summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--arch/arm/mach-omap1/board-ams-delta.c63
-rw-r--r--drivers/input/serio/ams_delta_serio.c37
2 files changed, 89 insertions, 11 deletions
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 02b8e217bcbc..6573e1014908 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -526,6 +526,46 @@ static struct platform_device ams_delta_serio_device = {
.id = PLATFORM_DEVID_NONE,
};
+static struct regulator_consumer_supply keybrd_pwr_consumers[] = {
+ /*
+ * Initialize supply .dev_name with NULL. It will be replaced
+ * with serio dev_name() as soon as the serio device is registered.
+ */
+ REGULATOR_SUPPLY("vcc", NULL),
+};
+
+static struct regulator_init_data keybrd_pwr_initdata = {
+ .constraints = {
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(keybrd_pwr_consumers),
+ .consumer_supplies = keybrd_pwr_consumers,
+};
+
+static struct fixed_voltage_config keybrd_pwr_config = {
+ .supply_name = "keybrd_pwr",
+ .microvolts = 5000000,
+ .gpio = AMS_DELTA_GPIO_PIN_KEYBRD_PWR,
+ .enable_high = 1,
+ .init_data = &keybrd_pwr_initdata,
+};
+
+static struct platform_device keybrd_pwr_device = {
+ .name = "reg-fixed-voltage",
+ .id = PLATFORM_DEVID_AUTO,
+ .dev = {
+ .platform_data = &keybrd_pwr_config,
+ },
+};
+
+static struct gpiod_lookup_table keybrd_pwr_gpio_table = {
+ .table = {
+ GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_KEYBRD_PWR, NULL,
+ GPIO_ACTIVE_HIGH),
+ { },
+ },
+};
+
static struct platform_device *ams_delta_devices[] __initdata = {
&latch1_gpio_device,
&latch2_gpio_device,
@@ -543,6 +583,7 @@ static struct platform_device *late_devices[] __initdata = {
static struct gpiod_lookup_table *ams_delta_gpio_tables[] __initdata = {
&ams_delta_audio_gpio_table,
+ &keybrd_pwr_gpio_table,
};
static struct gpiod_lookup_table *late_gpio_tables[] __initdata = {
@@ -598,12 +639,30 @@ static void __init ams_delta_init(void)
platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
/*
- * As soon as devices have been registered, assign their dev_names
- * to respective GPIO lookup tables before they are added.
+ * As soon as regulator consumers have been registered, assign their
+ * dev_names to consumer supply entries of respective regulators.
+ */
+ keybrd_pwr_consumers[0].dev_name =
+ dev_name(&ams_delta_serio_device.dev);
+
+ /*
+ * Once consumer supply entries are populated with dev_names,
+ * register regulator devices. At this stage only the keyboard
+ * power regulator has its consumer supply table fully populated.
+ */
+ platform_device_register(&keybrd_pwr_device);
+
+ /*
+ * As soon as GPIO consumers have been registered, assign
+ * their dev_names to respective GPIO lookup tables.
*/
ams_delta_audio_gpio_table.dev_id =
dev_name(&ams_delta_audio_device.dev);
+ keybrd_pwr_gpio_table.dev_id = dev_name(&keybrd_pwr_device.dev);
+ /*
+ * Once GPIO lookup tables are populated with dev_names, register them.
+ */
gpiod_add_lookup_tables(ams_delta_gpio_tables,
ARRAY_SIZE(ams_delta_gpio_tables));
diff --git a/drivers/input/serio/ams_delta_serio.c b/drivers/input/serio/ams_delta_serio.c
index 551a4fa73fe4..854d0d3ada52 100644
--- a/drivers/input/serio/ams_delta_serio.c
+++ b/drivers/input/serio/ams_delta_serio.c
@@ -23,6 +23,7 @@
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
#include <linux/serio.h>
#include <linux/slab.h>
#include <linux/module.h>
@@ -39,6 +40,7 @@ MODULE_LICENSE("GPL");
struct ams_delta_serio {
struct serio *serio;
+ struct regulator *vcc;
};
static int check_data(struct serio *serio, int data)
@@ -94,16 +96,18 @@ static irqreturn_t ams_delta_serio_interrupt(int irq, void *dev_id)
static int ams_delta_serio_open(struct serio *serio)
{
- /* enable keyboard */
- gpio_set_value(AMS_DELTA_GPIO_PIN_KEYBRD_PWR, 1);
+ struct ams_delta_serio *priv = serio->port_data;
- return 0;
+ /* enable keyboard */
+ return regulator_enable(priv->vcc);
}
static void ams_delta_serio_close(struct serio *serio)
{
+ struct ams_delta_serio *priv = serio->port_data;
+
/* disable keyboard */
- gpio_set_value(AMS_DELTA_GPIO_PIN_KEYBRD_PWR, 0);
+ regulator_disable(priv->vcc);
}
static const struct gpio ams_delta_gpios[] __initconst_or_module = {
@@ -118,11 +122,6 @@ static const struct gpio ams_delta_gpios[] __initconst_or_module = {
.label = "serio-clock",
},
{
- .gpio = AMS_DELTA_GPIO_PIN_KEYBRD_PWR,
- .flags = GPIOF_OUT_INIT_LOW,
- .label = "serio-power",
- },
- {
.gpio = AMS_DELTA_GPIO_PIN_KEYBRD_DATAOUT,
.flags = GPIOF_OUT_INIT_LOW,
.label = "serio-dataout",
@@ -146,6 +145,26 @@ static int ams_delta_serio_init(struct platform_device *pdev)
goto serio;
}
+ priv->vcc = devm_regulator_get(&pdev->dev, "vcc");
+ if (IS_ERR(priv->vcc)) {
+ err = PTR_ERR(priv->vcc);
+ dev_err(&pdev->dev, "regulator request failed (%d)\n", err);
+ /*
+ * When running on a non-dt platform and requested regulator
+ * is not available, devm_regulator_get() never returns
+ * -EPROBE_DEFER as it is not able to justify if the regulator
+ * may still appear later. On the other hand, the board can
+ * still set full constriants flag at late_initcall in order
+ * to instruct devm_regulator_get() to returnn a dummy one
+ * if sufficient. Hence, if we get -ENODEV here, let's convert
+ * it to -EPROBE_DEFER and wait for the board to decide or
+ * let Deferred Probe infrastructure handle this error.
+ */
+ if (err == -ENODEV)
+ err = -EPROBE_DEFER;
+ goto gpio;
+ }
+
err = request_irq(gpio_to_irq(AMS_DELTA_GPIO_PIN_KEYBRD_CLK),
ams_delta_serio_interrupt, IRQ_TYPE_EDGE_RISING,
DRIVER_NAME, priv);