[ARM] pxa/balloon3: PCF857x GPIO expander and LEDs

Add supported for PCF8574A GPIO expander and LEDs attached to it.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>

2 files changed, 92 insertions, 3 deletions

diff --git a/arch/arm/mach-pxa/balloon3.c b/arch/arm/mach-pxa/balloon3.c
index 91ad56d6e929..6f594bd410dd 100644
--- a/arch/arm/mach-pxa/balloon3.c
+++ b/arch/arm/mach-pxa/balloon3.c
@@ -26,6 +26,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/types.h>
+#include <linux/i2c/pcf857x.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -375,15 +376,65 @@ static struct gpio_led_platform_data balloon3_gpio_led_info = {
 
 static struct platform_device balloon3_leds = {
         .name   = "leds-gpio",
-        .id     = -1,
+        .id     = 0,
         .dev    = {
                 .platform_data  = &balloon3_gpio_led_info,
         }
 };
 
+struct gpio_led balloon3_pcf_gpio_leds[] = {
+        {
+                .name                   = "balloon3:green:led0",
+                .gpio                   = BALLOON3_PCF_GPIO_LED0,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:green:led1",
+                .gpio                   = BALLOON3_PCF_GPIO_LED1,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:orange:led2",
+                .gpio                   = BALLOON3_PCF_GPIO_LED2,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:orange:led3",
+                .gpio                   = BALLOON3_PCF_GPIO_LED3,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:orange:led4",
+                .gpio                   = BALLOON3_PCF_GPIO_LED4,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:orange:led5",
+                .gpio                   = BALLOON3_PCF_GPIO_LED5,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:red:led6",
+                .gpio                   = BALLOON3_PCF_GPIO_LED6,
+                .active_low             = 1,
+        }, {
+                .name                   = "balloon3:red:led7",
+                .gpio                   = BALLOON3_PCF_GPIO_LED7,
+                .active_low             = 1,
+        },
+};
+
+static struct gpio_led_platform_data balloon3_pcf_gpio_led_info = {
+        .leds           = balloon3_pcf_gpio_leds,
+        .num_leds       = ARRAY_SIZE(balloon3_pcf_gpio_leds),
+};
+
+static struct platform_device balloon3_pcf_leds = {
+        .name   = "leds-gpio",
+        .id     = 1,
+        .dev    = {
+                .platform_data  = &balloon3_pcf_gpio_led_info,
+        }
+};
+
 static void __init balloon3_leds_init(void)
 {
         platform_device_register(&balloon3_leds);
+        platform_device_register(&balloon3_pcf_leds);
 }
 #else
 static inline void balloon3_leds_init(void) {}
@@ -451,6 +502,34 @@ static void __init balloon3_init_irq(void)
 }
 
 /******************************************************************************
+ * GPIO expander
+ ******************************************************************************/
+#if defined(CONFIG_GPIO_PCF857X) || defined(CONFIG_GPIO_PCF857X_MODULE)
+static struct pcf857x_platform_data balloon3_pcf857x_pdata = {
+        .gpio_base      = BALLOON3_PCF_GPIO_BASE,
+        .n_latch        = 0,
+        .setup          = NULL,
+        .teardown       = NULL,
+        .context        = NULL,
+};
+
+static struct i2c_board_info __initdata balloon3_i2c_devs[] = {
+        {
+                I2C_BOARD_INFO("pcf8574a", 0x38),
+                .platform_data  = &balloon3_pcf857x_pdata,
+        },
+};
+
+static void __init balloon3_i2c_init(void)
+{
+        pxa_set_i2c_info(NULL);
+        i2c_register_board_info(0, ARRAY_AND_SIZE(balloon3_i2c_devs));
+}
+#else
+static inline void balloon3_i2c_init(void) {}
+#endif
+
+/******************************************************************************
  * Machine init
  ******************************************************************************/
 static void __init balloon3_init(void)
@@ -463,8 +542,7 @@ static void __init balloon3_init(void)
         pxa_set_btuart_info(NULL);
         pxa_set_stuart_info(NULL);
 
-        pxa_set_i2c_info(NULL);
-
+        balloon3_i2c_init();
         balloon3_irda_init();
         balloon3_lcd_init();
         balloon3_leds_init();
diff --git a/arch/arm/mach-pxa/include/mach/balloon3.h b/arch/arm/mach-pxa/include/mach/balloon3.h
index d5dcf750c1ef..238f887ebaea 100644
--- a/arch/arm/mach-pxa/include/mach/balloon3.h
+++ b/arch/arm/mach-pxa/include/mach/balloon3.h
@@ -69,6 +69,17 @@ enum balloon3_features {
 
 #define BALLOON3_GPIO_S0_CD             (105)
 
+/* PCF8574A Leds */
+#define BALLOON3_PCF_GPIO_BASE          160
+#define BALLOON3_PCF_GPIO_LED0          (BALLOON3_PCF_GPIO_BASE + 0)
+#define BALLOON3_PCF_GPIO_LED1          (BALLOON3_PCF_GPIO_BASE + 1)
+#define BALLOON3_PCF_GPIO_LED2          (BALLOON3_PCF_GPIO_BASE + 2)
+#define BALLOON3_PCF_GPIO_LED3          (BALLOON3_PCF_GPIO_BASE + 3)
+#define BALLOON3_PCF_GPIO_LED4          (BALLOON3_PCF_GPIO_BASE + 4)
+#define BALLOON3_PCF_GPIO_LED5          (BALLOON3_PCF_GPIO_BASE + 5)
+#define BALLOON3_PCF_GPIO_LED6          (BALLOON3_PCF_GPIO_BASE + 6)
+#define BALLOON3_PCF_GPIO_LED7          (BALLOON3_PCF_GPIO_BASE + 7)
+
 /* FPGA Interrupt Mask/Acknowledge Register */
 #define BALLOON3_INT_S0_IRQ             (1 << 0)  /* PCMCIA 0 IRQ */
 #define BALLOON3_INT_S0_STSCHG          (1 << 1)  /* PCMCIA 0 status changed */