clk: sunxi: Add Allwinner A20 gates

The Allwinner A20 is almost identical to the earlier A10 SoC from
Allwinner on many aspects, including the clocks tree. However, since the
A20 has some additionnal IPs compared to the A10, the clock tree isn't
exactly the same, especially when it comes to the gated clocks
available. We thus need to register different clock gates for the A20.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Emilio López <emilio@elopez.com.ar>

Documentation/devicetree/bindings/clock/sunxi.txt

@@ -16,18 +16,21 @@ Required properties:
 	"allwinner,sun4i-ahb-gates-clk" - for the AHB gates on A10
 	"allwinner,sun5i-a13-ahb-gates-clk" - for the AHB gates on A13
 	"allwinner,sun5i-a10s-ahb-gates-clk" - for the AHB gates on A10s
+	"allwinner,sun7i-a20-ahb-gates-clk" - for the AHB gates on A20
 	"allwinner,sun6i-a31-ahb1-mux-clk" - for the AHB1 multiplexer on A31
 	"allwinner,sun6i-a31-ahb1-gates-clk" - for the AHB1 gates on A31
 	"allwinner,sun4i-apb0-clk" - for the APB0 clock
 	"allwinner,sun4i-apb0-gates-clk" - for the APB0 gates on A10
 	"allwinner,sun5i-a13-apb0-gates-clk" - for the APB0 gates on A13
 	"allwinner,sun5i-a10s-apb0-gates-clk" - for the APB0 gates on A10s
+	"allwinner,sun7i-a20-apb0-gates-clk" - for the APB0 gates on A20
 	"allwinner,sun4i-apb1-clk" - for the APB1 clock
 	"allwinner,sun4i-apb1-mux-clk" - for the APB1 clock muxing
 	"allwinner,sun4i-apb1-gates-clk" - for the APB1 gates on A10
 	"allwinner,sun5i-a13-apb1-gates-clk" - for the APB1 gates on A13
 	"allwinner,sun5i-a10s-apb1-gates-clk" - for the APB1 gates on A10s
 	"allwinner,sun6i-a31-apb1-gates-clk" - for the APB1 gates on A31
+	"allwinner,sun7i-a20-apb1-gates-clk" - for the APB1 gates on A20
 	"allwinner,sun6i-a31-apb2-div-clk" - for the APB2 gates on A31
 	"allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31
 

Documentation/devicetree/bindings/clock/sunxi/sun7i-a20-gates.txt

+Gate clock outputs
+------------------
+
+  * AXI gates ("allwinner,sun4i-axi-gates-clk")
+
+    DRAM					0
+
+  * AHB gates ("allwinner,sun7i-a20-ahb-gates-clk")
+
+    USB0					0
+    EHCI0					1
+    OHCI0					2
+    EHCI1					3
+    OHCI1					4
+    SS						5
+    DMA						6
+    BIST					7
+    MMC0					8
+    MMC1					9
+    MMC2					10
+    MMC3					11
+    MS						12
+    NAND					13
+    SDRAM					14
+
+    ACE						16
+    EMAC					17
+    TS						18
+
+    SPI0					20
+    SPI1					21
+    SPI2					22
+    SPI3					23
+
+    SATA					25
+
+    HSTIMER					28
+
+    VE						32
+    TVD						33
+    TVE0					34
+    TVE1					35
+    LCD0					36
+    LCD1					37
+
+    CSI0					40
+    CSI1					41
+
+    HDMI1					42
+    HDMI0					43
+    DE_BE0					44
+    DE_BE1					45
+    DE_FE1					46
+    DE_FE1					47
+
+    GMAC					49
+    MP						50
+
+    MALI400					52
+
+  * APB0 gates ("allwinner,sun7i-a20-apb0-gates-clk")
+
+    CODEC					0
+    SPDIF					1
+    AC97					2
+    IIS0					3
+    IIS1					4
+    PIO						5
+    IR0						6
+    IR1						7
+    IIS2					8
+
+    KEYPAD					10
+
+  * APB1 gates ("allwinner,sun7i-a20-apb1-gates-clk")
+
+    I2C0					0
+    I2C1					1
+    I2C2					2
+    I2C3					3
+    CAN						4
+    SCR						5
+    PS20					6
+    PS21					7
+
+    I2C4					15
+    UART0					16
+    UART1					17
+    UART2					18
+    UART3					19
+    UART4					20
+    UART5					21
+    UART6					22
+    UART7					23
+
+Notation:
+ [*]:  The datasheet didn't mention these, but they are present on AW code
+ [**]: The datasheet had this marked as "NC" but they are used on AW code

