mfd/tc3589x: add block identifier for multiple child devices

Add block identifier to be able to add multiple mfd clients
to the mfd core

Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>

3 files changed, 31 insertions, 5 deletions

diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index 5c950261968e..060b23aab8e4 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -122,6 +122,7 @@ static struct tc3589x_gpio_platform_data mop500_tc35892_gpio_data = {
 };
 
 static struct tc3589x_platform_data mop500_tc35892_data = {
+        .block          = TC3589x_BLOCK_GPIO,
         .gpio           = &mop500_tc35892_gpio_data,
         .irq_base       = MOP500_EGPIO_IRQ_BASE,
 };
diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c
index 7deff53181d1..0ed9669d95fa 100644
--- a/drivers/mfd/tc3589x.c
+++ b/drivers/mfd/tc3589x.c
@@ -129,7 +129,7 @@ static struct resource gpio_resources[] = {
         },
 };
 
-static struct mfd_cell tc3589x_devs[] = {
+static struct mfd_cell tc3589x_dev_gpio[] = {
         {
                 .name           = "tc3589x-gpio",
                 .num_resources  = ARRAY_SIZE(gpio_resources),
@@ -240,6 +240,26 @@ static int tc3589x_chip_init(struct tc3589x *tc3589x)
         return tc3589x_reg_write(tc3589x, TC3589x_RSTINTCLR, 0x1);
 }
 
+static int __devinit tc3589x_device_init(struct tc3589x *tc3589x)
+{
+        int ret = 0;
+        unsigned int blocks = tc3589x->pdata->block;
+
+        if (blocks & TC3589x_BLOCK_GPIO) {
+                ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_dev_gpio,
+                                ARRAY_SIZE(tc3589x_dev_gpio), NULL,
+                                tc3589x->irq_base);
+                if (ret) {
+                        dev_err(tc3589x->dev, "failed to add gpio child\n");
+                        return ret;
+                }
+                dev_info(tc3589x->dev, "added gpio block\n");
+        }
+
+        return ret;
+
+}
+
 static int __devinit tc3589x_probe(struct i2c_client *i2c,
                                    const struct i2c_device_id *id)
 {
@@ -281,11 +301,9 @@ static int __devinit tc3589x_probe(struct i2c_client *i2c,
                 goto out_removeirq;
         }
 
-        ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_devs,
-                              ARRAY_SIZE(tc3589x_devs), NULL,
-                              tc3589x->irq_base);
+        ret = tc3589x_device_init(tc3589x);
         if (ret) {
-                dev_err(tc3589x->dev, "failed to add children\n");
+                dev_err(tc3589x->dev, "failed to add child devices\n");
                 goto out_freeirq;
         }
 
diff --git a/include/linux/mfd/tc3589x.h b/include/linux/mfd/tc3589x.h
index ea1918896f5b..da00958b12d9 100644
--- a/include/linux/mfd/tc3589x.h
+++ b/include/linux/mfd/tc3589x.h
@@ -9,6 +9,11 @@
 
 #include <linux/device.h>
 
+enum tx3589x_block {
+        TC3589x_BLOCK_GPIO        = 1 << 0,
+        TC3589x_BLOCK_KEYPAD      = 1 << 1,
+};
+
 #define TC3589x_RSTCTRL_IRQRST  (1 << 4)
 #define TC3589x_RSTCTRL_TIMRST  (1 << 3)
 #define TC3589x_RSTCTRL_ROTRST  (1 << 2)
@@ -122,10 +127,12 @@ struct tc3589x_gpio_platform_data {
 
 /**
  * struct tc3589x_platform_data - TC3589x platform data
+ * @block: bitmask of blocks to enable (use TC3589x_BLOCK_*)
  * @irq_base: base IRQ number.  %TC3589x_NR_IRQS irqs will be used.
  * @gpio: GPIO-specific platform data
  */
 struct tc3589x_platform_data {
+        unsigned int block;
         int irq_base;
         struct tc3589x_gpio_platform_data *gpio;
 };