[PATCH 2/3] power: pmic: Provide DM_PMIC support for tps65217 driver

[Jaehoon Chung]

On 2/22/22 17:03, Lukasz Majewski wrote:
> The tps65217 PMIC driver is used with am335x SoC based designs.
> 
> It is used in the SPL (MLO) as well, so the DM conversion only is
> for u-boot proper.
> 
> This driver only allows simple reading/writing/dumping of the content
> of its registers and requires the DM_I2C for proper operation.
> 
> Moreover, new CONFIG_PMIC_TPS65217 has been introduced in Kconfig
> to be used with boards, which both support DM_PMIC and DM_I2C.
> 
> Signed-off-by: Lukasz Majewski <lukma at denx.de>


Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>

Best Regards,
Jaehoon Chung

> ---
> 
>  drivers/power/pmic/Kconfig         |  8 +++
>  drivers/power/pmic/pmic_tps65217.c | 82 ++++++++++++++++++++++++++++++
>  2 files changed, 90 insertions(+)
> 
> diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
> index ce0adb18a4..c7739228da 100644
> --- a/drivers/power/pmic/Kconfig
> +++ b/drivers/power/pmic/Kconfig
> @@ -306,6 +306,14 @@ config PMIC_TPS65090
>  	only, and you can enable the regulator/charger drivers separately if
>  	required.
>  
> +config PMIC_TPS65217
> +	bool "Enable driver for Texas Instruments TPS65217 PMIC"
> +	---help---
> +	The TPS65217 is a PMIC containing several LDOs, DC to DC convertors,
> +	FETs and a battery charger. This driver provides register access
> +	only, and you can enable the regulator/charger drivers separately if
> +	required.
> +
>  config PMIC_PALMAS
>  	bool "Enable driver for Texas Instruments PALMAS PMIC"
>  	---help---
> diff --git a/drivers/power/pmic/pmic_tps65217.c b/drivers/power/pmic/pmic_tps65217.c
> index c7f532df4d..ccbf223593 100644
> --- a/drivers/power/pmic/pmic_tps65217.c
> +++ b/drivers/power/pmic/pmic_tps65217.c
> @@ -6,8 +6,13 @@
>  
>  #include <common.h>
>  #include <i2c.h>
> +#include <dm.h>
> +#include <errno.h>
> +#include <fdtdec.h>
> +#include <power/pmic.h>
>  #include <power/tps65217.h>
>  
> +#if !CONFIG_IS_ENABLED(DM_PMIC)
>  struct udevice *tps65217_dev __section(".data") = NULL;
>  
>  /**
> @@ -148,3 +153,80 @@ int power_tps65217_init(unsigned char bus)
>  #endif
>  	return 0;
>  }
> +#else /* CONFIG_IS_ENABLED(DM_PMIC) */
> +static const struct pmic_child_info pmic_children_info[] = {
> +	{ .prefix = "ldo", .driver = "tps65217_ldo" },
> +	{ },
> +};
> +
> +static int tps65217_reg_count(struct udevice *dev)
> +{
> +	return TPS65217_PMIC_NUM_OF_REGS;
> +}
> +
> +static int tps65217_write(struct udevice *dev, uint reg, const uint8_t *buff,
> +			  int len)
> +{
> +	if (dm_i2c_write(dev, reg, buff, len)) {
> +		pr_err("write error to device: %p register: %#x!\n", dev, reg);
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int tps65217_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
> +{
> +	int ret;
> +
> +	ret = dm_i2c_read(dev, reg, buff, len);
> +	if (ret) {
> +		pr_err("read error %d from device: %p register: %#x!\n", ret,
> +		       dev, reg);
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int tps65217_bind(struct udevice *dev)
> +{
> +	ofnode regulators_node;
> +	int children;
> +
> +	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;
> +	}
> +
> +	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
> +
> +	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
> +	if (!children)
> +		debug("%s: %s - no child found\n", __func__, dev->name);
> +
> +	/* Always return success for this device */
> +	return 0;
> +}
> +
> +static struct dm_pmic_ops tps65217_ops = {
> +	.reg_count = tps65217_reg_count,
> +	.read = tps65217_read,
> +	.write = tps65217_write,
> +};
> +
> +static const struct udevice_id tps65217_ids[] = {
> +	{ .compatible = "ti,tps65217" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(pmic_tps65217) = {
> +	.name = "tps65217 pmic",
> +	.id = UCLASS_PMIC,
> +	.of_match = tps65217_ids,
> +	.bind = tps65217_bind,
> +	.ops = &tps65217_ops,
> +};
> +#endif