Re: [PATCH] arm/dts: am335x-evmsk enable display and lcd panel support

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* Darren Etheridge <detheridge@xxxxxx> [140422 13:39]:
> Add the necessary nodes to enable the LCD controller and the
> LCD panel that is attached to the Texas Instruments AM335x
> EVMSK platform.  Also setup the necessary pin mux within the
> DT file to drive the LCD connector and add the correct
> pinmux settings for the lcd pins to be configured to when
> the SoC goes into sleep state for the minimum power
> consumption.
> 
> For the sleep mode LCD pin settings, MUX_MODE7 is chosen as
> this corresponds to switching the pins into input GPIO's with
> an internal pulldown.  Which has been determined to offer the
> lowest power solution vs leaving the pins configured in LCD
> mode.

Probably best that Tomi queues all the panel .dts changes into
a separate immutable branch that I can merge too.

Tony
 
> Signed-off-by: Darren Etheridge <detheridge@xxxxxx>
> ---
>  arch/arm/boot/dts/am335x-evmsk.dts | 105 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 105 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts
> index ec08f6f..a5e1ab8 100644
> --- a/arch/arm/boot/dts/am335x-evmsk.dts
> +++ b/arch/arm/boot/dts/am335x-evmsk.dts
> @@ -138,12 +138,113 @@
>  			"Headphone Jack",       "HPLOUT",
>  			"Headphone Jack",       "HPROUT";
>  	};
> +
> +	panel {
> +		compatible = "ti,tilcdc,panel";
> +		pinctrl-names = "default", "sleep";
> +		pinctrl-0 = <&lcd_pins_default>;
> +		pinctrl-1 = <&lcd_pins_sleep>;
> +		status = "okay";
> +		panel-info {
> +			ac-bias           = <255>;
> +			ac-bias-intrpt    = <0>;
> +			dma-burst-sz      = <16>;
> +			bpp               = <32>;
> +			fdd               = <0x80>;
> +			sync-edge         = <0>;
> +			sync-ctrl         = <1>;
> +			raster-order      = <0>;
> +			fifo-th           = <0>;
> +		};
> +		display-timings {
> +			480x272 {
> +				hactive         = <480>;
> +				vactive         = <272>;
> +				hback-porch     = <43>;
> +				hfront-porch    = <8>;
> +				hsync-len       = <4>;
> +				vback-porch     = <12>;
> +				vfront-porch    = <4>;
> +				vsync-len       = <10>;
> +				clock-frequency = <9000000>;
> +				hsync-active    = <0>;
> +				vsync-active    = <0>;
> +			};
> +		};
> +	};
>  };
>  
>  &am33xx_pinmux {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&gpio_keys_s0 &clkout2_pin>;
>  
> +	lcd_pins_default: lcd_pins_default {
> +		pinctrl-single,pins = <
> +			0x20 (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad8.lcd_data16 */
> +			0x24 (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad9.lcd_data17 */
> +			0x28 (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad10.lcd_data18 */
> +			0x2c (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad11.lcd_data19 */
> +			0x30 (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad12.lcd_data20 */
> +			0x34 (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad13.lcd_data21 */
> +			0x38 (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad14.lcd_data22 */
> +			0x3c (PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad15.lcd_data23 */
> +			0xa0 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data0.lcd_data0 */
> +			0xa4 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data1.lcd_data1 */
> +			0xa8 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data2.lcd_data2 */
> +			0xac (PIN_OUTPUT | MUX_MODE0)	/* lcd_data3.lcd_data3 */
> +			0xb0 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data4.lcd_data4 */
