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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2011-05-11 16:51:20 +0000
committerPaul Mundt <lethal@linux-sh.org>2011-05-26 15:07:10 +0900
commit4bff4a7ee4b9e487a1bc1d31082e77b6a381418a (patch)
treee5f55b2c6924e252e5e4be040bbda2dc670e7704 /arch/arm
parentdce65a6a92f34fbc425ffb4302f8e747d89c9792 (diff)
ARM: arch-shmobile: support SDHI card detection on mackerel, using a GPIO
On sh7372 the card-detection pin of SDHI0 can also produce interrupts, when configured as GPIO. Use this feature to power down SDHI0, when no card is plugged in. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-shmobile/board-mackerel.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index d4fe74067d6c..776f20560e72 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -39,6 +39,7 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
+#include <linux/pm_runtime.h>
#include <linux/smsc911x.h>
#include <linux/sh_intc.h>
#include <linux/tca6416_keypad.h>
@@ -913,6 +914,17 @@ static int slot_cn7_get_cd(struct platform_device *pdev)
}
/* SDHI0 */
+static irqreturn_t mackerel_sdhi0_gpio_cd(int irq, void *arg)
+{
+ struct device *dev = arg;
+ struct sh_mobile_sdhi_info *info = dev->platform_data;
+ struct tmio_mmc_data *pdata = info->pdata;
+
+ tmio_mmc_cd_wakeup(pdata);
+
+ return IRQ_HANDLED;
+}
+
static struct sh_mobile_sdhi_info sdhi0_info = {
.dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
.dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
@@ -1296,6 +1308,7 @@ static void __init mackerel_init(void)
{
u32 srcr4;
struct clk *clk;
+ int ret;
sh7372_pinmux_init();
@@ -1401,6 +1414,13 @@ static void __init mackerel_init(void)
gpio_request(GPIO_FN_SDHID0_1, NULL);
gpio_request(GPIO_FN_SDHID0_0, NULL);
+ ret = request_irq(evt2irq(0x3340), mackerel_sdhi0_gpio_cd,
+ IRQF_TRIGGER_FALLING, "sdhi0 cd", &sdhi0_device.dev);
+ if (!ret)
+ sdhi0_info.tmio_flags |= TMIO_MMC_HAS_COLD_CD;
+ else
+ pr_err("Cannot get IRQ #%d: %d\n", evt2irq(0x3340), ret);
+
#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)
/* enable SDHI1 */
gpio_request(GPIO_FN_SDHICMD1, NULL);