3 files changed, 64 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/ste-nomadik-s8815.dts b/arch/arm/boot/dts/ste-nomadik-s8815.dts
index cc777109f98f..b28fbf3408e3 100644
--- a/arch/arm/boot/dts/ste-nomadik-s8815.dts
+++ b/arch/arm/boot/dts/ste-nomadik-s8815.dts
@@ -22,5 +22,9 @@
                         interrupts = <19 0x1>;
                         interrupt-parent = <&gpio3>;
                 };
+                /* This will bias the MMC/SD card detect line */
+                mmcsd-gpio {
+                        gpios = <&gpio3 16 0x1>;
+                };
         };
 };
diff --git a/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi b/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
index f129425883a4..0164edc78eed 100644
--- a/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
+++ b/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
@@ -190,5 +190,18 @@
                         interrupt-parent = <&vica>;
                         interrupts = <10>;
                 };
+
+                mmcsd: sdi@101f6000 {
+                        compatible = "arm,pl18x", "arm,primecell";
+                        reg = <0x101f6000 0x1000>;
+                        interrupt-parent = <&vica>;
+                        interrupts = <22>;
+                        max-frequency = <48000000>;
+                        bus-width = <4>;
+                        mmc-cap-mmc-highspeed;
+                        mmc-cap-sd-highspeed;
+                        cd-gpios = <&gpio3 15 0x1>;
+                        cd-inverted;
+                };
         };
 };
diff --git a/arch/arm/mach-nomadik/cpu-8815.c b/arch/arm/mach-nomadik/cpu-8815.c
index 339496f15138..5ad301e4eb2f 100644
--- a/arch/arm/mach-nomadik/cpu-8815.c
+++ b/arch/arm/mach-nomadik/cpu-8815.c
@@ -36,6 +36,7 @@
 #include <linux/of_platform.h>
 #include <linux/mtd/fsmc.h>
 #include <linux/gpio.h>
+#include <linux/amba/mmci.h>
 
 #include <mach/hardware.h>
 #include <mach/irqs.h>
@@ -297,6 +298,50 @@ static int __init cpu8815_eth_init(void)
 }
 device_initcall(cpu8815_eth_init);
 
+/*
+ * TODO:
+ * cannot be set from device tree, convert to a proper DT
+ * binding.
+ */
+static struct mmci_platform_data mmcsd_plat_data = {
+        .ocr_mask = MMC_VDD_29_30,
+};
+
+/*
+ * This GPIO pin turns on a line that is used to detect card insertion
+ * on this board.
+ */
+static int __init cpu8815_mmcsd_init(void)
+{
+        struct device_node *cdbias;
+        int gpio, err;
+
+        cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
+        if (!cdbias) {
+                pr_info("could not find MMC/SD card detect bias node\n");
+                return 0;
+        }
+        gpio = of_get_gpio(cdbias, 0);
+        if (gpio < 0) {
+                pr_info("could not obtain MMC/SD card detect bias GPIO\n");
+                return 0;
+        }
+        err = gpio_request(gpio, "card detect bias");
+        if (err) {
+                pr_info("failed to request card detect bias GPIO %d\n", gpio);
+                return -ENODEV;
+        }
+        err = gpio_direction_output(gpio, 0);
+        if (err){
+                pr_info("failed to set GPIO %d as output, low\n", gpio);
+                return err;
+        }
+        pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
+        return 0;
+}
+device_initcall(cpu8815_mmcsd_init);
+
+
 /* These are mostly to get the right device names for the clock lookups */
 static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
         OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE,
@@ -319,7 +364,8 @@ static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
                 "rtc-pl031", NULL),
         OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
                 "fsmc-nand", &cpu8815_nand_data),
-
+        OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
+                "mmci", &mmcsd_plat_data),
         { /* sentinel */ },
 };