[PATCH v2 2/7] clk: zynqmp: do not enable already enabled clocks
m.tretter at pengutronix.de
Thu Jun 24 08:00:49 PDT 2021
The pmu fw manages the permissions who can enable/disable the clocks.
There are a few clocks (TOPSW_LSBUS and LSBUS) which are exposed to
Barebox and Barebox assumes that is has to enable the clocks. However,
the pmu fw considers the clocks under its control and returns a
permission denied for the clock enable request.
Assume that clocks that are already enabled don't need to be enable by
Barebox to avoid the permission denied errors.
Signed-off-by: Michael Tretter <m.tretter at pengutronix.de>
drivers/clk/zynqmp/clk-gate-zynqmp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/clk/zynqmp/clk-gate-zynqmp.c b/drivers/clk/zynqmp/clk-gate-zynqmp.c
index a3b9ee21e506..493c1dfeaaa3 100644
@@ -28,6 +28,9 @@ static int zynqmp_clk_gate_enable(struct clk_hw *hw)
struct zynqmp_clk_gate *gate = to_zynqmp_clk_gate(hw);
+ if (clk_hw_is_enabled(hw))
+ return 0;
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