diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boot/dts/ste-nomadik-s8815.dts | 4 | ||||
| -rw-r--r-- | arch/arm/boot/dts/ste-nomadik-stn8815.dtsi | 13 | ||||
| -rw-r--r-- | arch/arm/mach-nomadik/cpu-8815.c | 48 |
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 */ }, }; |