[PATCH 4/4] mfd: 88pm800: Add support for clk subdevice

[Vaibhav Hiremath <vaibhav.hiremath@linaro.org>]

This patch adds mfd_cell/clk-subdevice for 88PM800 MFD
(and family of devices).

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
---
 drivers/mfd/88pm800.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index f104a32..9723eac 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -173,6 +173,14 @@ static const struct mfd_cell regulator_devs[] = {
 	},
 };
 
+static struct mfd_cell clk_devs[] = {
+	{
+	 .name = "88pm80x-clk",
+	 .of_compatible = "marvell,88pm800-clk",
+	 .id = -1,
+	},
+};
+
 static const struct regmap_irq pm800_irqs[] = {
 	/* INT0 */
 	[PM800_IRQ_ONKEY] = {
@@ -344,6 +352,17 @@ static int device_regulator_init(struct pm80x_chip *chip)
 			      ARRAY_SIZE(regulator_devs), NULL, 0, NULL);
 }
 
+static int device_clk_init(struct pm80x_chip *chip)
+{
+	if (chip->type == CHIP_PM800)
+		clk_devs[0].name = "88pm800-clk";
+	else if (chip->type == CHIP_PM860)
+		clk_devs[0].name = "88pm860-clk";
+
+	return mfd_add_devices(chip->dev, 0, &clk_devs[0],
+			      ARRAY_SIZE(clk_devs), NULL, 0, NULL);
+}
+
 static int device_irq_init_800(struct pm80x_chip *chip)
 {
 	struct regmap *map = chip->regmap;
@@ -513,6 +532,12 @@ static int device_800_init(struct pm80x_chip *chip)
 		goto out;
 	}
 
+	ret = device_clk_init(chip);
+	if (ret) {
+		dev_err(chip->dev, "Failed to add clk subdev\n");
+		goto out;
+	}
+
 	return 0;
 out_dev:
 	mfd_remove_devices(chip->dev);
-- 
1.9.1