[PATCH 01/10] 34XX: PM: Workaround for taking care of gpio clocks

[Jouni Hogander <jouni.hogander@xxxxxxxxx>]

In omap3 gpios 2-6 are in per domain. Clocks for these should be
disabled. This patch is needed until gpio driver disables gpio clocks
when they are not needed.

Signed-off-by: Jouni Hogander <jouni.hogander@xxxxxxxxx>
---
 arch/arm/mach-omap2/pm34xx.c |   48 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 47 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index a1bfb30..1826dcd 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -52,6 +52,34 @@ static void (*saved_idle)(void);
 
 static struct powerdomain *mpu_pwrdm;
 
+/* XXX This is for gpio fclk hack. Will be removed as gpio driver
+ * handles fcks correctly */
+#define NUM_OF_PERGPIOS 5
+static struct clk *gpio_fcks[NUM_OF_PERGPIOS];
+static struct clk *gpio_icks[NUM_OF_PERGPIOS];
+
+/* XXX This is for gpio fclk hack. Will be removed as gpio driver
+ * handles fcks correctly */
+static void per_gpio_clk_enable(void)
+{
+	int i;
+	for (i = 1; i < NUM_OF_PERGPIOS + 1; i++) {
+		clk_enable(gpio_icks[i-1]);
+		clk_enable(gpio_fcks[i-1]);
+	}
+}
+
+/* XXX This is for gpio fclk hack. Will be removed as gpio driver
+ * handles fcks correctly */
+static void per_gpio_clk_disable(void)
+{
+	int i;
+	for (i = 1; i < NUM_OF_PERGPIOS + 1; i++) {
+		clk_disable(gpio_fcks[i-1]);
+		clk_disable(gpio_icks[i-1]);
+	}
+}
+
 /* PRCM Interrupt Handler for wakeups */
 static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
 {
@@ -165,8 +193,16 @@ static void omap_sram_idle(void)
 
 	omap2_gpio_prepare_for_retention();
 
+	/* XXX This is for gpio fclk hack. Will be removed as gpio driver
+	 * handles fcks correctly */
+	per_gpio_clk_disable();
+
 	_omap_sram_idle(NULL, save_state);
 
+	/* XXX This is for gpio fclk hack. Will be removed as gpio driver
+	 * handles fcks correctly */
+	per_gpio_clk_enable();
+
 	omap2_gpio_resume_after_retention();
 }
 
@@ -340,7 +376,8 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm)
 int __init omap3_pm_init(void)
 {
 	struct power_state *pwrst;
-	int ret;
+	char clk_name[11];
+	int ret, i;
 
 	printk(KERN_ERR "Power Management for TI OMAP3.\n");
 
@@ -374,6 +411,15 @@ int __init omap3_pm_init(void)
 
 	pm_idle = omap3_pm_idle;
 
+	/* XXX This is for gpio fclk hack. Will be removed as gpio driver
+	 * handles fcks correctly */
+	for (i = 1; i < NUM_OF_PERGPIOS + 1; i++) {
+		sprintf(clk_name, "gpio%d_fck", i + 1);
+		gpio_fcks[i-1] = clk_get(NULL, clk_name);
+		sprintf(clk_name, "gpio%d_ick", i + 1);
+		gpio_icks[i-1] = clk_get(NULL, clk_name);
+	}
+
 err1:
 	return ret;
 err2:
-- 
1.5.5

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