From d94c2dbd0a55d742ab6ed9bd0c51b27ceed4084e Mon Sep 17 00:00:00 2001 From: Tom Warren Date: Wed, 3 Apr 2013 14:39:30 -0700 Subject: [PATCH] Tegra: Fix MSELECT clock divisors for T30/T114. A comparison of registers between our internal NV U-Boot and u-boot-tegra/next showed some discrepancies in the MSELECT clock divisor programming. T20 doesn't have a MSELECT clk src reg. Signed-off-by: Tom Warren Reviewed-by: Stephen Warren --- arch/arm/cpu/arm720t/tegra114/cpu.c | 10 ++++------ arch/arm/cpu/arm720t/tegra30/cpu.c | 4 ++-- 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/arch/arm/cpu/arm720t/tegra114/cpu.c b/arch/arm/cpu/arm720t/tegra114/cpu.c index 6a94179d4a..51ecff794f 100644 --- a/arch/arm/cpu/arm720t/tegra114/cpu.c +++ b/arch/arm/cpu/arm720t/tegra114/cpu.c @@ -170,15 +170,13 @@ void t114_init_clocks(void) clock_set_enable(PERIPH_ID_MC1, 1); clock_set_enable(PERIPH_ID_DVFS, 1); - /* Switch MSELECT clock to PLLP (00) */ - clock_ll_set_source(PERIPH_ID_MSELECT, 0); - /* - * Clock divider request for 102MHz would setup MSELECT clock as - * 102MHz for PLLP base 408MHz + * Set MSELECT clock source as PLLP (00), and ask for a clock + * divider that would set the MSELECT clock at 102MHz for a + * PLLP base of 408MHz. */ clock_ll_set_source_divisor(PERIPH_ID_MSELECT, 0, - (NVBL_PLLP_KHZ/102000)); + CLK_DIVIDER(NVBL_PLLP_KHZ, 102000)); /* I2C5 (DVC) gets CLK_M and a divisor of 17 */ clock_ll_set_source_divisor(PERIPH_ID_I2C5, 3, 16); diff --git a/arch/arm/cpu/arm720t/tegra30/cpu.c b/arch/arm/cpu/arm720t/tegra30/cpu.c index dedcdd9b08..e162357484 100644 --- a/arch/arm/cpu/arm720t/tegra30/cpu.c +++ b/arch/arm/cpu/arm720t/tegra30/cpu.c @@ -110,8 +110,8 @@ void t30_init_clocks(void) reset_set_enable(PERIPH_ID_MSELECT, 1); clock_set_enable(PERIPH_ID_MSELECT, 1); - /* Switch MSELECT clock to PLLP (00) */ - clock_ll_set_source(PERIPH_ID_MSELECT, 0); + /* Switch MSELECT clock to PLLP (00) and use a divisor of 2 */ + clock_ll_set_source_divisor(PERIPH_ID_MSELECT, 0, 2); /* * Our high-level clock routines are not available prior to -- 2.25.1