diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-14 16:25:43 +0900 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-14 16:25:43 +0900 |
commit | 4b4bb99b6246007eccbc0731eae0b6742c24efa5 (patch) | |
tree | c81d34499eb1e89101741395ef345be43d6a7c71 /drivers/pwm | |
parent | 9bca19a01d50143b736f0f59eb3ccc05b1106172 (diff) | |
parent | 414c52b7899aa9097c2fa8444654a866e1df4a0c (diff) |
Merge tag 'pwm/for-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This contains a couple of fixes and cleanups for the Meson and
ACPI/LPSS drivers as well as capture support for STM32.
Note that given the cross- subsystem changes, the STM32 patches were
merged through the MFD and PWM trees, both sharing an immutable
branch"
* tag 'pwm/for-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: stm32: Fix build warning with CONFIG_DMA_ENGINE disabled
pwm: stm32: Enforce dependency on CONFIG_MFD_STM32_TIMERS
ACPI / LPSS: Add missing prv_offset setting for byt/cht PWM devices
pwm: lpss: platform: Save/restore the ctrl register over a suspend/resume
dt-bindings: mfd: stm32-timers: Add support for dmas
pwm: simplify getting .drvdata
pwm: meson: Fix allocation of PWM channel array
Diffstat (limited to 'drivers/pwm')
-rw-r--r-- | drivers/pwm/Kconfig | 2 | ||||
-rw-r--r-- | drivers/pwm/pwm-atmel-tcb.c | 6 | ||||
-rw-r--r-- | drivers/pwm/pwm-lpss-platform.c | 5 | ||||
-rw-r--r-- | drivers/pwm/pwm-lpss.c | 30 | ||||
-rw-r--r-- | drivers/pwm/pwm-lpss.h | 2 | ||||
-rw-r--r-- | drivers/pwm/pwm-meson.c | 4 | ||||
-rw-r--r-- | drivers/pwm/pwm-rcar.c | 3 | ||||
-rw-r--r-- | drivers/pwm/pwm-stm32.c | 4 |
8 files changed, 44 insertions, 12 deletions
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 4635cb35008c..a4d262db9945 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -401,7 +401,7 @@ config PWM_STI config PWM_STM32 tristate "STMicroelectronics STM32 PWM" - depends on MFD_STM32_TIMERS || COMPILE_TEST + depends on MFD_STM32_TIMERS help Generic PWM framework driver for STM32 SoCs. diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c index 4fb1be246c44..0d0f8376bc35 100644 --- a/drivers/pwm/pwm-atmel-tcb.c +++ b/drivers/pwm/pwm-atmel-tcb.c @@ -460,8 +460,7 @@ MODULE_DEVICE_TABLE(of, atmel_tcb_pwm_dt_ids); #ifdef CONFIG_PM_SLEEP static int atmel_tcb_pwm_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev); + struct atmel_tcb_pwm_chip *tcbpwm = dev_get_drvdata(dev); void __iomem *base = tcbpwm->tc->regs; int i; @@ -478,8 +477,7 @@ static int atmel_tcb_pwm_suspend(struct device *dev) static int atmel_tcb_pwm_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev); + struct atmel_tcb_pwm_chip *tcbpwm = dev_get_drvdata(dev); void __iomem *base = tcbpwm->tc->regs; int i; diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c index 5d6ed1507d29..5561b9e190f8 100644 --- a/drivers/pwm/pwm-lpss-platform.c +++ b/drivers/pwm/pwm-lpss-platform.c @@ -74,6 +74,10 @@ static int pwm_lpss_remove_platform(struct platform_device *pdev) return pwm_lpss_remove(lpwm); } +static SIMPLE_DEV_PM_OPS(pwm_lpss_platform_pm_ops, + pwm_lpss_suspend, + pwm_lpss_resume); + static const struct acpi_device_id pwm_lpss_acpi_match[] = { { "80860F09", (unsigned long)&pwm_lpss_byt_info }, { "80862288", (unsigned long)&pwm_lpss_bsw_info }, @@ -86,6 +90,7 @@ static struct platform_driver pwm_lpss_driver_platform = { .driver = { .name = "pwm-lpss", .acpi_match_table = pwm_lpss_acpi_match, + .pm = &pwm_lpss_platform_pm_ops, }, .probe = pwm_lpss_probe_platform, .remove = pwm_lpss_remove_platform, diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c