[PATCH v3 0/3] ARM: am335x/am437x: Correct PWM bindings

[PATCH v3 0/3] ARM: am335x/am437x: Correct PWM bindings

[Franklin S Cooper Jr]

Unlike the majority of other SOCs the PWM node uses ehrpwm instead of
the generic pwm node name. This patch series switches to the pwm node
name and while at it fix some other minor binding documentation issues.

This patch series also includes a patch to insure ABI compatibility.

This series was tested on AM335x and AM437x GP evm. I also validated that
ABI compatibility was maintained.

V3 changes:
Update am335x-shc.dts

V2 changes:
Dropped patches related to the ranges property.

Franklin S Cooper Jr (3):
  clk: ti: am335x/am4372: Add tbclk to pwm node
  ARM: DTS: da850/am4372/am33xx: Use generic node name for ehrpwm
  pwm: pwm-tiehrpwm: Update dt binding document to use generic node name

 Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt |  4 ++--
 arch/arm/boot/dts/am335x-shc.dts                       |  2 +-
 arch/arm/boot/dts/am33xx.dtsi                          |  6 +++---
 arch/arm/boot/dts/am4372.dtsi                          | 12 ++++++------
 arch/arm/boot/dts/da850.dtsi                           |  4 ++--
 drivers/clk/ti/clk-33xx.c                              |  3 +++
 drivers/clk/ti/clk-43xx.c                              |  6 ++++++
 7 files changed, 23 insertions(+), 14 deletions(-)

-- 
2.7.0

[PATCH v3 1/3] clk: ti: am335x/am4372: Add tbclk to pwm node

[Franklin S Cooper Jr]

Add tblck to the pwm nodes. This insures that the ehrpwm driver has access
to the time-based clk.

Do not remove similar entries for ehrpwm node. Later patches will switch
from using ehrpwm node name to pwm. But to maintain ABI compatibility we
shouldn't remove the old entries.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
---
 drivers/clk/ti/clk-33xx.c | 3 +++
 drivers/clk/ti/clk-43xx.c | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/clk/ti/clk-33xx.c b/drivers/clk/ti/clk-33xx.c
index ef2ec64..0e47d95 100644
--- a/drivers/clk/ti/clk-33xx.c
+++ b/drivers/clk/ti/clk-33xx.c
@@ -108,6 +108,9 @@ static struct ti_dt_clk am33xx_clks[] = {
 	DT_CLK("48300200.ehrpwm", "tbclk", "ehrpwm0_tbclk"),
 	DT_CLK("48302200.ehrpwm", "tbclk", "ehrpwm1_tbclk"),
 	DT_CLK("48304200.ehrpwm", "tbclk", "ehrpwm2_tbclk"),
+	DT_CLK("48300200.pwm", "tbclk", "ehrpwm0_tbclk"),
+	DT_CLK("48302200.pwm", "tbclk", "ehrpwm1_tbclk"),
+	DT_CLK("48304200.pwm", "tbclk", "ehrpwm2_tbclk"),
 	{ .node_name = NULL },
 };
 
diff --git a/drivers/clk/ti/clk-43xx.c b/drivers/clk/ti/clk-43xx.c
index 097fc90..7255aa8 100644
--- a/drivers/clk/ti/clk-43xx.c
+++ b/drivers/clk/ti/clk-43xx.c
@@ -115,6 +115,12 @@ static struct ti_dt_clk am43xx_clks[] = {
 	DT_CLK("48306200.ehrpwm", "tbclk", "ehrpwm3_tbclk"),
 	DT_CLK("48308200.ehrpwm", "tbclk", "ehrpwm4_tbclk"),
 	DT_CLK("4830a200.ehrpwm", "tbclk", "ehrpwm5_tbclk"),
+	DT_CLK("48300200.pwm", "tbclk", "ehrpwm0_tbclk"),
+	DT_CLK("48302200.pwm", "tbclk", "ehrpwm1_tbclk"),
+	DT_CLK("48304200.pwm", "tbclk", "ehrpwm2_tbclk"),
+	DT_CLK("48306200.pwm", "tbclk", "ehrpwm3_tbclk"),
+	DT_CLK("48308200.pwm", "tbclk", "ehrpwm4_tbclk"),
+	DT_CLK("4830a200.pwm", "tbclk", "ehrpwm5_tbclk"),
 	{ .node_name = NULL },
 };
 
-- 
2.7.0

Re: [PATCH v3 1/3] clk: ti: am335x/am4372: Add tbclk to pwm node

[Stephen Boyd]

On 03/17, Franklin S Cooper Jr wrote:
> Add tblck to the pwm nodes. This insures that the ehrpwm driver has access
> to the time-based clk.
> 
> Do not remove similar entries for ehrpwm node. Later patches will switch
> from using ehrpwm node name to pwm. But to maintain ABI compatibility we
> shouldn't remove the old entries.
> 
> Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
> ---

Acked-by: Stephen Boyd <sboyd@codeaurora.org>

Are there any plans to get off these DT_CLK entries entirely?

