[PATCH 5/9] dts: versatile: add sysregs nodes
From: Linus Walleij <hidden>
Date: 2015-01-08 19:44:29
Also in:
linux-devicetree
On Tue, Dec 30, 2014 at 8:28 PM, Rob Herring [off-list ref] wrote:
quoted hunk
From: Rob Herring <robh@kernel.org> The Versatile boards have the same sysregs as other ARM Ltd boards. Add the nodes in preparation to enable support for 24MHz counter as sched_clock and MMC card detect and write protect support. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Russell King <redacted> Cc: Linus Walleij <redacted> --- arch/arm/boot/dts/versatile-ab.dts | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)diff --git a/arch/arm/boot/dts/versatile-ab.dts b/arch/arm/boot/dts/versatile-ab.dts index 27d0d9c..62f04b0 100644 --- a/arch/arm/boot/dts/versatile-ab.dts +++ b/arch/arm/boot/dts/versatile-ab.dts@@ -252,6 +252,29 @@ #size-cells = <1>; ranges = <0 0x10000000 0x10000>; + sysreg at 0 { + compatible = "arm,vexpress-sysreg";
vexpress? No... compatible = "syscon";
+ reg = <0x00000 0x1000>;
+
+ v2m_led_gpios: sys_led at 08 {
+ compatible = "arm,vexpress-sysreg,sys_led";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };These are not GPIOs. These are LED registers really. see how to use LEDs from drivers/leds/leds-syscon.c and bindings. example in: arch/arm/boot/dts/integrator.dtsi Very straight-forward I think.
+
+ v2m_mmc_gpios: sys_mci at 48 {
+ compatible = "arm,vexpress-sysreg,sys_mci";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ v2m_flash_gpios: sys_flash at 4c {
+ compatible = "arm,vexpress-sysreg,sys_flash";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };I don't have drivers for these "gpio controllers" and I don't think they are GPIOs either, since they are not general purpose at all. For the latter I have some code boiling for the Integrators: https://git.kernel.org/cgit/linux/kernel/git/linusw/linux-integrator.git/commit/?h=multiplatform&id=9c28e114ec957fadf1dade382d8e8b8aa43c8426 https://git.kernel.org/cgit/linux/kernel/git/linusw/linux-integrator.git/commit/?h=multiplatform&id=a3d4512abb85de290cdca0586bcff9147833917f Yours, Linus Walleij