[U-Boot] [PATCH v5 1/2] drivers/reset: support rockchip reset drivers
From: Elaine Zhang zhangqing@rock-chips.com
Create driver to support all Rockchip SoCs soft reset. Example of usage: i2c driver: ret = reset_get_by_name(dev, "i2c", &reset_ctl); if (ret) { error("reset_get_by_name() failed: %d\n", ret); }
reset_assert(&reset_ctl); udelay(50); reset_deassert(&reset_ctl);
i2c dts node: resets = <&cru SRST_P_I2C1>, <&cru SRST_I2C1>; reset-names = "p_i2c", "i2c";
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com ---
Changes in v5: - make rockchip reset driver depends on ARCH_ROCKCHIP
Changes in v4: None Changes in v3: None Changes in v2: - fix Kconfig more than 80 length - use MACRO for reset bits in one reg - use rkclr/set_reg for reg access - add rockchip_reset_bind() - use dev_read_addr_size() instead of fdtdec_
drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-rockchip.c | 133 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-rockchip.c
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index ce46e27..3964b9e 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -74,4 +74,13 @@ config AST2500_RESET resets that are supported by watchdog. The main limitation though is that some reset signals, like I2C or MISC reset multiple devices.
+config RESET_ROCKCHIP + bool "Reset controller driver for Rockchip SoCs" + depends on DM_RESET && ARCH_ROCKCHIP && CLK + default y + help + Support for reset controller on rockchip SoC. The main limitation + though is that some reset signals, like I2C or MISC reset multiple + devices. + endmenu diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 252cefe..7d7e080 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -12,3 +12,4 @@ obj-$(CONFIG_TEGRA186_RESET) += tegra186-reset.o obj-$(CONFIG_RESET_BCM6345) += reset-bcm6345.o obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o obj-$(CONFIG_AST2500_RESET) += ast2500-reset.o +obj-$(CONFIG_RESET_ROCKCHIP) += reset-rockchip.o diff --git a/drivers/reset/reset-rockchip.c b/drivers/reset/reset-rockchip.c new file mode 100644 index 0000000..01047a2 --- /dev/null +++ b/drivers/reset/reset-rockchip.c @@ -0,0 +1,133 @@ +/* + * (C) Copyright 2017 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <dm.h> +#include <reset-uclass.h> +#include <linux/io.h> +#include <asm/arch/hardware.h> +#include <dm/lists.h> +/* + * Each reg has 16 bits reset signal for devices + * Note: Not including rk2818 and older SoCs + */ +#define ROCKCHIP_RESET_NUM_IN_REG 16 + +struct rockchip_reset_priv { + void __iomem *base; + /* Rockchip reset reg locate at cru controller */ + u32 reset_reg_offset; + /* Rockchip reset reg number */ + u32 reset_reg_num; +}; + +static int rockchip_reset_request(struct reset_ctl *reset_ctl) +{ + struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev); + + debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_num=%d)\n", __func__, + reset_ctl, reset_ctl->dev, reset_ctl->id, priv->reset_reg_num); + + if (reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG >= priv->reset_reg_num) + return -EINVAL; + + return 0; +} + +static int rockchip_reset_free(struct reset_ctl *reset_ctl) +{ + debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl, + reset_ctl->dev, reset_ctl->id); + + return 0; +} + +static int rockchip_reset_assert(struct reset_ctl *reset_ctl) +{ + struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev); + int bank = reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG; + int offset = reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG; + + debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__, + reset_ctl, reset_ctl->dev, reset_ctl->id, + priv->base + (bank * 4)); + + rk_setreg(priv->base + (bank * 4), BIT(offset)); + + return 0; +} + +static int rockchip_reset_deassert(struct reset_ctl *reset_ctl) +{ + struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev); + int bank = reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG; + int offset = reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG; + + debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__, + reset_ctl, reset_ctl->dev, reset_ctl->id, + priv->base + (bank * 4)); + + rk_clrreg(priv->base + (bank * 4), BIT(offset)); + + return 0; +} + +struct reset_ops rockchip_reset_ops = { + .request = rockchip_reset_request, + .free = rockchip_reset_free, + .rst_assert = rockchip_reset_assert, + .rst_deassert = rockchip_reset_deassert, +}; + +static int rockchip_reset_probe(struct udevice *dev) +{ + struct rockchip_reset_priv *priv = dev_get_priv(dev); + fdt_addr_t addr; + fdt_size_t size; + + addr = dev_read_addr_size(dev, "reg", &size); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + if ((priv->reset_reg_offset == 0) && (priv->reset_reg_num == 0)) + return -EINVAL; + + addr += priv->reset_reg_offset; + priv->base = ioremap(addr, size); + + debug("%s(base=%p) (reg_offset=%x, reg_num=%d)\n", __func__, + priv->base, priv->reset_reg_offset, priv->reset_reg_num); + + return 0; +} + +int rockchip_reset_bind(struct udevice *pdev, u32 reg_offset, u32 reg_number) +{ + struct udevice *rst_dev; + struct rockchip_reset_priv *priv; + int ret; + + ret = device_bind_driver_to_node(pdev, "rockchip_reset", "reset", + dev_ofnode(pdev), &rst_dev); + if (ret) { + debug("Warning: No rockchip reset driver: ret=%d\n", ret); + return ret; + } + priv = malloc(sizeof(struct rockchip_reset_priv)); + priv->reset_reg_offset = reg_offset; + priv->reset_reg_num = reg_number; + rst_dev->priv = priv; + + return 0; +} + +U_BOOT_DRIVER(rockchip_reset) = { + .name = "rockchip_reset", + .id = UCLASS_RESET, + .probe = rockchip_reset_probe, + .ops = &rockchip_reset_ops, + .priv_auto_alloc_size = sizeof(struct rockchip_reset_priv), +};
From: Elaine Zhang zhangqing@rock-chips.com
Bind rockchip reset to clock-controller with rockchip_reset_bind().
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com ---
Changes in v5: None Changes in v4: - fix compile error if CONFIG_RESET_ROCKCHIP not defined
Changes in v3: - add missing offset for rk3399 pmuclk bind
Changes in v2: - use rockchip_reset_bind() to bind reset driver.
arch/arm/include/asm/arch-rockchip/clock.h | 10 ++++++++++ drivers/clk/rockchip/clk_rk3036.c | 7 +++++++ drivers/clk/rockchip/clk_rk3188.c | 7 +++++++ drivers/clk/rockchip/clk_rk322x.c | 7 +++++++ drivers/clk/rockchip/clk_rk3288.c | 7 +++++++ drivers/clk/rockchip/clk_rk3328.c | 7 +++++++ drivers/clk/rockchip/clk_rk3368.c | 7 +++++++ drivers/clk/rockchip/clk_rk3399.c | 21 +++++++++++++++++++++ drivers/clk/rockchip/clk_rv1108.c | 7 +++++++ 9 files changed, 80 insertions(+)
diff --git a/arch/arm/include/asm/arch-rockchip/clock.h b/arch/arm/include/asm/arch-rockchip/clock.h index 736b260..5264111 100644 --- a/arch/arm/include/asm/arch-rockchip/clock.h +++ b/arch/arm/include/asm/arch-rockchip/clock.h @@ -85,4 +85,14 @@ void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf);
int rockchip_get_clk(struct udevice **devp);
+/* + * rockchip_reset_bind() - Bind soft reset device as child of clock device + * + * @pdev: clock udevice + * @reg_offset: the first offset in cru for softreset registers + * @reg_number: the reg numbers of softreset registers + * @return 0 success, or error value + */ +int rockchip_reset_bind(struct udevice *pdev, u32 reg_offset, u32 reg_number); + #endif diff --git a/drivers/clk/rockchip/clk_rk3036.c b/drivers/clk/rockchip/clk_rk3036.c index 280ebb9..510a00a 100644 --- a/drivers/clk/rockchip/clk_rk3036.c +++ b/drivers/clk/rockchip/clk_rk3036.c @@ -347,6 +347,13 @@ static int rk3036_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3036_cru, cru_softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 9); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; }
