Commit 2bcc025a authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Stephen Boyd
Browse files

clk: tegra: Implement disable_unused() of tegra_clk_sdmmc_mux_ops 



Implement disable_unused() callback of tegra_clk_sdmmc_mux_ops to fix
imbalanced disabling of the unused MMC clock on Tegra210 Jetson Nano.

Fixes: c592c8a2 ("clk: tegra: Fix refcounting of gate clocks")
Reported-by: Jon Hunter <jonathanh@nvidia.com> # T210 Nano
Tested-by: Jon Hunter <jonathanh@nvidia.com> # T210 Nano
Acked-by: default avatarJon Hunter <jonathanh@nvidia.com>
Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210717112742.7196-1-digetx@gmail.com


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 4ee107c5

drivers/clk/tegra/clk-sdmmc-mux.c

+10 −0
Original line number Diff line number Diff line
@@ -194,6 +194,15 @@ static void clk_sdmmc_mux_disable(struct clk_hw *hw) 
	gate_ops->disable(gate_hw);

}



static void clk_sdmmc_mux_disable_unused(struct clk_hw *hw)

{

	struct tegra_sdmmc_mux *sdmmc_mux = to_clk_sdmmc_mux(hw);

	const struct clk_ops *gate_ops = sdmmc_mux->gate_ops;

	struct clk_hw *gate_hw = &sdmmc_mux->gate.hw;



	gate_ops->disable_unused(gate_hw);

}



static void clk_sdmmc_mux_restore_context(struct clk_hw *hw)

{

	struct clk_hw *parent = clk_hw_get_parent(hw);
@@ -218,6 +227,7 @@ static const struct clk_ops tegra_clk_sdmmc_mux_ops = { 
	.is_enabled = clk_sdmmc_mux_is_enabled,

	.enable = clk_sdmmc_mux_enable,

	.disable = clk_sdmmc_mux_disable,

	.disable_unused = clk_sdmmc_mux_disable_unused,

	.restore_context = clk_sdmmc_mux_restore_context,

};