Renesas ARM Based SoC Updates for v4.4

* ARM: shmobile: R-Mobile: Use CPG/MSTP Clock Domain attach/detach helpers
 
   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)."
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Merge tag 'renesas-soc-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Merge "Renesas ARM Based SoC Updates for v4.4" from Simon Horman:

* ARM: shmobile: R-Mobile: Use CPG/MSTP Clock Domain attach/detach helpers

  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)."

* tag 'renesas-soc-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: R-Mobile: Use CPG/MSTP Clock Domain attach/detach helpers
  clk: shmobile: mstp: Consider "zb_clk" suitable for power management

arch/arm/mach-shmobile/pm-rmobile.c

@@ -12,6 +12,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#include <linux/clk/shmobile.h>
 #include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/of.h>
@@ -124,36 +125,6 @@ static bool rmobile_pd_active_wakeup(struct device *dev)
 	return true;
 }
 
-static int rmobile_pd_attach_dev(struct generic_pm_domain *domain,
-				 struct device *dev)
-{
-	int error;
-
-	error = pm_clk_create(dev);
-	if (error) {
-		dev_err(dev, "pm_clk_create failed %d\n", error);
-		return error;
-	}
-
-	error = pm_clk_add(dev, NULL);
-	if (error) {
-		dev_err(dev, "pm_clk_add failed %d\n", error);
-		goto fail;
-	}
-
-	return 0;
-
-fail:
-	pm_clk_destroy(dev);
-	return error;
-}
-
-static void rmobile_pd_detach_dev(struct generic_pm_domain *domain,
-				  struct device *dev)
-{
-	pm_clk_destroy(dev);
-}
-
 static void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
 {
 	struct generic_pm_domain *genpd = &rmobile_pd->genpd;
@@ -164,8 +135,8 @@ static void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
 	genpd->dev_ops.active_wakeup	= rmobile_pd_active_wakeup;
 	genpd->power_off		= rmobile_pd_power_down;
 	genpd->power_on			= rmobile_pd_power_up;
-	genpd->attach_dev		= rmobile_pd_attach_dev;
-	genpd->detach_dev		= rmobile_pd_detach_dev;
+	genpd->attach_dev		= cpg_mstp_attach_dev;
+	genpd->detach_dev		= cpg_mstp_detach_dev;
 	__rmobile_pd_power_up(rmobile_pd, false);
 }
 

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++;
 	}