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH v3 1/3] clk: ti: am335x/am4372: Add tbclk to pwm node

[Tero Kristo]

On 03/21/2016 08:43 PM, Stephen Boyd wrote:
> On 03/17, Franklin S Cooper Jr wrote:
>> Add tblck to the pwm nodes. This insures that the ehrpwm driver has access
>> to the time-based clk.
>>
>> Do not remove similar entries for ehrpwm node. Later patches will switch
>> from using ehrpwm node name to pwm. But to maintain ABI compatibility we
>> shouldn't remove the old entries.
>>
>> Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
>> ---
>
> Acked-by: Stephen Boyd <sboyd@codeaurora.org>
>
> Are there any plans to get off these DT_CLK entries entirely?

The series that adds support for the hwmod clock type for OMAPs has a 
support patch that should address this problem at least partially; I am 
planning to post next rev of that set soonish. It should allow getting 
rid of majority of the clock aliases, I will remove any aliases I can at 
the same time.

-Tero

[PATCH v3 2/3] ARM: DTS: da850/am4372/am33xx: Use generic node name for ehrpwm

[Franklin S Cooper Jr]

When possible generic node names should be used. So change the node name
from ehrpwm to pwm.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
---
Version 3 changes:
Also update am335x-shc.dts

 arch/arm/boot/dts/am335x-shc.dts |  2 +-
 arch/arm/boot/dts/am33xx.dtsi    |  6 +++---
 arch/arm/boot/dts/am4372.dtsi    | 12 ++++++------
 arch/arm/boot/dts/da850.dtsi     |  4 ++--
 4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/arm/boot/dts/am335x-shc.dts b/arch/arm/boot/dts/am335x-shc.dts
index 1b5b044..a10f8be 100644
--- a/arch/arm/boot/dts/am335x-shc.dts
+++ b/arch/arm/boot/dts/am335x-shc.dts
@@ -138,7 +138,7 @@
 &epwmss1 {
 	status = "okay";
 
-	ehrpwm1: ehrpwm@48302200 {
+	ehrpwm1: pwm@48302200 {
 		pinctrl-names = "default";
 		pinctrl-0 = <&ehrpwm1_pins>;
 		status = "okay";
diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 1fafaad..4016254 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -688,7 +688,7 @@
 				status = "disabled";
 			};
 
-			ehrpwm0: ehrpwm@48300200 {
+			ehrpwm0: pwm@48300200 {
 				compatible = "ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48300200 0x80>;
@@ -718,7 +718,7 @@
 				status = "disabled";
 			};
 
-			ehrpwm1: ehrpwm@48302200 {
+			ehrpwm1: pwm@48302200 {
 				compatible = "ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48302200 0x80>;
@@ -748,7 +748,7 @@
 				status = "disabled";
 			};
 
-			ehrpwm2: ehrpwm@48304200 {
+			ehrpwm2: pwm@48304200 {
 				compatible = "ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48304200 0x80>;
diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index 92068fb..33f417c 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -679,7 +679,7 @@
 				status = "disabled";
 			};
 
-			ehrpwm0: ehrpwm@48300200 {
+			ehrpwm0: pwm@48300200 {
 				compatible = "ti,am4372-ehrpwm","ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48300200 0x80>;
@@ -705,7 +705,7 @@
 				status = "disabled";
 			};
 
-			ehrpwm1: ehrpwm@48302200 {
+			ehrpwm1: pwm@48302200 {
 				compatible = "ti,am4372-ehrpwm","ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48302200 0x80>;
@@ -731,7 +731,7 @@
 				status = "disabled";
 			};
 
