Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 103 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt b/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
new file mode 100644
index 000000000..6030afb10
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
@@ -0,0 +1,103 @@
+* Samsung Audio Subsystem Clock Controller
+
+The Samsung Audio Subsystem clock controller generates and supplies clocks
+to Audio Subsystem block available in the S5PV210 and Exynos SoCs. The clock
+binding described here is applicable to all SoCs in Exynos family.
+
+Required Properties:
+
+- compatible: should be one of the following:
+  - "samsung,exynos4210-audss-clock" - controller compatible with all Exynos4 SoCs.
+  - "samsung,exynos5250-audss-clock" - controller compatible with Exynos5250
+    SoCs.
+  - "samsung,exynos5410-audss-clock" - controller compatible with Exynos5410
+    SoCs.
+  - "samsung,exynos5420-audss-clock" - controller compatible with Exynos5420
+    SoCs.
+- reg: physical base address and length of the controller's register set.
+
+- #clock-cells: should be 1.
+
+- clocks:
+  - pll_ref: Fixed rate PLL reference clock, parent of mout_audss. "fin_pll"
+    is used if not specified.
+  - pll_in: Input PLL to the AudioSS block, parent of mout_audss. "fout_epll"
+    is used if not specified.
+  - cdclk: External i2s clock, parent of mout_i2s. "cdclk0" is used if not
+    specified.
+  - sclk_audio: Audio bus clock, parent of mout_i2s. "sclk_audio0" is used if
+    not specified.
+  - sclk_pcm_in: PCM clock, parent of sclk_pcm.  "sclk_pcm0" is used if not
+    specified.
+
+- clock-names: Aliases for the above clocks. They should be "pll_ref",
+  "pll_in", "cdclk", "sclk_audio", and "sclk_pcm_in" respectively.
+
+Optional Properties:
+
+  - power-domains: a phandle to respective power domain node as described by
+    generic PM domain bindings (see power/power_domain.txt for more
+    information).
+
+The following is the list of clocks generated by the controller. Each clock is
+assigned an identifier and client nodes use this identifier to specify the
+clock which they consume. Some of the clocks are available only on a particular
+Exynos4 SoC and this is specified where applicable.
+
+Provided clocks:
+
+Clock           ID      SoC (if specific)
+-----------------------------------------------
+
+mout_audss      0
+mout_i2s        1
+dout_srp        2
+dout_aud_bus    3
+dout_i2s        4
+srp_clk         5
+i2s_bus         6
+sclk_i2s        7
+pcm_bus         8
+sclk_pcm        9
+adma            10      Exynos5420
+
+Example 1: An example of a clock controller node using the default input
+	   clock names is listed below.
+
+clock_audss: audss-clock-controller@3810000 {
+	compatible = "samsung,exynos5250-audss-clock";
+	reg = <0x03810000 0x0C>;
+	#clock-cells = <1>;
+};
+
+Example 2: An example of a clock controller node with the input clocks
+           specified.
+
+clock_audss: audss-clock-controller@3810000 {
+	compatible = "samsung,exynos5250-audss-clock";
+	reg = <0x03810000 0x0C>;
+	#clock-cells = <1>;
+	clocks = <&clock 1>, <&clock 7>, <&clock 138>, <&clock 160>,
+		<&ext_i2s_clk>;
+	clock-names = "pll_ref", "pll_in", "sclk_audio", "sclk_pcm_in", "cdclk";
+};
+
+Example 3: 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@3830000 {
+	compatible = "samsung,i2s-v5";
+	reg = <0x03830000 0x100>;
+	dmas = <&pdma0 10
+		&pdma0 9
+		&pdma0 8>;
+	dma-names = "tx", "rx", "tx-sec";
+	clocks = <&clock_audss EXYNOS_I2S_BUS>,
+		<&clock_audss EXYNOS_I2S_BUS>,
+		<&clock_audss EXYNOS_SCLK_I2S>,
+		<&clock_audss EXYNOS_MOUT_AUDSS>,
+		<&clock_audss EXYNOS_MOUT_I2S>;
+	clock-names = "iis", "i2s_opclk0", "i2s_opclk1",
+		      "mout_audss", "mout_i2s";
+};