diff options
Diffstat (limited to 'target/linux/gemini/patches-4.14/0016-ARM-dts-Add-TVE-TVC-and-ILI9322-panel-to-DIR-685.patch')
| -rw-r--r-- | target/linux/gemini/patches-4.14/0016-ARM-dts-Add-TVE-TVC-and-ILI9322-panel-to-DIR-685.patch | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-4.14/0016-ARM-dts-Add-TVE-TVC-and-ILI9322-panel-to-DIR-685.patch b/target/linux/gemini/patches-4.14/0016-ARM-dts-Add-TVE-TVC-and-ILI9322-panel-to-DIR-685.patch new file mode 100644 index 0000000000..e0cf267ccc --- /dev/null +++ b/target/linux/gemini/patches-4.14/0016-ARM-dts-Add-TVE-TVC-and-ILI9322-panel-to-DIR-685.patch @@ -0,0 +1,113 @@ +From 9d3b968d13ba1eecaf22d5824cf8fd270c061534 Mon Sep 17 00:00:00 2001 +From: Linus Walleij <linus.walleij@linaro.org> +Date: Sat, 15 Jul 2017 21:02:06 +0200 +Subject: [PATCH 16/31] ARM: dts: Add TVE/TVC and ILI9322 panel to DIR-685 + +This adds the TVE200/TVC TV-encoder and the Ilitek ILI9322 panel +to the DIR-685 device tree. + +This brings graphics to this funky router and it is possible to +even run a console on its tiny screen. + +Incidentally this requires us to disable the access to the +parallel (NOR) flash, as the communication pins to the panel +are shared with the flash memory. + +To access the flash, a separate kernel with the panel disabled +and the flash enabled should be booted. The pin control selecting +whether to use the lines cannot be altered at runtime due to +hardware constraints. + +Cc: David Lechner <david@lechnology.com> +Cc: Stefano Babic <sbabic@denx.de> +Cc: Ben Dooks <ben.dooks@codethink.co.uk> +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +--- + arch/arm/boot/dts/gemini-dlink-dir-685.dts | 63 +++++++++++++++++++++++++++++- + 1 file changed, 62 insertions(+), 1 deletion(-) + +--- a/arch/arm/boot/dts/gemini-dlink-dir-685.dts ++++ b/arch/arm/boot/dts/gemini-dlink-dir-685.dts +@@ -45,6 +45,47 @@ + }; + }; + ++ vdisp: regulator { ++ compatible = "regulator-fixed"; ++ regulator-name = "display-power"; ++ regulator-min-microvolt = <3600000>; ++ regulator-max-microvolt = <3600000>; ++ /* Collides with LCD E */ ++ gpio = <&gpio0 16 GPIO_ACTIVE_HIGH>; ++ enable-active-high; ++ }; ++ ++ spi { ++ compatible = "spi-gpio"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ /* Collides with IDE pins, that's cool (we do not use them) */ ++ gpio-sck = <&gpio1 5 GPIO_ACTIVE_HIGH>; ++ gpio-miso = <&gpio1 8 GPIO_ACTIVE_HIGH>; ++ gpio-mosi = <&gpio1 7 GPIO_ACTIVE_HIGH>; ++ /* Collides with pflash CE1, not so cool */ ++ cs-gpios = <&gpio0 20 GPIO_ACTIVE_HIGH>; ++ num-chipselects = <1>; ++ ++ panel: display@0 { ++ compatible = "dlink,dir-685-panel", "ilitek,ili9322"; ++ reg = <0>; ++ /* 50 ns min period = 20 MHz */ ++ spi-max-frequency = <20000000>; ++ spi-cpol; /* Clock active low */ ++ vcc-supply = <&vdisp>; ++ iovcc-supply = <&vdisp>; ++ vci-supply = <&vdisp>; ++ ++ port { ++ panel_in: endpoint { ++ remote-endpoint = <&display_out>; ++ }; ++ }; ++ }; ++ }; ++ + leds { + compatible = "gpio-leds"; + led-wps { +@@ -115,7 +156,16 @@ + + soc { + flash@30000000 { +- status = "okay"; ++ /* ++ * Flash access is by default disabled, because it ++ * collides with the Chip Enable signal for the display ++ * panel, that reuse the parallel flash Chip Select 1 ++ * (CS1). Enabling flash makes graphics stop working. ++ * ++ * We might be able to hack around this by letting ++ * GPIO poke around in the flash controller registers. ++ */ ++ /* status = "okay"; */ + /* 32MB of flash */ + reg = <0x30000000 0x02000000>; + +@@ -242,5 +292,16 @@ + ata@63000000 { + status = "okay"; + }; ++ ++ display-controller@6a000000 { ++ status = "okay"; ++ ++ port@0 { ++ reg = <0>; ++ display_out: endpoint { ++ remote-endpoint = <&panel_in>; ++ }; ++ }; ++ }; + }; + }; |