index 8db0d40ccacd..4721a264bac2 100644 --- a/drivers/pwm/pwm-lpss.c +++ b/drivers/pwm/pwm-lpss.c @@ -32,10 +32,13 @@ /* Size of each PWM register space if multiple */ #define PWM_SIZE 0x400 +#define MAX_PWMS 4 + struct pwm_lpss_chip { struct pwm_chip chip; void __iomem *regs; const struct pwm_lpss_boardinfo *info; + u32 saved_ctrl[MAX_PWMS]; }; static inline struct pwm_lpss_chip *to_lpwm(struct pwm_chip *chip) @@ -177,6 +180,9 @@ struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r, unsigned long c; int ret; + if (WARN_ON(info->npwm > MAX_PWMS)) + return ERR_PTR(-ENODEV); + lpwm = devm_kzalloc(dev, sizeof(*lpwm), GFP_KERNEL); if (!lpwm) return ERR_PTR(-ENOMEM); @@ -212,6 +218,30 @@ int pwm_lpss_remove(struct pwm_lpss_chip *lpwm) } EXPORT_SYMBOL_GPL(pwm_lpss_remove); +int pwm_lpss_suspend(struct device *dev) +{ + struct pwm_lpss_chip *lpwm = dev_get_drvdata(dev); + int i; + + for (i = 0; i < lpwm->info->npwm; i++) + lpwm->saved_ctrl[i] = readl(lpwm->regs + i * PWM_SIZE + PWM); + + return 0; +} +EXPORT_SYMBOL_GPL(pwm_lpss_suspend); + +int pwm_lpss_resume(struct device *dev) +{ + struct pwm_lpss_chip *lpwm = dev_get_drvdata(dev); + int i; + + for (i = 0; i < lpwm->info->npwm; i++) + writel(lpwm->saved_ctrl[i], lpwm->regs + i * PWM_SIZE + PWM); + + return 0; +} +EXPORT_SYMBOL_GPL(pwm_lpss_resume); + MODULE_DESCRIPTION("PWM driver for Intel LPSS"); MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/pwm/pwm-lpss.h b/drivers/pwm/pwm-lpss.h index 98306bb02cfe..7a4238ad1fcb 100644 --- a/drivers/pwm/pwm-lpss.h +++ b/drivers/pwm/pwm-lpss.h @@ -28,5 +28,7 @@ struct pwm_lpss_boardinfo { struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r, const struct pwm_lpss_boardinfo *info); int pwm_lpss_remove(struct pwm_lpss_chip *lpwm); +int pwm_lpss_suspend(struct device *dev); +int pwm_lpss_resume(struct device *dev); #endif /* __PWM_LPSS_H */ diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c index 0767deba8e62..822860b4801a 100644 --- a/drivers/pwm/pwm-meson.c +++ b/drivers/pwm/pwm-meson.c @@ -541,8 +541,8 @@ static int meson_pwm_probe(struct platform_device *pdev) meson->data = of_device_get_match_data(&pdev->dev); meson->inverter_mask = BIT(meson->chip.npwm) - 1; - channels = devm_kcalloc(&pdev->dev, meson->chip.npwm, sizeof(*meson), - GFP_KERNEL); + channels = devm_kcalloc(&pdev->dev, meson->chip.npwm, + sizeof(*channels), GFP_KERNEL); if (!channels) return -ENOMEM; diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c index 91d11f2e2fef..748f614d5375 100644 --- a/drivers/pwm/pwm-rcar.c +++ b/drivers/pwm/pwm-rcar.c @@ -261,8 +261,7 @@ MODULE_DEVICE_TABLE(of, rcar_pwm_of_table); #ifdef CONFIG_PM_SLEEP static struct pwm_device *rcar_pwm_dev_to_pwm_dev(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct rcar_pwm_chip *rcar_pwm = platform_get_drvdata(pdev); + struct rcar_pwm_chip *rcar_pwm = dev_get_drvdata(dev); struct pwm_chip *chip = &rcar_pwm->chip; return &chip->pwms[0]; diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c index 09383c6720fb..4f842550fbd1 100644 --- a/drivers/pwm/pwm-stm32.c +++ b/drivers/pwm/pwm-stm32.c @@ -484,9 +484,7 @@ static int stm32_pwm_apply_locked(struct pwm_chip *chip, struct pwm_device *pwm, static const struct pwm_ops stm32pwm_ops = { .owner = THIS_MODULE, .apply = stm32_pwm_apply_locked, -#if IS_ENABLED(CONFIG_DMA_ENGINE) - .capture = stm32_pwm_capture, -#endif + .capture = IS_ENABLED(CONFIG_DMA_ENGINE) ? stm32_pwm_capture : NULL, }; static int stm32_pwm_set_breakinput(struct stm32_pwm *priv, |