gpio/omap: use flag to identify wakeup domain

In omap3, save/restore context is implemented for GPIO banks 2-6 as GPIO bank1
is in wakeup domain. Instead of identifying bank's power domain by bank id,
use 'loses_context' flag which is filled by pwrdm_can_ever_lose_context()
during dev_init.

For getting the powerdomain pointer, omap_hwmod_get_pwrdm() is used.
omap_device_get_pwrdm() could not be used as the pwrdm information needs to be
filled in pdata, whereas omap_device_get_pwrdm() could be used only after
omap_device_build() call.

Signed-off-by: Charulatha V <charu@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
index 07ac64850746..076be342ad28 100644
--- a/arch/arm/mach-omap2/gpio.c
+++ b/arch/arm/mach-omap2/gpio.c
@@ -24,6 +24,8 @@
 #include <plat/omap_hwmod.h>
 #include <plat/omap_device.h>
 
+#include "powerdomain.h"
+
 static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
 {
         struct platform_device *pdev;
@@ -31,6 +33,7 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
         struct omap_gpio_dev_attr *dev_attr;
         char *name = "omap_gpio";
         int id;
+        struct powerdomain *pwrdm;
 
         /*
          * extract the device id from name field available in the
@@ -99,6 +102,9 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
                 return -EINVAL;
         }
 
+        pwrdm = omap_hwmod_get_pwrdm(oh);
+        pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
+
         pdev = omap_device_build(name, id - 1, oh, pdata,
                                 sizeof(*pdata), NULL, 0, false);
         kfree(pdata);