diff options
| author | Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> | 2011-12-02 01:16:26 +0400 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-12-09 06:02:25 +0400 |
| commit | f9e5908fa04e15a681dc4695b53c2c0c1d9b9a03 (patch) | |
| tree | e5174f71bffc3b93d4043a2e65756ff9ac85769d /arch/arm/mach-omap1/clock_data.c | |
| parent | 24ce2705c2dd50e51f325c6e57dec378adc8c135 (diff) | |
| download | linux-f9e5908fa04e15a681dc4695b53c2c0c1d9b9a03.tar.xz | |
ARM: OMAP1: Update dpll1 default rate reprogramming method
According to comments in omap1_select_table_rate(), reprogramming dpll1
is tricky, and should always be done from SRAM.
While being at it, move OMAP730 special case handling inside
omap_sram_reprogram_clock().
Created on top of version 2 of the series "ARM: OMAP1: Fix dpll1
reprogramming related issues", which it depends on.
Tested on Amstrad Delta.
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap1/clock_data.c')
| -rw-r--r-- | arch/arm/mach-omap1/clock_data.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/mach-omap1/clock_data.c b/arch/arm/mach-omap1/clock_data.c index ff2d5248df23..9d1a42a5afd8 100644 --- a/arch/arm/mach-omap1/clock_data.c +++ b/arch/arm/mach-omap1/clock_data.c @@ -25,6 +25,7 @@ #include <plat/clock.h> #include <plat/cpu.h> #include <plat/clkdev_omap.h> +#include <plat/sram.h> /* for omap_sram_reprogram_clock() */ #include <plat/usb.h> /* for OTG_BASE */ #include "clock.h" @@ -944,8 +945,10 @@ void __init omap1_clk_late_init(void) /* Find the highest supported frequency and enable it */ if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) { pr_err("System frequencies not set, using default. Check your config.\n"); - omap_writew(0x2290, DPLL_CTL); - omap_writew(cpu_is_omap7xx() ? 0x2005 : 0x0005, ARM_CKCTL); + /* + * Reprogramming the DPLL is tricky, it must be done from SRAM. + */ + omap_sram_reprogram_clock(0x2290, 0x0005); ck_dpll1.rate = OMAP1_DPLL1_SANE_VALUE; } propagate_rate(&ck_dpll1); |