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From: Lucas Stach <dev@lynxeye.de>
To: barebox@lists.infradead.org
Subject: [PATCH v2 7/8] tegra: set AHB clock rate early
Date: Mon, 17 Feb 2014 21:27:40 +0100	[thread overview]
Message-ID: <1392668861-10915-8-git-send-email-dev@lynxeye.de> (raw)
In-Reply-To: <1392668861-10915-1-git-send-email-dev@lynxeye.de>

Avoids glitches in later starup phases.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
---
 arch/arm/mach-tegra/include/mach/tegra20-car.h | 4 ++++
 arch/arm/mach-tegra/tegra_avp_init.c           | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/arch/arm/mach-tegra/include/mach/tegra20-car.h b/arch/arm/mach-tegra/include/mach/tegra20-car.h
index a5441de..161e3d8 100644
--- a/arch/arm/mach-tegra/include/mach/tegra20-car.h
+++ b/arch/arm/mach-tegra/include/mach/tegra20-car.h
@@ -112,6 +112,10 @@
 #define CRC_SUPER_SDIV_DIVISOR_SHIFT	0
 #define CRC_SUPER_SDIV_DIVISOR_MASK	(0xff << CRC_SUPER_SDIV_DIVISOR_SHIFT)
 
+#define CRC_CLK_SYSTEM_RATE		0x030
+#define CRC_CLK_SYSTEM_RATE_AHB_SHIFT	4
+#define CRC_CLK_SYSTEM_RATE_APB_SHIFT	0
+
 #define CRC_CLK_CPU_CMPLX		0x04c
 #define CRC_CLK_CPU_CMPLX_CPU3_CLK_STP	(1 << 11)
 #define CRC_CLK_CPU_CMPLX_CPU2_CLK_STP	(1 << 10)
diff --git a/arch/arm/mach-tegra/tegra_avp_init.c b/arch/arm/mach-tegra/tegra_avp_init.c
index 9f8ccf3..4dd1330 100644
--- a/arch/arm/mach-tegra/tegra_avp_init.c
+++ b/arch/arm/mach-tegra/tegra_avp_init.c
@@ -149,6 +149,9 @@ static void start_cpu0_clocks(void)
 	       TEGRA_CLK_RESET_BASE + CRC_SCLK_BURST_POLICY);
 	writel(CRC_SUPER_SDIV_ENB, TEGRA_CLK_RESET_BASE + CRC_SUPER_SCLK_DIV);
 
+	writel(1 << CRC_CLK_SYSTEM_RATE_AHB_SHIFT,
+	       TEGRA_CLK_RESET_BASE + CRC_CLK_SYSTEM_RATE);
+
 	/* deassert clock stop for cpu 0 */
 	reg = readl(TEGRA_CLK_RESET_BASE + CRC_CLK_CPU_CMPLX);
 	reg &= ~CRC_CLK_CPU_CMPLX_CPU0_CLK_STP;
-- 
1.8.5.3


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  parent reply	other threads:[~2014-02-17 20:27 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-17 20:27 [PATCH v2 0/8] Lowlevel Tegra3 support Lucas Stach
2014-02-17 20:27 ` [PATCH v2 1/8] tegra: add -fno-jump-tables to lowlevel code Lucas Stach
2014-02-17 20:27 ` [PATCH v2 2/8] tegra: lowlevel: switch to __always_inline macro Lucas Stach
2014-02-17 20:27 ` [PATCH v2 3/8] tegra: add break to switch statements Lucas Stach
2014-02-17 20:27 ` [PATCH v2 4/8] tegra: add lowlevel delay function Lucas Stach
2014-02-17 20:27 ` [PATCH v2 5/8] tegra: add Tegra3 to relevant lowlevel functions Lucas Stach
2014-02-17 20:27 ` [PATCH v2 6/8] tegra: add lowlevel DVC Lucas Stach
2014-02-17 20:27 ` Lucas Stach [this message]
2014-02-17 20:27 ` [PATCH v2 8/8] tegra: add Tegra3 startup Lucas Stach

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