From: djkurtz@chromium.org (Daniel Kurtz)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 2/2] arm64: dts: mt8173: Add I2C device node
Date: Thu, 18 Jun 2015 23:16:32 +0800 [thread overview]
Message-ID: <CAGS+omCVFwHndKSN0A7PrYUArfPLfCoL6iiSJYEik1PVkMBrKA@mail.gmail.com> (raw)
In-Reply-To: <1434553683-11651-3-git-send-email-eddie.huang@mediatek.com>
On Wed, Jun 17, 2015 at 11:08 PM, Eddie Huang <eddie.huang@mediatek.com> wrote:
> Add MT8173 I2C device nodes, include I2C controllers and pins.
> MT8173 has six I2C controllers, from i2c0 to i2c6, exclude i2c5.
> The 6th I2C controller register base doesn't next to 5th I2C,
> and there is a hardware between 5th and 6th I2C controller. So
> SoC designer name 6th controller as "i2c6", not "i2c5".
>
> Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
> ---
> arch/arm64/boot/dts/mediatek/mt8173.dtsi | 144 +++++++++++++++++++++++++++++++
> 1 file changed, 144 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> index b52ec43..1816c8f 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> @@ -158,6 +158,54 @@
> interrupts = <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>;
> +
> + i2c0_pins_a: i2c0 {
> + pins1 {
> + pinmux = <MT8173_PIN_45_SDA0__FUNC_SDA0>,
> + <MT8173_PIN_46_SCL0__FUNC_SCL0>;
> + bias-disable;
> + };
> + };
> +
> + i2c1_pins_a: i2c1 {
> + pins1 {
> + pinmux = <MT8173_PIN_125_SDA1__FUNC_SDA1>,
> + <MT8173_PIN_126_SCL1__FUNC_SCL1>;
> + bias-disable;
> + };
> + };
> +
> + i2c2_pins_a: i2c2 {
> + pins1 {
> + pinmux = <MT8173_PIN_43_SDA2__FUNC_SDA2>,
> + <MT8173_PIN_44_SCL2__FUNC_SCL2>;
> + bias-disable;
> + };
> + };
> +
> + i2c3_pins_a: i2c3 {
> + pins1 {
> + pinmux = <MT8173_PIN_106_SDA3__FUNC_SDA3>,
> + <MT8173_PIN_107_SCL3__FUNC_SCL3>;
> + bias-disable;
> + };
> + };
> +
> + i2c4_pins_a: i2c4 {
> + pins1 {
> + pinmux = <MT8173_PIN_133_SDA4__FUNC_SDA4>,
> + <MT8173_PIN_134_SCL4__FUNC_SCL4>;
> + bias-disable;
> + };
> + };
> +
> + i2c6_pins_a: i2c6 {
> + pins1 {
> + pinmux = <MT8173_PIN_100_MSDC2_DAT0__FUNC_SDA5>,
> + <MT8173_PIN_101_MSDC2_DAT1__FUNC_SCL5>;
> + bias-disable;
> + };
> + };
> };
>
> watchdog: watchdog at 10007000 {
> @@ -229,6 +277,102 @@
> clocks = <&uart_clk>;
> status = "disabled";
> };
> +
> + i2c0: i2c at 11007000 {
> + compatible = "mediatek,mt8173-i2c";
> + reg = <0 0x11007000 0 0x70>,
> + <0 0x11000100 0 0x80>;
> + interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_LOW>;
> + clock-div = <16>;
According to the i2c-mt6577 dt binding:
- clock-div: the fixed value for frequency divider of clock source in i2c
module. Each IC may be different.
For other drivers I've seen this kind of hardware-specific value
implemented as a table in the driver that is indexed based on the
compatible.
Any particular reason to specify it here in every device tree node instead?
-Dan
> + clocks = <&pericfg CLK_PERI_I2C0>,
> + <&pericfg CLK_PERI_AP_DMA>;
> + clock-names = "main", "dma";
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c0_pins_a>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> + i2c1: i2c at 11008000 {
> + compatible = "mediatek,mt8173-i2c";
> + reg = <0 0x11008000 0 0x70>,
> + <0 0x11000180 0 0x80>;
> + interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_LOW>;
> + clock-div = <16>;
> + clocks = <&pericfg CLK_PERI_I2C1>,
> + <&pericfg CLK_PERI_AP_DMA>;
> + clock-names = "main", "dma";
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c1_pins_a>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> + i2c2: i2c at 11009000 {
> + compatible = "mediatek,mt8173-i2c";
> + reg = <0 0x11009000 0 0x70>,
> + <0 0x11000200 0 0x80>;
> + interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_LOW>;
> + clock-div = <16>;
> + clocks = <&pericfg CLK_PERI_I2C2>,
> + <&pericfg CLK_PERI_AP_DMA>;
> + clock-names = "main", "dma";
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c2_pins_a>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> + i2c3: i2c3 at 11010000 {
> + compatible = "mediatek,mt8173-i2c";
> + reg = <0 0x11010000 0 0x70>,
> + <0 0x11000280 0 0x80>;
> + interrupts = <GIC_SPI 79 IRQ_TYPE_LEVEL_LOW>;
> + clock-div = <16>;
> + clocks = <&pericfg CLK_PERI_I2C3>,
> + <&pericfg CLK_PERI_AP_DMA>;
> + clock-names = "main", "dma";
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c3_pins_a>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> + i2c4: i2c4 at 11011000 {
> + compatible = "mediatek,mt8173-i2c";
> + reg = <0 0x11011000 0 0x70>,
> + <0 0x11000300 0 0x80>;
> + interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_LOW>;
> + clock-div = <16>;
> + clocks = <&pericfg CLK_PERI_I2C4>,
> + <&pericfg CLK_PERI_AP_DMA>;
> + clock-names = "main", "dma";
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c4_pins_a>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> + i2c6: i2c6 at 11013000 {
> + compatible = "mediatek,mt8173-i2c";
> + reg = <0 0x11013000 0 0x70>,
> + <0 0x11000080 0 0x80>;
> + interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_LOW>;
> + clock-div = <16>;
> + clocks = <&pericfg CLK_PERI_I2C6>,
> + <&pericfg CLK_PERI_AP_DMA>;
> + clock-names = "main", "dma";
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c6_pins_a>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> };
>
> };
> --
> 1.8.1.1.dirty
>
next prev parent reply other threads:[~2015-06-18 15:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-17 15:08 [PATCH v4 0/2] arm64: dts: Mediatek: MT8173 updtes Eddie Huang
2015-06-17 15:08 ` [PATCH v4 1/2] arm64: dts: mt8173: Add watchdog device node Eddie Huang
2015-06-17 15:08 ` [PATCH v4 2/2] arm64: dts: mt8173: Add I2C " Eddie Huang
2015-06-18 15:16 ` Daniel Kurtz [this message]
2015-06-22 3:36 ` Eddie Huang
2015-06-22 6:32 ` Daniel Kurtz
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