From: Lothar Waßmann <LW@KARO-electronics.de>
Date: Fri, 7 Mar 2014 08:26:44 +0000 (+0100)
Subject: pwm: make PWM_POLARITY_INVERTED flag optional
X-Git-Tag: KARO-TX6-CoMTFT-2014-03-07~5
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=commitdiff_plain;h=327ce32143ff68861cb50be1ef645a955399faac

pwm: make PWM_POLARITY_INVERTED flag optional
---

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 608e143a6340..bca83ba2b618 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -131,12 +131,12 @@ static int pwm_device_request(struct pwm_device *pwm, const char *label)
 	return 0;
 }
 
-struct pwm_device *
-of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
+static struct pwm_device *of_pwm_xlate(struct pwm_chip *pc,
+				const struct of_phandle_args *args)
 {
 	struct pwm_device *pwm;
 
-	if (pc->of_pwm_n_cells < 3)
+	if (pc->of_pwm_n_cells < 2)
 		return ERR_PTR(-EINVAL);
 
 	if (args->args[0] >= pc->npwm)
@@ -148,6 +148,9 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
 
 	pwm_set_period(pwm, args->args[1]);
 
+	if (pc->of_pwm_n_cells < 3)
+		return pwm;
+
 	if (args->args[2] & PWM_POLARITY_INVERTED)
 		pwm_set_polarity(pwm, PWM_POLARITY_INVERSED);
 	else
@@ -155,27 +158,14 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
 
 	return pwm;
 }
-EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags);
 
-static struct pwm_device *
-of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)
+struct pwm_device *
+of_pwm_xlate_with_flags(struct pwm_chip *pc,
+			const struct of_phandle_args *args)
 {
-	struct pwm_device *pwm;
-
-	if (pc->of_pwm_n_cells < 2)
-		return ERR_PTR(-EINVAL);
-
-	if (args->args[0] >= pc->npwm)
-		return ERR_PTR(-EINVAL);
-
-	pwm = pwm_request_from_chip(pc, args->args[0], NULL);
-	if (IS_ERR(pwm))
-		return pwm;
-
-	pwm_set_period(pwm, args->args[1]);
-
-	return pwm;
+	return of_pwm_xlate(pc, args);
 }
+EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags);
 
 static void of_pwmchip_add(struct pwm_chip *chip)
 {
@@ -183,7 +173,7 @@ static void of_pwmchip_add(struct pwm_chip *chip)
 		return;
 
 	if (!chip->of_xlate) {
-		chip->of_xlate = of_pwm_simple_xlate;
+		chip->of_xlate = of_pwm_xlate;
 		chip->of_pwm_n_cells = 2;
 	}
 
@@ -536,13 +526,6 @@ struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id)
 		goto put;
 	}
 
-	if (args.args_count != pc->of_pwm_n_cells) {
-		pr_err("%s: wrong #pwm-cells for %s\n", np->full_name,
-			 args.np->full_name);
-		pwm = ERR_PTR(-EINVAL);
-		goto put;
-	}
-
 	pwm = pc->of_xlate(pc, &args);
 	if (IS_ERR(pwm))
 		goto put;