From: Benoit Cousson <b-cousson@ti.com>
Date: Sun, 10 Jul 2011 11:56:30 +0000 (-0600)
Subject: OMAP2+: hwmod: Init clkdm field at boot time
X-Git-Tag: upstream/snapshot3+hdmi~9456^2^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ae769973adf1325115d0dfe3fec17e26cbacd81;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

OMAP2+: hwmod: Init clkdm field at boot time

At boot time, lookup the clkdm_name to get the clkdm
structure pointer for further usage.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 02b6016..1f6f47f 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -990,9 +990,40 @@ static struct omap_hwmod *_lookup(const char *name)
 
 	return oh;
 }
+/**
+ * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Convert a clockdomain name stored in a struct omap_hwmod into a
+ * clockdomain pointer, and save it into the struct omap_hwmod.
+ * return -EINVAL if clkdm_name does not exist or if the lookup failed.
+ */
+static int _init_clkdm(struct omap_hwmod *oh)
+{
+	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+		return 0;
+
+	if (!oh->clkdm_name) {
+		pr_warning("omap_hwmod: %s: no clkdm_name\n", oh->name);
+		return -EINVAL;
+	}
+
+	oh->clkdm = clkdm_lookup(oh->clkdm_name);
+	if (!oh->clkdm) {
+		pr_warning("omap_hwmod: %s: could not associate to clkdm %s\n",
+			oh->name, oh->clkdm_name);
+		return -EINVAL;
+	}
+
+	pr_debug("omap_hwmod: %s: associated to clkdm %s\n",
+		oh->name, oh->clkdm_name);
+
+	return 0;
+}
 
 /**
- * _init_clocks - clk_get() all clocks associated with this hwmod
+ * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as
+ * well the clockdomain.
  * @oh: struct omap_hwmod *
  * @data: not used; pass NULL
  *
@@ -1012,6 +1043,7 @@ static int _init_clocks(struct omap_hwmod *oh, void *data)
 	ret |= _init_main_clk(oh);
 	ret |= _init_interface_clks(oh);
 	ret |= _init_opt_clks(oh);
+	ret |= _init_clkdm(oh);
 
 	if (!ret)
 		oh->_state = _HWMOD_STATE_CLKS_INITED;
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 21d3922..3306bdf 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -516,6 +516,7 @@ struct omap_hwmod {
 	struct clk			*_clk;
 	struct omap_hwmod_opt_clk	*opt_clks;
 	char				*clkdm_name;
+	struct clockdomain		*clkdm;
 	char				*vdd_name;
 	struct voltagedomain		*voltdm;
 	struct omap_hwmod_ocp_if	**masters; /* connect to *_IA */