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path: root/drivers/clk/rockchip/clk-cpu.c
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Diffstat (limited to 'drivers/clk/rockchip/clk-cpu.c')
-rw-r--r--drivers/clk/rockchip/clk-cpu.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/clk/rockchip/clk-cpu.c b/drivers/clk/rockchip/clk-cpu.c
index 05b3d73bfefa..0e09684d43a5 100644
--- a/drivers/clk/rockchip/clk-cpu.c
+++ b/drivers/clk/rockchip/clk-cpu.c
@@ -124,9 +124,18 @@ static int rockchip_cpuclk_pre_rate_change(struct rockchip_cpuclk *cpuclk,
struct clk_notifier_data *ndata)
{
const struct rockchip_cpuclk_reg_data *reg_data = cpuclk->reg_data;
+ const struct rockchip_cpuclk_rate_table *rate;
unsigned long alt_prate, alt_div;
unsigned long flags;
+ /* check validity of the new rate */
+ rate = rockchip_get_cpuclk_settings(cpuclk, ndata->new_rate);
+ if (!rate) {
+ pr_err("%s: Invalid rate : %lu for cpuclk\n",
+ __func__, ndata->new_rate);
+ return -EINVAL;
+ }
+
alt_prate = clk_get_rate(cpuclk->alt_parent);
spin_lock_irqsave(cpuclk->lock, flags);