Quoting Loic Poulain (2018-11-21 09:36:05)
> Hi Stephen,
>
> On Wed, 21 Nov 2018 at 17:39, Stephen Boyd <sboyd@xxxxxxxxxx> wrote:
>
> Quoting Loic Poulain (2018-11-20 03:14:56)
> > Add SPI friendly clock rates to the spi freq table.
> > Today it's not possible to use SPI at lower than 960Khz.
> > This patch adds 100/250/500/1000 khz configs to the table.
>
> s/khz/kHz/
>
> >
> > Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
> > ---
> > drivers/clk/qcom/gcc-msm8916.c | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/clk/qcom/gcc-msm8916.c b/drivers/clk/qcom/
> gcc-msm8916.c
> > index ac2b0aa..7d9647c 100644
> > --- a/drivers/clk/qcom/gcc-msm8916.c
> > +++ b/drivers/clk/qcom/gcc-msm8916.c
> > @@ -544,7 +544,11 @@ static struct clk_rcg2 blsp1_qup1_i2c_apps_clk_src =
> {
> > };
> >
> > static const struct freq_tbl ftbl_gcc_blsp1_qup1_6_spi_apps_clk[] = {
> > + F(100000, P_XO, 16, 2, 24),
> > + F(250000, P_XO, 16, 5, 24),
> > + F(500000, P_XO, 8, 5, 24),
> > F(960000, P_XO, 10, 1, 2),
> > + F(1000000, P_XO, 4, 5, 24),
>
> Does Qualcomm have information on these rates? Have they been tested?
> And did you measure these frequencies? The math checks out, but I wonder
> if the hardware can actually do it.
>
>
> No info from QCOM, I just tested this on a Dragonboard-410C/APQ8016 and
> measured SPI clk with a Logic Analyzer.
> Frequencies match expected values.
>
Ok. Taniya, can you help here and add a Reviewed-by?