diff --git a/drivers/clk/rockchip/clk_rk3188.c b/drivers/clk/rockchip/clk_rk3188.c index fca6899..6451c95 100644 --- a/drivers/clk/rockchip/clk_rk3188.c +++ b/drivers/clk/rockchip/clk_rk3188.c @@ -590,6 +590,13 @@ static int rk3188_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3188_cru, cru_softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 9); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; }
diff --git a/drivers/clk/rockchip/clk_rk322x.c b/drivers/clk/rockchip/clk_rk322x.c index ff52b55..c8a2413 100644 --- a/drivers/clk/rockchip/clk_rk322x.c +++ b/drivers/clk/rockchip/clk_rk322x.c @@ -402,6 +402,13 @@ static int rk322x_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk322x_cru, cru_softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 9); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; }
diff --git a/drivers/clk/rockchip/clk_rk3288.c b/drivers/clk/rockchip/clk_rk3288.c index ac53239..b64c107 100644 --- a/drivers/clk/rockchip/clk_rk3288.c +++ b/drivers/clk/rockchip/clk_rk3288.c @@ -876,6 +876,13 @@ static int rk3288_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3288_cru, cru_softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 12); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; }
diff --git a/drivers/clk/rockchip/clk_rk3328.c b/drivers/clk/rockchip/clk_rk3328.c index 4d522a7..fa0c777 100644 --- a/drivers/clk/rockchip/clk_rk3328.c +++ b/drivers/clk/rockchip/clk_rk3328.c @@ -614,6 +614,13 @@ static int rk3328_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3328_cru, softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 12); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return ret; }
diff --git a/drivers/clk/rockchip/clk_rk3368.c b/drivers/clk/rockchip/clk_rk3368.c index bfeef39..a831991 100644 --- a/drivers/clk/rockchip/clk_rk3368.c +++ b/drivers/clk/rockchip/clk_rk3368.c @@ -543,6 +543,13 @@ static int rk3368_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3368_cru, softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 15); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return ret; }
diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c index 2e85ac7..2f4c4e3 100644 --- a/drivers/clk/rockchip/clk_rk3399.c +++ b/drivers/clk/rockchip/clk_rk3399.c @@ -1046,6 +1046,13 @@ static int rk3399_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3399_cru, softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 21); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; }
@@ -1221,6 +1228,19 @@ static int rk3399_pmuclk_ofdata_to_platdata(struct udevice *dev) return 0; }
+static int rk3399_pmuclk_bind(struct udevice *dev) +{ +#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + int ret; + + ret = offsetof(struct rk3399_pmucru, pmucru_softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 2); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; +} + static const struct udevice_id rk3399_pmuclk_ids[] = { { .compatible = "rockchip,rk3399-pmucru" }, { } @@ -1234,6 +1254,7 @@ U_BOOT_DRIVER(rockchip_rk3399_pmuclk) = { .ofdata_to_platdata = rk3399_pmuclk_ofdata_to_platdata, .ops = &rk3399_pmuclk_ops, .probe = rk3399_pmuclk_probe, + .bind = rk3399_pmuclk_bind, #if CONFIG_IS_ENABLED(OF_PLATDATA) .platdata_auto_alloc_size = sizeof(struct rk3399_pmuclk_plat), #endif diff --git a/drivers/clk/rockchip/clk_rv1108.c b/drivers/clk/rockchip/clk_rv1108.c index a119548..224c813 100644 --- a/drivers/clk/rockchip/clk_rv1108.c +++ b/drivers/clk/rockchip/clk_rv1108.c @@ -240,6 +240,13 @@ static int rv1108_clk_bind(struct udevice *dev) sys_child->priv = priv; }
+#if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) + ret = offsetof(struct rk3368_cru, softrst_con[0]); + ret = rockchip_reset_bind(dev, ret, 13); + if (ret) + debug("Warning: software reset driver bind faile\n"); +#endif + return 0; }
From: Elaine Zhang zhangqing@rock-chips.com
Bind rockchip reset to clock-controller with rockchip_reset_bind().
