Doug Anderson wrote: > > The KDIV value is often listed as unsigned but it needs to be treated > as a 16-bit signed value when using it in calculations. Fix our rate > recalculation to do this correctly. > > Before doing this, I tried setting EPLL on exynos5250 to: > rate, m, p, s, k = 80000000, 107, 2, 4, 43691 > > This rate is exactly from the table in the exynos5250 user manual. > > I read this back as 80750003 with: > cat /sys/kernel/debug/clk/fin_pll/fout_epll/clk_rate > > After this patch, it reads back as 80000003 > > mw 0x10020130 a06b0204 > mw 0x10020134 0000aaab > > Signed-off-by: Doug Anderson <diand...@chromium.org>
Yeah, Acked-by: Kukjin Kim <kgene....@samsung.com> Mike, please apply in your fixes. Thanks. - Kukjin > --- > This patch is based upon another in-flight patch to avoid conflicts: > clk: samsung: Use clk->base instead of directly using clk->con0 for > PLL3xxx > https://patchwork.kernel.org/patch/2629751/ > > drivers/clk/samsung/clk-pll.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c > index 01f17cf..26416bb 100644 > --- a/drivers/clk/samsung/clk-pll.c > +++ b/drivers/clk/samsung/clk-pll.c > @@ -115,7 +115,8 @@ static unsigned long > samsung_pll36xx_recalc_rate(struct clk_hw *hw, > unsigned long parent_rate) > { > struct samsung_clk_pll *pll = to_clk_pll(hw); > - u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1; > + u32 mdiv, pdiv, sdiv, pll_con0, pll_con1; > + s16 kdiv; > u64 fvco = parent_rate; > > pll_con0 = pll_readl(pll, PLL36XX_CON0_OFFSET); > @@ -123,7 +124,7 @@ static unsigned long > samsung_pll36xx_recalc_rate(struct clk_hw *hw, > mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK; > pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK; > sdiv = (pll_con0 >> PLL36XX_SDIV_SHIFT) & PLL36XX_SDIV_MASK; > - kdiv = pll_con1 & PLL36XX_KDIV_MASK; > + kdiv = (s16)(pll_con1 & PLL36XX_KDIV_MASK); > > fvco *= (mdiv << 16) + kdiv; > do_div(fvco, (pdiv << sdiv)); > -- > 1.8.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
