The switchover to cross-platform GPIO interface unexpectedly caused all
output GPIO switches to be set to high state by default, unlike the
original OMAP code. Introduce a new GPIO switch flag to define the
initial state of the switch. Unless the flag is set, the default is now
inactive state of the switch.
Also store the state of output switches directly into the switch struct
instead of trying to read an output GPIO.
Signed-off-by: Jani Nikula <ext-jani.1.nikula@xxxxxxxxx>
---
arch/arm/plat-omap/gpio-switch.c | 13 +++++++++----
arch/arm/plat-omap/include/mach/gpio-switch.h | 11 ++++++-----
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/arch/arm/plat-omap/gpio-switch.c b/arch/arm/plat-omap/gpio-switch.c
index 2b5665d..9053ea0 100644
--- a/arch/arm/plat-omap/gpio-switch.c
+++ b/arch/arm/plat-omap/gpio-switch.c
@@ -286,12 +286,17 @@ static int __init new_switch(struct gpio_switch *sw)
/* input: 1, output: 0 */
direction = !(sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT);
- if (direction)
+ if (direction) {
gpio_direction_input(sw->gpio);
- else
- gpio_direction_output(sw->gpio, true);
+ sw->state = gpio_sw_get_state(sw);
+ } else {
+ int state = sw->state = !!(sw->flags &
+ OMAP_GPIO_SWITCH_FLAG_OUTPUT_INIT_ACTIVE);
- sw->state = gpio_sw_get_state(sw);
+ if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
+ state = !state;
+ gpio_direction_output(sw->gpio, state);
+ }
r = 0;
r |= device_create_file(&sw->pdev.dev, &dev_attr_state);
diff --git a/arch/arm/plat-omap/include/mach/gpio-switch.h b/arch/arm/plat-omap/include/mach/gpio-switch.h
index a143253..2096780 100644
--- a/arch/arm/plat-omap/include/mach/gpio-switch.h
+++ b/arch/arm/plat-omap/include/mach/gpio-switch.h
@@ -24,11 +24,12 @@
* low -> inactive
*
*/
-#define OMAP_GPIO_SWITCH_TYPE_COVER 0x0000
-#define OMAP_GPIO_SWITCH_TYPE_CONNECTION 0x0001
-#define OMAP_GPIO_SWITCH_TYPE_ACTIVITY 0x0002
-#define OMAP_GPIO_SWITCH_FLAG_INVERTED 0x0001
-#define OMAP_GPIO_SWITCH_FLAG_OUTPUT 0x0002
+#define OMAP_GPIO_SWITCH_TYPE_COVER 0x0000
+#define OMAP_GPIO_SWITCH_TYPE_CONNECTION 0x0001
+#define OMAP_GPIO_SWITCH_TYPE_ACTIVITY 0x0002
+#define OMAP_GPIO_SWITCH_FLAG_INVERTED 0x0001
+#define OMAP_GPIO_SWITCH_FLAG_OUTPUT 0x0002
+#define OMAP_GPIO_SWITCH_FLAG_OUTPUT_INIT_ACTIVE 0x0004
struct omap_gpio_switch {
const char *name;
--
1.6.0.4
--
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