Commit 5b9c8972 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'pwm/for-3.18-rc1' of... 

Merge tag 'pwm/for-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm changes from Thierry Reding:
 "There are no new drivers here, only a couple of fixes all over the
  place"

* tag 'pwm/for-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
  pwm: Let PWM_CLPS711X depend on HAS_IOMEM
  pwm: atmel: Fix calculation of prescale value
  pwm: Fix uninitialized warnings in pwm_get()
  pwm: rockchip: Allow polarity invert on rk3288
  pwm: imx: Avoid sample FIFO overflow for i.MX PWM version2
  pwm: imx: Cleanup indentation for register definitions
  pwm: imx: Fix the macro MX3_PWMCR_PRESCALER(x) definition
  pwm: Fix possible ZERO_SIZE_PTR pointer dereferencing error.
  pwm: lpss: make it buildable only on X86
  pwm: lpss: use c99 initializers in structures
  pwm: lpss: Fix build failure on PowerPC
  pwm: lpss: pci: Move to use pcim_enable_device()
  pwm: lpss: Properly split driver to parts
  pwm: lpss: Add ACPI and PCI IDs for Intel Braswell
  pwm: fsl-ftm: Select REGMAP_MMIO
  pwm: fsl-ftm: Document 'big-endian' property
  pwm: fsl-ftm: Convert to direct regmap API usage
  pwm: fsl-ftm: Clean up the code
parents 3d430bdb dec02f98

Documentation/devicetree/bindings/pwm/pwm-fsl-ftm.txt

+18 −1
Original line number Diff line number Diff line 
Freescale FlexTimer Module (FTM) PWM controller



The same FTM PWM device can have a different endianness on different SoCs. The

device tree provides a property to describing this so that an operating system

device driver can handle all variants of the device. Refer to the table below

for the endianness of the FTM PWM block as integrated into the existing SoCs:



	SoC     | FTM-PWM endianness

	--------+-------------------

	Vybrid  | LE

	LS1     | BE

	LS2     | LE



Please see ../regmap/regmap.txt for more detail about how to specify endian

modes in device tree.





Required properties:

- compatible: Should be "fsl,vf610-ftm-pwm".

- reg: Physical base address and length of the controller's registers
@@ -16,7 +31,8 @@ Required properties: 
- pinctrl-names: Must contain a "default" entry.

- pinctrl-NNN: One property must exist for each entry in pinctrl-names.

  See pinctrl/pinctrl-bindings.txt for details of the property values.



- big-endian: Boolean property, required if the FTM PWM registers use a big-

  endian rather than little-endian layout.



Example:
@@ -32,4 +48,5 @@ pwm0: pwm@40038000 { 
			<&clks VF610_CLK_FTM0_EXT_FIX_EN>;

		pinctrl-names = "default";

		pinctrl-0 = <&pinctrl_pwm0_1>;

		big-endian;

};

Documentation/devicetree/bindings/pwm/pwm-rockchip.txt

+2 −2
Original line number Diff line number Diff line
@@ -7,8 +7,8 @@ Required properties: 
   "rockchip,vop-pwm": found integrated in VOP on RK3288 SoC

 - reg: physical base address and length of the controller's registers

 - clocks: phandle and clock specifier of the PWM reference clock

 - #pwm-cells: should be 2. See pwm.txt in this directory for a

   description of the cell format.

 - #pwm-cells: must be 2 (rk2928) or 3 (rk3288). See pwm.txt in this directory

   for a description of the cell format.



Example:

drivers/pwm/Kconfig

+21 −1
Original line number Diff line number Diff line
@@ -83,6 +83,7 @@ config PWM_BFIN 
config PWM_CLPS711X

	tristate "CLPS711X PWM support"

	depends on ARCH_CLPS711X || COMPILE_TEST

	depends on HAS_IOMEM

	help

	  Generic PWM framework driver for Cirrus Logic CLPS711X.
@@ -101,6 +102,7 @@ config PWM_EP93XX 
config PWM_FSL_FTM

	tristate "Freescale FlexTimer Module (FTM) PWM support"

	depends on OF

	select REGMAP_MMIO

	help

	  Generic FTM PWM framework driver for Freescale VF610 and

	  Layerscape LS-1 SoCs.
@@ -149,7 +151,7 @@ config PWM_LPC32XX 


config PWM_LPSS

	tristate "Intel LPSS PWM support"

	depends on ACPI

	depends on X86

	help

	  Generic PWM framework driver for Intel Low Power Subsystem PWM

	  controller.
@@ -157,6 +159,24 @@ config PWM_LPSS 
	  To compile this driver as a module, choose M here: the module

	  will be called pwm-lpss.



