev_read_string_index()..Is there any patch?
This function has been defined in patch : "[PATCH v2 1/3] dm: core: Add functions to get strings and the string count from a stringlist" I thought it was already applied to u-boot-mmc.
Thanks, Jean-Jacques
Best Regards, Jaehoon Chung
Hi Jaehoon,
Here is the patch for the PBIAS regulator. I modified the KConfig to select the REGMAP and SYSCON features as you suggested. Thanks. JJ
changes since v2:
- automatically select REGMAP and SYSCON if PBIAS is selected.
changes since v1:
- automatically select the PBIAS driver if DM_REGULATOR, DM_MMC and MMC_OMAP_HS are set
- use the dev_read_*() API to access the DT
drivers/mmc/Kconfig | 1 + drivers/power/regulator/Kconfig | 13 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/pbias_regulator.c | 302 ++++++++++++++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 drivers/power/regulator/pbias_regulator.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 588e118..63e1122 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -158,6 +158,7 @@ config MMC_PCI config MMC_OMAP_HS bool "TI OMAP High Speed Multimedia Card Interface support" select DM_MMC_OPS if DM_MMC
- select DM_REGULATOR_PBIAS if DM_MMC && DM_REGULATOR help This selects the TI OMAP High Speed Multimedia card Interface. If you have an omap2plus board with a Multimedia Card slot,
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index f213487..cb5ea08 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -142,6 +142,19 @@ config DM_REGULATOR_PALMAS features for REGULATOR PALMAS and the family of PALMAS PMICs. The driver implements get/set api for: value and enable.
+config DM_REGULATOR_PBIAS
- bool "Enable driver for PBIAS regulator"
- depends on DM_REGULATOR
- select REGMAP
- select SYSCON
- ---help---
- This enables implementation of driver-model regulator uclass
- features for pseudo-regulator PBIAS found in the OMAP SOCs.
- This pseudo-regulator is used to provide a BIAS voltage to MMC1
- signal pads and must be configured properly during a voltage switch.
- Voltage switching is required by some operating modes of SDcards and
- eMMC.
- config DM_REGULATOR_LP873X bool "Enable driver for LP873X PMIC regulators" depends on PMIC_LP873X
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index ce14d08..75d611a 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -17,5 +17,6 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_PBIAS) += pbias_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o diff --git a/drivers/power/regulator/pbias_regulator.c b/drivers/power/regulator/pbias_regulator.c new file mode 100644 index 0000000..303eca9 --- /dev/null +++ b/drivers/power/regulator/pbias_regulator.c @@ -0,0 +1,302 @@ +/*
- (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
- Jean-Jacques Hiblot jjhiblot@ti.com
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <errno.h> +#include <dm.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <regmap.h> +#include <syscon.h> +#include <linux/bitops.h> +#include <linux/ioport.h> +#include <dm/read.h>
+DECLARE_GLOBAL_DATA_PTR;
+struct pbias_reg_info {
- u32 enable;
- u32 enable_mask;
- u32 disable_val;
- u32 vmode;
- unsigned int enable_time;
- char *name;
+};
+struct pbias_priv {
- struct regmap *regmap;
- int offset;
+};
+static const struct pmic_child_info pmic_children_info[] = {
- { .prefix = "pbias", .driver = "pbias_regulator"},
- { },
+};
+static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)+{
- struct pbias_priv *priv = dev_get_priv(dev);
- uint32_t val = *(uint32_t *)buff;
- if (len != 4)
return -EINVAL;- return regmap_write(priv->regmap, priv->offset, val);
+}
+static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- if (len != 4)
return -EINVAL;- return regmap_read(priv->regmap, priv->offset, (uint32_t *)buff);
+}
+static int pbias_ofdata_to_platdata(struct udevice *dev) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- struct udevice *syscon;
- struct regmap *regmap;
- struct resource res;
- int err;
- err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
"syscon", &syscon);- if (err) {
error("%s: unable to find syscon device (%d)\n", __func__,err);return err;- }
- regmap = syscon_get_regmap(syscon);
- if (IS_ERR(regmap)) {
error("%s: unable to find regmap (%ld)\n", __func__,PTR_ERR(regmap));return PTR_ERR(regmap);- }
- priv->regmap = regmap;
- err = dev_read_resource(dev, 0, &res);
- if (err) {
error("%s: unable to find offset (%d)\n", __func__, err);return err;- }
- priv->offset = res.start;
- return 0;
+}
+static int pbias_bind(struct udevice *dev) +{
- int children;
- children = pmic_bind_children(dev, dev->node, pmic_children_info);
- if (!children)
debug("%s: %s - no child found\n", __func__, dev->name);- return 0;
+}
+static struct dm_pmic_ops pbias_ops = {
- .read = pbias_read,
- .write = pbias_write,
+};
+static const struct udevice_id pbias_ids[] = {
- { .compatible = "ti,pbias-dra7" },
- { }
+};
+U_BOOT_DRIVER(pbias_pmic) = {
- .name = "pbias_pmic",
- .id = UCLASS_PMIC,
- .of_match = pbias_ids,
- .bind = pbias_bind,
- .ops = &pbias_ops,
- .ofdata_to_platdata = pbias_ofdata_to_platdata,
- .priv_auto_alloc_size = sizeof(struct pbias_priv),
+};
+static const struct pbias_reg_info pbias_mmc_omap2430 = {
- .enable = BIT(1),
- .enable_mask = BIT(1),
- .vmode = BIT(0),
- .disable_val = 0,
- .enable_time = 100,
- .name = "pbias_mmc_omap2430"
+};
+static const struct pbias_reg_info pbias_sim_omap3 = {
- .enable = BIT(9),
- .enable_mask = BIT(9),
- .vmode = BIT(8),
- .enable_time = 100,
- .name = "pbias_sim_omap3"
+};
+static const struct pbias_reg_info pbias_mmc_omap4 = {
- .enable = BIT(26) | BIT(22),
- .enable_mask = BIT(26) | BIT(25) | BIT(22),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap4"
+};
+static const struct pbias_reg_info pbias_mmc_omap5 = {
- .enable = BIT(27) | BIT(26),
- .enable_mask = BIT(27) | BIT(25) | BIT(26),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap5"
+};
+static const struct pbias_reg_info *pbias_reg_infos[] = {
- &pbias_mmc_omap5,
- &pbias_mmc_omap4,
- &pbias_sim_omap3,
- &pbias_mmc_omap2430,
- NULL
+};
+static int pbias_regulator_probe(struct udevice *dev) +{
- const struct pbias_reg_info **p = pbias_reg_infos;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(dev);
- while (*p) {
int rc;rc = dev_read_stringlist_search(dev, "regulator-name",(*p)->name);if (rc >= 0) {debug("found regulator %s\n", (*p)->name);break;} else if (rc != -ENODATA) {return rc;}p++;- }
- if (!*p) {
int i = 0;const char *s;debug("regulator ");while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0)debug("%s'%s' ", (i > 1) ? ", " : "", s);debug("%s not supported\n", (i > 2) ? "are" : "is");return -EINVAL;- }
- uc_pdata->type = REGULATOR_TYPE_OTHER;
- dev->priv = (void *)*p;
- return 0;
+}
+static int pbias_regulator_get_value(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s voltage id %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- return (reg & p->vmode) ? 3000000 : 1800000;
+}
+static int pbias_regulator_set_value(struct udevice *dev, int uV) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Setting %s voltage to %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (uV == 3000000)
reg |= p->vmode;- else if (uV == 1800000)
reg &= ~p->vmode;- else
return -EINVAL;- return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
+}
+static int pbias_regulator_get_enable(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s id %s\n", p->name,
(reg & p->enable_mask) == (p->disable_val) ? "on" : "off");- return (reg & p->enable_mask) == (p->disable_val);
+}
+static int pbias_regulator_set_enable(struct udevice *dev, bool enable) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Turning %s %s\n", enable ? "on" : "off", p->name);
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- reg &= ~p->enable_mask;
- if (enable)
reg |= p->enable;- else
reg |= p->disable_val;- rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (enable)
udelay(p->enable_time);- return 0;
+}
+static const struct dm_regulator_ops pbias_regulator_ops = {
- .get_value = pbias_regulator_get_value,
- .set_value = pbias_regulator_set_value,
- .get_enable = pbias_regulator_get_enable,
- .set_enable = pbias_regulator_set_enable,
+};
+U_BOOT_DRIVER(pbias_regulator) = {
- .name = "pbias_regulator",
- .id = UCLASS_REGULATOR,
- .ops = &pbias_regulator_ops,
- .probe = pbias_regulator_probe,
+};
Hi JJ,
On 08/18/2017 05:41 PM, Jean-Jacques Hiblot wrote:
Hi Jaehoon,
On 18/08/2017 08:52, Jaehoon Chung wrote:
Dear JJ,
On 08/07/2017 06:43 PM, Jean-Jacques Hiblot wrote:
In the TI SOCs a PBIAS cell exists to provide a bias voltage to the MMC1 IO cells. Without this bias voltage these I/O cells can not function properly. The PBIAS cell is controlled by software.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Tom Rini trini@konsulko.com Reviewed-by: Simon Glass sjg@chromium.org
There is an error..
arm: + am57xx_evm+drivers/power/regulator/built-in.o: In function `pbias_regulator_probe': +drivers/power/regulator/pbias_regulator.c:196: undefined reference to `dev_read_string_index'
i didn't find the dev_read_string_index()..Is there any patch?
