[PATCH v2 resend 0/4] ARM: dts: sunxi: q8 A13 tablet backlight support

[PATCH v2 resend 0/4] ARM: dts: sunxi: q8 A13 tablet backlight support

[Hans de Goede]

Hi Maxime,

This series seems to have fallen through the cracks, hence this resend.

Regards,

Hans

[PATCH v2 resend 1/4] ARM: dts: sun5i: Add PWM controller node for A13/A10s

[Hans de Goede]

The sun5i die has a PWM controller that is compatible to the one on the A20.
Add a device node for it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 arch/arm/boot/dts/sun5i.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
index 78b993a..5e036a4 100644
--- a/arch/arm/boot/dts/sun5i.dtsi
+++ b/arch/arm/boot/dts/sun5i.dtsi
@@ -543,6 +543,14 @@
 			reg = <0x01c20c90 0x10>;
 		};
 
+		pwm: pwm at 01c20e00 {
+			compatible = "allwinner,sun7i-a20-pwm";
+			reg = <0x01c20e00 0xc>;
+			clocks = <&osc24M>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		lradc: lradc at 01c22800 {
 			compatible = "allwinner,sun4i-a10-lradc-keys";
 			reg = <0x01c22800 0x100>;
-- 
2.5.0

[PATCH v2 resend 2/4] ARM: dts: sun5i: Add PWM channel 0 pinmux setting for A13/A10s

[Hans de Goede]

Add a pinmux setting for the first pwm channel. This is often used for
backlight dimming on tablets.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 arch/arm/boot/dts/sun5i.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
index 5e036a4..f0714d3 100644
--- a/arch/arm/boot/dts/sun5i.dtsi
+++ b/arch/arm/boot/dts/sun5i.dtsi
@@ -529,6 +529,13 @@
 				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
 				allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
 			};
+
+			pwm0_pins: pwm0 {
+				allwinner,pins = "PB2";
+				allwinner,function = "pwm";
+				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+			};
 		};
 
 		timer at 01c20c00 {
-- 
2.5.0

[PATCH v2 resend 3/4] ARM: dts: sunxi: Enable PWM controller on Q8 format tablets

[Hans de Goede]

From: Chen-Yu Tsai <wens@csie.org>

Q8 format tablets use channel 0 of the PWM controller for backlight dimming.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v2:
-Enable the pwm controller in sunxi-q8-common.dtsi rather then in
 sun8i-q8-common.dtsi
---
 arch/arm/boot/dts/sunxi-q8-common.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/sunxi-q8-common.dtsi b/arch/arm/boot/dts/sunxi-q8-common.dtsi
index 17b26ff..b824146 100644
--- a/arch/arm/boot/dts/sunxi-q8-common.dtsi
+++ b/arch/arm/boot/dts/sunxi-q8-common.dtsi
@@ -75,3 +75,9 @@
 		voltage = <400000>;
 	};
 };
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_pins>;
+	status = "okay";
+};
-- 
2.5.0

[PATCH v2 resend 4/4] ARM: dts: sun5i: Add backlight node to sun5i-q8-common.dtsi

[Hans de Goede]

All A13 based q8 formfactor tablets use the same backlight setup, add
a backlight devicetree node for controlling the backlight on these devices.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v2:
-Drop the comment about DCDC1SW, the axp209 used on A13 boards does not
 have a DCDC1SW
---
 arch/arm/boot/dts/sun5i-q8-common.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/sun5i-q8-common.dtsi b/arch/arm/boot/dts/sun5i-q8-common.dtsi
index 0641d68..a78e189 100644
--- a/arch/arm/boot/dts/sun5i-q8-common.dtsi
+++ b/arch/arm/boot/dts/sun5i-q8-common.dtsi
@@ -41,11 +41,21 @@
  */
 #include "sunxi-q8-common.dtsi"
 
+#include <dt-bindings/pwm/pwm.h>
+
 / {
 	aliases {
 		serial0 = &uart1;
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
+		default-brightness-level = <8>;
+		/* TODO: backlight uses axp gpio1 as enable pin */
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
-- 
2.5.0

[PATCH v2 resend 0/4] ARM: dts: sunxi: q8 A13 tablet backlight support

[Maxime Ripard]

Hi,

On Tue, Sep 29, 2015 at 12:29:47PM +0200, Hans de Goede wrote:
> Hi Maxime,
> 
> This series seems to have fallen through the cracks, hence this
> resend.

No, it didn't fall through the cracks, I asked a question on the first
patch and never got a reply.

The way we handled *all* the controllers so far is that the compatible
was representing what the controllers what features the controller was
exposing. This is the case for the clocks or pinctrl for example.

We should be consistent with that (beside the fact that using a
compatible from a later SoC is wrong).

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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[linux-sunxi] Re: [PATCH v2 resend 0/4] ARM: dts: sunxi: q8 A13 tablet backlight support

[Hans de Goede]

Hi,

On 01-10-15 22:33, Maxime Ripard wrote:
> Hi,
>
> On Tue, Sep 29, 2015 at 12:29:47PM +0200, Hans de Goede wrote:
>> Hi Maxime,
>>
>> This series seems to have fallen through the cracks, hence this
>> resend.
>
> No, it didn't fall through the cracks, I asked a question on the first
> patch and never got a reply.
>
> The way we handled *all* the controllers so far is that the compatible
> was representing what the controllers what features the controller was
> exposing. This is the case for the clocks or pinctrl for example.
>
> We should be consistent with that (beside the fact that using a
> compatible from a later SoC is wrong).

Ah ok, I somehow missed that reply, a pwm patch to add the compatibles
+ v3 of the dts patches is coming up.

Regards,

Hans