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* [PATCH 0/3] Enable eQEP counter driver on BeagleBone Blue
@ 2020-10-12 21:12 David Lechner
  2020-10-12 21:12 ` [PATCH 1/3] ARM: dts: am33xx: Add nodes for eQEP David Lechner
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: David Lechner @ 2020-10-12 21:12 UTC (permalink / raw)
  To: linux-omap
  Cc: David Lechner, Benoît Cousson, Tony Lindgren, Robert Nelson,
	Drew Fustini, Rob Herring, devicetree, linux-kernel,
	linux-arm-kernel

This series adds device tree nodes for the eQEP portion of the PWMSS on AM33xx
and enables it on BeagleBone Blue.

I actually submitted these a year ago, but it looks like these patches never got
applied with the actual eQEP driver when it was merged.

For reference, there was some previous discussion about the clocks in "ARM: dts:
am33xx: Add nodes for eQEP". [1]

[1]: https://lore.kernel.org/linux-omap/20190723145100.GS5447@atomide.com/

I have also included a new patch to enable the eQEP driver in the defconfig.


David Lechner (3):
  ARM: dts: am33xx: Add nodes for eQEP
  ARM: dts: am335x-boneblue: Enable eQEP
  ARM: omap2plus_defconfig: Enable TI eQEP counter driver

 arch/arm/boot/dts/am335x-boneblue.dts | 54 +++++++++++++++++++++++++++
 arch/arm/boot/dts/am33xx-l4.dtsi      | 27 ++++++++++++++
 arch/arm/configs/omap2plus_defconfig  |  2 +
 3 files changed, 83 insertions(+)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH 1/3] ARM: dts: am33xx: Add nodes for eQEP
  2020-10-12 21:12 [PATCH 0/3] Enable eQEP counter driver on BeagleBone Blue David Lechner
@ 2020-10-12 21:12 ` David Lechner
  2020-10-12 21:12 ` [PATCH 2/3] ARM: dts: am335x-boneblue: Enable eQEP David Lechner
  2020-10-12 21:12 ` [PATCH 3/3] ARM: omap2plus_defconfig: Enable TI eQEP counter driver David Lechner
  2 siblings, 0 replies; 4+ messages in thread
From: David Lechner @ 2020-10-12 21:12 UTC (permalink / raw)
  To: linux-omap
  Cc: David Lechner, Benoît Cousson, Tony Lindgren, Robert Nelson,
	Drew Fustini, Rob Herring, devicetree, linux-kernel,
	linux-arm-kernel

This adds new nodes for the Texas Instruments Enhanced Quadrature
Encoder Pulse (eQEP) module in the PWM subsystem on AM33XX.

Signed-off-by: David Lechner <david@lechnology.com>
---
 arch/arm/boot/dts/am33xx-l4.dtsi | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm/boot/dts/am33xx-l4.dtsi b/arch/arm/boot/dts/am33xx-l4.dtsi
index b88d0caa4b2d..17910268df82 100644
--- a/arch/arm/boot/dts/am33xx-l4.dtsi
+++ b/arch/arm/boot/dts/am33xx-l4.dtsi
@@ -1924,6 +1924,15 @@ ecap0: ecap@100 {
 					status = "disabled";
 				};
 
+				eqep0: counter@180 {
+					compatible = "ti,am3352-eqep";
+					reg = <0x180 0x80>;
+					clocks = <&l4ls_gclk>;
+					clock-names = "sysclkout";
+					interrupts = <79>;
+					status = "disabled";
+				};
+
 				ehrpwm0: pwm@200 {
 					compatible = "ti,am3352-ehrpwm",
 						     "ti,am33xx-ehrpwm";
@@ -1976,6 +1985,15 @@ ecap1: ecap@100 {
 					status = "disabled";
 				};
 
+				eqep1: counter@180 {
+					compatible = "ti,am3352-eqep";
+					reg = <0x180 0x80>;
+					clocks = <&l4ls_gclk>;
+					clock-names = "sysclkout";
+					interrupts = <88>;
+					status = "disabled";
+				};
+
 				ehrpwm1: pwm@200 {
 					compatible = "ti,am3352-ehrpwm",
 						     "ti,am33xx-ehrpwm";
@@ -2028,6 +2046,15 @@ ecap2: ecap@100 {
 					status = "disabled";
 				};
 
+				eqep2: counter@180 {
+					compatible = "ti,am3352-eqep";
+					reg = <0x180 0x80>;
+					clocks = <&l4ls_gclk>;
+					clock-names = "sysclkout";
+					interrupts = <89>;
+					status = "disabled";
+				};
+
 				ehrpwm2: pwm@200 {
 					compatible = "ti,am3352-ehrpwm",
 						     "ti,am33xx-ehrpwm";
-- 
2.25.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH 2/3] ARM: dts: am335x-boneblue: Enable eQEP
  2020-10-12 21:12 [PATCH 0/3] Enable eQEP counter driver on BeagleBone Blue David Lechner
  2020-10-12 21:12 ` [PATCH 1/3] ARM: dts: am33xx: Add nodes for eQEP David Lechner
@ 2020-10-12 21:12 ` David Lechner
  2020-10-12 21:12 ` [PATCH 3/3] ARM: omap2plus_defconfig: Enable TI eQEP counter driver David Lechner
  2 siblings, 0 replies; 4+ messages in thread
From: David Lechner @ 2020-10-12 21:12 UTC (permalink / raw)
  To: linux-omap
  Cc: David Lechner, Benoît Cousson, Tony Lindgren, Robert Nelson,
	Drew Fustini, Rob Herring, devicetree, linux-kernel,
	linux-arm-kernel

This enables the Enhanced Quadrature Encoder Pulse (eQEP) module for
connectors E1, E2 and E3 on BeagleBone Blue.

