From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peng Fan Date: Sat, 8 Oct 2016 18:07:51 +0800 Subject: [U-Boot] [PATCH] mmc: introduce mmc_power_init Message-ID: <1475921271-29093-1-git-send-email-peng.fan@nxp.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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. Signed-off-by: Peng Fan Cc: Jaehoon Chung --- The RFC patset thread: http://lists.denx.de/pipermail/u-boot/2016-April/251019.html V1: Use a generic way to handle vmmc supply, but not let vendor driver to handle it. 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..c361098 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) { } +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) { + debug("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 */ -- 2.6.2