gpio/omap: cleanup show revision, remove cpu_is checks, display only once

Remove cpu_is_* checks from gpio_show_revision() by passing in the
revision address offset from platform data.  SoCs with no revision
register (15xx, 7xx, and all MPUIOs) use -1 (actually, USHRT_MAX) to
signify no register.

While here, all GPIO banks are assumed to be the same revision, so fix
show_revision() to only show the revision for the first bank it finds.
This removes duplicate GPIO revision prints during boot.

Thanks to Charulatha V <charu@ti.com> for finding/fixing a few -1s
that were missed in the original patch.

Signed-off-by: Kevin Hilman <khilman@ti.com>

6 files changed, 15 insertions, 8 deletions

diff --git a/arch/arm/mach-omap1/gpio15xx.c b/arch/arm/mach-omap1/gpio15xx.c
index 91756245e860..f79c6aef11af 100644
--- a/arch/arm/mach-omap1/gpio15xx.c
+++ b/arch/arm/mach-omap1/gpio15xx.c
@@ -35,6 +35,7 @@ static struct __initdata resource omap15xx_mpu_gpio_resources[] = {
 };
 
 static struct omap_gpio_reg_offs omap15xx_mpuio_regs = {
+        .revision       = USHRT_MAX,
         .direction      = OMAP_MPUIO_IO_CNTL,
         .datain         = OMAP_MPUIO_INPUT_LATCH,
         .dataout        = OMAP_MPUIO_OUTPUT,
@@ -75,6 +76,7 @@ static struct __initdata resource omap15xx_gpio_resources[] = {
 };
 
 static struct omap_gpio_reg_offs omap15xx_gpio_regs = {
+        .revision       = USHRT_MAX,
         .direction      = OMAP1510_GPIO_DIR_CONTROL,
         .datain         = OMAP1510_GPIO_DATA_INPUT,
         .dataout        = OMAP1510_GPIO_DATA_OUTPUT,
diff --git a/arch/arm/mach-omap1/gpio16xx.c b/arch/arm/mach-omap1/gpio16xx.c
index a6d4a71ea4af..c69b3b104286 100644
--- a/arch/arm/mach-omap1/gpio16xx.c
+++ b/arch/arm/mach-omap1/gpio16xx.c
@@ -38,6 +38,7 @@ static struct __initdata resource omap16xx_mpu_gpio_resources[] = {
 };
 
 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
+        .revision       = USHRT_MAX,
         .direction      = OMAP_MPUIO_IO_CNTL,
         .datain         = OMAP_MPUIO_INPUT_LATCH,
         .dataout        = OMAP_MPUIO_OUTPUT,
@@ -78,6 +79,7 @@ static struct __initdata resource omap16xx_gpio1_resources[] = {
 };
 
 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
+        .revision       = OMAP1610_GPIO_REVISION,
         .direction      = OMAP1610_GPIO_DIRECTION,
         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
diff --git a/arch/arm/mach-omap1/gpio7xx.c b/arch/arm/mach-omap1/gpio7xx.c
index 12bcd9f2864a..d7f2ad3e6ac7 100644
--- a/arch/arm/mach-omap1/gpio7xx.c
+++ b/arch/arm/mach-omap1/gpio7xx.c
@@ -40,6 +40,7 @@ static struct __initdata resource omap7xx_mpu_gpio_resources[] = {
 };
 
 static struct omap_gpio_reg_offs omap7xx_mpuio_regs = {
+        .revision       = USHRT_MAX,
         .direction      = OMAP_MPUIO_IO_CNTL / 2,
         .datain         = OMAP_MPUIO_INPUT_LATCH / 2,
         .dataout        = OMAP_MPUIO_OUTPUT / 2,
@@ -80,6 +81,7 @@ static struct __initdata resource omap7xx_gpio1_resources[] = {
 };
 
 static struct omap_gpio_reg_offs omap7xx_gpio_regs = {
+        .revision       = USHRT_MAX,
         .direction      = OMAP7XX_GPIO_DIR_CONTROL,
         .datain         = OMAP7XX_GPIO_DATA_INPUT,
         .dataout        = OMAP7XX_GPIO_DATA_OUTPUT,
diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
index 316d930651f1..9a46d7773a48 100644
--- a/arch/arm/mach-omap2/gpio.c
+++ b/arch/arm/mach-omap2/gpio.c
@@ -71,6 +71,7 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
         case 0:
         case 1:
                 pdata->bank_type = METHOD_GPIO_24XX;
+                pdata->regs->revision = OMAP24XX_GPIO_REVISION;
                 pdata->regs->direction = OMAP24XX_GPIO_OE;
                 pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
                 pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
@@ -86,6 +87,7 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
                 break;
         case 2:
                 pdata->bank_type = METHOD_GPIO_44XX;
+                pdata->regs->revision = OMAP4_GPIO_REVISION;
                 pdata->regs->direction = OMAP4_GPIO_OE;
                 pdata->regs->datain = OMAP4_GPIO_DATAIN;
                 pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
index 7a3f067ee532..91e8de3db085 100644
--- a/arch/arm/plat-omap/include/plat/gpio.h
+++ b/arch/arm/plat-omap/include/plat/gpio.h
@@ -175,6 +175,7 @@ struct omap_gpio_dev_attr {
 };
 
 struct omap_gpio_reg_offs {
+        u16 revision;
         u16 direction;
         u16 datain;
         u16 dataout;
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index f212d236f908..501ca3d6a49e 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -984,19 +984,17 @@ static int gpio_2irq(struct gpio_chip *chip, unsigned offset)
 
 static void __init omap_gpio_show_rev(struct gpio_bank *bank)
 {
+        static bool called;
         u32 rev;
 
-        if (cpu_is_omap16xx() && !(bank->method != METHOD_MPUIO))
-                rev = __raw_readw(bank->base + OMAP1610_GPIO_REVISION);
-        else if (cpu_is_omap24xx() || cpu_is_omap34xx())
-                rev = __raw_readl(bank->base + OMAP24XX_GPIO_REVISION);
-        else if (cpu_is_omap44xx())
-                rev = __raw_readl(bank->base + OMAP4_GPIO_REVISION);
-        else
+        if (called || bank->regs->revision == USHRT_MAX)
                 return;
 
-        printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
+        rev = __raw_readw(bank->base + bank->regs->revision);
+        pr_info("OMAP GPIO hardware version %d.%d\n",
                 (rev >> 4) & 0x0f, rev & 0x0f);
+
+        called = true;
 }
 
 /* This lock class tells lockdep that GPIO irqs are in a different