diff options
authorJerry Huang <>2010-11-25 20:06:07 +0300
committerWolfgang Denk <>2010-12-19 00:11:27 +0300
commit94c08a20fc500fcc066bb83f0235b5e344e65ac6 (patch)
parent73c65e0e77cb5005cc4fa2c0cb435f1dffb90a71 (diff)
fsl_esdhc: Use mmc_set_clock to set initial speed
After booting the u-boot, and first using some SD card (such as Sandisk 2G SD card), because the field 'clock' of struct mmc is zero, this will cause the read transfer is always active and SDHC DATA line is always active, therefore, driver can't handle the next command. Therefore, we use mmc_set_clock to setup both the data structure and HW to the initial clock speed of 400000Hz. Signed-off-by: Jerry Huang <> Tested-by: Stefano Babic <> Signed-off-by: Kumar Gala <>
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 57cd4ee1f4..73d5cd3826 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -398,7 +398,7 @@ static int esdhc_init(struct mmc *mmc)
esdhc_write32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
/* Set the initial clock speed */
- set_sysctl(mmc, 400000);
+ mmc_set_clock(mmc, 400000);
/* Disable the BRR and BWR bits in IRQSTAT */
esdhc_clrbits32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
diff --git a/include/mmc.h b/include/mmc.h
index 9f94f423fb..74c0b1d0ee 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -1,5 +1,5 @@
- * Copyright 2008, Freescale Semiconductor, Inc
+ * Copyright 2008,2010 Freescale Semiconductor, Inc
* Andy Fleming
* Based (loosely) on the Linux code
@@ -280,6 +280,7 @@ int mmc_register(struct mmc *mmc);
int mmc_initialize(bd_t *bis);
int mmc_init(struct mmc *mmc);
int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size);
+void mmc_set_clock(struct mmc *mmc, uint clock);
struct mmc *find_mmc_device(int dev_num);
int mmc_set_dev(int dev_num);
void print_mmc_devices(char separator);