Remove OMAP4_USBC1_ICUSB_PWRDNZ_MASK during enable/disable PWRDNZ mode for
MMC1_PBIAS and associated extended-drain MMC1 I/O cell. This is in accordance
with the control module programming guide. This fixes a bug where if trying to
use gpio_98 or gpio_99 and MMC1 at the same time the GPIO signal will be
affected by a changing SDMMC1_VDDS.
Software must keep MMC1_PBIAS cell and MMC1_IO cell PWRDNZ signals low whenever
SDMMC1_VDDS ramps up/down or changes for cell protection purposes.
MMC1 is based on SDMMC1_VDDS whereas USBC1 is based on SIM_VDDS therefore
they can operate independently.
Signed-off-by: Bryan Buckley <bryan.buckley@xxxxxx>
---
arch/arm/mach-omap2/hsmmc.c | 12 ++++--------
1 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 3842405..a6135df 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -144,8 +144,7 @@ static void omap4_hsmmc1_before_set_reg(struct device *dev, int slot,
*/
reg = omap4_ctrl_pad_readl(control_pbias_offset);
reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
- OMAP4_MMC1_PWRDNZ_MASK |
- OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+ OMAP4_MMC1_PWRDNZ_MASK);
omap4_ctrl_pad_writel(reg, control_pbias_offset);
}
@@ -165,8 +164,7 @@ static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
else
reg |= OMAP4_MMC1_PBIASLITE_VMODE_MASK;
reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
- OMAP4_MMC1_PWRDNZ_MASK |
- OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+ OMAP4_MMC1_PWRDNZ_MASK);
omap4_ctrl_pad_writel(reg, control_pbias_offset);
/* 4 microsec delay for comparator to generate an error*/
udelay(4);
@@ -174,16 +172,14 @@ static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK) {
pr_err("Pbias Voltage is not same as LDO\n");
/* Caution : On VMODE_ERROR Power Down MMC IO */
- reg &= ~(OMAP4_MMC1_PWRDNZ_MASK |
- OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+ reg &= ~(OMAP4_MMC1_PWRDNZ_MASK);
omap4_ctrl_pad_writel(reg, control_pbias_offset);
}
} else {
reg = omap4_ctrl_pad_readl(control_pbias_offset);
reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
OMAP4_MMC1_PWRDNZ_MASK |
- OMAP4_MMC1_PBIASLITE_VMODE_MASK |
- OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+ OMAP4_MMC1_PBIASLITE_VMODE_MASK);
omap4_ctrl_pad_writel(reg, control_pbias_offset);
}
}
--
1.7.0.4
--
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