This function has been defined in patch : "[PATCH v2 1/3] dm: core: Add functions to get strings and the string count from a stringlist" I thought it was already applied to u-boot-mmc.
Will check. Thanks for sharing it.
Best Regards, Jaehoon Chung
Thanks, Jean-Jacques
Best Regards, Jaehoon Chung
Hi Jaehoon,
Here is the patch for the PBIAS regulator. I modified the KConfig to select the REGMAP and SYSCON features as you suggested. Thanks. JJ
changes since v2:
- automatically select REGMAP and SYSCON if PBIAS is selected.
changes since v1:
- automatically select the PBIAS driver if DM_REGULATOR, DM_MMC and MMC_OMAP_HS are set
- use the dev_read_*() API to access the DT
drivers/mmc/Kconfig | 1 + drivers/power/regulator/Kconfig | 13 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/pbias_regulator.c | 302 ++++++++++++++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 drivers/power/regulator/pbias_regulator.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 588e118..63e1122 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -158,6 +158,7 @@ config MMC_PCI config MMC_OMAP_HS bool "TI OMAP High Speed Multimedia Card Interface support" select DM_MMC_OPS if DM_MMC
- select DM_REGULATOR_PBIAS if DM_MMC && DM_REGULATOR help This selects the TI OMAP High Speed Multimedia card Interface. If you have an omap2plus board with a Multimedia Card slot,
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index f213487..cb5ea08 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -142,6 +142,19 @@ config DM_REGULATOR_PALMAS features for REGULATOR PALMAS and the family of PALMAS PMICs. The driver implements get/set api for: value and enable. +config DM_REGULATOR_PBIAS
- bool "Enable driver for PBIAS regulator"
- depends on DM_REGULATOR
- select REGMAP
- select SYSCON
- ---help---
- This enables implementation of driver-model regulator uclass
- features for pseudo-regulator PBIAS found in the OMAP SOCs.
- This pseudo-regulator is used to provide a BIAS voltage to MMC1
- signal pads and must be configured properly during a voltage switch.
- Voltage switching is required by some operating modes of SDcards and
- eMMC.
- config DM_REGULATOR_LP873X bool "Enable driver for LP873X PMIC regulators" depends on PMIC_LP873X
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index ce14d08..75d611a 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -17,5 +17,6 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_PBIAS) += pbias_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o diff --git a/drivers/power/regulator/pbias_regulator.c b/drivers/power/regulator/pbias_regulator.c new file mode 100644 index 0000000..303eca9 --- /dev/null +++ b/drivers/power/regulator/pbias_regulator.c @@ -0,0 +1,302 @@ +/*
- (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
- Jean-Jacques Hiblot jjhiblot@ti.com
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <errno.h> +#include <dm.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <regmap.h> +#include <syscon.h> +#include <linux/bitops.h> +#include <linux/ioport.h> +#include <dm/read.h>
+DECLARE_GLOBAL_DATA_PTR;
+struct pbias_reg_info {
- u32 enable;
- u32 enable_mask;
- u32 disable_val;
- u32 vmode;
- unsigned int enable_time;
- char *name;
+};
+struct pbias_priv {
- struct regmap *regmap;
- int offset;
+};
+static const struct pmic_child_info pmic_children_info[] = {
- { .prefix = "pbias", .driver = "pbias_regulator"},
- { },
+};
+static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)+{
- struct pbias_priv *priv = dev_get_priv(dev);
- uint32_t val = *(uint32_t *)buff;
- if (len != 4)
return -EINVAL;- return regmap_write(priv->regmap, priv->offset, val);
+}
+static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- if (len != 4)
return -EINVAL;- return regmap_read(priv->regmap, priv->offset, (uint32_t *)buff);
+}
+static int pbias_ofdata_to_platdata(struct udevice *dev) +{
- struct pbias_priv *priv = dev_get_priv(dev);
- struct udevice *syscon;
- struct regmap *regmap;
- struct resource res;
- int err;
- err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
"syscon", &syscon);- if (err) {
error("%s: unable to find syscon device (%d)\n", __func__,err);return err;- }
- regmap = syscon_get_regmap(syscon);
- if (IS_ERR(regmap)) {
