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path: root/drivers/pwm/pwm-atmel-hlcdc.c
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Diffstat (limited to 'drivers/pwm/pwm-atmel-hlcdc.c')
-rw-r--r--drivers/pwm/pwm-atmel-hlcdc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-atmel-hlcdc.c b/drivers/pwm/pwm-atmel-hlcdc.c
index e7a785fadcdf..522f7075bb1a 100644
--- a/drivers/pwm/pwm-atmel-hlcdc.c
+++ b/drivers/pwm/pwm-atmel-hlcdc.c
@@ -64,6 +64,9 @@ static int atmel_hlcdc_pwm_config(struct pwm_chip *c,
if (!chip->errata || !chip->errata->slow_clk_erratum) {
clk_freq = clk_get_rate(new_clk);
+ if (!clk_freq)
+ return -EINVAL;
+
clk_period_ns = (u64)NSEC_PER_SEC * 256;
do_div(clk_period_ns, clk_freq);
}
@@ -73,6 +76,9 @@ static int atmel_hlcdc_pwm_config(struct pwm_chip *c,
clk_period_ns > period_ns) {
new_clk = hlcdc->sys_clk;
clk_freq = clk_get_rate(new_clk);
+ if (!clk_freq)
+ return -EINVAL;
+
clk_period_ns = (u64)NSEC_PER_SEC * 256;
do_div(clk_period_ns, clk_freq);
}