Hi,
On 10/11/2016 04:08 PM, Peng Fan wrote:
> In device tree, there is vmmc-supply property for SD/MMC.
> Introduce mmc_power_init function to handle vmmc-supply.
>
> mmc_power_init will first invoke board_mmc_power_init to
> avoid break boards which already implement board_mmc_power_init.
>
> If DM_MMC and DM_REGULATOR is defined, the regulator
> will be enabled to power up the device.
Applied on u-boot-mmc. Thanks!
Best Regards,
Jaehoon Chung
>
> Signed-off-by: Peng Fan
> Cc: Jaehoon Chung
> ---
>
> V2:
> Change function prototype to static.
> Use puts to replace debug, when no vmmc-supply.
>
> V1: Use a generic way to handle vmmc supply, but not let vendor driver
> to handle it.
>
> The RFC patset thread:
> http://lists.denx.de/pipermail/u-boot/2016-April/251019.html
>
> drivers/mmc/mmc.c | 30 +-
> 1 file changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 0312da9..320413a 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -15,6 +15,7 @@
> #include
> #include
> #include
> +#include
> #include
> #include
> #include
> @@ -1582,6 +1583,31 @@ __weak void board_mmc_power_init(void)
> {
> }
>
> +static int mmc_power_init(struct mmc *mmc)
> +{
> + board_mmc_power_init();
> +
> +#if defined(CONFIG_DM_MMC) && defined(CONFIG_DM_REGULATOR) && \
> + !defined(CONFIG_SPL_BUILD)
> + struct udevice *vmmc_supply;
> + int ret;
> +
> + ret = device_get_supply_regulator(mmc->dev, "vmmc-supply",
> + &vmmc_supply);
> + if (ret) {
> + puts("No vmmc supply\n");
> + return 0;
> + }
> +
> + ret = regulator_set_enable(vmmc_supply, true);
> + if (ret) {
> + puts("Error enabling VMMC supply\n");
> + return ret;
> + }
> +#endif
> + return 0;
> +}
> +
> int mmc_start_init(struct mmc *mmc)
> {
> bool no_card;
> @@ -1606,7 +1632,9 @@ int mmc_start_init(struct mmc *mmc)
> #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
> mmc_adapter_card_type_ident();
> #endif
> - board_mmc_power_init();
> + err = mmc_power_init(mmc);
> + if (err)
> + return err;
>
> #ifdef CONFIG_DM_MMC_OPS
> /* The device has already been probed ready for use */
>
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