lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[ARM] 4255/1: i.MX/MX1 Correct MPU PLL reference clock value.

Browse Source 
Only System PLL clock source is selectable by CSCR_SYSTEM_SEL
bit. MPU PLL is driven by 512*CLK32 for each case.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Pavel Pisa
2007-03-07 23:56:16 +01:00
committed by Russell King
parent 83b84c4e8c
commit b3c6b76ffb
2 changed files with 8 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-imx/cpufreq.c
View File

@ -83,13 +83,13 @@ static void imx_set_mpctl0(u32 mpctl0)
* imx_compute_mpctl - compute new PLL parameters
* @new_mpctl: pointer to location assigned by new PLL control register value
* @cur_mpctl: current PLL control register parameters
* @f_ref: reference source frequency Hz
* @freq: required frequency in Hz
* @relation: is one of %CPUFREQ_RELATION_L (supremum)
* and %CPUFREQ_RELATION_H (infimum)
*/
long imx_compute_mpctl(u32 *new_mpctl, u32 cur_mpctl, unsigned long freq, int relation)
long imx_compute_mpctl(u32 *new_mpctl, u32 cur_mpctl, u32 f_ref, unsigned long freq, int relation)
{
u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
u32 mfi;
u32 mfn;
u32 mfd;
@ -204,7 +204,7 @@ static int imx_set_target(struct cpufreq_policy *policy,
sysclk = imx_get_system_clk();
if (freq > sysclk / bclk_div_at_boot + 1000000) {
freq = imx_compute_mpctl(&mpctl0, mpctl0_at_boot, freq, relation);
freq = imx_compute_mpctl(&mpctl0, mpctl0_at_boot, CLK32 * 512, freq, relation);
if (freq < 0) {
printk(KERN_WARNING "imx: target frequency %ld Hz cannot be set\n", freq);
return -EINVAL;