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From: Tero Kristo <t-kristo@ti.com>
To: linux-omap@vger.kernel.org, tony@atomide.com, j-keerthy@ti.com
Cc: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: OMAP2+: hwmod_core: enable optional clocks before main clock
Date: Fri, 22 Dec 2017 11:26:03 +0200	[thread overview]
Message-ID: <1513934763-23966-1-git-send-email-t-kristo@ti.com> (raw)

The optional clocks must be enabled before the main clock after the
transition to clkctrl controlled clocks is done. Otherwise the module
we attempt to enable might be stuck in transition.

Reported-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
Hi Tony,

This patch fixes a regression seen in linux-next, where certain peripherals
fail to enable after the clkctrl changes are in. The case seen has been
with mcasp3, where it fails to transition to enabled during the audio
driver probe. Not sure where you want to pick this up, maybe as early
rc fixes if its too late to push this to linux-next?

 arch/arm/mach-omap2/omap_hwmod.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 7324048..340d05c 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -976,6 +976,9 @@ static int _enable_clocks(struct omap_hwmod *oh)
 
 	pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name);
 
+	if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
+		_enable_optional_clocks(oh);
+
 	if (oh->_clk)
 		clk_enable(oh->_clk);
 
@@ -984,9 +987,6 @@ static int _enable_clocks(struct omap_hwmod *oh)
 			clk_enable(os->_clk);
 	}
 
-	if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
-		_enable_optional_clocks(oh);
-
 	/* The opt clocks are controlled by the device driver. */
 
 	return 0;
-- 
1.9.1

--
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

WARNING: multiple messages have this Message-ID (diff)
From: t-kristo@ti.com (Tero Kristo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: OMAP2+: hwmod_core: enable optional clocks before main clock
Date: Fri, 22 Dec 2017 11:26:03 +0200	[thread overview]
Message-ID: <1513934763-23966-1-git-send-email-t-kristo@ti.com> (raw)

The optional clocks must be enabled before the main clock after the
transition to clkctrl controlled clocks is done. Otherwise the module
we attempt to enable might be stuck in transition.

Reported-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
Hi Tony,

This patch fixes a regression seen in linux-next, where certain peripherals
fail to enable after the clkctrl changes are in. The case seen has been
with mcasp3, where it fails to transition to enabled during the audio
driver probe. Not sure where you want to pick this up, maybe as early
rc fixes if its too late to push this to linux-next?

 arch/arm/mach-omap2/omap_hwmod.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 7324048..340d05c 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -976,6 +976,9 @@ static int _enable_clocks(struct omap_hwmod *oh)
 
 	pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name);
 
+	if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
+		_enable_optional_clocks(oh);
+
 	if (oh->_clk)
 		clk_enable(oh->_clk);
 
@@ -984,9 +987,6 @@ static int _enable_clocks(struct omap_hwmod *oh)
 			clk_enable(os->_clk);
 	}
 
-	if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
-		_enable_optional_clocks(oh);
-
 	/* The opt clocks are controlled by the device driver. */
 
 	return 0;
-- 
1.9.1

--
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

             reply	other threads:[~2017-12-22  9:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-22  9:26 Tero Kristo [this message]
2017-12-22  9:26 ` [PATCH] ARM: OMAP2+: hwmod_core: enable optional clocks before main clock Tero Kristo
2017-12-22  9:40 ` Keerthy
2017-12-22  9:40   ` Keerthy
2017-12-22 18:51   ` Tony Lindgren
2017-12-22 18:51     ` Tony Lindgren
2018-02-20 12:20     ` Tero Kristo
2018-02-20 12:20       ` Tero Kristo
2018-02-22 17:20       ` Tony Lindgren
2018-02-22 17:20         ` Tony Lindgren

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