1 files changed, 73 insertions, 0 deletions

diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
index 10bf228ad626..2d3bb82dbf24 100644
--- a/drivers/mfd/twl6030-irq.c
+++ b/drivers/mfd/twl6030-irq.c
@@ -36,6 +36,7 @@
 #include <linux/irq.h>
 #include <linux/kthread.h>
 #include <linux/i2c/twl.h>
+#include <linux/platform_device.h>
 
 /*
  * TWL6030 (unlike its predecessors, which had two level interrupt handling)
@@ -223,6 +224,78 @@ int twl6030_interrupt_mask(u8 bit_mask, u8 offset)
 }
 EXPORT_SYMBOL(twl6030_interrupt_mask);
 
+int twl6030_mmc_card_detect_config(void)
+{
+        int ret;
+        u8 reg_val = 0;
+
+        /* Unmasking the Card detect Interrupt line for MMC1 from Phoenix */
+        twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
+                                                REG_INT_MSK_LINE_B);
+        twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
+                                                REG_INT_MSK_STS_B);
+        /*
+         * Intially Configuring MMC_CTRL for receving interrupts &
+         * Card status on TWL6030 for MMC1
+         */
+        ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &reg_val, TWL6030_MMCCTRL);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to read MMCCTRL, error %d\n", ret);
+                return ret;
+        }
+        reg_val &= ~VMMC_AUTO_OFF;
+        reg_val |= SW_FC;
+        ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val, TWL6030_MMCCTRL);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to write MMCCTRL, error %d\n", ret);
+                return ret;
+        }
+
+        /* Configuring PullUp-PullDown register */
+        ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &reg_val,
+                                                TWL6030_CFG_INPUT_PUPD3);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to read CFG_INPUT_PUPD3, error %d\n",
+                                                                        ret);
+                return ret;
+        }
+        reg_val &= ~(MMC_PU | MMC_PD);
+        ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val,
+                                                TWL6030_CFG_INPUT_PUPD3);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to write CFG_INPUT_PUPD3, error %d\n",
+                                                                        ret);
+                return ret;
+        }
+        return 0;
+}
+EXPORT_SYMBOL(twl6030_mmc_card_detect_config);
+
+int twl6030_mmc_card_detect(struct device *dev, int slot)
+{
+        int ret = -EIO;
+        u8 read_reg = 0;
+        struct platform_device *pdev = to_platform_device(dev);
+
+        if (pdev->id) {
+                /* TWL6030 provide's Card detect support for
+                 * only MMC1 controller.
+                 */
+                pr_err("Unkown MMC controller %d in %s\n", pdev->id, __func__);
+                return ret;
+        }
+        /*
+         * BIT0 of MMC_CTRL on TWL6030 provides card status for MMC1
+         * 0 - Card not present ,1 - Card present
+         */
+        ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &read_reg,
+                                                TWL6030_MMCCTRL);
+        if (ret >= 0)
+                ret = read_reg & STS_MMC;
+        return ret;
+}
+EXPORT_SYMBOL(twl6030_mmc_card_detect);
+
 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
 {