[PATCH v6 5/8] ARM: sun6i: Protect SDRAM gating bit

From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Emilio Lopez <emilio@elopez.com.ar>,
	Dan Williams <dan.j.williams@intel.com>,
	Vinod Koul <vinod.koul@intel.com>
Cc: Mike Turquette <mturquette@linaro.org>,
	linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-sunxi@googlegroups.com, kevin.z.m.zh@gmail.com,
	sunny@allwinnertech.com, shuge@allwinnertech.com,
	zhuzhenhua@allwinnertech.com, andriy.shevchenko@intel.com,
	Arnd Bergmann <arnd@arndb.de>,
	Maxime Ripard <maxime.ripard@free-electrons.com>
Subject: [PATCH v6 5/8] ARM: sun6i: Protect SDRAM gating bit
Date: Thu, 17 Apr 2014 10:46:16 +0200	[thread overview]
Message-ID: <1397724379-15398-6-git-send-email-maxime.ripard@free-electrons.com> (raw)
In-Reply-To: <1397724379-15398-1-git-send-email-maxime.ripard@free-electrons.com>

Prevent the SDRAM controller from being gated by force-enabling it in the
machine code.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 arch/arm/mach-sunxi/sun6i.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-sunxi/sun6i.c b/arch/arm/mach-sunxi/sun6i.c
index 6b3905505fe0..1ccb27524a9e 100644
--- a/arch/arm/mach-sunxi/sun6i.c
+++ b/arch/arm/mach-sunxi/sun6i.c
@@ -34,6 +34,11 @@ static void __init sun6i_dt_init(void)
 	clk = clk_get(NULL, "cpu");
 	if (!IS_ERR(clk))
 		clk_prepare_enable(clk);
+
+	/* DDR gating clock */
+	clk = clk_get(NULL, "ahb1_sdram");
+	if (!IS_ERR(clk))
+		clk_prepare_enable(clk);
 }
 
 extern void __init sun6i_reset_init(void);
-- 
1.9.1

