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authorAxel Haslam <ahaslam@baylibre.com>2016-11-24 16:04:53 +0100
committerSekhar Nori <nsekhar@ti.com>2016-11-28 14:01:16 +0530
commitbdf0e8364fd3a0c510a4f5d54b6e567903143cdb (patch)
treedab0fc2abb84787c71fa9d38f8f7d851b6e11465
parentc69f43fb4f26ddb45c285dfdfc7d7e9c5993d11c (diff)
ARM: davinci: da850-evm: use gpio descriptor for mmc pins
Currently the mmc driver is polling the gpio to know if the card was removed. By using a gpio descriptor instead of the platform callbacks, the driver will be able to register the gpio using the mmc core APIs designed for this purpose. This has the advantage that an irq will be registered, and polling is no longer needed. Also, a dependency on platform callbacks is removed for this board. Signed-off-by: Axel Haslam <ahaslam@baylibre.com> [nsekhar@ti.com: minor commit message edit] Signed-off-by: Sekhar Nori <nsekhar@ti.com>
-rw-r--r--arch/arm/mach-davinci/board-da850-evm.c35
1 files changed, 10 insertions, 25 deletions
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index ec5cb105e1d6..1a31ac32c15e 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -15,6 +15,7 @@
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
+#include <linux/gpio/machine.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
@@ -56,9 +57,6 @@
#define DA850_LCD_PWR_PIN GPIO_TO_PIN(2, 8)
#define DA850_LCD_BL_PIN GPIO_TO_PIN(2, 15)
-#define DA850_MMCSD_CD_PIN GPIO_TO_PIN(4, 0)
-#define DA850_MMCSD_WP_PIN GPIO_TO_PIN(4, 1)
-
#define DA850_MII_MDIO_CLKEN_PIN GPIO_TO_PIN(2, 6)
static struct mtd_partition da850evm_spiflash_part[] = {
@@ -776,19 +774,16 @@ static const short da850_evm_mcasp_pins[] __initconst = {
-1
};
-static int da850_evm_mmc_get_ro(int index)
-{
- return gpio_get_value(DA850_MMCSD_WP_PIN);
-}
-
-static int da850_evm_mmc_get_cd(int index)
-{
- return !gpio_get_value(DA850_MMCSD_CD_PIN);
-}
+static struct gpiod_lookup_table mmc_gpios_table = {
+ .dev_id = "da830-mmc.0",
+ .table = {
+ /* gpio chip 2 contains gpio range 64-95 */
+ GPIO_LOOKUP("davinci_gpio.2", 0, "cd", GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP("davinci_gpio.2", 1, "wp", GPIO_ACTIVE_LOW),
+ },
+};
static struct davinci_mmc_config da850_mmc_config = {
- .get_ro = da850_evm_mmc_get_ro,
- .get_cd = da850_evm_mmc_get_cd,
.wires = 4,
.max_freq = 50000000,
.caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
@@ -1383,17 +1378,7 @@ static __init void da850_evm_init(void)
pr_warn("%s: MMCSD0 mux setup failed: %d\n",
__func__, ret);
- ret = gpio_request(DA850_MMCSD_CD_PIN, "MMC CD\n");
- if (ret)
- pr_warn("%s: can not open GPIO %d\n",
- __func__, DA850_MMCSD_CD_PIN);
- gpio_direction_input(DA850_MMCSD_CD_PIN);
-
- ret = gpio_request(DA850_MMCSD_WP_PIN, "MMC WP\n");
- if (ret)
- pr_warn("%s: can not open GPIO %d\n",
- __func__, DA850_MMCSD_WP_PIN);
- gpio_direction_input(DA850_MMCSD_WP_PIN);
+ gpiod_add_lookup_table(&mmc_gpios_table);
ret = da8xx_register_mmcsd0(&da850_mmc_config);
if (ret)