[PATCH 5.4 408/434] clk: imx: clk-composite-8m: add lock to gate/mux

Greg Kroah-Hartman
2019-12-29T18:00:13Z

From: Peng Fan <peng.fan@nxp.com>

commit 073a01e8d7c23b3efb59a3d4c20aa546f9ec29a9 upstream.

There is a lock to divider in the composite driver, but that's not
enough. lock to gate/mux are also needed to provide exclusive access
to the register.

Fixes: d3ff9728134e ("clk: imx: Add imx composite clock")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/clk/imx/clk-composite-8m.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/clk/imx/clk-composite-8m.c
+++ b/drivers/clk/imx/clk-composite-8m.c
@@ -142,6 +142,7 @@ struct clk *imx8m_clk_composite_flags(co
mux->reg = reg;
mux->shift = PCG_PCS_SHIFT;
mux->mask = PCG_PCS_MASK;
+ mux->lock = &imx_ccm_lock;

div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div)
@@ -161,6 +162,7 @@ struct clk *imx8m_clk_composite_flags(co
gate_hw = &gate->hw;
gate->reg = reg;
gate->bit_idx = PCG_CGC_SHIFT;
+ gate->lock = &imx_ccm_lock;

hw = clk_hw_register_composite(NULL, name, parent_names, num_parents,
mux_hw, &clk_mux_ops, div_hw,