[GIT PULL] Renesas ARM Based SoC Clk Updates for v4.4

Hi Olof, Hi Kevin, Hi Arnd,

Please consider these Renesas ARM based SoC clk updates for v4.4.

The patch was acked by Stephen earlier this month
https://lkml.org/lkml/2015/9/17/822


The following changes since commit 6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f:

  Linux 4.3-rc1 (2015-09-12 16:35:56 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas.git tags/renesas-clk-for-v4.4

for you to fetch changes up to e233d74c30f48108b7affb4e76bfc8f3c76b68ce:

  clk: shmobile: mstp: Consider "zb_clk" suitable for power management (2015-09-18 09:11:37 +0900)

----------------------------------------------------------------
Renesas ARM Based SoC Clk Updates for v4.4

* Consider "zb_clk" suitable for power management

  This part of a multi-stage effort by Geert Uytterhoeven to add:

  "Clock Domain support to the Clock Pulse Generator (CPG) Module Stop
   (MSTP) Clocks driver using the generic PM Domain, to be used on shmobile
   SoCs without device power domains (R-Car Gen1 and Gen2, RZ).  This allows
   to power-manage the module clocks of SoC devices that are part of the
   CPG/MSTP Clock Domain using Runtime PM, or for system suspend/resume,
   similar to SoCs with device power domains (SH-Mobile and R-Mobile)."

----------------------------------------------------------------
Geert Uytterhoeven (1):
      clk: shmobile: mstp: Consider "zb_clk" suitable for power management

 drivers/clk/shmobile/clk-mstp.c | 4 ++++
 1 file changed, 4 insertions(+)

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 <redacted>
Acked-by: Stephen Boyd <redacted>
Signed-off-by: Simon Horman <redacted>
---
 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

On Thursday 24 September 2015 14:29:59 Simon Horman wrote:

Renesas ARM Based SoC Clk Updates for v4.4

* Consider "zb_clk" suitable for power management

  This part of a multi-stage effort by Geert Uytterhoeven to add:

  "Clock Domain support to the Clock Pulse Generator (CPG) Module Stop
   (MSTP) Clocks driver using the generic PM Domain, to be used on shmobile
   SoCs without device power domains (R-Car Gen1 and Gen2, RZ).  This allows
   to power-manage the module clocks of SoC devices that are part of the
   CPG/MSTP Clock Domain using Runtime PM, or for system suspend/resume,
   similar to SoCs with device power domains (SH-Mobile and R-Mobile)."

Pulled into next/drivers, thanks!

	Arnd