aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-mx3
diff options
context:
space:
mode:
authorSascha Hauer <s.hauer@pengutronix.de>2009-01-26 15:41:16 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2009-03-13 10:33:46 +0100
commita2865197a5dad23c619c84f44b7fdf7fdbef3f9c (patch)
treee62afa2bf72a8bad1cbfd400f79b92a13617fac6 /arch/arm/mach-mx3
parent5512e88f3a1f1b498fd07181f14596ee117b3471 (diff)
[ARM] MXC: Use a single function for decoding a PLL
We had 3 versions of this function in clock support for MX1/2/3 Use a single one instead. I picked the one from the MX3 as it seems to calculate more accurate as the other ones. Also, on MX27 and MX31 mfn can be negative, this hasn't been handled correctly on MX27 since now. This patch has been tested on MX27 and MX31 and produces the same clock frequencies for me. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-mx3')
-rw-r--r--arch/arm/mach-mx3/clock.c26
1 files changed, 2 insertions, 24 deletions
diff --git a/arch/arm/mach-mx3/clock.c b/arch/arm/mach-mx3/clock.c
index b1746aae1f8..8486ea46d6c 100644
--- a/arch/arm/mach-mx3/clock.c
+++ b/arch/arm/mach-mx3/clock.c
@@ -158,10 +158,8 @@ static int _clk_pll_set_rate(struct clk *clk, unsigned long rate)
static unsigned long _clk_pll_get_rate(struct clk *clk)
{
- long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
unsigned long reg, ccmr;
- s64 temp;
- unsigned int prcs;
+ unsigned int prcs, ref_clk;
ccmr = __raw_readl(MXC_CCM_CCMR);
prcs = (ccmr & MXC_CCM_CCMR_PRCS_MASK) >> MXC_CCM_CCMR_PRCS_OFFSET;
@@ -185,27 +183,7 @@ static unsigned long _clk_pll_get_rate(struct clk *clk)
return 0;
}
- pdf = (reg & MXC_CCM_PCTL_PD_MASK) >> MXC_CCM_PCTL_PD_OFFSET;
- mfd = (reg & MXC_CCM_PCTL_MFD_MASK) >> MXC_CCM_PCTL_MFD_OFFSET;
- mfi = (reg & MXC_CCM_PCTL_MFI_MASK) >> MXC_CCM_PCTL_MFI_OFFSET;
- mfi = (mfi <= 5) ? 5 : mfi;
- mfn = mfn_abs = reg & MXC_CCM_PCTL_MFN_MASK;
-
- if (mfn >= 0x200) {
- mfn |= 0xFFFFFE00;
- mfn_abs = -mfn;
- }
-
- ref_clk *= 2;
- ref_clk /= pdf + 1;
-
- temp = (u64) ref_clk * mfn_abs;
- do_div(temp, mfd + 1);
- if (mfn < 0)
- temp = -temp;
- temp = (ref_clk * mfi) + temp;
-
- return temp;
+ return mxc_decode_pll(reg, ref_clk);
}
static int _clk_usb_pll_enable(struct clk *clk)