[U-Boot] [PATCH v2 1/2] mmc: Board-specific MMC power initializations

[Paul Kocialkowski]

Some devices may use non-standard combinations of regulators to power MMC:
this allows these devices to provide a board-specific MMC power init function
to set everything up in their own way.

Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
---
 drivers/mmc/mmc.c | 8 ++++++++
 include/mmc.h     | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 44a4feb..125f347 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1277,6 +1277,12 @@ block_dev_desc_t *mmc_get_dev(int dev)
 }
 #endif
 
+/* board-specific MMC power initializations. */
+__weak int board_mmc_power_init(void)
+{
+	return -1;
+}
+
 int mmc_start_init(struct mmc *mmc)
 {
 	int err;
@@ -1293,6 +1299,8 @@ int mmc_start_init(struct mmc *mmc)
 	if (mmc->has_init)
 		return 0;
 
+	board_mmc_power_init();
+
 	/* made sure it's not NULL earlier */
 	err = mmc->cfg->ops->init(mmc);
 
diff --git a/include/mmc.h b/include/mmc.h
index 7f5f9bc..577e269 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -388,6 +388,8 @@ int mmc_legacy_init(int verbose);
 int board_mmc_init(bd_t *bis);
 int cpu_mmc_init(bd_t *bis);
 
+int board_mmc_power_init(void);
+
 /* Set block count limit because of 16 bit register limit on some hardware*/
 #ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
 #define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
-- 
1.9.1