Signed-off-by: David Lechner <david@lechnology.com>
---
 arch/arm/boot/dts/am335x-boneblue.dts | 54 +++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/arch/arm/boot/dts/am335x-boneblue.dts b/arch/arm/boot/dts/am335x-boneblue.dts
index c696d57cf364..69acaf4ea0f3 100644
--- a/arch/arm/boot/dts/am335x-boneblue.dts
+++ b/arch/arm/boot/dts/am335x-boneblue.dts
@@ -241,6 +241,30 @@ AM33XX_PADCONF(AM335X_PIN_UART0_CTSN, PIN_OUTPUT, MUX_MODE2)		/* (E18) uart0_cts
 			AM33XX_PADCONF(AM335X_PIN_MII1_RXD0, PIN_OUTPUT, MUX_MODE7)		/* (M16) gmii1_rxd0.gpio2[21] */
 		>;
 	};
+
+	/* E1 */
+	eqep0_pins: pinmux_eqep0_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_AXR0, PIN_INPUT, MUX_MODE1)		/* (B12) mcasp0_aclkr.eQEP0A_in */
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_FSR, PIN_INPUT, MUX_MODE1)		/* (C13) mcasp0_fsr.eQEP0B_in */
+		>;
+	};
+
+	/* E2 */
+	eqep1_pins: pinmux_eqep1_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA12, PIN_INPUT, MUX_MODE2)		/* (V2) lcd_data12.eQEP1A_in */
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA13, PIN_INPUT, MUX_MODE2)		/* (V3) lcd_data13.eQEP1B_in */
+		>;
+	};
+
+	/* E3 */
+	eqep2_pins: pinmux_eqep2_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_GPMC_AD12, PIN_INPUT, MUX_MODE4)		/* (T12) gpmc_ad12.eQEP2A_in */
+			AM33XX_PADCONF(AM335X_PIN_GPMC_AD13, PIN_INPUT, MUX_MODE4)		/* (R12) gpmc_ad13.eQEP2B_in */
+		>;
+	};
 };
 
 &uart0 {
@@ -419,3 +443,33 @@ ls_buf_en {
 		line-name = "LS_BUF_EN";
 	};
 };
+
+&epwmss0 {
+	status = "okay";
+};
+
+&eqep0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&eqep0_pins>;
+	status = "okay";
+};
+
+&epwmss1 {
+	status = "okay";
+};
+
+&eqep1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&eqep1_pins>;
+	status = "okay";
+};
+
+&epwmss2 {
+	status = "okay";
+};
+
+&eqep2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&eqep2_pins>;
+	status = "okay";
+};
-- 
2.25.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH 3/3] ARM: omap2plus_defconfig: Enable TI eQEP counter driver
  2020-10-12 21:12 [PATCH 0/3] Enable eQEP counter driver on BeagleBone Blue David Lechner
  2020-10-12 21:12 ` [PATCH 1/3] ARM: dts: am33xx: Add nodes for eQEP David Lechner
  2020-10-12 21:12 ` [PATCH 2/3] ARM: dts: am335x-boneblue: Enable eQEP David Lechner
@ 2020-10-12 21:12 ` David Lechner
  2 siblings, 0 replies; 4+ messages in thread
From: David Lechner @ 2020-10-12 21:12 UTC (permalink / raw)
  To: linux-omap
  Cc: David Lechner, Benoît Cousson, Tony Lindgren, Robert Nelson,
	Drew Fustini, Rob Herring, devicetree, linux-kernel,
	linux-arm-kernel

This enables the TI eQEP counter driver that is used by BeagleBone Blue.

Signed-off-by: David Lechner <david@lechnology.com>
---
 arch/arm/configs/omap2plus_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index fe383f5a92fb..71b1a8f4c241 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -524,6 +524,8 @@ CONFIG_PHY_DM816X_USB=m
 CONFIG_OMAP_USB2=m
 CONFIG_TI_PIPE3=y
 CONFIG_TWL4030_USB=m
+CONFIG_COUNTER=m
+CONFIG_TI_EQEP=m
 CONFIG_EXT2_FS=y
 CONFIG_EXT3_FS=y
 CONFIG_EXT4_FS_SECURITY=y
-- 
2.25.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

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Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-12 21:12 [PATCH 0/3] Enable eQEP counter driver on BeagleBone Blue David Lechner
2020-10-12 21:12 ` [PATCH 1/3] ARM: dts: am33xx: Add nodes for eQEP David Lechner
2020-10-12 21:12 ` [PATCH 2/3] ARM: dts: am335x-boneblue: Enable eQEP David Lechner
2020-10-12 21:12 ` [PATCH 3/3] ARM: omap2plus_defconfig: Enable TI eQEP counter driver David Lechner

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