Hi
On Fri, Jan 10, 2014 at 6:30 PM, Balaji T K <balajitk@xxxxxx> wrote:
> In DT case, PBAIS registers are programmed via regulator,
> use regulator APIs to control PBIAS.
>
> Signed-off-by: Balaji T K <balajitk@xxxxxx>
> ---
> drivers/mmc/host/omap_hsmmc.c | 39 +++++++++++++++++++++++++++++++++++++++
> 1 files changed, 39 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index 342be25..0a390f8 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -126,6 +126,10 @@
> #define OMAP_MMC_MAX_CLOCK 52000000
> #define DRIVER_NAME "omap_hsmmc"
>
> +#define VDD_1V8 1800000 /* 180000 uV */
> +#define VDD_3V0 3000000 /* 300000 uV */
> +#define VDD_165_195 (ffs(MMC_VDD_165_195) - 1)
> +
> /*
> * One controller can have multiple slots, like on some omap boards using
> * omap.c controller driver. Luckily this is not currently done on any known
> @@ -164,6 +168,8 @@ struct omap_hsmmc_host {
> */
> struct regulator *vcc;
> struct regulator *vcc_aux;
> + struct regulator *pbias;
> + bool pbias_enabled;
> int pbias_disable;
> void __iomem *base;
> resource_size_t mapbase;
> @@ -272,6 +278,15 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
> if (mmc_slot(host).before_set_reg)
> mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
>
> + if (host->pbias) {
> + if (host->pbias_enabled == 1) {
> + ret = regulator_disable(host->pbias);
> + if (!ret)
> + host->pbias_enabled = 0;
> + }
> + regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0);
> + }
> +
> /*
> * Assume Vcc regulator is used only to power the card ... OMAP
> * VDDS is used to power the pins, optionally with a transceiver to
> @@ -306,9 +321,29 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
> }
> }
>
> + if (host->pbias) {
> + if (vdd <= VDD_165_195)
> + ret = regulator_set_voltage(host->pbias, VDD_1V8,
> + VDD_1V8);
> + else
> + ret = regulator_set_voltage(host->pbias, VDD_3V0,
> + VDD_3V0);
> + if (ret < 0)
> + goto error_set_power;
> +
> + if (host->pbias_enabled == 0) {
> + ret = regulator_enable(host->pbias);
> + if (!ret) {
> + host->pbias_enabled = 1;
> + goto error_set_power;
why you a goto to error_set_power if the regulator enable was a succes?
and if pbias_enabled is used for verify if is already enabled. Is the
same to use
regulator_is_enabled?
Michael
> + }
> + }
> + }
> +
> if (mmc_slot(host).after_set_reg)
> mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
>
> +error_set_power:
> return ret;
> }
>
> @@ -342,6 +377,9 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
> reg = devm_regulator_get_optional(host->dev, "vmmc_aux");
> host->vcc_aux = IS_ERR(reg) ? NULL : reg;
>
> + reg = devm_regulator_get_optional(host->dev, "pbias");
> + host->pbias = IS_ERR(reg) ? NULL : reg;
> +
> /* For eMMC do not power off when not in sleep state */
> if (mmc_slot(host).no_regulator_off_init)
> return 0;
> @@ -1808,6 +1846,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> host->base = ioremap(host->mapbase, SZ_4K);
> host->power_mode = MMC_POWER_OFF;
> host->next_data.cookie = 1;
> + host->pbias_enabled = 0;
>
> platform_set_drvdata(pdev, host);
>
> --
> 1.7.5.4
>
> --
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