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com
Changes in v5: None Changes in v4:
- fix compile error if CONFIG_RESET_ROCKCHIP not defined
Changes in v3:
- add missing offset for rk3399 pmuclk bind
Changes in v2:
- use rockchip_reset_bind() to bind reset driver.
arch/arm/include/asm/arch-rockchip/clock.h | 10 ++++++++++ drivers/clk/rockchip/clk_rk3036.c | 7 +++++++ drivers/clk/rockchip/clk_rk3188.c | 7 +++++++ drivers/clk/rockchip/clk_rk322x.c | 7 +++++++ drivers/clk/rockchip/clk_rk3288.c | 7 +++++++ drivers/clk/rockchip/clk_rk3328.c | 7 +++++++ drivers/clk/rockchip/clk_rk3368.c | 7 +++++++ drivers/clk/rockchip/clk_rk3399.c | 21 +++++++++++++++++++++ drivers/clk/rockchip/clk_rv1108.c | 7 +++++++ 9 files changed, 80 insertions(+)
Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
From: Elaine Zhang zhangqing@rock-chips.com
Bind rockchip reset to clock-controller with rockchip_reset_bind().
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v5: None Changes in v4:
- fix compile error if CONFIG_RESET_ROCKCHIP not defined
Changes in v3:
- add missing offset for rk3399 pmuclk bind
Changes in v2:
- use rockchip_reset_bind() to bind reset driver.
arch/arm/include/asm/arch-rockchip/clock.h | 10 ++++++++++ drivers/clk/rockchip/clk_rk3036.c | 7 +++++++ drivers/clk/rockchip/clk_rk3188.c | 7 +++++++ drivers/clk/rockchip/clk_rk322x.c | 7 +++++++ drivers/clk/rockchip/clk_rk3288.c | 7 +++++++ drivers/clk/rockchip/clk_rk3328.c | 7 +++++++ drivers/clk/rockchip/clk_rk3368.c | 7 +++++++ drivers/clk/rockchip/clk_rk3399.c | 21 +++++++++++++++++++++ drivers/clk/rockchip/clk_rv1108.c | 7 +++++++ 9 files changed, 80 insertions(+)
Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
From: Elaine Zhang zhangqing@rock-chips.com
Bind rockchip reset to clock-controller with rockchip_reset_bind().
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v5: None Changes in v4:
- fix compile error if CONFIG_RESET_ROCKCHIP not defined
Changes in v3:
- add missing offset for rk3399 pmuclk bind
Changes in v2:
- use rockchip_reset_bind() to bind reset driver.
arch/arm/include/asm/arch-rockchip/clock.h | 10 ++++++++++ drivers/clk/rockchip/clk_rk3036.c | 7 +++++++ drivers/clk/rockchip/clk_rk3188.c | 7 +++++++ drivers/clk/rockchip/clk_rk322x.c | 7 +++++++ drivers/clk/rockchip/clk_rk3288.c | 7 +++++++ drivers/clk/rockchip/clk_rk3328.c | 7 +++++++ drivers/clk/rockchip/clk_rk3368.c | 7 +++++++ drivers/clk/rockchip/clk_rk3399.c | 21 +++++++++++++++++++++ drivers/clk/rockchip/clk_rv1108.c | 7 +++++++ 9 files changed, 80 insertions(+)
Applied to u-boot-rockchip/next, thanks!
From: Elaine Zhang zhangqing@rock-chips.com
Bind rockchip reset to clock-controller with rockchip_reset_bind().
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v5: None Changes in v4:
- fix compile error if CONFIG_RESET_ROCKCHIP not defined
Changes in v3:
- add missing offset for rk3399 pmuclk bind
Changes in v2:
- use rockchip_reset_bind() to bind reset driver.
