X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fpwm%2Fpwm-imx.c;h=47799fc0d1fb87c5c5ffb95967264d231825d4b9;hb=d77fa2ff766bbb4b867e791187f78b6033071613;hp=40bf0275437fefbd4deaecd6934e2b4ccb2392aa;hpb=2c19478e01ab145c8b3a1f5b1beca9958d942e98;p=u-boot

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 40bf027543..47799fc0d1 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -18,6 +18,9 @@ int pwm_init(int pwm_id, int div, int invert)
 {
 	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
 
+	if (!pwm)
+		return -1;
+
 	writel(0, &pwm->ir);
 	return 0;
 }
@@ -28,6 +31,9 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns)
 	unsigned long period_cycles, duty_cycles, prescale;
 	u32 cr;
 
+	if (!pwm)
+		return -1;
+
 	pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles,
 			  &prescale);
 
@@ -47,6 +53,9 @@ int pwm_enable(int pwm_id)
 {
 	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
 
+	if (!pwm)
+		return -1;
+
 	setbits_le32(&pwm->cr, PWMCR_EN);
 	return 0;
 }
@@ -55,5 +64,8 @@ void pwm_disable(int pwm_id)
 {
 	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
 
+	if (!pwm)
+		return;
+
 	clrbits_le32(&pwm->cr, PWMCR_EN);
 }