In cygnus touch screen controller registers are shared with ADC
and flex timer. Using readl/writel could lead to race condition.
In such cases we need to support register access using syscon
framework based API's. So Added dt changes to use syscon.
Signed-off-by: Raveendra Padasalagi <raveendra.padasal...@broadcom.com>
Reviewed-by: Ray Jui <ray....@broadcom.com>
Reviewed-by: Scott Branden <scott.bran...@broadcom.com>
---
arch/arm/boot/dts/bcm-cygnus.dtsi | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi
b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 3878793..9190224 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>;
};
+ ts_adc_syscon: ts_adc_syscon@0x180a6000 {
+ compatible = "syscon";
+ reg = <0x180a6000 0xc30>;
+ };
+
touchscreen: tsc@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
