From: Michael Tretter <m.tretter@pengutronix.de> To: barebox@lists.infradead.org Subject: [PATCH v2 2/7] clk: zynqmp: do not enable already enabled clocks Date: Thu, 24 Jun 2021 17:00:49 +0200 [thread overview] Message-ID: <20210624150054.1205422-3-m.tretter@pengutronix.de> (raw) In-Reply-To: <20210624150054.1205422-1-m.tretter@pengutronix.de> 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@pengutronix.de> --- Changelog: v2: none --- 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 --- a/drivers/clk/zynqmp/clk-gate-zynqmp.c +++ b/drivers/clk/zynqmp/clk-gate-zynqmp.c @@ -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; + return gate->ops->clock_enable(gate->clk_id); } -- 2.30.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2021-06-24 15:02 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-24 15:00 [PATCH v2 0/7] ZynqMP: Cleanup and extend board support Michael Tretter 2021-06-24 15:00 ` [PATCH v2 1/7] ARM: zynqmp: set reset source Michael Tretter 2021-06-24 15:00 ` Michael Tretter [this message] 2021-06-24 15:00 ` [PATCH v2 3/7] dts: zcu104: add Barebox environment Michael Tretter 2021-06-24 15:00 ` [PATCH v2 4/7] ARM: zynqmp: add update handler Michael Tretter 2021-06-24 15:00 ` [PATCH v2 5/7] ARM: zynqmp: zcu104: register " Michael Tretter 2021-06-24 15:00 ` [PATCH v2 6/7] ARM: zynqmp: defconfig: enable more features Michael Tretter 2021-06-24 15:00 ` [PATCH v2 7/7] Documentation: zynqmp: add some documentation Michael Tretter 2021-06-25 7:39 ` [PATCH v2 0/7] ZynqMP: Cleanup and extend board support Sascha Hauer
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