diff options
Diffstat (limited to 'drivers/clk/nxp')
| -rw-r--r-- | drivers/clk/nxp/clk-lpc18xx-ccu.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/clk/nxp/clk-lpc18xx-ccu.c b/drivers/clk/nxp/clk-lpc18xx-ccu.c index eeaee97da110..13aabbb3acbe 100644 --- a/drivers/clk/nxp/clk-lpc18xx-ccu.c +++ b/drivers/clk/nxp/clk-lpc18xx-ccu.c @@ -179,9 +179,22 @@ static void lpc18xx_ccu_gate_disable(struct clk_hw *hw) static int lpc18xx_ccu_gate_is_enabled(struct clk_hw *hw) { - struct clk_gate *gate = to_clk_gate(hw); + const struct clk_hw *parent; + + /* + * The branch clock registers are only accessible + * if the base (parent) clock is enabled. Register + * access with a disabled base clock will hang the + * system. + */ + parent = clk_hw_get_parent(hw); + if (!parent) + return 0; + + if (!clk_hw_is_enabled(parent)) + return 0; - return clk_readl(gate->reg) & LPC18XX_CCU_RUN; + return clk_gate_ops.is_enabled(hw); } static const struct clk_ops lpc18xx_ccu_gate_ops = { |