Re: [U-Boot] [PATCH 20/26] dm: power: Convert as3722 to driver model

On Fri, 19 May 2017 08:31:03 -0600 Simon Glass sjg@chromium.org wrote:

Convert this PMIC driver to driver model and fix up other users. The regulator and GPIO functions are now handled by separate drivers.

Note that this currently breaks apalis-tk1, jetson-tk1 and cei-tk1-som. I have the middle one so will tidy that up in the next version, at least.

Reviewed-by: Lukasz Majewski lukma@denx.de

Signed-off-by: Simon Glass sjg@chromium.org

arch/arm/mach-tegra/board2.c | 6 - board/nvidia/nyan-big/nyan-big.c | 22 +-- configs/nyan-big_defconfig | 1 + drivers/power/pmic/Makefile | 2 +- drivers/power/pmic/as3722.c | 292 +++++++++++++-------------------------- include/power/as3722.h | 18 +-- 6 files changed, 114 insertions(+), 227 deletions(-)

diff --git a/arch/arm/mach-tegra/board2.c b/arch/arm/mach-tegra/board2.c index 5aedd3ef9d..0291c7fb33 100644 --- a/arch/arm/mach-tegra/board2.c +++ b/arch/arm/mach-tegra/board2.c @@ -29,7 +29,6 @@ #ifdef CONFIG_TEGRA_CLOCK_SCALING #include <asm/arch/emc.h> #endif -#include <power/as3722.h> #include "emc.h"

DECLARE_GLOBAL_DATA_PTR; @@ -142,11 +141,6 @@ int board_init(void) debug("Memory controller init failed: %d\n", err); # endif # endif /* CONFIG_TEGRA_PMU */ -#ifdef CONFIG_PMIC_AS3722

• err = as3722_init(NULL);
• if (err && err != -ENODEV)

• return err;
  

-#endif #endif /* CONFIG_SYS_I2C_TEGRA */

#ifdef CONFIG_USB_EHCI_TEGRA diff --git a/board/nvidia/nyan-big/nyan-big.c b/board/nvidia/nyan-big/nyan-big.c index 8f68ae9fbe..54acf5418d 100644 --- a/board/nvidia/nyan-big/nyan-big.c +++ b/board/nvidia/nyan-big/nyan-big.c @@ -6,6 +6,7 @@ */

#include <common.h> +#include <dm.h> #include <errno.h> #include <asm/gpio.h> #include <asm/io.h> @@ -46,20 +47,23 @@ int tegra_board_id(void)

int tegra_lcd_pmic_init(int board_id) {

• struct udevice *pmic;

• struct udevice *dev; int ret;

• ret = as3722_get(&pmic);
• if (ret)

• return -ENOENT;
  

• ret = uclass_get_device_by_driver(UCLASS_PMIC,

DM_GET_DRIVER(pmic_as3722), &dev);

• if (ret) {

• debug("%s: Failed to find PMIC\n", __func__);
  

• return ret;
  

• }

  if (board_id == 0)

• as3722_write(pmic, 0x00, 0x3c);
  

• pmic_reg_write(dev, 0x00, 0x3c);
  

  else

• as3722_write(pmic, 0x00, 0x50);
  

• as3722_write(pmic, 0x12, 0x10);
• as3722_write(pmic, 0x0c, 0x07);
• as3722_write(pmic, 0x20, 0x10);

• pmic_reg_write(dev, 0x00, 0x50);
  

• pmic_reg_write(dev, 0x12, 0x10);

• pmic_reg_write(dev, 0x0c, 0x07);

• pmic_reg_write(dev, 0x20, 0x10);

  return 0;

} diff --git a/configs/nyan-big_defconfig b/configs/nyan-big_defconfig index 22769bdc93..a152ff6915 100644 --- a/configs/nyan-big_defconfig +++ b/configs/nyan-big_defconfig @@ -47,6 +47,7 @@ CONFIG_SPI_FLASH_WINBOND=y CONFIG_DM_PMIC=y CONFIG_PMIC_AS3722=y CONFIG_DM_REGULATOR=y +CONFIG_REGULATOR_AS3722=y CONFIG_DM_REGULATOR_FIXED=y CONFIG_PWM_TEGRA=y CONFIG_SYS_NS16550=y diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index f409e3a0b3..76dda2a070 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -12,7 +12,7 @@ obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze100.o obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o obj-$(CONFIG_PMIC_ACT8846) += act8846.o -obj-$(CONFIG_PMIC_AS3722) += as3722.o +obj-$(CONFIG_PMIC_AS3722) += as3722.o as3722_gpio.o obj-$(CONFIG_PMIC_MAX8997) += max8997.o obj-$(CONFIG_PMIC_PM8916) += pm8916.o obj-$(CONFIG_PMIC_RK8XX) += rk8xx.o diff --git a/drivers/power/pmic/as3722.c b/drivers/power/pmic/as3722.c index c09e1de06f..4efe8ee183 100644 --- a/drivers/power/pmic/as3722.c +++ b/drivers/power/pmic/as3722.c @@ -11,264 +11,168 @@ #include <errno.h> #include <fdtdec.h> #include <i2c.h>