error("%s: unable to find regmap (%ld)\n", __func__,PTR_ERR(regmap));return PTR_ERR(regmap);- }
- priv->regmap = regmap;
- err = dev_read_resource(dev, 0, &res);
- if (err) {
error("%s: unable to find offset (%d)\n", __func__, err);return err;- }
- priv->offset = res.start;
- return 0;
+}
+static int pbias_bind(struct udevice *dev) +{
- int children;
- children = pmic_bind_children(dev, dev->node, pmic_children_info);
- if (!children)
debug("%s: %s - no child found\n", __func__, dev->name);- return 0;
+}
+static struct dm_pmic_ops pbias_ops = {
- .read = pbias_read,
- .write = pbias_write,
+};
+static const struct udevice_id pbias_ids[] = {
- { .compatible = "ti,pbias-dra7" },
- { }
+};
+U_BOOT_DRIVER(pbias_pmic) = {
- .name = "pbias_pmic",
- .id = UCLASS_PMIC,
- .of_match = pbias_ids,
- .bind = pbias_bind,
- .ops = &pbias_ops,
- .ofdata_to_platdata = pbias_ofdata_to_platdata,
- .priv_auto_alloc_size = sizeof(struct pbias_priv),
+};
+static const struct pbias_reg_info pbias_mmc_omap2430 = {
- .enable = BIT(1),
- .enable_mask = BIT(1),
- .vmode = BIT(0),
- .disable_val = 0,
- .enable_time = 100,
- .name = "pbias_mmc_omap2430"
+};
+static const struct pbias_reg_info pbias_sim_omap3 = {
- .enable = BIT(9),
- .enable_mask = BIT(9),
- .vmode = BIT(8),
- .enable_time = 100,
- .name = "pbias_sim_omap3"
+};
+static const struct pbias_reg_info pbias_mmc_omap4 = {
- .enable = BIT(26) | BIT(22),
- .enable_mask = BIT(26) | BIT(25) | BIT(22),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap4"
+};
+static const struct pbias_reg_info pbias_mmc_omap5 = {
- .enable = BIT(27) | BIT(26),
- .enable_mask = BIT(27) | BIT(25) | BIT(26),
- .disable_val = BIT(25),
- .vmode = BIT(21),
- .enable_time = 100,
- .name = "pbias_mmc_omap5"
+};
+static const struct pbias_reg_info *pbias_reg_infos[] = {
- &pbias_mmc_omap5,
- &pbias_mmc_omap4,
- &pbias_sim_omap3,
- &pbias_mmc_omap2430,
- NULL
+};
+static int pbias_regulator_probe(struct udevice *dev) +{
- const struct pbias_reg_info **p = pbias_reg_infos;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(dev);
- while (*p) {
int rc;rc = dev_read_stringlist_search(dev, "regulator-name",(*p)->name);if (rc >= 0) {debug("found regulator %s\n", (*p)->name);break;} else if (rc != -ENODATA) {return rc;}p++;- }
- if (!*p) {
int i = 0;const char *s;debug("regulator ");while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0)debug("%s'%s' ", (i > 1) ? ", " : "", s);debug("%s not supported\n", (i > 2) ? "are" : "is");return -EINVAL;- }
- uc_pdata->type = REGULATOR_TYPE_OTHER;
- dev->priv = (void *)*p;
- return 0;
+}
+static int pbias_regulator_get_value(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s voltage id %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- return (reg & p->vmode) ? 3000000 : 1800000;
+}
+static int pbias_regulator_set_value(struct udevice *dev, int uV) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Setting %s voltage to %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (uV == 3000000)
reg |= p->vmode;- else if (uV == 1800000)
reg &= ~p->vmode;- else
return -EINVAL;- return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
+}
+static int pbias_regulator_get_enable(struct udevice *dev) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- debug("%s id %s\n", p->name,
(reg & p->enable_mask) == (p->disable_val) ? "on" : "off");- return (reg & p->enable_mask) == (p->disable_val);
+}
+static int pbias_regulator_set_enable(struct udevice *dev, bool enable) +{
- const struct pbias_reg_info *p = dev_get_priv(dev);
- int rc;
- uint32_t reg;
- debug("Turning %s %s\n", enable ? "on" : "off", p->name);
- rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- reg &= ~p->enable_mask;
- if (enable)
reg |= p->enable;- else
reg |= p->disable_val;- rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
- if (rc)
return rc;- if (enable)
udelay(p->enable_time);- return 0;
+}
+static const struct dm_regulator_ops pbias_regulator_ops = {
- .get_value = pbias_regulator_get_value,
- .set_value = pbias_regulator_set_value,
- .get_enable = pbias_regulator_get_enable,
- .set_enable = pbias_regulator_set_enable,
+};
+U_BOOT_DRIVER(pbias_regulator) = {
- .name = "pbias_regulator",
- .id = UCLASS_REGULATOR,
- .ops = &pbias_regulator_ops,
- .probe = pbias_regulator_probe,
+};
participants (2)
-
Jaehoon Chung -
Jean-Jacques Hiblot