rockchip_clk_get_grf pass on return value from
syscon_regmap_lookup_by_phandle, so we check grf to
make sure whether to do the following things or not.
Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
---
drivers/clk/rockchip/clk-pll.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index b7e66c9..dddbc29 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -90,10 +90,16 @@ static long rockchip_pll_round_rate(struct clk_hw *hw,
*/
static int rockchip_pll_wait_lock(struct rockchip_clk_pll *pll)
{
- struct regmap *grf = rockchip_clk_get_grf();
+ struct regmap *grf;
unsigned int val;
int delay = 24000000, ret;
+ grf = rockchip_clk_get_grf();
+ if (IS_ERR(grf)) {
+ pr_err("%s: grf regmap not available\n", __func__);
+ return -ENODEV;
+ }
+
while (delay > 0) {
ret = regmap_read(grf, pll->lock_offset, &val);
if (ret) {
--
2.3.7
