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authorIgor Grinberg <grinberg@compulab.co.il>2011-11-29 13:37:48 +0400
committerTony Lindgren <tony@atomide.com>2011-12-10 00:29:34 +0400
commite62245ba1caaf78d6fe2619266939c8e7caa150c (patch)
tree76a02c3f4587b080c555039f8fae0bd449a751c3 /arch
parentfac1d933f4691d59eb5f6ec02bb8eae8d5c68297 (diff)
downloadlinux-e62245ba1caaf78d6fe2619266939c8e7caa150c.tar.xz
ARM: OMAP: hsmmc: Add support for MMC 2 setup for AM35x
AM35x MMC 2 controller has internal clock loopback setting which cannot be utilized without this patch and thus SDIO devices connected to this controller and depend on this setting will fail to initialize. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> [tony@atomide.com: updated comments] Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-omap2/hsmmc.c42
1 files changed, 30 insertions, 12 deletions
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 97dfedce084b..59830d0eeb55 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -171,6 +171,17 @@ static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
}
}
+static void hsmmc2_select_input_clk_src(struct omap_mmc_platform_data *mmc)
+{
+ u32 reg;
+
+ if (mmc->slots[0].internal_clock) {
+ reg = omap_ctrl_readl(control_devconf1_offset);
+ reg |= OMAP2_MMCSDIO2ADPCLKISEL;
+ omap_ctrl_writel(reg, control_devconf1_offset);
+ }
+}
+
static void hsmmc23_before_set_reg(struct device *dev, int slot,
int power_on, int vdd)
{
@@ -179,16 +190,19 @@ static void hsmmc23_before_set_reg(struct device *dev, int slot,
if (mmc->slots[0].remux)
mmc->slots[0].remux(dev, slot, power_on);
- if (power_on) {
- /* Only MMC2 supports a CLKIN */
- if (mmc->slots[0].internal_clock) {
- u32 reg;
+ if (power_on)
+ hsmmc2_select_input_clk_src(mmc);
+}
- reg = omap_ctrl_readl(control_devconf1_offset);
- reg |= OMAP2_MMCSDIO2ADPCLKISEL;
- omap_ctrl_writel(reg, control_devconf1_offset);
- }
- }
+static int am35x_hsmmc2_set_power(struct device *dev, int slot,
+ int power_on, int vdd)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ if (power_on)
+ hsmmc2_select_input_clk_src(mmc);
+
+ return 0;
}
static int nop_mmc_set_power(struct device *dev, int slot, int power_on,
@@ -339,9 +353,7 @@ static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
*/
mmc->slots[0].ocr_mask = c->ocr_mask;
- if (cpu_is_omap3517() || cpu_is_omap3505())
- mmc->slots[0].set_power = nop_mmc_set_power;
- else
+ if (!cpu_is_omap3517() && !cpu_is_omap3505())
mmc->slots[0].features |= HSMMC_HAS_PBIAS;
if (cpu_is_omap44xx() && (omap_rev() > OMAP4430_REV_ES1_0))
@@ -364,6 +376,9 @@ static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
}
}
+ if (cpu_is_omap3517() || cpu_is_omap3505())
+ mmc->slots[0].set_power = nop_mmc_set_power;
+
/* OMAP3630 HSMMC1 supports only 4-bit */
if (cpu_is_omap3630() &&
(c->caps & MMC_CAP_8_BIT_DATA)) {
@@ -373,6 +388,9 @@ static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
}
break;
case 2:
+ if (cpu_is_omap3517() || cpu_is_omap3505())
+ mmc->slots[0].set_power = am35x_hsmmc2_set_power;
+
if (c->ext_clock)
c->transceiver = 1;
if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {