Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b3c6b76ffb1a8c8d1f12e838a25c1a86f5316e2c
Commit: b3c6b76ffb1a8c8d1f12e838a25c1a86f5316e2c
Parent: 83b84c4e8c7cf00e26610f03ee59e9be010f527c
Author: Pavel Pisa <[EMAIL PROTECTED]>
AuthorDate: Wed Mar 7 23:56:16 2007 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Mon Mar 12 16:49:35 2007 +0000
[ARM] 4255/1: i.MX/MX1 Correct MPU PLL reference clock value.
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 <[EMAIL PROTECTED]>
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
arch/arm/mach-imx/cpufreq.c | 6 +++---
arch/arm/mach-imx/generic.c | 9 +++++----
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-imx/cpufreq.c b/arch/arm/mach-imx/cpufreq.c
index 43525ee..7e70e0b 100644
--- a/arch/arm/mach-imx/cpufreq.c
+++ b/arch/arm/mach-imx/cpufreq.c
@@ -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;
diff --git a/arch/arm/mach-imx/generic.c b/arch/arm/mach-imx/generic.c
index b5aa49d..7a7fa51 100644
--- a/arch/arm/mach-imx/generic.c
+++ b/arch/arm/mach-imx/generic.c
@@ -102,7 +102,7 @@ EXPORT_SYMBOL(imx_gpio_mode);
* f = 2 * f_ref * --------------------
* pd + 1
*/
-static unsigned int imx_decode_pll(unsigned int pll)
+static unsigned int imx_decode_pll(unsigned int pll, u32 f_ref)
{
unsigned long long ll;
unsigned long quot;
@@ -111,7 +111,6 @@ static unsigned int imx_decode_pll(unsigned int pll)
u32 mfn = pll & 0x3ff;
u32 mfd = (pll >> 16) & 0x3ff;
u32 pd = (pll >> 26) & 0xf;
- u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
mfi = mfi <= 5 ? 5 : mfi;
@@ -124,13 +123,15 @@ static unsigned int imx_decode_pll(unsigned int pll)
unsigned int imx_get_system_clk(void)
{
- return imx_decode_pll(SPCTL0);
+ u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
+
+ return imx_decode_pll(SPCTL0, f_ref);
}
EXPORT_SYMBOL(imx_get_system_clk);
unsigned int imx_get_mcu_clk(void)
{
- return imx_decode_pll(MPCTL0);
+ return imx_decode_pll(MPCTL0, CLK32 * 512);
}
EXPORT_SYMBOL(imx_get_mcu_clk);
-
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