| Message ID | 1370003496-19288-5-git-send-email-vikas.sajjan@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Vikas and Yadwinder, On Fri, May 31, 2013 at 5:31 AM, Vikas Sajjan <vikas.sajjan@linaro.org> wrote: > struct clk * __init samsung_clk_register_pll36xx(const char *name, > @@ -264,6 +318,11 @@ struct clk * __init samsung_clk_register_pll36xx(const char *name, > init.parent_names = &pname; > init.num_parents = 1; > > + if (rate_table && rate_count) > + init.ops = &samsung_pll36xx_clk_ops; > + else > + init.ops = &samsung_pll36xx_clk_min_ops; > + > pll->hw.init = &init; > pll->base = base; > pll->rate_table = rate_table; Interesting. In the gerrit review you sent for v2 you properly removed the line: init.ops = &samsung_pll36xx_clk_ops; ...but the v2 you posted upstream didn't have that removal. You've also lost it in v3. Perhaps you can add that back in? I'll do it locally before applying. -Doug
On Friday 31 of May 2013 18:01:34 Vikas Sajjan wrote: > This patch adds set_rate and round_rate clk_ops for PLL36xx > > Reviewed-by: Doug Anderson <dianders@chromium.org> > Signed-off-by: Vikas Sajjan <vikas.sajjan@linaro.org> > --- > drivers/clk/samsung/clk-pll.c | 59 > +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 > insertions(+) > > diff --git a/drivers/clk/samsung/clk-pll.c > b/drivers/clk/samsung/clk-pll.c index 9591560..7143ed89 100644 > --- a/drivers/clk/samsung/clk-pll.c > +++ b/drivers/clk/samsung/clk-pll.c > @@ -210,6 +210,9 @@ struct clk * __init > samsung_clk_register_pll35xx(const char *name, #define > PLL36XX_CON0_OFFSET (0x100) > #define PLL36XX_CON1_OFFSET (0x104) > > +/* Maximum lock time can be 3000 * PDIV cycles */ > +#define PLL36XX_LOCK_FACTOR (3000) > + > #define PLL36XX_KDIV_MASK (0xFFFF) > #define PLL36XX_MDIV_MASK (0x1FF) > #define PLL36XX_PDIV_MASK (0x3F) > @@ -217,6 +220,8 @@ struct clk * __init > samsung_clk_register_pll35xx(const char *name, #define > PLL36XX_MDIV_SHIFT (16) > #define PLL36XX_PDIV_SHIFT (8) > #define PLL36XX_SDIV_SHIFT (0) > +#define PLL36XX_KDIV_SHIFT (0) > +#define PLL36XX_LOCK_STAT_SHIFT (29) > > static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw, > unsigned long parent_rate) > @@ -239,8 +244,57 @@ static unsigned long > samsung_pll36xx_recalc_rate(struct clk_hw *hw, return (unsigned > long)fvco; > } > > +static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long > drate, + unsigned long parent_rate) > +{ > + struct samsung_clk_pll *pll = to_clk_pll(hw); > + u32 tmp, pll_con0, pll_con1; > + const struct samsung_pll_rate_table *rate; > + > + rate = samsung_get_pll_settings(pll, drate); > + if (!rate) { > + pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__, > + drate, __clk_get_name(hw->clk)); > + return -EINVAL; > + } > + > + pll_con0 = pll_readl(pll, PLL36XX_CON0_OFFSET); > + pll_con1 = pll_readl(pll, PLL36XX_CON1_OFFSET); Hmm, PLL35xx has a fast path when only the S divisor changes. I'm not sure about any technical differences between these two PLLs (other than having the extra K factor and some more tunnables), but maybe it is possible for this one as well? Otherwise looks fine. Reviewed-by: Tomasz Figa <t.figa@samsung.com> > + > + /* Set PLL lock time. */ > + pll_writel(pll, (rate->pdiv * PLL36XX_LOCK_FACTOR), > + PLL36XX_LOCK_OFFSET); > + > + /* Change PLL PMS values */ > + pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) | > + (PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) | > + (PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT)); > + pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) | > + (rate->pdiv << PLL36XX_PDIV_SHIFT) | > + (rate->sdiv << PLL36XX_SDIV_SHIFT); > + pll_writel(pll, pll_con0, PLL36XX_CON0_OFFSET); > + > + pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT); > + pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT; > + pll_writel(pll, pll_con1, PLL36XX_CON1_OFFSET); > + > + /* wait_lock_time */ > + do { > + cpu_relax(); > + tmp = pll_readl(pll, PLL36XX_CON0_OFFSET); > + } while (!