[PATCH v4 2/7] OMAP2+: clockdomain: Add SoC support for clkdm_allows_idle

[Benoit Cousson <b-cousson@xxxxxx>]

From: Rajendra Nayak <rnayak@xxxxxx>

Add the SoC specific implementation for clkdm_allows_idle
for OMAP2/3 and OMAP4.

Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
[b-cousson@xxxxxx: Update the changelog and subject]
Signed-off-by: Benoit Cousson <b-cousson@xxxxxx>
Cc: Paul Walmsley <paul@xxxxxxxxx>
---
 arch/arm/mach-omap2/clockdomain2xxx_3xxx.c |   12 ++++++++++++
 arch/arm/mach-omap2/clockdomain44xx.c      |    7 +++++++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
index 48d0db7..81f3e46 100644
--- a/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
+++ b/arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/types.h>
+#include <linux/errno.h>
 #include <plat/prcm.h>
 #include "prm.h"
 #include "prm2xxx_3xxx.h"
@@ -146,6 +147,15 @@ static void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
 		_clkdm_del_autodeps(clkdm);
 }
 
+static int omap2_clkdm_allows_idle(struct clockdomain *clkdm)
+{
+	if (!clkdm->clktrctrl_mask)
+		return -EINVAL;
+
+	return omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
+				clkdm->clktrctrl_mask);
+}
+
 static void _enable_hwsup(struct clockdomain *clkdm)
 {
 	if (cpu_is_omap24xx())
@@ -252,6 +262,7 @@ struct clkdm_ops omap2_clkdm_operations = {
 	.clkdm_wakeup		= omap2_clkdm_wakeup,
 	.clkdm_allow_idle	= omap2_clkdm_allow_idle,
 	.clkdm_deny_idle	= omap2_clkdm_deny_idle,
+	.clkdm_allows_idle	= omap2_clkdm_allows_idle,
 	.clkdm_clk_enable	= omap2_clkdm_clk_enable,
 	.clkdm_clk_disable	= omap2_clkdm_clk_disable,
 };
@@ -269,6 +280,7 @@ struct clkdm_ops omap3_clkdm_operations = {
 	.clkdm_wakeup		= omap3_clkdm_wakeup,
 	.clkdm_allow_idle	= omap3_clkdm_allow_idle,
 	.clkdm_deny_idle	= omap3_clkdm_deny_idle,
+	.clkdm_allows_idle	= omap2_clkdm_allows_idle,
 	.clkdm_clk_enable	= omap2_clkdm_clk_enable,
 	.clkdm_clk_disable	= omap2_clkdm_clk_disable,
 };
diff --git a/arch/arm/mach-omap2/clockdomain44xx.c b/arch/arm/mach-omap2/clockdomain44xx.c
index a1a4ecd..1599b18 100644
--- a/arch/arm/mach-omap2/clockdomain44xx.c
+++ b/arch/arm/mach-omap2/clockdomain44xx.c
@@ -93,6 +93,12 @@ static void omap4_clkdm_deny_idle(struct clockdomain *clkdm)
 					clkdm->cm_inst, clkdm->clkdm_offs);
 }
 
+static int omap4_clkdm_allows_idle(struct clockdomain *clkdm)
+{
+	return omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
+				clkdm->cm_inst, clkdm->clkdm_offs);
+}
+
 static int omap4_clkdm_clk_enable(struct clockdomain *clkdm)
 {
 	bool hwsup = false;
@@ -132,6 +138,7 @@ struct clkdm_ops omap4_clkdm_operations = {
 	.clkdm_wakeup		= omap4_clkdm_wakeup,
 	.clkdm_allow_idle	= omap4_clkdm_allow_idle,
 	.clkdm_deny_idle	= omap4_clkdm_deny_idle,
+	.clkdm_allows_idle	= omap4_clkdm_allows_idle,
 	.clkdm_clk_enable	= omap4_clkdm_clk_enable,
 	.clkdm_clk_disable	= omap4_clkdm_clk_disable,
 };
-- 
1.7.0.4

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