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path: root/drivers/pwm/pwm-sti.c
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Diffstat (limited to 'drivers/pwm/pwm-sti.c')
-rw-r--r--drivers/pwm/pwm-sti.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c
index 652fdb8dc..0a7920cbd 100644
--- a/drivers/pwm/pwm-sti.c
+++ b/drivers/pwm/pwm-sti.c
@@ -395,8 +395,17 @@ out:
static int sti_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
const struct pwm_state *state)
{
+ struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
+ struct sti_pwm_compat_data *cdata = pc->cdata;
+ struct device *dev = pc->dev;
int err;
+ if (pwm->hwpwm >= cdata->pwm_num_devs) {
+ dev_err(dev, "device %u is not valid for pwm mode\n",
+ pwm->hwpwm);
+ return -EINVAL;
+ }
+
if (state->polarity != PWM_POLARITY_NORMAL)
return -EINVAL;
@@ -647,7 +656,7 @@ static int sti_pwm_probe(struct platform_device *pdev)
pc->chip.dev = dev;
pc->chip.ops = &sti_pwm_ops;
- pc->chip.npwm = pc->cdata->pwm_num_devs;
+ pc->chip.npwm = max(cdata->pwm_num_devs, cdata->cpt_num_devs);
for (i = 0; i < cdata->cpt_num_devs; i++) {
struct sti_cpt_ddata *ddata = &cdata->ddata[i];