Commit fec3c03f authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'for-3.6-rc3' of git://gitorious.org/linux-pwm/linux-pwm 

Pull pwm fixes from Thierry Reding:
 "These patches fix the Samsung PWM driver and perform some minor
  cleanups like fixing checkpatch and sparse warnings.

  Two redundant error messages are removed and the Kconfig help text for
  the PWM subsystem is made more descriptive."

* tag 'for-3.6-rc3' of git://gitorious.org/linux-pwm/linux-pwm:
  pwm: Improve Kconfig help text
  pwm: core: Fix coding style issues
  pwm: vt8500: Fix coding style issue
  pwm: Remove a redundant error message when devm_request_and_ioremap fails
  pwm: samsung: add missing device pointer to struct pwm_chip
  pwm: Add missing static storage class specifiers in core.c file
parents f753c4ec b817bf5c

drivers/pwm/Kconfig

+25 −6
Original line number Diff line number Diff line 
menuconfig PWM

	bool "PWM Support"

	bool "Pulse-Width Modulation (PWM) Support"

	depends on !MACH_JZ4740 && !PUV3_PWM

	help

	  This enables PWM support through the generic PWM framework.

	  You only need to enable this, if you also want to enable

	  one or more of the PWM drivers below.



	  If unsure, say N.

	  Generic Pulse-Width Modulation (PWM) support.



	  In Pulse-Width Modulation, a variation of the width of pulses

	  in a rectangular pulse signal is used as a means to alter the

	  average power of the signal. Applications include efficient

	  power delivery and voltage regulation. In computer systems,

	  PWMs are commonly used to control fans or the brightness of

	  display backlights.



	  This framework provides a generic interface to PWM devices

	  within the Linux kernel. On the driver side it provides an API

	  to register and unregister a PWM chip, an abstraction of a PWM

	  controller, that supports one or more PWM devices. Client

	  drivers can request PWM devices and use the generic framework

	  to configure as well as enable and disable them.



	  This generic framework replaces the legacy PWM framework which

	  allows only a single driver implementing the required API. Not

	  all legacy implementations have been ported to the framework

	  yet. The framework provides an API that is backward compatible

	  with the legacy framework so that existing client drivers

	  continue to work as expected.



	  If unsure, say no.



if PWM

drivers/pwm/core.c

+6 −6
Original line number Diff line number Diff line
@@ -129,8 +129,8 @@ static int pwm_device_request(struct pwm_device *pwm, const char *label) 
	return 0;

}



static struct pwm_device *of_pwm_simple_xlate(struct pwm_chip *pc,

					      const struct of_phandle_args *args)

static struct pwm_device *

of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)

{

	struct pwm_device *pwm;
@@ -149,7 +149,7 @@ static struct pwm_device *of_pwm_simple_xlate(struct pwm_chip *pc, 
	return pwm;

}



void of_pwmchip_add(struct pwm_chip *chip)

static void of_pwmchip_add(struct pwm_chip *chip)

{

	if (!chip->dev || !chip->dev->of_node)

		return;
@@ -162,7 +162,7 @@ void of_pwmchip_add(struct pwm_chip *chip) 
	of_node_get(chip->dev->of_node);

}



void of_pwmchip_remove(struct pwm_chip *chip)

static void of_pwmchip_remove(struct pwm_chip *chip)

{

	if (chip->dev && chip->dev->of_node)

		of_node_put(chip->dev->of_node);
@@ -609,7 +609,7 @@ void pwm_put(struct pwm_device *pwm) 
	mutex_lock(&pwm_lock);



	if (!test_and_clear_bit(PWMF_REQUESTED, &pwm->flags)) {

		pr_warning("PWM device already freed\n");

		pr_warn("PWM device already freed\n");

		goto out;

	}

drivers/pwm/pwm-samsung.c

+1 −0
Original line number Diff line number Diff line
@@ -225,6 +225,7 @@ static int s3c_pwm_probe(struct platform_device *pdev) 


	/* calculate base of control bits in TCON */

	s3c->tcon_base = id == 0 ? 0 : (id * 4) + 4;

	s3c->chip.dev = &pdev->dev;

	s3c->chip.ops = &s3c_pwm_ops;

	s3c->chip.base = -1;

	s3c->chip.npwm = 1;

drivers/pwm/pwm-tegra.c

+1 −3
Original line number Diff line number Diff line
@@ -187,10 +187,8 @@ static int tegra_pwm_probe(struct platform_device *pdev) 
	}



	pwm->mmio_base = devm_request_and_ioremap(&pdev->dev, r);

	if (!pwm->mmio_base) {

		dev_err(&pdev->dev, "failed to ioremap() region\n");

	if (!pwm->mmio_base)

		return -EADDRNOTAVAIL;

	}



	platform_set_drvdata(pdev, pwm);

drivers/pwm/pwm-tiecap.c

+1 −3
Original line number Diff line number Diff line
@@ -192,10 +192,8 @@ static int __devinit ecap_pwm_probe(struct platform_device *pdev) 
	}



	pc->mmio_base = devm_request_and_ioremap(&pdev->dev, r);

	if (!pc->mmio_base) {

		dev_err(&pdev->dev, "failed to ioremap() registers\n");

	if (!pc->mmio_base)

		return -EADDRNOTAVAIL;

	}



	ret = pwmchip_add(&pc->chip);

	if (ret < 0) {

CRA Git | Maintained and supported by SUSTech CRA and CCSE