| Message ID | 20231011184823.443959-10-peter.griffin@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add minimal Tensor/GS101 SoC support and Oriole/Pixel6 board | expand |
On Tue, 17 Oct 2023 at 09:52, Chanwoo Choi <chanwoo@kernel.org> wrote: > > On 23. 10. 12. 03:48, Peter Griffin wrote: > > These plls are found in the Tensor gs101 SoC found in the Pixel 6. > > > > pll0516x: Integer PLL with high frequency > > pll0517x: Integer PLL with middle frequency > > pll0518x: Integer PLL with low frequency > > > > PLL0516x > > FOUT = (MDIV * 2 * FIN)/PDIV * 2^SDIV) > > > > PLL0517x and PLL0518x > > FOUT = (MDIV * FIN)/PDIV*2^SDIV) > > > > The PLLs are similar enough to pll_0822x that the same code can handle > > both. The main difference is the change in the fout formula for the > > high frequency 0516 pll. > > > > Locktime for 516,517 & 518 is 150 the same as the pll_0822x lock factor. > > MDIV, SDIV PDIV masks and bit shifts are also the same as 0822x. > > > > When defining the PLL the "con" parameter should be set to CON3 > > register, like this > > > > PLL(pll_0517x, CLK_FOUT_SHARED0_PLL, "fout_shared0_pll", "oscclk", > > PLL_LOCKTIME_PLL_SHARED0, PLL_CON3_PLL_SHARED0, > > NULL), > > > > Signed-off-by: Peter Griffin <peter.griffin@linaro.org> > > --- > > drivers/clk/samsung/clk-pll.c | 9 ++++++++- > > drivers/clk/samsung/clk-pll.h | 3 +++ > > 2 files changed, 11 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c > > index 74934c6182ce..4ef9fea2a425 100644 > > --- a/drivers/clk/samsung/clk-pll.c > > +++ b/drivers/clk/samsung/clk-pll.c > > @@ -442,7 +442,11 @@ static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw, > > pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK; > > sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK; > > > > - fvco *= mdiv; > > + if (pll->type == pll_0516x) > > + fvco = fvco * 2 * mdiv; > > + else > > + fvco *= mdiv; > > + > > do_div(fvco, (pdiv << sdiv)); > > > > return (unsigned long)fvco; > > @@ -1316,6 +1320,9 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx, > > case pll_1417x: > > case pll_0818x: > > case pll_0822x: > > + case pll_0516x: > > + case pll_0517x: > > + case pll_0518x: > > pll->enable_offs = PLL0822X_ENABLE_SHIFT; > > pll->lock_offs = PLL0822X_LOCK_STAT_SHIFT; > > if (!pll->rate_table) > > diff --git a/drivers/clk/samsung/clk-pll.h b/drivers/clk/samsung/clk-pll.h > > index 0725d485c6ee..ffd3d52c0dec 100644 > > --- a/drivers/clk/samsung/clk-pll.h > > +++ b/drivers/clk/samsung/clk-pll.h > > @@ -38,6 +38,9 @@ enum samsung_pll_type { > > pll_0822x, > > pll_0831x, > > pll_142xx, > > + pll_0516x, > > + pll_0517x, > > + pll_0518x, > > }; > > > > #define PLL_RATE(_fin, _m, _p, _s, _k, _ks) \ > > I replied it with ack before. Again, reply it with ack. > > Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Thanks Chanwoo. I will add that in v4
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c index 74934c6182ce..4ef9fea2a425 100644 --- a/drivers/clk/samsung/clk-pll.c +++ b/drivers/clk/samsung/clk-pll.c @@ -442,7 +442,11 @@ static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw, pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK; sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK; - fvco *= mdiv; + if (pll->type == pll_0516x) + fvco = fvco * 2 * mdiv; + else + fvco *= mdiv; + do_div(fvco, (pdiv << sdiv)); return (unsigned long)fvco; @@ -1316,6 +1320,9 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx, case pll_1417x: case pll_0818x: case pll_0822x: + case pll_0516x: + case pll_0517x: + case pll_0518x: pll->enable_offs = PLL0822X_ENABLE_SHIFT; pll->lock_offs = PLL0822X_LOCK_STAT_SHIFT; if (!pll->rate_table) diff --git a/drivers/clk/samsung/clk-pll.h b/drivers/clk/samsung/clk-pll.h index 0725d485c6ee..ffd3d52c0dec 100644 --- a/drivers/clk/samsung/clk-pll.h +++ b/drivers/clk/samsung/clk-pll.h @@ -38,6 +38,9 @@ enum samsung_pll_type { pll_0822x, pll_0831x, pll_142xx, + pll_0516x, + pll_0517x, + pll_0518x, }; #define PLL_RATE(_fin, _m, _p, _s, _k, _ks) \
These plls are found in the Tensor gs101 SoC found in the Pixel 6. pll0516x: Integer PLL with high frequency pll0517x: Integer PLL with middle frequency pll0518x: Integer PLL with low frequency PLL0516x FOUT = (MDIV * 2 * FIN)/PDIV * 2^SDIV) PLL0517x and PLL0518x FOUT = (MDIV * FIN)/PDIV*2^SDIV) The PLLs are similar enough to pll_0822x that the same code can handle both. The main difference is the change in the fout formula for the high frequency 0516 pll. Locktime for 516,517 & 518 is 150 the same as the pll_0822x lock factor. MDIV, SDIV PDIV masks and bit shifts are also the same as 0822x. When defining the PLL the "con" parameter should be set to CON3 register, like this PLL(pll_0517x, CLK_FOUT_SHARED0_PLL, "fout_shared0_pll", "oscclk", PLL_LOCKTIME_PLL_SHARED0, PLL_CON3_PLL_SHARED0, NULL), Signed-off-by: Peter Griffin <peter.griffin@linaro.org> --- drivers/clk/samsung/clk-pll.c | 9 ++++++++- drivers/clk/samsung/clk-pll.h | 3 +++ 2 files changed, 11 insertions(+), 1 deletion(-)