[U-Boot] [PATCH V3 4/6] power: pmic: pfuze100 support driver model

[Przemyslaw Marczak <p.marczak@samsung.com>]

Hello,

On 08/07/2015 10:43 AM, Peng Fan wrote:
> 1. Support driver model for pfuze100.
> 2. Introduce a new Kconfig entry DM_PMIC_PFUZE100 for pfuze100
> 3. This driver intends to support PF100, PF200 and PF3000, so add
>     the device id into the udevice_id array.
> 4. Rename PMIC_NUM_OF_REGS macro to PFUZE100_NUM_OF_REGS.
>
> Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
> Cc: Przemyslaw Marczak <p.marczak@samsung.com>
> Cc: Simon Glass <sjg@chromium.org>
> Reviewed-by: Simon Glass <sjg@chromium.org>
> ---
>
> Changes v3:
>   Addressed Przemyslaw's comments:
>   Keep the original driver.
>   Use CONFIG_DM_PMIC_PFUZE100 in Makefile to cover the new driver.
>   Discard the type cast for driver data.
>
> Changes v2:
>   Addressed Przemyslaw's comments:
>    Rename PMIC_NUM_OF_REGS to PFUZE100_NUM_OF_REGS
>    Sort variables' order
>    Define PFUZE100_REGULATOR_DRIVER for "pfuze100_regulator" in header file.
>
>   drivers/power/pmic/Kconfig    |  7 ++++
>   drivers/power/pmic/Makefile   |  1 +
>   drivers/power/pmic/pfuze100.c | 96 +++++++++++++++++++++++++++++++++++++++++++
>   include/power/pfuze100_pmic.h |  7 +++-
>   4 files changed, 110 insertions(+), 1 deletion(-)
>   create mode 100644 drivers/power/pmic/pfuze100.c
>
> diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
> index 164f421..0df91be 100644
> --- a/drivers/power/pmic/Kconfig
> +++ b/drivers/power/pmic/Kconfig
> @@ -10,6 +10,13 @@ config DM_PMIC
>   	- 'drivers/power/pmic/pmic-uclass.c'
>   	- 'include/power/pmic.h'
>
> +config DM_PMIC_PFUZE100
> +	bool "Enable Driver Model for PMIC PFUZE100"
> +	depends on DM_PMIC
> +	---help---
> +	This config enables implementation of driver-model pmic uclass features
> +	for PMIC PFUZE100. The driver implements read/write operations.
> +
>   config DM_PMIC_MAX77686
>   	bool "Enable Driver Model for PMIC MAX77686"
>   	depends on DM_PMIC
> diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
> index 8c1ce3d..f49b236 100644
> --- a/drivers/power/pmic/Makefile
> +++ b/drivers/power/pmic/Makefile
> @@ -7,6 +7,7 @@
>
>   obj-$(CONFIG_DM_PMIC) += pmic-uclass.o
>   obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
> +obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze100.o
>   obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
>   obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
>   obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
> diff --git a/drivers/power/pmic/pfuze100.c b/drivers/power/pmic/pfuze100.c
> new file mode 100644
> index 0000000..3beb48e
> --- /dev/null
> +++ b/drivers/power/pmic/pfuze100.c
> @@ -0,0 +1,96 @@
> +/*
> + * Copyright (C) 2015 Freescale Semiconductor, Inc
> + * Peng Fan <Peng.Fan@freescale.com>
> + *
> + * SPDX-License-Identifier:      GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <fdtdec.h>
> +#include <errno.h>
> +#include <dm.h>
> +#include <i2c.h>
> +#include <power/pmic.h>
> +#include <power/regulator.h>
> +#include <power/pfuze100_pmic.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +static const struct pmic_child_info pmic_children_info[] = {
> +	/* sw[x], swbst */
> +	{ .prefix = "s", .driver = PFUZE100_REGULATOR_DRIVER },
> +	/* vgen[x], vsnvs, vcc, v33, vcc_sd */
> +	{ .prefix = "v", .driver = PFUZE100_REGULATOR_DRIVER },
> +	{ },
> +};
> +
> +static int pfuze100_reg_count(struct udevice *dev)
> +{
> +	return PFUZE100_NUM_OF_REGS;
> +}
> +
> +static int pfuze100_write(struct udevice *dev, uint reg, const uint8_t *buff,
> +			  int len)
> +{
> +	if (dm_i2c_write(dev, reg, buff, len)) {
> +		error("write error to device: %p register: %#x!", dev, reg);
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int pfuze100_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
> +{
> +	if (dm_i2c_read(dev, reg, buff, len)) {
> +		error("read error from device: %p register: %#x!", dev, reg);
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int pfuze100_bind(struct udevice *dev)
> +{
> +	int children;
> +	int regulators_node;
> +	const void *blob = gd->fdt_blob;
> +
> +	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
> +					     "regulators");
> +	if (regulators_node <= 0) {
> +		debug("%s: %s regulators subnode not found!", __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 pfuze100_ops = {
> +	.reg_count = pfuze100_reg_count,
> +	.read = pfuze100_read,
> +	.write = pfuze100_write,
> +};
> +
> +static const struct udevice_id pfuze100_ids[] = {
> +	{ .compatible = "fsl,pfuze100", .data = PFUZE100, },
> +	{ .compatible = "fsl,pfuze200", .data = PFUZE200, },
> +	{ .compatible = "fsl,pfuze3000", .data = PFUZE3000, },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(pmic_pfuze100) = {
> +	.name = "pfuze100 pmic",
> +	.id = UCLASS_PMIC,
> +	.of_match = pfuze100_ids,
> +	.bind = pfuze100_bind,
> +	.ops = &pfuze100_ops,
> +};
> diff --git a/include/power/pfuze100_pmic.h b/include/power/pfuze100_pmic.h
> index cb10605..c40a976 100644
> --- a/include/power/pfuze100_pmic.h
> +++ b/include/power/pfuze100_pmic.h
> @@ -8,6 +8,11 @@
>   #ifndef __PFUZE100_PMIC_H_
>   #define __PFUZE100_PMIC_H_
>
> +/* Device ID */
> +enum {PFUZE100 = 0x10, PFUZE200 = 0x11, PFUZE3000 = 0x30};
> +
> +#define PFUZE100_REGULATOR_DRIVER	"pfuze100_regulator"
> +
>   /* PFUZE100 registers */
>   enum {
>   	PFUZE100_DEVICEID	= 0x00,
> @@ -54,7 +59,7 @@ enum {
>   	PFUZE100_VGEN5VOL	= 0x70,
>   	PFUZE100_VGEN6VOL	= 0x71,
>
> -	PMIC_NUM_OF_REGS	= 0x7f,
> +	PFUZE100_NUM_OF_REGS	= 0x7f,
>   };
>
>   /*
>

Applied to: u-boot-pmic.

Best regards,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com