diff options
| -rw-r--r-- | drivers/pwm/pwm-lpss-pci.c | 32 | ||||
| -rw-r--r-- | drivers/pwm/pwm-lpss-platform.c | 6 | ||||
| -rw-r--r-- | drivers/pwm/pwm-lpss.c | 7 |
3 files changed, 45 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-lpss-pci.c b/drivers/pwm/pwm-lpss-pci.c index c15bc6d00f1a..7160e8ab38a4 100644 --- a/drivers/pwm/pwm-lpss-pci.c +++ b/drivers/pwm/pwm-lpss-pci.c @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/pm_runtime.h> #include "pwm-lpss.h" @@ -33,6 +34,10 @@ static int pwm_lpss_probe_pci(struct pci_dev *pdev, return PTR_ERR(lpwm); pci_set_drvdata(pdev, lpwm); + + pm_runtime_put(&pdev->dev); + pm_runtime_allow(&pdev->dev); + return 0; } @@ -40,9 +45,33 @@ static void pwm_lpss_remove_pci(struct pci_dev *pdev) { struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev); + pm_runtime_forbid(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + pwm_lpss_remove(lpwm); } +#ifdef CONFIG_PM +static int pwm_lpss_runtime_suspend_pci(struct device *dev) +{ + /* + * The PCI core will handle transition to D3 automatically. We only + * need to provide runtime PM hooks for that to happen. + */ + return 0; +} + +static int pwm_lpss_runtime_resume_pci(struct device *dev) +{ + return 0; +} +#endif + +static const struct dev_pm_ops pwm_lpss_pci_pm = { + SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci, + pwm_lpss_runtime_resume_pci, NULL) +}; + static const struct pci_device_id pwm_lpss_pci_ids[] = { { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info}, { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info}, @@ -60,6 +89,9 @@ static struct pci_driver pwm_lpss_driver_pci = { .id_table = pwm_lpss_pci_ids, .probe = pwm_lpss_probe_pci, .remove = pwm_lpss_remove_pci, + .driver = { + .pm = &pwm_lpss_pci_pm, + }, }; module_pci_driver(pwm_lpss_driver_pci); diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c index a914aacf6757..54433fc6d1a4 100644 --- a/drivers/pwm/pwm-lpss-platform.c +++ b/drivers/pwm/pwm-lpss-platform.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include "pwm-lpss.h" @@ -36,6 +37,10 @@ static int pwm_lpss_probe_platform(struct platform_device *pdev) return PTR_ERR(lpwm); platform_set_drvdata(pdev, lpwm); + + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + return 0; } @@ -43,6 +48,7 @@ static int pwm_lpss_remove_platform(struct platform_device *pdev) { struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); return pwm_lpss_remove(lpwm); } diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c index df03b50f20dd..25044104003b 100644 --- a/drivers/pwm/pwm-lpss.c +++ b/drivers/pwm/pwm-lpss.c @@ -16,6 +16,7 @@ #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/pm_runtime.h> #include "pwm-lpss.h" @@ -105,6 +106,8 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm, duty_ns = 1; on_time_div = 255 - (255 * duty_ns / period_ns); + pm_runtime_get_sync(chip->dev); + ctrl = pwm_lpss_read(pwm); ctrl &= ~(PWM_BASE_UNIT_MASK | PWM_ON_TIME_DIV_MASK); ctrl |= (u16) base_unit << PWM_BASE_UNIT_SHIFT; @@ -113,11 +116,14 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm, ctrl |= PWM_SW_UPDATE; pwm_lpss_write(pwm, ctrl); + pm_runtime_put(chip->dev); + return 0; } static int pwm_lpss_enable(struct pwm_chip *chip, struct pwm_device *pwm) { + pm_runtime_get_sync(chip->dev); pwm_lpss_write(pwm, pwm_lpss_read(pwm) | PWM_ENABLE); return 0; } @@ -125,6 +131,7 @@ static int pwm_lpss_enable(struct pwm_chip *chip, struct pwm_device *pwm) static void pwm_lpss_disable(struct pwm_chip *chip, struct pwm_device *pwm) { pwm_lpss_write(pwm, pwm_lpss_read(pwm) & ~PWM_ENABLE); + pm_runtime_put(chip->dev); } static const struct pwm_ops pwm_lpss_ops = { |