gpio: omap: convert gpio irq functions to use GPIO offset

Convert GPIO IRQ functions to use GPIO offset instead of system
GPIO numbers. This allows to drop unneeded conversations between
system GPIO <-> GPIO offset which are done in many places and
many times.
It is safe to do now because:
- gpiolib always passes GPIO offset to GPIO controller
- OMAP GPIO driver converted to use IRQ domain, so
  struct irq_data->hwirq contains GPIO offset

This is preparation step before removing:
 #define GPIO_INDEX(bank, gpio)
 #define GPIO_BIT(bank, gpio)
 int omap_irq_to_gpio()

Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 34 insertions, 33 deletions

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index ff5d54dc9aee..628a1328e503 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -549,9 +549,10 @@ static void omap_clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
         readl_relaxed(reg);
 }
 
-static inline void omap_clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
+static inline void omap_clear_gpio_irqstatus(struct gpio_bank *bank,
+                                             unsigned offset)
 {
-        omap_clear_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
+        omap_clear_gpio_irqbank(bank, BIT(offset));
 }
 
 static u32 omap_get_gpio_irqbank_mask(struct gpio_bank *bank)
@@ -612,13 +613,13 @@ static void omap_disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
         writel_relaxed(l, reg);
 }
 
-static inline void omap_set_gpio_irqenable(struct gpio_bank *bank, int gpio,
-                                           int enable)
+static inline void omap_set_gpio_irqenable(struct gpio_bank *bank,
+                                           unsigned offset, int enable)
 {
         if (enable)
-                omap_enable_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
+                omap_enable_gpio_irqbank(bank, BIT(offset));
         else
-                omap_disable_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
+                omap_disable_gpio_irqbank(bank, BIT(offset));
 }
 
 /*
@@ -629,14 +630,16 @@ static inline void omap_set_gpio_irqenable(struct gpio_bank *bank, int gpio,
  * enabled. When system is suspended, only selected GPIO interrupts need
  * to have wake-up enabled.
  */
-static int omap_set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
+static int omap_set_gpio_wakeup(struct gpio_bank *bank, unsigned offset,
+                                int enable)
 {
-        u32 gpio_bit = GPIO_BIT(bank, gpio);
+        u32 gpio_bit = BIT(offset);
         unsigned long flags;
 
         if (bank->non_wakeup_gpios & gpio_bit) {
                 dev_err(bank->dev,
-                        "Unable to modify wakeup on non-wakeup GPIO%d\n", gpio);
+                        "Unable to modify wakeup on non-wakeup GPIO%d\n",
+                        offset);
                 return -EINVAL;
         }
 
@@ -652,22 +655,22 @@ static int omap_set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
         return 0;
 }
 
-static void omap_reset_gpio(struct gpio_bank *bank, int gpio)
+static void omap_reset_gpio(struct gpio_bank *bank, unsigned offset)
 {
-        omap_set_gpio_direction(bank, GPIO_INDEX(bank, gpio), 1);
-        omap_set_gpio_irqenable(bank, gpio, 0);
-        omap_clear_gpio_irqstatus(bank, gpio);
-        omap_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
-        omap_clear_gpio_debounce(bank, GPIO_INDEX(bank, gpio));
+        omap_set_gpio_direction(bank, offset, 1);
+        omap_set_gpio_irqenable(bank, offset, 0);
+        omap_clear_gpio_irqstatus(bank, offset);
+        omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
+        omap_clear_gpio_debounce(bank, offset);
 }
 
 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
 static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable)
 {
         struct gpio_bank *bank = omap_irq_data_get_bank(d);
-        unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
+        unsigned offset = d->hwirq;
 
-        return omap_set_gpio_wakeup(bank, gpio, enable);
+        return omap_set_gpio_wakeup(bank, offset, enable);
 }
 
 static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
@@ -705,7 +708,7 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
         spin_lock_irqsave(&bank->lock, flags);
         bank->mod_usage &= ~(BIT(offset));
         omap_disable_gpio_module(bank, offset);
-        omap_reset_gpio(bank, bank->chip.base + offset);
+        omap_reset_gpio(bank, offset);
         spin_unlock_irqrestore(&bank->lock, flags);
 
         /*
@@ -819,14 +822,13 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d)
 static void omap_gpio_irq_shutdown(struct irq_data *d)
 {
         struct gpio_bank *bank = omap_irq_data_get_bank(d);
-        unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
         unsigned long flags;
-        unsigned offset = GPIO_INDEX(bank, gpio);
+        unsigned offset = d->hwirq;
 
         spin_lock_irqsave(&bank->lock, flags);
         bank->irq_usage &= ~(BIT(offset));
         omap_disable_gpio_module(bank, offset);
-        omap_reset_gpio(bank, gpio);
+        omap_reset_gpio(bank, offset);
         spin_unlock_irqrestore(&bank->lock, flags);
 
         /*
@@ -840,43 +842,42 @@ static void omap_gpio_irq_shutdown(struct irq_data *d)
 static void omap_gpio_ack_irq(struct irq_data *d)
 {
         struct gpio_bank *bank = omap_irq_data_get_bank(d);
-        unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
+        unsigned offset = d->hwirq;
 
-        omap_clear_gpio_irqstatus(bank, gpio);
+        omap_clear_gpio_irqstatus(bank, offset);
 }
 
 static void omap_gpio_mask_irq(struct irq_data *d)
 {
         struct gpio_bank *bank = omap_irq_data_get_bank(d);
-        unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
+        unsigned offset = d->hwirq;
         unsigned long flags;
 
         spin_lock_irqsave(&bank->lock, flags);
-        omap_set_gpio_irqenable(bank, gpio, 0);
-        omap_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
+        omap_set_gpio_irqenable(bank, offset, 0);
+        omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
         spin_unlock_irqrestore(&bank->lock, flags);
 }
 
 static void omap_gpio_unmask_irq(struct irq_data *d)
 {
         struct gpio_bank *bank = omap_irq_data_get_bank(d);
-        unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
-        unsigned int irq_mask = GPIO_BIT(bank, gpio);
+        unsigned offset = d->hwirq;
         u32 trigger = irqd_get_trigger_type(d);
         unsigned long flags;
 
         spin_lock_irqsave(&bank->lock, flags);
         if (trigger)
-                omap_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), trigger);
+                omap_set_gpio_triggering(bank, offset, trigger);
 
         /* For level-triggered GPIOs, the clearing must be done after
          * the HW source is cleared, thus after the handler has run */
-        if (bank->level_mask & irq_mask) {
-                omap_set_gpio_irqenable(bank, gpio, 0);
-                omap_clear_gpio_irqstatus(bank, gpio);
+        if (bank->level_mask & BIT(offset)) {
+                omap_set_gpio_irqenable(bank, offset, 0);
+                omap_clear_gpio_irqstatus(bank, offset);
         }
 
-        omap_set_gpio_irqenable(bank, gpio, 1);
+        omap_set_gpio_irqenable(bank, offset, 1);
         spin_unlock_irqrestore(&bank->lock, flags);
 }