Skip to contentSkip to conversation

ARM: mach-shmobile: SDHI0 GPIO hotplug for AG5EVM

PATCH New Magnus Damm 1 participant 1 message Oct 12, 2011

Subsystems (4)
Arm (32-bit) Arm sub-architectures SuperH Arm/RISC-V/Renesas architecture
lore
Share & tools
lore

Magnus Damm

author maintainer
#0 lore raw

PATCH 7/7 ARM: mach-shmobile: SDHI0 GPIO hotplug for AG5EVM

From: Magnus Damm <[email protected]>

Implement GPIO hotplugging via TMIO_MMC_HAS_COLD_CD for AG5EVM SDHI0. This is possible now when INTCA is used for IRQ triggering on sh73a0. Without INTCA IRQ support we are left with the GIC hardware block that does not support dealing with active low interrupt sources.

Signed-off-by Magnus Damm <[email protected]>

---

 arch/arm/mach-shmobile/board-ag5evm.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
arch/arm/mach-shmobile/board-ag5evm.c +19 -0
@@ -338,6 +338,18 @@ static struct platform_device mipidsi0_d
 	},
 };
 
+/* SDHI0 */
+static irqreturn_t ag5evm_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,

@@ -561,6 +573,13 @@ static void __init ag5evm_init(void)
 	gpio_request(GPIO_FN_SDHID0_1_PU, NULL);
 	gpio_request(GPIO_FN_SDHID0_0_PU, NULL);
 
+	if (!request_irq(intcs_evt2irq(0x3c0), ag5evm_sdhi0_gpio_cd,
+			 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+			 "sdhi0 cd", &sdhi0_device.dev))
+		sdhi0_info.tmio_flags |= TMIO_MMC_HAS_COLD_CD;
+	else
+		pr_warn("Unable to setup SDHI0 GPIO IRQ\n");
+
 	/* enable SDHI1 on CN4 [WLAN I/F] */
 	gpio_request(GPIO_FN_SDHICLK1, NULL);
 	gpio_request(GPIO_FN_SDHICMD1_PU, NULL);