[PATCH 6/7] tegra: set AHB clock rate early

[Lucas Stach]

Avoids glitches in later starup phases.

Signed-off-by: Lucas Stach <dev at 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