[PATCH 0/8] Support for AM33xx PWM Susbsytem
In AM33xx PWM sub modules like ECAP, EHRPWM & EQEP are integrated to PWM subsystem. All these submodules shares the resources (clock) & has a clock gating register in PWM Subsystem. This patch series creates a parent PWM Subsystem driver to handle access synchronization of shared resources & clock gating from PWM Subsystem configuration space. Also Device tree nodes populated to support parent child relation between PWMSS, ECAP & EHRPWM submodules. In addition EHRPWM module requires explicit clock gating from control module & is handled by patch #2 & 6. Patch #4 & 5 submitted is a second revision as suggested by Thierry for handling clock gating with a global function . This requires config space handling done independent from driver and is done at parent driver. So the parent<->child relation adopted to handle 1. pm runtime synchronization 2. PWM subsystem common config space clock gating for PWM submodules. Patches supports - Driver support for parent child relation handled patch #1 - Optional EHRPWM tb clock in patch #2 - Parent child in HWMOD handled at patch #3 - Device tree binding support handled in patch #4-6 - DT node populated in patch #7-8. This patch series based on linux-next/20121102 and tested on AM335x-evm. It depends on [1] 1. https://lkml.org/lkml/2012/10/29/589 pwm: Device tree support for PWM polarity Philip, Avinash (8): PWMSS: Add PWM Subsystem driver for parent<->child relationship ARM: am33xx: clk: Add optional clock for EHRPWM ARM: OMAP: AM33xx hwmod: Add parent-child relationship for PWM subsystem pwm: pwm-tiecap: Add device-tree binding support for APWM driver pwm: pwm-tiehrpwm: Add device-tree binding support for EHRPWM driver pwm: pwm-tiehrpwm: Adding TBCLK gating support. ARM: dts: AM33XX: Add PWMSS device tree nodes ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm .../devicetree/bindings/pwm/pwm-tiecap.txt | 22 + .../devicetree/bindings/pwm/pwm-tiehrpwm.txt | 25 ++ Documentation/devicetree/bindings/pwm/tipwmss.txt | 30 ++ arch/arm/boot/dts/am335x-evm.dts | 21 + arch/arm/boot/dts/am33xx.dtsi | 90 + arch/arm/mach-omap2/clock33xx_data.c | 37 ++ arch/arm/mach-omap2/control.h |8 + arch/arm/mach-omap2/omap_hwmod_33xx_data.c | 414 +--- drivers/pwm/Kconfig| 11 + drivers/pwm/Makefile |1 + drivers/pwm/pwm-tiecap.c | 36 ++- drivers/pwm/pwm-tiehrpwm.c | 53 +++- drivers/pwm/tipwmss.c | 136 +++ drivers/pwm/tipwmss.h |8 + 14 files changed, 754 insertions(+), 138 deletions(-) create mode 100644 Documentation/devicetree/bindings/pwm/pwm-tiecap.txt create mode 100644 Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt create mode 100644 Documentation/devicetree/bindings/pwm/tipwmss.txt create mode 100644 drivers/pwm/tipwmss.c create mode 100644 drivers/pwm/tipwmss.h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 0/8] Support for AM33xx PWM Susbsytem
In AM33xx PWM sub modules like ECAP, EHRPWM EQEP are integrated to PWM subsystem. All these submodules shares the resources (clock) has a clock gating register in PWM Subsystem. This patch series creates a parent PWM Subsystem driver to handle access synchronization of shared resources clock gating from PWM Subsystem configuration space. Also Device tree nodes populated to support parent child relation between PWMSS, ECAP EHRPWM submodules. In addition EHRPWM module requires explicit clock gating from control module is handled by patch #2 6. Patch #4 5 submitted is a second revision as suggested by Thierry for handling clock gating with a global function . This requires config space handling done independent from driver and is done at parent driver. So the parent-child relation adopted to handle 1. pm runtime synchronization 2. PWM subsystem common config space clock gating for PWM submodules. Patches supports - Driver support for parent child relation handled patch #1 - Optional EHRPWM tb clock in patch #2 - Parent child in HWMOD handled at patch #3 - Device tree binding support handled in patch #4-6 - DT node populated in patch #7-8. This patch series based on linux-next/20121102 and tested on AM335x-evm. It depends on [1] 1. https://lkml.org/lkml/2012/10/29/589 pwm: Device tree support for PWM polarity Philip, Avinash (8): PWMSS: Add PWM Subsystem driver for parent-child relationship ARM: am33xx: clk: Add optional clock for EHRPWM ARM: OMAP: AM33xx hwmod: Add parent-child relationship for PWM subsystem pwm: pwm-tiecap: Add device-tree binding support for APWM driver pwm: pwm-tiehrpwm: Add device-tree binding support for EHRPWM driver pwm: pwm-tiehrpwm: Adding TBCLK gating support. ARM: dts: AM33XX: Add PWMSS device tree nodes ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm .../devicetree/bindings/pwm/pwm-tiecap.txt | 22 + .../devicetree/bindings/pwm/pwm-tiehrpwm.txt | 25 ++ Documentation/devicetree/bindings/pwm/tipwmss.txt | 30 ++ arch/arm/boot/dts/am335x-evm.dts | 21 + arch/arm/boot/dts/am33xx.dtsi | 90 + arch/arm/mach-omap2/clock33xx_data.c | 37 ++ arch/arm/mach-omap2/control.h |8 + arch/arm/mach-omap2/omap_hwmod_33xx_data.c | 414 +--- drivers/pwm/Kconfig| 11 + drivers/pwm/Makefile |1 + drivers/pwm/pwm-tiecap.c | 36 ++- drivers/pwm/pwm-tiehrpwm.c | 53 +++- drivers/pwm/tipwmss.c | 136 +++ drivers/pwm/tipwmss.h |8 + 14 files changed, 754 insertions(+), 138 deletions(-) create mode 100644 Documentation/devicetree/bindings/pwm/pwm-tiecap.txt create mode 100644 Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt create mode 100644 Documentation/devicetree/bindings/pwm/tipwmss.txt create mode 100644 drivers/pwm/tipwmss.c create mode 100644 drivers/pwm/tipwmss.h -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
