Currently the CPG Clock Domain code looks for MSTP clocks to power
manage a device.
Unfortunately, on R-Mobile APE6 (r8a73a4) and SH-Mobile AG5 (sh73a0),
the Bus State Controller (BSC) is not power-managed by an MSTP clock,
but by a plain CPG clock (zb_clk). Add a special case to handle this,
so the clock is properly managed, and devices connected to the BSC work
as expected.
Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
---
v2:
- New.
---
drivers/clk/shmobile/clk-mstp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c
index 619f3eccefd4884f..19e2b11953383587 100644
--- a/drivers/clk/shmobile/clk-mstp.c
+++ b/drivers/clk/shmobile/clk-mstp.c
@@ -258,6 +258,10 @@ int cpg_mstp_attach_dev(struct generic_pm_domain *domain,
struct device *dev)
"renesas,cpg-mstp-clocks"))
goto found;
+ /* BSC on r8a73a4/sh73a0 uses zb_clk instead of an mstp clock*/
+ if (!strcmp(clkspec.np->name, "zb_clk"))
+ goto found;
+
of_node_put(clkspec.np);
i++;
}
--
1.9.1
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