+#include <dm/lists.h> #include <power/as3722.h> +#include <power/pmic.h>

-#define AS3722_SD_VOLTAGE(n) (0x00 + (n)) -#define AS3722_GPIO_CONTROL(n) (0x08 + (n)) -#define AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH (1 << 0) -#define AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL (7 << 0) -#define AS3722_GPIO_CONTROL_INVERT (1 << 7) -#define AS3722_LDO_VOLTAGE(n) (0x10 + (n)) -#define AS3722_GPIO_SIGNAL_OUT 0x20 -#define AS3722_SD_CONTROL 0x4d -#define AS3722_LDO_CONTROL 0x4e -#define AS3722_ASIC_ID1 0x90 -#define AS3722_DEVICE_ID 0x0c -#define AS3722_ASIC_ID2 0x91

-int as3722_read(struct udevice *pmic, u8 reg, u8 *value) -{

• int err;
• err = dm_i2c_read(pmic, reg, value, 1);
• if (err < 0)

• return err;
  

• return 0;

-} +#define AS3722_NUM_OF_REGS 0x92

-int as3722_write(struct udevice *pmic, u8 reg, u8 value) +static int as3722_read(struct udevice *dev, uint reg, uint8_t *buff, int len) {

• int err;

• int ret;

• err = dm_i2c_write(pmic, reg, &value, 1);
• if (err < 0)

• return err;
  

• ret = dm_i2c_read(dev, reg, buff, len);

• if (ret < 0)

• return ret;
  
  

  return 0;

}

-static int as3722_read_id(struct udevice *pmic, u8 *id, u8 *revision) +static int as3722_write(struct udevice *dev, uint reg, const uint8_t *buff,

• 	int len)
  

{

• int err;

• int ret;

• err = as3722_read(pmic, AS3722_ASIC_ID1, id);
• if (err) {

• error("failed to read ID1 register: %d", err);
  

• return err;
  

• }
• err = as3722_read(pmic, AS3722_ASIC_ID2, revision);
• if (err) {

• error("failed to read ID2 register: %d", err);
  

• return err;
  

• }

• ret = dm_i2c_write(dev, reg, buff, len);

• if (ret < 0)

• return ret;
  
  

  return 0;

}

-int as3722_sd_enable(struct udevice *pmic, unsigned int sd) +static int as3722_read_id(struct udevice *dev, uint *idp, uint *revisionp) {

• u8 value;
• int err;
• if (sd > 6)

• return -EINVAL;
  

• int ret;

• err = as3722_read(pmic, AS3722_SD_CONTROL, &value);
• if (err) {

• error("failed to read SD control register: %d", err);
  

• return err;
  

• ret = pmic_reg_read(dev, AS3722_ASIC_ID1);
• if (ret < 0) {

• error("failed to read ID1 register: %d", ret);
  

• return ret;
  

  }
• *idp = ret;

• value |= 1 << sd;
• err = as3722_write(pmic, AS3722_SD_CONTROL, value);
• if (err < 0) {

• error("failed to write SD control register: %d",
  

err);

• return err;
  

• ret = pmic_reg_read(dev, AS3722_ASIC_ID2);

• if (ret < 0) {

• error("failed to read ID2 register: %d", ret);
  

• return ret;
  

  }

• *revisionp = ret;

  return 0;

}

-int as3722_sd_set_voltage(struct udevice *pmic, unsigned int sd, u8 value) +/* TODO(treding@nvidia.com): Add proper regulator support to avoid this */ +int as3722_sd_set_voltage(struct udevice *dev, unsigned int sd, u8 value) {

• int err;

• int ret;

  if (sd > 6) return -EINVAL;

