[PATCH v3 4/9] mfd: sun6i-prcm: Add support for Allwinner A23 PRCM

[Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>]

The Allwinner A23 SoC has a PRCM unit like the previous A31 SoC.
The differences are the AR100 clock can no longer be modified,
the APB0 clock has different divisors, and some clock gates are
gone.

This patch adds a compatible with a modified subdevice list for
the A23.

Signed-off-by: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
---
 .../devicetree/bindings/mfd/sun6i-prcm.txt         |  2 +-
 drivers/mfd/sun6i-prcm.c                           | 30 ++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt b/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt
index 1f5a31f..03c5a55 100644
--- a/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt
+++ b/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt
@@ -4,7 +4,7 @@ PRCM is an MFD device exposing several Power Management related devices
 (like clks and reset controllers).
 
 Required properties:
- - compatible: "allwinner,sun6i-a31-prcm"
+ - compatible: "allwinner,sun6i-a31-prcm" or "allwinner,sun8i-a23-prcm"
  - reg: The PRCM registers range
 
 The prcm node may contain several subdevices definitions:
diff --git a/drivers/mfd/sun6i-prcm.c b/drivers/mfd/sun6i-prcm.c
index 718fc4d..283ab8d 100644
--- a/drivers/mfd/sun6i-prcm.c
+++ b/drivers/mfd/sun6i-prcm.c
@@ -76,16 +76,46 @@ static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
 	},
 };
 
+static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
+	{
+		.name = "sun8i-a23-apb0-clk",
+		.of_compatible = "allwinner,sun8i-a23-apb0-clk",
+		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
+		.resources = sun6i_a31_apb0_clk_res,
+	},
+	{
+		.name = "sun6i-a31-apb0-gates-clk",
+		.of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
+		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
+		.resources = sun6i_a31_apb0_gates_clk_res,
+	},
+	{
+		.name = "sun6i-a31-apb0-clock-reset",
+		.of_compatible = "allwinner,sun6i-a31-clock-reset",
+		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
+		.resources = sun6i_a31_apb0_rstc_res,
+	},
+};
+
 static const struct prcm_data sun6i_a31_prcm_data = {
 	.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
 	.subdevs = sun6i_a31_prcm_subdevs,
 };
 
+static const struct prcm_data sun8i_a23_prcm_data = {
+	.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
+	.subdevs = sun8i_a23_prcm_subdevs,
+};
+
 static const struct of_device_id sun6i_prcm_dt_ids[] = {
 	{
 		.compatible = "allwinner,sun6i-a31-prcm",
 		.data = &sun6i_a31_prcm_data,
 	},
+	{
+		.compatible = "allwinner,sun8i-a23-prcm",
+		.data = &sun8i_a23_prcm_data,
+	},
 	{ /* sentinel */ },
 };
 
-- 
2.0.1