arch/arm/include/asm/arch-rockchip/clock.h | 10 ++++++++++ drivers/clk/rockchip/clk_rk3036.c | 7 +++++++ drivers/clk/rockchip/clk_rk3188.c | 7 +++++++ drivers/clk/rockchip/clk_rk322x.c | 7 +++++++ drivers/clk/rockchip/clk_rk3288.c | 7 +++++++ drivers/clk/rockchip/clk_rk3328.c | 7 +++++++ drivers/clk/rockchip/clk_rk3368.c | 7 +++++++ drivers/clk/rockchip/clk_rk3399.c | 21 +++++++++++++++++++++ drivers/clk/rockchip/clk_rv1108.c | 7 +++++++ 9 files changed, 80 insertions(+)
Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
From: Elaine Zhang zhangqing@rock-chips.com
Create driver to support all Rockchip SoCs soft reset. Example of usage: i2c driver: ret = reset_get_by_name(dev, "i2c", &reset_ctl); if (ret) { error("reset_get_by_name() failed: %d\n", ret); }
reset_assert(&reset_ctl); udelay(50); reset_deassert(&reset_ctl);
i2c dts node: resets = <&cru SRST_P_I2C1>, <&cru SRST_I2C1>; reset-names = "p_i2c", "i2c";
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com
Changes in v5:
- make rockchip reset driver depends on ARCH_ROCKCHIP
Changes in v4: None Changes in v3: None Changes in v2:
- fix Kconfig more than 80 length
- use MACRO for reset bits in one reg
- use rkclr/set_reg for reg access
- add rockchip_reset_bind()
- use dev_read_addr_size() instead of fdtdec_
drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-rockchip.c | 133 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-rockchip.c
Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
From: Elaine Zhang zhangqing@rock-chips.com
Create driver to support all Rockchip SoCs soft reset. Example of usage: i2c driver: ret = reset_get_by_name(dev, "i2c", &reset_ctl); if (ret) { error("reset_get_by_name() failed: %d\n", ret); }
reset_assert(&reset_ctl); udelay(50); reset_deassert(&reset_ctl);
i2c dts node: resets = <&cru SRST_P_I2C1>, <&cru SRST_I2C1>; reset-names = "p_i2c", "i2c";
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v5:
- make rockchip reset driver depends on ARCH_ROCKCHIP
Changes in v4: None Changes in v3: None Changes in v2:
- fix Kconfig more than 80 length
- use MACRO for reset bits in one reg
- use rkclr/set_reg for reg access
- add rockchip_reset_bind()
- use dev_read_addr_size() instead of fdtdec_
drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-rockchip.c | 133 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-rockchip.c
Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
From: Elaine Zhang zhangqing@rock-chips.com
Create driver to support all Rockchip SoCs soft reset. Example of usage: i2c driver: ret = reset_get_by_name(dev, "i2c", &reset_ctl); if (ret) { error("reset_get_by_name() failed: %d\n", ret); }
reset_assert(&reset_ctl); udelay(50); reset_deassert(&reset_ctl);
i2c dts node: resets = <&cru SRST_P_I2C1>, <&cru SRST_I2C1>; reset-names = "p_i2c", "i2c";
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v5:
- make rockchip reset driver depends on ARCH_ROCKCHIP
Changes in v4: None Changes in v3: None Changes in v2:
- fix Kconfig more than 80 length
- use MACRO for reset bits in one reg
- use rkclr/set_reg for reg access
- add rockchip_reset_bind()
- use dev_read_addr_size() instead of fdtdec_
drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-rockchip.c | 133 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-rockchip.c
Applied to u-boot-rockchip/next, thanks!
From: Elaine Zhang zhangqing@rock-chips.com
Create driver to support all Rockchip SoCs soft reset. Example of usage: i2c driver: ret = reset_get_by_name(dev, "i2c", &reset_ctl); if (ret) { error("reset_get_by_name() failed: %d\n", ret); }
reset_assert(&reset_ctl); udelay(50); reset_deassert(&reset_ctl);
i2c dts node: resets = <&cru SRST_P_I2C1>, <&cru SRST_I2C1>; reset-names = "p_i2c", "i2c";
Signed-off-by: Elaine Zhang zhangqing@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v5:
- make rockchip reset driver depends on ARCH_ROCKCHIP
Changes in v4: None Changes in v3: None Changes in v2:
- fix Kconfig more than 80 length
- use MACRO for reset bits in one reg
- use rkclr/set_reg for reg access
- add rockchip_reset_bind()
- use dev_read_addr_size() instead of fdtdec_
drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-rockchip.c | 133 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-rockchip.c
Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
participants (2)
-
Kever Yang -
Philipp Tomsich