(tmp & (1 << PLL36XX_LOCK_STAT_SHIFT))); > + > + return 0; > +} > + > static const struct clk_ops samsung_pll36xx_clk_ops = { > .recalc_rate = samsung_pll36xx_recalc_rate, > + .set_rate = samsung_pll36xx_set_rate, > + .round_rate = samsung_pll_round_rate, > +}; > + > +static const struct clk_ops samsung_pll36xx_clk_min_ops = { > + .recalc_rate = samsung_pll36xx_recalc_rate, > }; > > struct clk * __init samsung_clk_register_pll36xx(const char *name, > @@ -264,6 +318,11 @@ struct clk * __init > samsung_clk_register_pll36xx(const char *name, init.parent_names = > &pname; > init.num_parents = 1; > > + if (rate_table && rate_count) > + init.ops = &samsung_pll36xx_clk_ops; > + else > + init.ops = &samsung_pll36xx_clk_min_ops; > + > pll->hw.init = &init; > pll->base = base; > pll->rate_table = rate_table;
Hi Tomasz, On Sat, Jun 8, 2013 at 5:47 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote: > On Friday 31 of May 2013 18:01:34 Vikas Sajjan wrote: >> This patch adds set_rate and round_rate clk_ops for PLL36xx >> >> Reviewed-by: Doug Anderson <dianders@chromium.org> >> Signed-off-by: Vikas Sajjan <vikas.sajjan@linaro.org> >> --- >> drivers/clk/samsung/clk-pll.c | 59 >> +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 >> insertions(+) >> >> diff --git a/drivers/clk/samsung/clk-pll.c >> b/drivers/clk/samsung/clk-pll.c index 9591560..7143ed89 100644 >> --- a/drivers/clk/samsung/clk-pll.c >> +++ b/drivers/clk/samsung/clk-pll.c >> @@ -210,6 +210,9 @@ struct clk * __init >> samsung_clk_register_pll35xx(const char *name, #define >> PLL36XX_CON0_OFFSET (0x100) >> #define PLL36XX_CON1_OFFSET (0x104) >> >> +/* Maximum lock time can be 3000 * PDIV cycles */ >> +#define PLL36XX_LOCK_FACTOR (3000) >> + >> #define PLL36XX_KDIV_MASK (0xFFFF) >> #define PLL36XX_MDIV_MASK (0x1FF) >> #define PLL36XX_PDIV_MASK (0x3F) >> @@ -217,6 +220,8 @@ struct clk * __init >> samsung_clk_register_pll35xx(const char *name, #define >> PLL36XX_MDIV_SHIFT (16) >> #define PLL36XX_PDIV_SHIFT (8) >> #define PLL36XX_SDIV_SHIFT (0) >> +#define PLL36XX_KDIV_SHIFT (0) >> +#define PLL36XX_LOCK_STAT_SHIFT (29) >> >> static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw, >> unsigned long parent_rate) >> @@ -239,8 +244,57 @@ static unsigned long >> samsung_pll36xx_recalc_rate(struct clk_hw *hw, return (unsigned >> long)fvco; >> } >> >> +static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long >> drate, + unsigned long parent_rate) >> +{ >> + struct samsung_clk_pll *pll = to_clk_pll(hw); >> + u32 tmp, pll_con0, pll_con1; >> + const struct samsung_pll_rate_table *rate; >> + >> + rate = samsung_get_pll_settings(pll, drate); >> + if (!rate) { >> + pr_err("%s: Invalid rate : %lu for pll clk %s\n", > __func__, >> + drate, __clk_get_name(hw->clk)); >> + return -EINVAL; >> + } >> + >> + pll_con0 = pll_readl(pll, PLL36XX_CON0_OFFSET); >> + pll_con1 = pll_readl(pll, PLL36XX_CON1_OFFSET); > > Hmm, PLL35xx has a fast path when only the S divisor changes. I'm not sure > about any technical differences between these two PLLs (other than having > the extra K factor and some more tunnables), but maybe it is possible for > this one as well? Sure, will check and respin once tested. Yadwinder will respin the next version of this patch series , as i am off this week. > > Otherwise looks fine. > > Reviewed-by: Tomasz Figa <t.figa@samsung.com> Thanks. > >> + >> + /* Set PLL lock time. */ >> + pll_writel(pll, (rate->pdiv * PLL36XX_LOCK_FACTOR), >> + PLL36XX_LOCK_OFFSET); >> + >> + /* Change PLL PMS values */ >> + pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) | >> + (PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) | >> + (PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT)); >> + pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) | >> + (rate->pdiv << PLL36XX_PDIV_SHIFT) | >> + (rate->sdiv << PLL36XX_SDIV_SHIFT); >> + pll_writel(pll, pll_con0, PLL36XX_CON0_OFFSET); >> + >> + pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT); >> + pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT; >> + pll_writel(pll, pll_con1, PLL36XX_CON1_OFFSET); >> + >> + /* wait_lock_time */ >> + do { >> + cpu_relax(); >> + tmp = pll_readl(pll, PLL36XX_CON0_OFFSET); >> + } while (!