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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
