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authorTomasz Figa <t.figa@samsung.com>2014-07-02 19:28:27 +0200
committerKukjin Kim <kgene.kim@samsung.com>2014-07-19 04:25:08 +0900
commit9978f28f695adb63fa1726744a7f95e12920e8c9 (patch)
treeb235bb8bc00105038d8b15dfca69d076586279cd /Documentation/devicetree/bindings/clock
parent32726d2d5502302ba5753854f5f2f12ba22681c4 (diff)
clk: samsung: Add S5PV210 Audio Subsystem clock driver
This patch adds a driver for clock controller being a part of Audio Subsystem present on S5PV210 and compatible SoCs. It is used to provide clocks for other IP blocks of this subsystem. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'Documentation/devicetree/bindings/clock')
-rw-r--r--Documentation/devicetree/bindings/clock/clk-s5pv210-audss.txt53
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diff --git a/Documentation/devicetree/bindings/clock/clk-s5pv210-audss.txt b/Documentation/devicetree/bindings/clock/clk-s5pv210-audss.txt
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+* Samsung Audio Subsystem Clock Controller
+
+The Samsung Audio Subsystem clock controller generates and supplies clocks
+to Audio Subsystem block available in the S5PV210 and compatible SoCs.
+
+Required Properties:
+
+- compatible: should be "samsung,s5pv210-audss-clock".
+- reg: physical base address and length of the controller's register set.
+
+- #clock-cells: should be 1.
+
+- clocks:
+ - hclk: AHB bus clock of the Audio Subsystem.
+ - xxti: Optional fixed rate PLL reference clock, parent of mout_audss. If
+ not specified (i.e. xusbxti is used for PLL reference), it is fixed to
+ a clock named "xxti".
+ - fout_epll: Input PLL to the AudioSS block, parent of mout_audss.
+ - iiscdclk0: Optional external i2s clock, parent of mout_i2s. If not
+ specified, it is fixed to a clock named "iiscdclk0".
+ - sclk_audio0: Audio bus clock, parent of mout_i2s.
+
+- clock-names: Aliases for the above clocks. They should be "hclk",
+ "xxti", "fout_epll", "iiscdclk0", and "sclk_audio0" respectively.
+
+All available clocks are defined as preprocessor macros in
+dt-bindings/clock/s5pv210-audss-clk.h header and can be used in device
+tree sources.
+
+Example: Clock controller node.
+
+ clk_audss: clock-controller@c0900000 {
+ compatible = "samsung,s5pv210-audss-clock";
+ reg = <0xc0900000 0x1000>;
+ #clock-cells = <1>;
+ clock-names = "hclk", "xxti",
+ "fout_epll", "sclk_audio0";
+ clocks = <&clocks DOUT_HCLKP>, <&xxti>,
+ <&clocks FOUT_EPLL>, <&clocks SCLK_AUDIO0>;
+ };
+
+Example: I2S controller node that consumes the clock generated by the clock
+ controller. Refer to the standard clock bindings for information
+ about 'clocks' and 'clock-names' property.
+
+ i2s0: i2s@03830000 {
+ /* ... */
+ clock-names = "iis", "i2s_opclk0",
+ "i2s_opclk1";
+ clocks = <&clk_audss CLK_I2S>, <&clk_audss CLK_I2S>,
+ <&clk_audss CLK_DOUT_AUD_BUS>;
+ /* ... */
+ };