On 08/05/2016 03:36 PM, Lee Jones wrote:
> On Tue, 05 Jul 2016, Sylwester Nawrocki wrote:
>
>> This patch adds documentation of the DT bindings for the Samsung
>> Exynos SoC Low Power Audio Subsystem.
>>
>> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
>> new file mode 100644
>> index 0000000..7e97c0d
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/samsung,exynos5433-lpass.txt
>> @@ -0,0 +1,21 @@
>> +
>
> Nit: This line is superfluous.
>
>> +Samsung Exynos SoC Low Power Audio Subsystem (LPASS)
>> +
>> +Required properties:
>> +
>> + - compatible : "samsung,exynos5433-lpass"
>> + - reg : should contain the LPASS top SFR region location and size
>> + - samsung,pmu-syscon : the phandle to the Power Management Unit node
>> + - #address-cells: should be 1
>> + - #size-cells: should be 1
>> + - ranges: must be present
>
> These look so much better like:
>
> - compatible : "samsung,exynos5433-lpass"
> - reg : should contain the LPASS top SFR region location and size
> - samsung,pmu-syscon : the phandle to the Power Management Unit node
> - #address-cells : should be 1
> - #size-cells : should be 1
> - ranges : must be present
OK, will rewrite it this way.
>> +Each IP block of the Low Power Audio Subsystem should be specified
>> +as an optional sub-node. For "samsung,exynos5433-lpass" compatible
>> +this includes: UART, SLIMBUS, PCM, I2S, DMAC, Timers 0...4, WDT 0...1
>> +devices.
>> +
>> +Bindings of the sub-nodes are described in:
>> + Documentation/devicetree/bindings/serial/samsung_uart.txt
>> + Documentation/devicetree/bindings/sound/samsung-i2s.txt
>> + Documentation/devicetree/bindings/dma/arm-pl330.txt
>
> Use relative path names:
>
> ../serial/samsung_uart.txt
> ../sound/samsung-i2s.txt
> ../dma/arm-pl330.txt
OK, actually I had it this way in one of the versions but somehow
with full paths it appeared better to me.
> Missing example?
Yes, omitted deliberately as that appeared quite many more lines
with fully specified subnodes. Perhaps I will add it with omitted
all properties of the subnodes but compatible.
audio-subsystem {
compatible = "samsung,exynos5433-lpass";
reg = <0x11400000 0x100>, <0x11500000 0x08>;
samsung,pmu-syscon = <&pmu_system_controller>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
adma: adma@11420000 {
compatible = "arm,pl330", "arm,primecell";
reg = <0x11420000 0x1000>;
interrupts = <0 73 0>;
clocks = <&cmu_aud CLK_ACLK_DMAC>;
clock-names = "apb_pclk";
#dma-cells = <1>;
#dma-channels = <8>;
#dma-requests = <32>;
};
i2s0: i2s0@11440000 {
compatible = "samsung,exynos7-i2s";
reg = <0x11440000 0x100>;
dmas = <&adma 0 &adma 2>;
dma-names = "tx", "rx";
interrupts = <0 70 0>;
clocks = <&cmu_aud CLK_PCLK_AUD_I2S>,
<&cmu_aud CLK_SCLK_AUD_I2S>,
<&cmu_aud CLK_SCLK_I2S_BCLK>;
clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
pinctrl-names = "default";
pinctrl-0 = <&i2s0_bus>;
status = "disabled";
};
serial_3: serial@11460000 {
compatible = "samsung,exynos5433-uart";
reg = <0x11460000 0x100>;
interrupts = <0 67 0>;
clocks = <&cmu_aud CLK_PCLK_AUD_UART>,
<&cmu_aud CLK_SCLK_AUD_UART>;
clock-names = "uart", "clk_uart_baud0";
pinctrl-names = "default";
pinctrl-0 = <&uart_aud_bus>;
status = "disabled";
};
};
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