From mboxrd@z Thu Jan 1 00:00:00 1970 From: martin.blumenstingl@googlemail.com (Martin Blumenstingl) Date: Sun, 15 Jan 2017 23:42:21 +0100 Subject: [PATCH v2 4/4] ARM64: dts: meson: meson-gx: add the SAR ADC In-Reply-To: <20170115224221.15510-1-martin.blumenstingl@googlemail.com> References: <20170111174334.24343-1-martin.blumenstingl@googlemail.com> <20170115224221.15510-1-martin.blumenstingl@googlemail.com> Message-ID: <20170115224221.15510-5-martin.blumenstingl@googlemail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add the SAR ADC to meson-gxbb.dtsi and meson-gxl.dtsi. GXBB provides a 10-bit ADC while GXL (and GXM, which uses the same ADC as GXL) provides a 12-bit ADC. Some boards use resistor ladder buttons connected through one of the ADC channels. On newer devices (GXL and GXM) some boards use pull-ups/downs to change the resistance (and thus the ADC value) on of the ADC channels to indicate the board revision. Signed-off-by: Martin Blumenstingl --- arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 8 ++++++++ arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 10 ++++++++++ arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 10 ++++++++++ 3 files changed, 28 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi index cddad8c795ec..041e4f0ed7d7 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi @@ -237,6 +237,14 @@ status = "disabled"; }; + saradc: adc at 8680 { + compatible = "amlogic,meson-saradc"; + #io-channel-cells = <1>; + status = "disabled"; + reg = <0x0 0x8680 0x0 0x34>; + interrupts = ; + }; + pwm_ef: pwm at 86c0 { compatible = "amlogic,meson-gx-pwm", "amlogic,meson-gxbb-pwm"; reg = <0x0 0x086c0 0x0 0x10>; diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi index 5d686334f692..114d7e1c9fc0 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi @@ -429,6 +429,16 @@ clocks = <&clkc CLKID_I2C>; }; +&saradc { + compatible = "amlogic,meson-gxbb-saradc", "amlogic,meson-saradc"; + clocks = <&xtal>, + <&clkc CLKID_SAR_ADC>, + <&clkc CLKID_SANA>, + <&clkc CLKID_SAR_ADC_CLK>, + <&clkc CLKID_SAR_ADC_SEL>; + clock-names = "clkin", "core", "sana", "adc_clk", "adc_sel"; +}; + &sd_emmc_a { clocks = <&clkc CLKID_SD_EMMC_A>, <&xtal>, diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi index bb2842f8a08f..6b63296b6c60 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi @@ -273,6 +273,16 @@ clocks = <&clkc CLKID_I2C>; }; +&saradc { + compatible = "amlogic,meson-gxl-saradc", "amlogic,meson-saradc"; + clocks = <&xtal>, + <&clkc CLKID_SAR_ADC>, + <&clkc CLKID_SANA>, + <&clkc CLKID_SAR_ADC_CLK>, + <&clkc CLKID_SAR_ADC_SEL>; + clock-names = "clkin", "core", "sana", "adc_clk", "adc_sel"; +}; + &sd_emmc_a { clocks = <&clkc CLKID_SD_EMMC_A>, <&xtal>, -- 2.11.0