Enable debounce logic in TWL6030 so that erroneous
disconnect/connect interrupts will be suppressed.
This will fix issue where SD card is either plugged
or unplugged very slowly.
Change-Id: Icc3afa4c66b3bc7920f27ff9c9a3f32e67d5833c
Signed-off-by: Viswanath Puttagunta <vishp@xxxxxx>
---
drivers/mfd/twl6030-irq.c | 8 ++++++++
include/linux/i2c/twl.h | 5 +++++
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
index b76902f..05bb6e1 100644
--- a/drivers/mfd/twl6030-irq.c
+++ b/drivers/mfd/twl6030-irq.c
@@ -317,6 +317,14 @@ int twl6030_mmc_card_detect_config(void)
ret);
return ret;
}
+ ret = twl_i2c_write_u8(TWL6030_MODULE_ID0,
+ (MMC_MINS_DEB_MASK | MMC_MEXT_DEB_MASK),
+ TWL6030_MMCDEBOUNCING);
+ if (ret < 0) {
+ pr_err("twl6030: Failed to write MMC_MEXT_DEB_MASK %d\n",
+ ret);
+ return ret;
+ }
return twl6030_irq_base + MMCDETECT_INTR_OFFSET;
}
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 1f90de0..672dcfb 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -147,6 +147,11 @@
#define SW_FC (0x1 << 2)
#define STS_MMC 0x1
+#define TWL6030_MMCDEBOUNCING 0xED
+#define MMC_DEB_BYPASS (0x1 << 7)
+#define MMC_MINS_DEB_MASK (0xF << 3)
+#define MMC_MEXT_DEB_MASK (0x7 << 0)
+
#define TWL6030_CFG_INPUT_PUPD3 0xF2
#define MMC_PU (0x1 << 3)
#define MMC_PD (0x1 << 2)
--
1.7.4.1
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