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authorGeert Uytterhoeven <geert+renesas@glider.be>2015-08-04 15:25:35 +0200
committerSimon Horman <horms+renesas@verge.net.au>2015-09-18 09:11:37 +0900
commite233d74c30f48108b7affb4e76bfc8f3c76b68ce (patch)
treedb93988b9a7bdcf05b7c73e556643c58a1a325d5
parent6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff)
clk: shmobile: mstp: Consider "zb_clk" suitable for power management
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> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
-rw-r--r--drivers/clk/shmobile/clk-mstp.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c
index b1df7b2f1e97..a0a56e99882a 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++;
}