[RFC 1/3] clk: sunxi: sun6i-apb0: Add support for sun9i A80 apbs gates

[wens@csie.org (Chen-Yu Tsai)]

This patch adds support for the PRCM apbs clock gates found on the
Allwinner A80 SoC.

The gate bitmask is not complete. The lowest 7 bits seem to be the
same as found on the A31, judging by Allwinner's kernel sources and
what was enabled by the bootloader. Bits 17 and 18 are documented
in the SDK sources.

This still leaves some peripherals missing, such as the dma controller,
a second i2c controller, and 2 PS/2 controllers.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 Documentation/devicetree/bindings/clock/sunxi.txt | 1 +
 drivers/clk/sunxi/clk-sun6i-apb0-gates.c          | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
index 0455cb9..15e44fa 100644
--- a/Documentation/devicetree/bindings/clock/sunxi.txt
+++ b/Documentation/devicetree/bindings/clock/sunxi.txt
@@ -56,6 +56,7 @@ Required properties:
 	"allwinner,sun6i-a31-apb2-div-clk" - for the APB2 gates on A31
 	"allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31
 	"allwinner,sun8i-a23-apb2-gates-clk" - for the APB2 gates on A23
+	"allwinner,sun9i-a80-apbs-gates-clk" - for the APBS gates on A80
 	"allwinner,sun5i-a13-mbus-clk" - for the MBUS clock on A13
 	"allwinner,sun4i-a10-mmc-output-clk" - for the MMC output clock on A10
 	"allwinner,sun4i-a10-mmc-sample-clk" - for the MMC sample clock on A10
diff --git a/drivers/clk/sunxi/clk-sun6i-apb0-gates.c b/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
index e10d052..1e3d6c8 100644
--- a/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
+++ b/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
@@ -29,9 +29,15 @@ static const struct gates_data sun8i_a23_apb0_gates __initconst = {
 	.mask = {0x5D},
 };
 
+/* XXX This is an imcomplete mask due to a lack of documents */
+static const struct gates_data sun9i_a80_apbs_gates __initconst = {
+	.mask = {0x6007f},
+};
+
 static const struct of_device_id sun6i_a31_apb0_gates_clk_dt_ids[] = {
 	{ .compatible = "allwinner,sun6i-a31-apb0-gates-clk", .data = &sun6i_a31_apb0_gates },
 	{ .compatible = "allwinner,sun8i-a23-apb0-gates-clk", .data = &sun8i_a23_apb0_gates },
+	{ .compatible = "allwinner,sun9i-a80-apbs-gates-clk", .data = &sun9i_a80_apbs_gates },
 	{ /* sentinel */ }
 };
 
-- 
2.1.1