[U-Boot] [PATCH v2] mx35: Fix eSDHC clocks

[Benoît Thébaudeau]

Each eSDHC instance has a dedicated clock.

gd->sdhc_clk must also be set accordingly. This is good for the case only a
single SDHC instance is used (initialization made with fsl_esdhc_mmc_init()). A
future patch will fix the multi-instance use case (initialization made directly
with fsl_esdhc_initialize()).

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau at advansee.com>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Eric Bénard <eric at eukrea.com>
Cc: Otavio Salvador <otavio at ossystems.com.br>
---
This patch supersedes http://patchwork.ozlabs.org/patch/177438/ .
Changes for v2:
 - Improve detailed description.
 - Make eSDHC1 the default for gd->sdhc_clk.

 .../arch/arm/cpu/arm1136/mx35/generic.c            |   14 ++++++++++++--
 .../arch/arm/include/asm/arch-mx35/clock.h         |    4 +++-
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git u-boot-imx-e1eb75b.orig/arch/arm/cpu/arm1136/mx35/generic.c u-boot-imx-e1eb75b/arch/arm/cpu/arm1136/mx35/generic.c
index ef65176..75c25d4 100644
--- u-boot-imx-e1eb75b.orig/arch/arm/cpu/arm1136/mx35/generic.c
+++ u-boot-imx-e1eb75b/arch/arm/cpu/arm1136/mx35/generic.c
@@ -360,8 +360,12 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return imx_get_uartclk();
-	case MXC_ESDHC_CLK:
+	case MXC_ESDHC1_CLK:
 		return mxc_get_peri_clock(ESDHC1_CLK);
+	case MXC_ESDHC2_CLK:
+		return mxc_get_peri_clock(ESDHC2_CLK);
+	case MXC_ESDHC3_CLK:
+		return mxc_get_peri_clock(ESDHC3_CLK);
 	case MXC_USB_CLK:
 		return mxc_get_main_clock(USB_CLK);
 	case MXC_FEC_CLK:
@@ -471,7 +475,13 @@ int cpu_mmc_init(bd_t *bis)
 int get_clocks(void)
 {
 #ifdef CONFIG_FSL_ESDHC
-	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+#if CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC2_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+#elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC3_BASE_ADDR
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+#else
+	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+#endif
 #endif
 	return 0;
 }
diff --git u-boot-imx-e1eb75b.orig/arch/arm/include/asm/arch-mx35/clock.h u-boot-imx-e1eb75b/arch/arm/include/asm/arch-mx35/clock.h
index eb7458a..60285df 100644
--- u-boot-imx-e1eb75b.orig/arch/arm/include/asm/arch-mx35/clock.h
+++ u-boot-imx-e1eb75b/arch/arm/include/asm/arch-mx35/clock.h
@@ -44,7 +44,9 @@ enum mxc_clock {
 	MXC_IPG_CLK,
 	MXC_IPG_PERCLK,
 	MXC_UART_CLK,
-	MXC_ESDHC_CLK,
+	MXC_ESDHC1_CLK,
+	MXC_ESDHC2_CLK,
+	MXC_ESDHC3_CLK,
 	MXC_USB_CLK,
 	MXC_CSPI_CLK,
 	MXC_FEC_CLK,