From: Simon Horman <horms+renesas@verge.net.au> To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] clk: shmobile: mstp: Consider "zb_clk" suitable for power management Date: Thu, 24 Sep 2015 05:30:13 +0000 [thread overview] Message-ID: <e233d74c30f48108b7affb4e76bfc8f3c76b68ce.1443072085.git.horms+renesas@verge.net.au> (raw) In-Reply-To: <cover.1443072085.git.horms+renesas@verge.net.au> From: Geert Uytterhoeven <geert+renesas@glider.be> 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> --- 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 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++; } -- 2.1.4
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From: horms+renesas@verge.net.au (Simon Horman) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] clk: shmobile: mstp: Consider "zb_clk" suitable for power management Date: Thu, 24 Sep 2015 14:30:13 +0900 [thread overview] Message-ID: <e233d74c30f48108b7affb4e76bfc8f3c76b68ce.1443072085.git.horms+renesas@verge.net.au> (raw) In-Reply-To: <cover.1443072085.git.horms+renesas@verge.net.au> From: Geert Uytterhoeven <geert+renesas@glider.be> 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> --- 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 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++; } -- 2.1.4
next prev parent reply other threads:[~2015-09-24 5:30 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-09-01 2:03 [GIT PULL] Renesas ARM Based SoC Clk Updates for v3.18 Simon Horman 2014-09-01 2:03 ` Simon Horman 2014-09-01 2:03 ` [PATCH] clk: shmobile: Add r8a7794 support Simon Horman 2014-09-01 2:03 ` Simon Horman 2014-09-05 16:14 ` [GIT PULL] Renesas ARM Based SoC Clk Updates for v3.18 Arnd Bergmann 2014-09-05 16:14 ` Arnd Bergmann 2015-09-24 5:29 ` [GIT PULL] Renesas ARM Based SoC Clk Updates for v4.4 Simon Horman 2015-09-24 5:29 ` Simon Horman 2015-09-24 5:30 ` Simon Horman [this message] 2015-09-24 5:30 ` [PATCH] clk: shmobile: mstp: Consider "zb_clk" suitable for power management Simon Horman 2015-10-06 14:47 ` [GIT PULL] Renesas ARM Based SoC Clk Updates for v4.4 Arnd Bergmann 2015-10-06 14:47 ` Arnd Bergmann
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