[PATCH 11/12] ARM: ux500: Use the GPIO regulator framework for SDI0's 'en' and 'vsel'

[Ulf Hansson]

On 10 December 2012 09:56, Lee Jones <lee.jones at linaro.org> wrote:
> To prevent lots of unnecessary call-backs into platform code, we're
> now using the GPIO regulator framework to control the 'enable' (en)
> and 'voltage select' (vsel) GPIO pins which in turn control the
> MMCI's secondary regulator settings. This already works with Device
> Tree, but when booting with ATAGs we need to register it as a
> platform device.
>
> Signed-off-by: Lee Jones <lee.jones at linaro.org>
> ---
>  arch/arm/mach-ux500/board-mop500.c |   61 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 61 insertions(+)
>
> diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
> index daa4237..9f9fe7f 100644
> --- a/arch/arm/mach-ux500/board-mop500.c
> +++ b/arch/arm/mach-ux500/board-mop500.c
> @@ -24,6 +24,8 @@
>  #include <linux/mfd/abx500/ab8500.h>
>  #include <linux/regulator/ab8500.h>
>  #include <linux/regulator/fixed.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/gpio-regulator.h>
>  #include <linux/mfd/tc3589x.h>
>  #include <linux/mfd/tps6105x.h>
>  #include <linux/mfd/abx500/ab8500-gpio.h>
> @@ -91,6 +93,54 @@ static struct platform_device snowball_gpio_en_3v3_regulator_dev = {
>         },
>  };
>
> +static struct regulator_consumer_supply sdi0_reg_consumers[] = {
> +        REGULATOR_SUPPLY("vqmmc", NULL),

REGULATOR_SUPPLY("vqmmc", "sdi0"),

> +};
> +
> +static struct regulator_init_data sdi0_reg_init_data = {

The levelshifter uses the ab8500-ext-supply3. Reflect that here.

.supply_regulator = "ab8500-ext-supply3"


> +        .constraints = {
> +                .min_uV         = 1800000,

2.9V, not 3.3V

> +                .max_uV         = 3300000,
> +                .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE|REGULATOR_CHANGE_STATUS,
> +        },
> +        .num_consumer_supplies  = ARRAY_SIZE(sdi0_reg_consumers),
> +        .consumer_supplies      = sdi0_reg_consumers,
> +};
> +
> +/* Dynamically populated. */
> +static struct gpio sdi0_reg_gpios[] = {
> +        { 0, GPIOF_OUT_INIT_LOW, "mmci_vsel" },
> +};
> +
> +static struct gpio_regulator_state sdi0_reg_states[] = {
> +        { .value = 3300000, .gpios = (0 << 0) },

2.9V, not 3.3V

> +        { .value = 1800000, .gpios = (1 << 0) },
> +};
> +
> +static struct gpio_regulator_config sdi0_reg_info = {
> +        .supply_name = "mmci-reg",
> +
> +        .enable_high = 1,
> +        .enabled_at_boot = 0,
> +
> +        .gpios = sdi0_reg_gpios,
> +        .nr_gpios = ARRAY_SIZE(sdi0_reg_gpios),
> +
> +        .states = sdi0_reg_states,
> +        .nr_states = ARRAY_SIZE(sdi0_reg_states),
> +
> +        .type = REGULATOR_VOLTAGE,
> +        .init_data = &sdi0_reg_init_data,
> +};
> +
> +static struct platform_device sdi0_regulator = {
> +        .name = "gpio-regulator",
> +        .id   = -1,
> +        .dev  = {
> +                .platform_data = &sdi0_reg_info,
> +        },
> +};
> +
>  static struct ab8500_gpio_platform_data ab8500_gpio_pdata = {
>         .gpio_base              = MOP500_AB8500_PIN_GPIO(1),
>         .irq_base               = MOP500_AB8500_VIR_GPIO_IRQ_BASE,
> @@ -440,6 +490,7 @@ static struct hash_platform_data u8500_hash1_platform_data = {
>  /* add any platform devices here - TODO */
>  static struct platform_device *mop500_platform_devs[] __initdata = {
>         &mop500_gpio_keys_device,
> +       &sdi0_regulator,
>  };
>
>  #ifdef CONFIG_STE_DMA40
> @@ -581,6 +632,7 @@ static struct platform_device *snowball_platform_devs[] __initdata = {
>         &snowball_key_dev,
>         &snowball_sbnet_dev,
>         &snowball_gpio_en_3v3_regulator_dev,
> +       &sdi0_regulator,
>  };
>
>  static void __init mop500_init_machine(void)
> @@ -591,6 +643,9 @@ static void __init mop500_init_machine(void)
>
>         mop500_gpio_keys[0].gpio = GPIO_PROX_SENSOR;
>
> +       sdi0_reg_info.enable_gpio = GPIO_SDMMC_EN;
> +       sdi0_reg_info.gpios[0].gpio = GPIO_SDMMC_1V8_3V_SEL;
> +
>         mop500_pinmaps_init();
>         parent = u8500_init_devices(&ab8500_platdata);
>
> @@ -623,6 +678,9 @@ static void __init snowball_init_machine(void)
>         struct device *parent = NULL;
>         int i;
>
> +       sdi0_reg_info.enable_gpio = SNOWBALL_SDMMC_EN_GPIO;
> +       sdi0_reg_info.gpios[0].gpio = SNOWBALL_SDMMC_1V8_3V_GPIO;
> +
>         snowball_pinmaps_init();
>         parent = u8500_init_devices(&ab8500_platdata);
>
> @@ -655,6 +713,9 @@ static void __init hrefv60_init_machine(void)
>          */
>         mop500_gpio_keys[0].gpio = HREFV60_PROX_SENSE_GPIO;
>
> +       sdi0_reg_info.enable_gpio = HREFV60_SDMMC_EN_GPIO;
> +       sdi0_reg_info.gpios[0].gpio = HREFV60_SDMMC_1V8_3V_GPIO;
> +
>         hrefv60_pinmaps_init();
>         parent = u8500_init_devices(&ab8500_platdata);
>
> --
> 1.7.9.5
>

Finally, I suppose regulator inits i located in
board-mop500-regulators.c, so I would suggest to move most of this
code in there instead.

Kind regards
Ulf Hansson