drivers/clk/sunxi/clk-sunxi.c

@@ -463,6 +463,10 @@ static const __initconst struct gates_data sun6i_a31_ahb1_gates_data = {
 	.mask = {0xEDFE7F62, 0x794F931},
 };
 
+static const __initconst struct gates_data sun7i_a20_ahb_gates_data = {
+	.mask = { 0x12f77fff, 0x16ff3f },
+};
+
 static const __initconst struct gates_data sun4i_apb0_gates_data = {
 	.mask = {0x4EF},
 };
@@ -475,6 +479,10 @@ static const __initconst struct gates_data sun5i_a13_apb0_gates_data = {
 	.mask = {0x61},
 };
 
+static const __initconst struct gates_data sun7i_a20_apb0_gates_data = {
+	.mask = { 0x4ff },
+};
+
 static const __initconst struct gates_data sun4i_apb1_gates_data = {
 	.mask = {0xFF00F7},
 };
@@ -495,6 +503,10 @@ static const __initconst struct gates_data sun6i_a31_apb2_gates_data = {
 	.mask = {0x3F000F},
 };
 
+static const __initconst struct gates_data sun7i_a20_apb1_gates_data = {
+	.mask = { 0xff80ff },
+};
+
 static void __init sunxi_gates_clk_setup(struct device_node *node,
 					 struct gates_data *data)
 {
@@ -576,13 +588,16 @@ static const __initconst struct of_device_id clk_gates_match[] = {
 	{.compatible = "allwinner,sun5i-a10s-ahb-gates-clk", .data = &sun5i_a10s_ahb_gates_data,},
 	{.compatible = "allwinner,sun5i-a13-ahb-gates-clk", .data = &sun5i_a13_ahb_gates_data,},
 	{.compatible = "allwinner,sun6i-a31-ahb1-gates-clk", .data = &sun6i_a31_ahb1_gates_data,},
+	{.compatible = "allwinner,sun7i-a20-ahb-gates-clk", .data = &sun7i_a20_ahb_gates_data,},
 	{.compatible = "allwinner,sun4i-apb0-gates-clk", .data = &sun4i_apb0_gates_data,},
 	{.compatible = "allwinner,sun5i-a10s-apb0-gates-clk", .data = &sun5i_a10s_apb0_gates_data,},
 	{.compatible = "allwinner,sun5i-a13-apb0-gates-clk", .data = &sun5i_a13_apb0_gates_data,},
+	{.compatible = "allwinner,sun7i-a20-apb0-gates-clk", .data = &sun7i_a20_apb0_gates_data,},
 	{.compatible = "allwinner,sun4i-apb1-gates-clk", .data = &sun4i_apb1_gates_data,},
 	{.compatible = "allwinner,sun5i-a10s-apb1-gates-clk", .data = &sun5i_a10s_apb1_gates_data,},
 	{.compatible = "allwinner,sun5i-a13-apb1-gates-clk", .data = &sun5i_a13_apb1_gates_data,},
 	{.compatible = "allwinner,sun6i-a31-apb1-gates-clk", .data = &sun6i_a31_apb1_gates_data,},
+	{.compatible = "allwinner,sun7i-a20-apb1-gates-clk", .data = &sun7i_a20_apb1_gates_data,},
 	{.compatible = "allwinner,sun6i-a31-apb2-gates-clk", .data = &sun6i_a31_apb2_gates_data,},
 	{}
 };