• err = as3722_write(pmic, AS3722_SD_VOLTAGE(sd), value);
• if (err < 0) {

• error("failed to write SD%u voltage register: %d",
  

sd, err);

• return err;
  

• ret = pmic_reg_write(dev, AS3722_SD_VOLTAGE(sd), value);
• if (ret < 0) {

• error("failed to write SD%u voltage register: %d",
  

sd, ret);

• return ret;
  

  }

  return 0;

}

-int as3722_ldo_enable(struct udevice *pmic, unsigned int ldo) +int as3722_ldo_set_voltage(struct udevice *dev, unsigned int ldo, u8 value) {

• u8 value;
• int err;

• int ret;

  if (ldo > 11) return -EINVAL;

• err = as3722_read(pmic, AS3722_LDO_CONTROL, &value);
• if (err) {

• error("failed to read LDO control register: %d",
  

err);

• return err;
  

• }
• value |= 1 << ldo;
• err = as3722_write(pmic, AS3722_LDO_CONTROL, value);
• if (err < 0) {

• error("failed to write LDO control register: %d",
  

err);

• return err;
  

• }
• return 0;

-}

-int as3722_ldo_set_voltage(struct udevice *pmic, unsigned int ldo, u8 value) -{

• int err;
• if (ldo > 11)

• return -EINVAL;
  

• err = as3722_write(pmic, AS3722_LDO_VOLTAGE(ldo), value);
• if (err < 0) {

• ret = pmic_reg_write(dev, AS3722_LDO_VOLTAGE(ldo), value);
• if (ret < 0) { error("failed to write LDO%u voltage register: %d",

ldo,

•       err);
  

• return err;
  

•       ret);
  

• return ret;
  

  }

  return 0;

}

-int as3722_gpio_configure(struct udevice *pmic, unsigned int gpio,

• 	  unsigned long flags)
  

+static int as3722_probe(struct udevice *dev) {

• u8 value = 0;
• int err;

• uint id, revision;
• int ret;

• if (flags & AS3722_GPIO_OUTPUT_VDDH)

• value |= AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
  

• if (flags & AS3722_GPIO_INVERT)

• value |= AS3722_GPIO_CONTROL_INVERT;
  

• err = as3722_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
• if (err) {

• error("failed to configure GPIO#%u: %d", gpio, err);
  

• return err;
  

• ret = as3722_read_id(dev, &id, &revision);
• if (ret < 0) {

• error("failed to read ID: %d", ret);
  

• return ret;
  

  }

• return 0;

-}

-static int as3722_gpio_set(struct udevice *pmic, unsigned int gpio,

• 	   unsigned int level)
  

-{

• const char *l;
• u8 value;
• int err;
• if (gpio > 7)

• return -EINVAL;
  

• err = as3722_read(pmic, AS3722_GPIO_SIGNAL_OUT, &value);
• if (err < 0) {

• error("failed to read GPIO signal out register: %d",
  

err);

• return err;
  

• }
• if (level == 0) {

• value &= ~(1 << gpio);
  

• l = "low";
  

• } else {

• value |= 1 << gpio;
  

• l = "high";
  

• if (id != AS3722_DEVICE_ID) {

• error("unknown device");
  

• return -ENOENT;
  

  }

• err = as3722_write(pmic, AS3722_GPIO_SIGNAL_OUT, value);
• if (err) {

• error("failed to set GPIO#%u %s: %d", gpio, l, err);
  

• return err;
  

• }

• debug("AS3722 revision %#x found on I2C bus %s\n", revision,

dev->name); return 0; }

-int as3722_gpio_direction_output(struct udevice *pmic, unsigned int gpio,

• 		 unsigned int level)
  

-{

• u8 value;
• int err;
• if (gpio > 7)

• return -EINVAL;
  

+#if CONFIG_IS_ENABLED(PMIC_CHILDREN) +static const struct pmic_child_info pmic_children_info[] = {

• { .prefix = "sd", .driver = "as3722_stepdown"},
• { .prefix = "ldo", .driver = "as3722_ldo"},
• { },

+};

• if (level == 0)

• value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL;
  

• else

• value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
  

+static int as3722_bind(struct udevice *dev) +{

• struct udevice *gpio_dev;
• ofnode regulators_node;
• int children;
• int ret;

• err = as3722_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
• if (err) {

• error("failed to configure GPIO#%u as output: %d",
  

gpio, err);

• return err;
  

