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 <raveendra.padasalagi@xxxxxxxxxxxx>
> Reviewed-by: Ray Jui <ray.jui@xxxxxxxxxxxx>
> Reviewed-by: Scott Branden <scott.branden@xxxxxxxxxxxx>
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!
> ---
> 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@180a6000 {
> + ts_adc_syscon: ts_adc_syscon@180a6000 {
> + compatible = "brcm,iproc-ts-adc-syscon", "syscon";
> + reg = <0x180a6000 0xc30>;
> + };
> +
> + touchscreen: touchscreen@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
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