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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 <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Tom Warren 2013-04-03 14:39:30 -07:00
parent b40f734af9
commit d94c2dbd0a
2 changed files with 6 additions and 8 deletions
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10
arch/arm/cpu/arm720t/tegra114/cpu.c
View File

@ -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);

4
arch/arm/cpu/arm720t/tegra30/cpu.c
View File

@ -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