Power on the CN12 SD/MMC slot on ecovec is controlled by a GPIO, which
makes it possible to use the gpio-regulator driver to produce a primitive
voltage regulator.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
As mentioned in the introductory mail, this patch is mostly an
implementation example.
arch/sh/boards/mach-ecovec24/setup.c | 50 +++++++++++++++++++++++++++++-----
1 files changed, 43 insertions(+), 7 deletions(-)
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index a2f70e6..96561ec 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -19,6 +19,10 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/gpio-regulator.h>
+#include <linux/regulator/machine.h>
#include <linux/usb/r8a66597.h>
#include <linux/usb/renesas_usbhs.h>
#include <linux/i2c.h>
@@ -872,10 +876,45 @@ static struct platform_device vou_device = {
#if defined(CONFIG_MMC_SH_MMCIF) || defined(CONFIG_MMC_SH_MMCIF_MODULE)
/* SH_MMCIF */
-static void mmcif_set_pwr(struct platform_device *pdev, int state)
+static struct regulator_consumer_supply mmcif_power_consumers[] =
{
- gpio_set_value(GPIO_PTB7, state);
-}
+ REGULATOR_SUPPLY("MMC Vdd", "sh_mmcif.0"),
+};
+
+static struct regulator_init_data mmcif_power_init_data = {
+ .constraints = {
+ .min_uV = 3300000,
+ .max_uV = 3300000,
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(mmcif_power_consumers),
+ .consumer_supplies = mmcif_power_consumers,
+};
+
+static struct gpio_regulator_state mmcif_power_states[] = {
+ { .value = 3300000, .gpios = 0 },
+};
+
+static struct gpio_regulator_config mmcif_power_info = {
+ .supply_name = "CN12 SD/MMC Vdd",
+
+ .enable_gpio = GPIO_PTB7,
+ .enable_high = 1,
+
+ .states = mmcif_power_states,
+ .nr_states = ARRAY_SIZE(mmcif_power_states),
+
+ .type = REGULATOR_VOLTAGE,
+ .init_data = &mmcif_power_init_data,
+};
+
+static struct platform_device mmcif_power = {
+ .name = "gpio-regulator",
+ .id = -1,
+ .dev = {
+ .platform_data = &mmcif_power_info,
+ },
+};
static struct resource sh_mmcif_resources[] = {
[0] = {
@@ -897,12 +936,10 @@ static struct resource sh_mmcif_resources[] = {
};
static struct sh_mmcif_plat_data sh_mmcif_plat = {
- .set_pwr = mmcif_set_pwr,
.sup_pclk = 0, /* SH7724: Max Pclk/2 */
.caps = MMC_CAP_4_BIT_DATA |
MMC_CAP_8_BIT_DATA |
MMC_CAP_NEEDS_POLL,
- .ocr = MMC_VDD_32_33 | MMC_VDD_33_34,
};
static struct platform_device sh_mmcif_device = {
@@ -942,6 +979,7 @@ static struct platform_device *ecovec_devices[] __initdata = {
&irda_device,
&vou_device,
#if defined(CONFIG_MMC_SH_MMCIF) || defined(CONFIG_MMC_SH_MMCIF_MODULE)
+ &mmcif_power,
&sh_mmcif_device,
#endif
};
@@ -1254,8 +1292,6 @@ static int __init arch_setup(void)
gpio_request(GPIO_FN_MMC_D0, NULL);
gpio_request(GPIO_FN_MMC_CLK, NULL);
gpio_request(GPIO_FN_MMC_CMD, NULL);
- gpio_request(GPIO_PTB7, NULL);
- gpio_direction_output(GPIO_PTB7, 0);
cn12_enabled = true;
#elif defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
--
1.7.2.5
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
