mfd: Adding twl6030 mmc card detect support for MMC1

Adding card detect callback function and card detect configuration
function for MMC1 Controller on OMAP4.

Card detect configuration function does initial configuration of the
MMC Control & PullUp-PullDown registers of Phoenix.

For MMC1 Controller, card detect interrupt source is
twl6030 which is non-gpio. The card detect call back function provides
card present/absent status by reading MMC Control register present
on twl6030.

Since OMAP4 doesn't use any GPIO line as used in OMAP3 for card detect,
the suspend/resume initialization which was done in omap_hsmmc_gpio_init
previously is moved to the probe thus making it generic for both OMAP3 &
OMAP4.

Cc: Tony Lindgren <tony@atomide.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Madhusudhan Chikkature <madhu.cr@ti.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 69a4ae971e41..df5a425a49d1 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -269,9 +269,14 @@ static int omap4_twl6030_hsmmc_late_init(struct device *dev)
         struct omap_mmc_platform_data *pdata = dev->platform_data;
 
         /* Setting MMC1 Card detect Irq */
-        if (pdev->id == 0)
+        if (pdev->id == 0) {
+                ret = twl6030_mmc_card_detect_config();
+                if (ret)
+                        pr_err("Failed configuring MMC1 card detect\n");
                 pdata->slots[0].card_detect_irq = TWL6030_IRQ_BASE +
                                                 MMCDETECT_INTR_OFFSET;
+                pdata->slots[0].card_detect = twl6030_mmc_card_detect;
+        }
         return ret;
 }