(tmp & (1 << PLL36XX_LOCK_STAT_SHIFT))); >> + >> + return 0; >> +} >> + >> static const struct clk_ops samsung_pll36xx_clk_ops = { >> .recalc_rate = samsung_pll36xx_recalc_rate, >> + .set_rate = samsung_pll36xx_set_rate, >> + .round_rate = samsung_pll_round_rate, >> +}; >> + >> +static const struct clk_ops samsung_pll36xx_clk_min_ops = { >> + .recalc_rate = samsung_pll36xx_recalc_rate, >> }; >> >> struct clk * __init samsung_clk_register_pll36xx(const char *name, >> @@ -264,6 +318,11 @@ struct clk * __init >> samsung_clk_register_pll36xx(const char *name, init.parent_names = >> &pname; >> init.num_parents = 1; >> >> + if (rate_table && rate_count) >> + init.ops = &samsung_pll36xx_clk_ops; >> + else >> + init.ops = &samsung_pll36xx_clk_min_ops; >> + >> pll->hw.init = &init; >> pll->base = base; >> pll->rate_table = rate_table; > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c index 9591560..7143ed89 100644 --- a/drivers/clk/samsung/clk-pll.c +++ b/drivers/clk/samsung/clk-pll.c @@ -210,6 +210,9 @@ struct clk * __init samsung_clk_register_pll35xx(const char *name, #define PLL36XX_CON0_OFFSET (0x100) #define PLL36XX_CON1_OFFSET (0x104) +/* Maximum lock time can be 3000 * PDIV cycles */ +#define PLL36XX_LOCK_FACTOR (3000) + #define PLL36XX_KDIV_MASK (0xFFFF) #define PLL36XX_MDIV_MASK (0x1FF) #define PLL36XX_PDIV_MASK (0x3F) @@ -217,6 +220,8 @@ struct clk * __init samsung_clk_register_pll35xx(const char *name, #define PLL36XX_MDIV_SHIFT (16) #define PLL36XX_PDIV_SHIFT (8) #define PLL36XX_SDIV_SHIFT (0) +#define PLL36XX_KDIV_SHIFT (0) +#define PLL36XX_LOCK_STAT_SHIFT (29) static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) @@ -239,8 +244,57 @@ static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw, return (unsigned long)fvco; } +static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long drate, + unsigned long parent_rate) +{ + struct samsung_clk_pll *pll = to_clk_pll(hw); + u32 tmp, pll_con0, pll_con1; + const struct samsung_pll_rate_table *rate; + + rate = samsung_get_pll_settings(pll, drate); + if (!rate) { + pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__, + drate, __clk_get_name(hw->clk)); + return -EINVAL; + } + + pll_con0 = pll_readl(pll, PLL36XX_CON0_OFFSET); + pll_con1 = pll_readl(pll, PLL36XX_CON1_OFFSET); + + /* Set PLL lock time. */ + pll_writel(pll, (rate->pdiv * PLL36XX_LOCK_FACTOR), + PLL36XX_LOCK_OFFSET); + + /* Change PLL PMS values */ + pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) | + (PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) | + (PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT)); + pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) | + (rate->pdiv << PLL36XX_PDIV_SHIFT) | + (rate->sdiv << PLL36XX_SDIV_SHIFT); + pll_writel(pll, pll_con0, PLL36XX_CON0_OFFSET); + + pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT); + pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT; + pll_writel(pll, pll_con1, PLL36XX_CON1_OFFSET); + + /* wait_lock_time */ + do { + cpu_relax(); + tmp = pll_readl(pll, PLL36XX_CON0_OFFSET); + } while (!(tmp & (1 << PLL36XX_LOCK_STAT_SHIFT))); + + return 0; +} + static const struct clk_ops samsung_pll36xx_clk_ops = { .recalc_rate = samsung_pll36xx_recalc_rate, + .set_rate = samsung_pll36xx_set_rate, + .round_rate = samsung_pll_round_rate, +}; + +static const struct clk_ops samsung_pll36xx_clk_min_ops = { + .recalc_rate = samsung_pll36xx_recalc_rate, }; struct clk * __init samsung_clk_register_pll36xx(const char *name, @@ -264,6 +318,11 @@ struct clk * __init samsung_clk_register_pll36xx(const char *name, init.parent_names = &pname; init.num_parents = 1; + if (rate_table && rate_count) + init.ops = &samsung_pll36xx_clk_ops; + else + init.ops = &samsung_pll36xx_clk_min_ops; + pll->hw.init = &init; pll->base = base; pll->rate_table = rate_table;