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clk: rockchip: check grf when waiting pll lock

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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@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Shawn Lin 2016-02-15 11:33:25 +08:00 committed by Heiko Stuebner
parent 282312d1ac
commit eb4e10c61d
1 changed files with 5 additions and 0 deletions
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5
drivers/clk/rockchip/clk-pll.c
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@ -94,6 +94,11 @@ static int rockchip_pll_wait_lock(struct rockchip_clk_pll *pll)
unsigned int val;
int delay = 24000000, ret;
if (IS_ERR(grf)) {
pr_err("%s: grf regmap not available\n", __func__);
return PTR_ERR(grf);
}
while (delay > 0) {
ret = regmap_read(grf, pll->lock_offset, &val);
if (ret) {