From: Charulatha V <charu@xxxxxx>
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, make use
of a flag "loses_context" 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@xxxxxx>
Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxx>
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/mach-omap2/gpio.c | 7 +++++++
arch/arm/plat-omap/gpio.c | 12 ++++++------
arch/arm/plat-omap/include/plat/gpio.h | 1 +
3 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
index 487b49a..0782e06 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 struct omap_device_pm_latency omap_gpio_latency[] = {
[0] = {
.deactivate_func = omap_device_idle_hwmods,
@@ -39,6 +41,7 @@ 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
@@ -131,6 +134,10 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
kfree(pdata);
return -EINVAL;
}
+
+ pwrdm = omap_hwmod_get_pwrdm(oh);
+ pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
+
od = omap_device_build(name, id - 1, oh, pdata,
sizeof(*pdata), omap_gpio_latency,
ARRAY_SIZE(omap_gpio_latency),
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 0b76475..0ebeaaa 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -58,6 +58,7 @@ struct gpio_bank {
u32 dbck_enable_mask;
struct device *dev;
bool dbck_flag;
+ bool loses_context;
int stride;
u32 width;
u16 id;
@@ -1166,6 +1167,7 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
bank->stride = pdata->bank_stride;
bank->width = pdata->bank_width;
bank->non_wakeup_gpios = pdata->non_wakeup_gpios;
+ bank->loses_context = pdata->loses_context;
bank->regs = pdata->regs;
@@ -1331,8 +1333,7 @@ void omap2_gpio_prepare_for_idle(int off_mode)
u32 l1 = 0, l2 = 0;
int j;
- /* TODO: Do not use cpu_is_omap34xx */
- if ((cpu_is_omap34xx()) && (bank->id == 0))
+ if (!bank->loses_context)
continue;
for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
@@ -1399,8 +1400,7 @@ void omap2_gpio_resume_after_idle(void)
u32 l = 0, gen, gen0, gen1;
int j;
- /* TODO: Do not use cpu_is_omap34xx */
- if ((cpu_is_omap34xx()) && (bank->id == 0))
+ if (!bank->loses_context)
continue;
for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
@@ -1501,7 +1501,7 @@ void omap_gpio_save_context(void)
list_for_each_entry(bank, &omap_gpio_list, node) {
i++;
- if (bank->id == 0)
+ if (!bank->loses_context)
continue;
gpio_context[i].irqenable1 =
@@ -1536,7 +1536,7 @@ void omap_gpio_restore_context(void)
list_for_each_entry(bank, &omap_gpio_list, node) {
i++;
- if (bank->id == 0)
+ if (!bank->loses_context)
continue;
__raw_writel(gpio_context[i].irqenable1,
diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
index ad9e668..64b1ee7 100644
--- a/arch/arm/plat-omap/include/plat/gpio.h
+++ b/arch/arm/plat-omap/include/plat/gpio.h
@@ -199,6 +199,7 @@ struct omap_gpio_platform_data {
int bank_width; /* GPIO bank width */
int bank_stride; /* Only needed for omap1 MPUIO */
bool dbck_flag; /* dbck required or not - True for OMAP3&4 */
+ bool loses_context; /* whether the bank would ever lose context */
u32 non_wakeup_gpios;
struct omap_gpio_reg_offs *regs;
--
1.7.1
--
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