> +			0xb4 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data5.lcd_data5 */
> +			0xb8 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data6.lcd_data6 */
> +			0xbc (PIN_OUTPUT | MUX_MODE0)	/* lcd_data7.lcd_data7 */
> +			0xc0 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data8.lcd_data8 */
> +			0xc4 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data9.lcd_data9 */
> +			0xc8 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data10.lcd_data10 */
> +			0xcc (PIN_OUTPUT | MUX_MODE0)	/* lcd_data11.lcd_data11 */
> +			0xd0 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data12.lcd_data12 */
> +			0xd4 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data13.lcd_data13 */
> +			0xd8 (PIN_OUTPUT | MUX_MODE0)	/* lcd_data14.lcd_data14 */
> +			0xdc (PIN_OUTPUT | MUX_MODE0)	/* lcd_data15.lcd_data15 */
> +			0xe0 (PIN_OUTPUT | MUX_MODE0)	/* lcd_vsync.lcd_vsync */
> +			0xe4 (PIN_OUTPUT | MUX_MODE0)	/* lcd_hsync.lcd_hsync */
> +			0xe8 (PIN_OUTPUT | MUX_MODE0)	/* lcd_pclk.lcd_pclk */
> +			0xec (PIN_OUTPUT | MUX_MODE0)	/* lcd_ac_bias_en.lcd_ac_bias_en */
> +		>;
> +	};
> +
> +	lcd_pins_sleep: lcd_pins_sleep {
> +		pinctrl-single,pins = <
> +			0x20 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad8.lcd_data16 */
> +			0x24 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad9.lcd_data17 */
> +			0x28 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad10.lcd_data18 */
> +			0x2c (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad11.lcd_data19 */
> +			0x30 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad12.lcd_data20 */
> +			0x34 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad13.lcd_data21 */
> +			0x38 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad14.lcd_data22 */
> +			0x3c (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad15.lcd_data23 */
> +			0xa0 (PULL_DISABLE | MUX_MODE7)		/* lcd_data0.lcd_data0 */
> +			0xa4 (PULL_DISABLE | MUX_MODE7)		/* lcd_data1.lcd_data1 */
> +			0xa8 (PULL_DISABLE | MUX_MODE7)		/* lcd_data2.lcd_data2 */
> +			0xac (PULL_DISABLE | MUX_MODE7)		/* lcd_data3.lcd_data3 */
> +			0xb0 (PULL_DISABLE | MUX_MODE7)		/* lcd_data4.lcd_data4 */
> +			0xb4 (PULL_DISABLE | MUX_MODE7)		/* lcd_data5.lcd_data5 */
> +			0xb8 (PULL_DISABLE | MUX_MODE7)		/* lcd_data6.lcd_data6 */
> +			0xbc (PULL_DISABLE | MUX_MODE7)		/* lcd_data7.lcd_data7 */
> +			0xc0 (PULL_DISABLE | MUX_MODE7)		/* lcd_data8.lcd_data8 */
> +			0xc4 (PULL_DISABLE | MUX_MODE7)		/* lcd_data9.lcd_data9 */
> +			0xc8 (PULL_DISABLE | MUX_MODE7)		/* lcd_data10.lcd_data10 */
> +			0xcc (PULL_DISABLE | MUX_MODE7)		/* lcd_data11.lcd_data11 */
> +			0xd0 (PULL_DISABLE | MUX_MODE7)		/* lcd_data12.lcd_data12 */
> +			0xd4 (PULL_DISABLE | MUX_MODE7)		/* lcd_data13.lcd_data13 */
> +			0xd8 (PULL_DISABLE | MUX_MODE7)		/* lcd_data14.lcd_data14 */
> +			0xdc (PULL_DISABLE | MUX_MODE7)		/* lcd_data15.lcd_data15 */
> +			0xe0 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_vsync.lcd_vsync */
> +			0xe4 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_hsync.lcd_hsync */
> +			0xe8 (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_pclk.lcd_pclk */
> +			0xec (PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_ac_bias_en.lcd_ac_bias_en */
> +		>;
> +	};
> +
> +
>  	user_leds_s0: user_leds_s0 {
>  		pinctrl-single,pins = <
>  			0x10 (PIN_OUTPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad4.gpio1_4 */
> @@ -560,3 +661,7 @@
>  		ti,wire-config = <0x00 0x11 0x22 0x33>;
>  	};
>  };
> +
> +&lcdc {
> +      status = "okay";
> +};
> -- 
> 1.8.4
> 
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