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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-25 10:40:15 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-25 10:40:15 -0700 |
commit | ecc5fbd5ef472a4c659dc56a5739b3f041c0530c (patch) | |
tree | eec1c3ddd6082e6391d7d27ae78d813a8f6c216c /drivers/hwmon | |
parent | 1f93d2abf488c6a41bdd5e6caf80b559493eea8d (diff) | |
parent | 18c588786c08458f5d965d8735ab48f9e51e0b4b (diff) | |
download | linux-ecc5fbd5ef472a4c659dc56a5739b3f041c0530c.tar.gz linux-ecc5fbd5ef472a4c659dc56a5739b3f041c0530c.tar.xz |
Merge tag 'pwm/for-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set of changes introduces an atomic API to the PWM subsystem.
This is influenced by the DRM atomic API that was introduced a while
back, though it is obviously a lot simpler. The fundamental idea
remains the same, though: drivers provide a single callback to
implement the atomic configuration of a PWM channel.
As a side-effect the PWM subsystem gains the ability for initial state
retrieval, so that the logical state mirrors that of the hardware.
Many use-cases don't care about this, but for others it is essential.
These new features require changes in all users, which these patches
take care of. The core is transitioned to use the atomic callback if
available and provides a fallback mechanism for other drivers.
Changes to transition users and drivers to the atomic API are
postponed to v4.8"
* tag 'pwm/for-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (30 commits)
pwm: Add information about polarity, duty cycle and period to debugfs
pwm: Switch to the atomic API
pwm: Update documentation
pwm: Add core infrastructure to allow atomic updates
pwm: Add hardware readout infrastructure
pwm: Move the enabled/disabled info into pwm_state
pwm: Introduce the pwm_state concept
pwm: Keep PWM state in sync with hardware state
ARM: Explicitly apply PWM config extracted from pwm_args
drm: i915: Explicitly apply PWM config extracted from pwm_args
input: misc: pwm-beeper: Explicitly apply PWM config extracted from pwm_args
input: misc: max8997: Explicitly apply PWM config extracted from pwm_args
backlight: lm3630a: explicitly apply PWM config extracted from pwm_args
backlight: lp855x: Explicitly apply PWM config extracted from pwm_args
backlight: lp8788: Explicitly apply PWM config extracted from pwm_args
backlight: pwm_bl: Use pwm_get_args() where appropriate
fbdev: ssd1307fb: Use pwm_get_args() where appropriate
regulator: pwm: Use pwm_get_args() where appropriate
leds: pwm: Use pwm_get_args() where appropriate
input: misc: max77693: Use pwm_get_args() where appropriate
...
Diffstat (limited to 'drivers/hwmon')
-rw-r--r-- | drivers/hwmon/pwm-fan.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c index 3e23003f78b0..f9af3935b427 100644 --- a/drivers/hwmon/pwm-fan.c +++ b/drivers/hwmon/pwm-fan.c @@ -40,15 +40,18 @@ struct pwm_fan_ctx { static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm) { + struct pwm_args pargs; unsigned long duty; int ret = 0; + pwm_get_args(ctx->pwm, &pargs); + mutex_lock(&ctx->lock); if (ctx->pwm_value == pwm) goto exit_set_pwm_err; - duty = DIV_ROUND_UP(pwm * (ctx->pwm->period - 1), MAX_PWM); - ret = pwm_config(ctx->pwm, duty, ctx->pwm->period); + duty = DIV_ROUND_UP(pwm * (pargs.period - 1), MAX_PWM); + ret = pwm_config(ctx->pwm, duty, pargs.period); if (ret) goto exit_set_pwm_err; @@ -215,6 +218,7 @@ static int pwm_fan_probe(struct platform_device *pdev) { struct thermal_cooling_device *cdev; struct pwm_fan_ctx *ctx; + struct pwm_args pargs; struct device *hwmon; int duty_cycle; int ret; @@ -233,11 +237,19 @@ static int pwm_fan_probe(struct platform_device *pdev) platform_set_drvdata(pdev, ctx); + /* + * FIXME: pwm_apply_args() should be removed when switching to the + * atomic PWM API. + */ + pwm_apply_args(ctx->pwm); + /* Set duty cycle to maximum allowed */ - duty_cycle = ctx->pwm->period - 1; + pwm_get_args(ctx->pwm, &pargs); + + duty_cycle = pargs.period - 1; ctx->pwm_value = MAX_PWM; - ret = pwm_config(ctx->pwm, duty_cycle, ctx->pwm->period); + ret = pwm_config(ctx->pwm, duty_cycle, pargs.period); if (ret) { dev_err(&pdev->dev, "Failed to configure PWM\n"); return ret; @@ -303,14 +315,16 @@ static int pwm_fan_suspend(struct device *dev) static int pwm_fan_resume(struct device *dev) { struct pwm_fan_ctx *ctx = dev_get_drvdata(dev); + struct pwm_args pargs; unsigned long duty; int ret; if (ctx->pwm_value == 0) return 0; - duty = DIV_ROUND_UP(ctx->pwm_value * (ctx->pwm->period - 1), MAX_PWM); - ret = pwm_config(ctx->pwm, duty, ctx->pwm->period); + pwm_get_args(ctx->pwm, &pargs); + duty = DIV_ROUND_UP(ctx->pwm_value * (pargs.period - 1), MAX_PWM); + ret = pwm_config(ctx->pwm, duty, pargs.period); if (ret) return ret; return pwm_enable(ctx->pwm); |