Some boards use input clock from external pin for MMC/SDIO
modules in OMAP chips. Make that option selectable instead of
forcing loop back clock on everyone.
Signed-off-by: Grazvydas Ignotas <notasas@xxxxxxxxx>
---
This patch applies on previous patch I sent:
"minor mmc-twl4030 cleanups"
arch/arm/mach-omap2/mmc-twl4030.c | 14 ++++++++------
arch/arm/mach-omap2/mmc-twl4030.h | 1 +
2 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c
index b1fe0f3..0ea6ba6 100644
--- a/arch/arm/mach-omap2/mmc-twl4030.c
+++ b/arch/arm/mach-omap2/mmc-twl4030.c
@@ -250,8 +250,7 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on,
omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
}
- /* REVISIT: Loop back clock not needed for 2430? */
- if (!cpu_is_omap2430()) {
+ if (c->mmc->slots[0].internal_clock) {
reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
reg |= OMAP2_MMCSDIO1ADPCLKISEL;
omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
@@ -298,11 +297,13 @@ static int twl_mmc2_set_power(struct device *dev, int slot, int power_on, int vd
struct twl_mmc_controller *c = &hsmmc[1];
if (power_on) {
- u32 reg;
+ if (c->mmc->slots[0].internal_clock) {
+ u32 reg;
- reg = omap_ctrl_readl(control_devconf1_offset);
- reg |= OMAP2_MMCSDIO2ADPCLKISEL;
- omap_ctrl_writel(reg, control_devconf1_offset);
+ reg = omap_ctrl_readl(control_devconf1_offset);
+ reg |= OMAP2_MMCSDIO2ADPCLKISEL;
+ omap_ctrl_writel(reg, control_devconf1_offset);
+ }
ret = twl_mmc_set_voltage(c, vdd);
} else {
ret = twl_mmc_set_voltage(c, 0);
@@ -354,6 +355,7 @@ void __init hsmmc_init(struct twl4030_hsmmc_info *controllers)
MMC_VDD_29_30 |
MMC_VDD_30_31 | MMC_VDD_31_32;
mmc->slots[0].wires = c->wires;
+ mmc->slots[0].internal_clock = !c->ext_clock;
mmc->dma_mask = 0xffffffff;
/* note: twl4030 card detect GPIOs normally switch VMMCx ... */
diff --git a/arch/arm/mach-omap2/mmc-twl4030.h b/arch/arm/mach-omap2/mmc-twl4030.h
index a2e60fe..e2d58a2 100644
--- a/arch/arm/mach-omap2/mmc-twl4030.h
+++ b/arch/arm/mach-omap2/mmc-twl4030.h
@@ -11,6 +11,7 @@ struct twl4030_hsmmc_info {
u8 wires; /* 1/4/8 wires */
int gpio_cd; /* or -EINVAL */
int gpio_wp; /* or -EINVAL */
+ int ext_clock:1; /* use external pin for input clock */
};
#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
--
1.5.4.3
--
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