config PWM_LPSS_PCI

	tristate "Intel LPSS PWM PCI driver"

	depends on PWM_LPSS && PCI

	help

	  The PCI driver for Intel Low Power Subsystem PWM controller.



	  To compile this driver as a module, choose M here: the module

	  will be called pwm-lpss-pci.



config PWM_LPSS_PLATFORM

	tristate "Intel LPSS PWM platform driver"

	depends on PWM_LPSS && ACPI

	help

	  The platform driver for Intel Low Power Subsystem PWM controller.



	  To compile this driver as a module, choose M here: the module

	  will be called pwm-lpss-platform.



config PWM_MXS

	tristate "Freescale MXS PWM support"

	depends on ARCH_MXS && OF

drivers/pwm/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -13,6 +13,8 @@ obj-$(CONFIG_PWM_JZ4740) += pwm-jz4740.o 
obj-$(CONFIG_PWM_LP3943)	+= pwm-lp3943.o

obj-$(CONFIG_PWM_LPC32XX)	+= pwm-lpc32xx.o

obj-$(CONFIG_PWM_LPSS)		+= pwm-lpss.o

obj-$(CONFIG_PWM_LPSS_PCI)	+= pwm-lpss-pci.o

obj-$(CONFIG_PWM_LPSS_PLATFORM)	+= pwm-lpss-platform.o

obj-$(CONFIG_PWM_MXS)		+= pwm-mxs.o

obj-$(CONFIG_PWM_PCA9685)	+= pwm-pca9685.o

obj-$(CONFIG_PWM_PUV3)		+= pwm-puv3.o

drivers/pwm/core.c

+15 −16
Original line number Diff line number Diff line
@@ -236,7 +236,7 @@ int pwmchip_add(struct pwm_chip *chip) 
	int ret;



	if (!chip || !chip->dev || !chip->ops || !chip->ops->config ||

	    !chip->ops->enable || !chip->ops->disable)

	    !chip->ops->enable || !chip->ops->disable || !chip->npwm)

		return -EINVAL;



	mutex_lock(&pwm_lock);
@@ -602,12 +602,9 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id) 
	struct pwm_device *pwm = ERR_PTR(-EPROBE_DEFER);

	const char *dev_id = dev ? dev_name(dev) : NULL;

	struct pwm_chip *chip = NULL;

	unsigned int index = 0;

	unsigned int best = 0;

	struct pwm_lookup *p;

	struct pwm_lookup *p, *chosen = NULL;

	unsigned int match;

	unsigned int period;

	enum pwm_polarity polarity;



	/* look up via DT first */

	if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node)
@@ -653,10 +650,7 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id) 
		}



		if (match > best) {

			chip = pwmchip_find_by_name(p->provider);

			index = p->index;

			period = p->period;

			polarity = p->polarity;

			chosen = p;



			if (match != 3)

				best = match;
@@ -665,17 +659,22 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id) 
		}

	}



	mutex_unlock(&pwm_lookup_lock);

	if (!chosen)

		goto out;



	if (chip)

		pwm = pwm_request_from_chip(chip, index, con_id ?: dev_id);

	if (IS_ERR(pwm))

		return pwm;

	chip = pwmchip_find_by_name(chosen->provider);

	if (!chip)

		goto out;



	pwm_set_period(pwm, period);

	pwm_set_polarity(pwm, polarity);

	pwm = pwm_request_from_chip(chip, chosen->index, con_id ?: dev_id);

	if (IS_ERR(pwm))

		goto out;



	pwm_set_period(pwm, chosen->period);

	pwm_set_polarity(pwm, chosen->polarity);



out:

	mutex_unlock(&pwm_lookup_lock);

	return pwm;

}

EXPORT_SYMBOL_GPL(pwm_get);

CRA Git | Maintained and supported by SUSTech CRA and CCSE