-			ehrpwm2: ehrpwm@48304200 {
+			ehrpwm2: pwm@48304200 {
 				compatible = "ti,am4372-ehrpwm","ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48304200 0x80>;
@@ -749,7 +749,7 @@
 			ti,hwmods = "epwmss3";
 			status = "disabled";
 
-			ehrpwm3: ehrpwm@48306200 {
+			ehrpwm3: pwm@48306200 {
 				compatible = "ti,am4372-ehrpwm","ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48306200 0x80>;
@@ -767,7 +767,7 @@
 			ti,hwmods = "epwmss4";
 			status = "disabled";
 
-			ehrpwm4: ehrpwm@48308200 {
+			ehrpwm4: pwm@48308200 {
 				compatible = "ti,am4372-ehrpwm","ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x48308200 0x80>;
@@ -785,7 +785,7 @@
 			ti,hwmods = "epwmss5";
 			status = "disabled";
 
-			ehrpwm5: ehrpwm@4830a200 {
+			ehrpwm5: pwm@4830a200 {
 				compatible = "ti,am4372-ehrpwm","ti,am33xx-ehrpwm";
 				#pwm-cells = <3>;
 				reg = <0x4830a200 0x80>;
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 226cda7..c3910e2 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -247,13 +247,13 @@
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
-		ehrpwm0: ehrpwm@01f00000 {
+		ehrpwm0: pwm@01f00000 {
 			compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
 			#pwm-cells = <3>;
 			reg = <0x300000 0x2000>;
 			status = "disabled";
 		};
-		ehrpwm1: ehrpwm@01f02000 {
+		ehrpwm1: pwm@01f02000 {
 			compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
 			#pwm-cells = <3>;
 			reg = <0x302000 0x2000>;
-- 
2.7.0

Re: [PATCH v3 2/3] ARM: DTS: da850/am4372/am33xx: Use generic node name for ehrpwm

[Tony Lindgren]

* Franklin S Cooper Jr <fcooper@ti.com> [160317 18:16]:
> When possible generic node names should be used. So change the node name
> from ehrpwm to pwm.

Picking this patch into omap-for-v4.7/dt thanks.

Tony

[PATCH v3 3/3] pwm: pwm-tiehrpwm: Update dt binding document to use generic node name

[Franklin S Cooper Jr]

Now that the node name has been changed from ehrpwm to pwm the document
should show this proper usage. Also change the unit address in the example
from 0 to the proper physical address value that should be used.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
---
Version 3 changes:
N/A

Version 2 changes:
Changed the unit address for da850 to match the value in the reg property.

 Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt b/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
index 9c100b2..0f9ba50 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
@@ -15,14 +15,14 @@ Optional properties:
 
 Example:
 
-ehrpwm0: ehrpwm@0 { /* EHRPWM on am33xx */
+ehrpwm0: pwm@48300200 { /* EHRPWM on am33xx */
 	compatible = "ti,am33xx-ehrpwm";
 	#pwm-cells = <3>;
 	reg = <0x48300200 0x100>;
 	ti,hwmods = "ehrpwm0";
 };
 
-ehrpwm0: ehrpwm@0 { /* EHRPWM on da850 */
+ehrpwm0: pwm@300000 { /* EHRPWM on da850 */
 	compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
 	#pwm-cells = <3>;
 	reg = <0x300000 0x2000>;
-- 
2.7.0

Re: [PATCH v3 3/3] pwm: pwm-tiehrpwm: Update dt binding document to use generic node name

[Rob Herring]

On Thu, Mar 17, 2016 at 08:15:23PM -0500, Franklin S Cooper Jr wrote:
> Now that the node name has been changed from ehrpwm to pwm the document
> should show this proper usage. Also change the unit address in the example
> from 0 to the proper physical address value that should be used.
> 
> Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
> ---
> Version 3 changes:
> N/A
> 
> Version 2 changes:
> Changed the unit address for da850 to match the value in the reg property.
> 
>  Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v3 3/3] pwm: pwm-tiehrpwm: Update dt binding document to use generic node name

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 647 bytes --]

On Thu, Mar 17, 2016 at 08:15:23PM -0500, Franklin S Cooper Jr wrote:
> Now that the node name has been changed from ehrpwm to pwm the document
> should show this proper usage. Also change the unit address in the example
> from 0 to the proper physical address value that should be used.
> 
> Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
> ---
> Version 3 changes:
> N/A
> 
> Version 2 changes:
> Changed the unit address for da850 to match the value in the reg property.
> 
>  Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks.

Thierry

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