linux-kernel - [patch 3/6] xtensa: add spi mmc host to s6105 platform

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Message-Id: <1237822462-32109-3-git-send-email-dg@emlix.com>
Date:	Mon, 23 Mar 2009 16:34:19 +0100
From:	Daniel Glöckner <dg@...ix.com>
To:	Chris Zankel <chris@...kel.net>,
	David Brownell <dbrownell@...rs.sourceforge.net>
Cc:	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org,
	Daniel Glöckner <dg@...ix.com>
Subject: [patch 3/6] xtensa: add spi mmc host to s6105 platform

Signed-off-by: Daniel Glöckner <dg@...ix.com>
---
 arch/xtensa/platforms/s6105/device.c |   55 ++++++++++++++++++++++++++++++++++
 1 files changed, 55 insertions(+), 0 deletions(-)

diff --git a/arch/xtensa/platforms/s6105/device.c b/arch/xtensa/platforms/s6105/device.c
index a7ea916..789448e 100644
--- a/arch/xtensa/platforms/s6105/device.c
+++ b/arch/xtensa/platforms/s6105/device.c
@@ -11,9 +11,11 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/phy.h>
+#include <linux/mmc/host.h>
 #include <linux/platform_device.h>
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
+#include <linux/spi/mmc_spi.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_s6000.h>
 
@@ -209,7 +211,60 @@ static __devinitdata struct s6_spi_platform_data s6_spi_pdata = {
 #define S6_SPI_CS_EXPANSION	3
 #define S6_SPI_CS_MMC_SLOT	4
 
+static int __devinit s6_init_mmc_host(struct device *spi,
+				      irqreturn_t (*handler)(int, void *),
+				      void *mmc)
+{
+	int ret;
+	ret = gpio_request(GPIO_SD_WP, "mmc_wp");
+	if (ret < 0)
+		return ret;
+	ret = gpio_request(GPIO_SD_IRQ, "mmc_irq");
+	if (ret < 0)
+		return ret;
+	ret = gpio_direction_input(GPIO_SD_WP);
+	if (ret < 0)
+		return ret;
+	ret = gpio_direction_input(GPIO_SD_IRQ);
+	if (ret < 0)
+		return ret;
+	ret = gpio_to_irq(GPIO_SD_IRQ);
+	if (ret < 0)
+		return ret;
+	ret = request_irq(ret, handler,
+			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+			  "mmc_slot", mmc);
+	return ret;
+}
+
+static void __devexit s6_exit_mmc_host(struct device *spi, void *mmc)
+{
+	free_irq(gpio_to_irq(GPIO_SD_IRQ), mmc);
+	gpio_free(GPIO_SD_IRQ);
+	gpio_free(GPIO_SD_WP);
+}
+
+static int s6_mmc_get_ro(struct device *spi)
+{
+	return gpio_get_value(GPIO_SD_WP);
+}
+
+static struct mmc_spi_platform_data s6_spi_mmc_pdata = {
+	.caps = 0,
+	.ocr_mask = MMC_VDD_32_33,
+	.init = s6_init_mmc_host,
+	.exit = __devexit_p(s6_exit_mmc_host),
+	.get_ro = s6_mmc_get_ro,
+};
+
 static struct spi_board_info __initdata s6_spi_devices[] = {
+	{
+		.modalias = "mmc_spi",
+		.platform_data = &s6_spi_mmc_pdata,
+		.bus_num = S6_SPI_BUS_NUM,
+		.chip_select = S6_SPI_CS_MMC_SLOT,
+		.max_speed_hz = 50000000,
+	},
 };
 
 static struct platform_device platform_devices[] = {
-- 
1.6.2.107.ge47ee

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