提交 f0587b63 编写于 作者: P Paul Walmsley 提交者: Russell King

[ARM] OMAP3 clock: fix DPLL jitter correction and rate programming

Fix DPLL jitter correction programming.  Previously,
omap3_noncore_dpll_program() stored the FREQSEL jitter correction
parameter to the wrong register.  This caused jitter correction to be set
incorrectly and also caused the DPLL divider to be programmed incorrectly.

Also, fix DPLL divider programming.  An off-by-one error existed in
omap3_noncore_dpll_program(), causing DPLLs to be programmed with a higher
divider than intended.

linux-omap source commit is 5c0ec88a2145cdf2f2c9cc5fae49635c4c2476c7.
Signed-off-by: NPaul Walmsley <paul@pwsan.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
上级 f266950d
......@@ -563,14 +563,17 @@ static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
/* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */
_omap3_noncore_dpll_bypass(clk);
/* Set jitter correction */
v = __raw_readl(dd->control_reg);
v &= ~dd->freqsel_mask;
v |= freqsel << __ffs(dd->freqsel_mask);
__raw_writel(v, dd->control_reg);
/* Set DPLL multiplier, divider */
v = __raw_readl(dd->mult_div1_reg);
v &= ~(dd->mult_mask | dd->div1_mask);
/* Set mult (M), div1 (N), freqsel */
v |= m << __ffs(dd->mult_mask);
v |= n << __ffs(dd->div1_mask);
v |= freqsel << __ffs(dd->freqsel_mask);
v |= (n - 1) << __ffs(dd->div1_mask);
__raw_writel(v, dd->mult_div1_reg);
/* We let the clock framework set the other output dividers later */
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册