Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH v4 15/16] clk: shmobile: mstp: Consider "zb_clk" suitable for power management | Date | Tue, 4 Aug 2015 14:28:16 +0200 |
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Currently the CPG/MSTP 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+renesas@glider.be> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> --- v4: - Add Reviewed-by,
v3: - Use "CPG/MSTP Clock Domain" instead of "CPG Clock Domain",
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 b1df7b2f1e970adb..a117c3f0f257b5e1 100644 --- a/drivers/clk/shmobile/clk-mstp.c +++ b/drivers/clk/shmobile/clk-mstp.c @@ -259,6 +259,10 @@ 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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