[U-Boot] [PATCH 20/26] dm: power: Convert as3722 to driver model
Lukasz Majewski
lukma at denx.de
Sat May 20 23:41:10 UTC 2017
On Fri, 19 May 2017 08:31:03 -0600
Simon Glass <sjg at 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 at denx.de>
>
> Signed-off-by: Simon Glass <sjg at 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 at 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
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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