• regulators_node = dev_read_subnode(dev, "regulators");
• if (!ofnode_valid(regulators_node)) {

• debug("%s: %s regulators subnode not found\n",
  

__func__,

•       dev->name);
  

• return -ENXIO;
  

  }

• err = as3722_gpio_set(pmic, gpio, level);
• if (err < 0) {

• error("failed to set GPIO#%u high: %d", gpio, err);
  

• return err;
  

• children = pmic_bind_children(dev, regulators_node,

pmic_children_info);

• if (!children)

• debug("%s: %s - no child found\n", __func__,
  

dev->name);

• ret = device_bind_driver(dev, "gpio_as3722", "gpio_as3722",

&gpio_dev);

• if (ret) {

• debug("%s: Cannot bind GPIOs (ret=%d)\n", __func__,
  

ret);

• return ret;
  

  }

  return 0;

} +#endif

-/* Temporary function until we get the pmic framework */ -int as3722_get(struct udevice **devp) +static int as3722_reg_count(struct udevice *dev) {

• int bus = 0;
• int address = 0x40;
• return i2c_get_chip_for_busnum(bus, address, 1, devp);

• return AS3722_NUM_OF_REGS;

}

-int as3722_init(struct udevice **devp) -{

• struct udevice *pmic;
• u8 id, revision;
• const unsigned int bus = 0;
• const unsigned int address = 0x40;
• int err;
• err = i2c_get_chip_for_busnum(bus, address, 1, &pmic);
• if (err)

• return err;
  

• err = as3722_read_id(pmic, &id, &revision);
• if (err < 0) {

• error("failed to read ID: %d", err);
  

• return err;
  

• }
• if (id != AS3722_DEVICE_ID) {

• error("unknown device");
  

• return -ENOENT;
  

• }
• debug("AS3722 revision %#x found on I2C bus %u, address

%#x\n",

•      revision, bus, address);
  

• if (devp)

• *devp = pmic;
  

• return 0;

-} +static struct dm_pmic_ops as3722_ops = {

• .reg_count = as3722_reg_count,
• .read = as3722_read,
• .write = as3722_write,

+};

+static const struct udevice_id as3722_ids[] = {

• { .compatible = "ams,as3722" },
• { }

+};

+U_BOOT_DRIVER(pmic_as3722) = {

• .name = "as3722_pmic",
• .id = UCLASS_PMIC,
• .of_match = as3722_ids,

+#if CONFIG_IS_ENABLED(PMIC_CHILDREN)

• .bind = as3722_bind,

+#endif

• .probe = as3722_probe,
• .ops = &as3722_ops,

+}; diff --git a/include/power/as3722.h b/include/power/as3722.h index 713e79840f..491f1b7ea7 100644 --- a/include/power/as3722.h +++ b/include/power/as3722.h @@ -7,8 +7,6 @@ #ifndef __POWER_AS3722_H__ #define __POWER_AS3722_H__

-#include <asm/types.h>

#define AS3722_GPIO_OUTPUT_VDDH (1 << 0) #define AS3722_GPIO_INVERT (1 << 1)

@@ -21,23 +19,9 @@ #define AS3722_ASIC_ID2 0x91

#define AS3722_GPIO_CONTROL(n) (0x08 + (n)) +#define AS3722_GPIO_SIGNAL_OUT 0x20 #define AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH (1 << 0) #define AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL (7 << 0) #define AS3722_GPIO_CONTROL_INVERT (1 << 7)

-struct udevice;

-int as3722_init(struct udevice **devp); -int as3722_sd_enable(struct udevice *pmic, unsigned int sd); -int as3722_sd_set_voltage(struct udevice *pmic, unsigned int sd, u8 value); -int as3722_ldo_enable(struct udevice *pmic, unsigned int ldo); -int as3722_ldo_set_voltage(struct udevice *pmic, unsigned int ldo, u8 value); -int as3722_gpio_configure(struct udevice *pmic, unsigned int gpio,

• 	  unsigned long flags);
  

-int as3722_gpio_direction_output(struct udevice *pmic, unsigned int gpio,

• 		 unsigned int level);
  

-int as3722_read(struct udevice *pmic, u8 reg, u8 *value); -int as3722_write(struct udevice *pmic, u8 reg, u8 value); -int as3722_get(struct udevice **devp);

#endif /* __POWER_AS3722_H__ */

Best regards,

Lukasz Majewski

--

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