mfd: cros-ec: Increase maximum mkbp event size

[linux.git] / drivers / pwm / pwm-lpss.c

diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 8db0d40ccacde84a61d292936f6bbdeeed7ac358..4721a264bac2580cf8d21ee54396e0b494f1c9dc 100644 (file)
--- 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 <[email protected]>");
 MODULE_LICENSE("GPL v2");