[PATCH v4 3/3] ARM: dts: use syscon in cygnus touchscreen dt node
From: dmitry.torokhov@gmail.com (Dmitry Torokhov)
Date: 2016-04-06 17:31:48
Also in:
linux-devicetree, linux-input, lkml
On Sat, Feb 27, 2016 at 12:29:56PM +0530, Raveendra Padasalagi wrote:
In Cygnus SOC touch screen controller registers are shared with ADC and flex timer. Using readl/writel could lead to race condition. So touchscreen driver is enhanced to support syscon based register access to take care of mutually exclusive access. This patch enables syscon support in touchscreen driver by adding necessary properties in touchscreen dt node and in addition to this renamed existing "tsc" touchscreen node name to "touchscreen". Signed-off-by: Raveendra Padasalagi <redacted> Reviewed-by: Ray Jui <redacted> Reviewed-by: Scott Branden <scott.branden@broadcom.com>
OK, since the new dts is really needed for the driver I'll be folding this into the touchscreen driver patch unless I hear someone yelling at me. Thanks!
quoted hunk ↗ jump to hunk
--- arch/arm/boot/dts/bcm-cygnus.dtsi | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi index 3878793..b42fe55 100644 --- a/arch/arm/boot/dts/bcm-cygnus.dtsi +++ b/arch/arm/boot/dts/bcm-cygnus.dtsi@@ -351,9 +351,16 @@ <&pinctrl 142 10 1>; }; - touchscreen: tsc at 180a6000 { + ts_adc_syscon: ts_adc_syscon at 180a6000 { + compatible = "brcm,iproc-ts-adc-syscon", "syscon"; + reg = <0x180a6000 0xc30>; + }; + + touchscreen: touchscreen at 180a6000 { compatible = "brcm,iproc-touchscreen"; - reg = <0x180a6000 0x40>; + #address-cells = <1>; + #size-cells = <1>; + ts_syscon = <&ts_adc_syscon>; clocks = <&asiu_clks BCM_CYGNUS_ASIU_ADC_CLK>; clock-names = "tsc_clk"; interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;-- 1.9.1
-- Dmitry