RE: [PATCH 2/7] clk: imx8: Add SCU and LPCG clocks for I2C in CM40 SS

[Joakim Zhang]

> -----Original Message-----
> From: Rob Herring <robh@xxxxxxxxxx>
> Sent: 2020年2月26日 1:58
> To: Joakim Zhang <qiangqing.zhang@xxxxxxx>
> Cc: mturquette@xxxxxxxxxxxx; sboyd@xxxxxxxxxx; mark.rutland@xxxxxxx;
> shawnguo@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; kernel@xxxxxxxxxxxxxx;
> festevam@xxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>; Anson Huang
> <anson.huang@xxxxxxx>; Leonard Crestez <leonard.crestez@xxxxxxx>;
> Daniel Baluta <daniel.baluta@xxxxxxx>; Aisheng Dong
> <aisheng.dong@xxxxxxx>; Peng Fan <peng.fan@xxxxxxx>; Andy Duan
> <fugang.duan@xxxxxxx>; linux-clk@xxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH 2/7] clk: imx8: Add SCU and LPCG clocks for I2C in CM40 SS
> 
> On Mon, Feb 17, 2020 at 11:19:16AM +0800, Joakim Zhang wrote:
> > Add SCU and LPCG clocks for I2C in CM40 SS.
> >
> > Signed-off-by: Joakim Zhang <qiangqing.zhang@xxxxxxx>
> > ---
> >  include/dt-bindings/clock/imx8-clock.h | 13 ++++++++++++-
> >  1 file changed, 12 insertions(+), 1 deletion(-)
> >
> > diff --git a/include/dt-bindings/clock/imx8-clock.h
> b/include/dt-bindings/clock/imx8-clock.h
> > index 673a8c662340..84a442be700f 100644
> > --- a/include/dt-bindings/clock/imx8-clock.h
> > +++ b/include/dt-bindings/clock/imx8-clock.h
> > @@ -131,7 +131,12 @@
> >  #define IMX_ADMA_PWM_CLK				188
> >  #define IMX_ADMA_LCD_CLK				189
> >
> > -#define IMX_SCU_CLK_END					190
> > +/* CM40 SS */
> > +#define IMX_CM40_IPG_CLK				200
> > +#define IMX_CM40_I2C_CLK				205
> > +
> > +#define IMX_SCU_CLK_END					220
> 
> Why are you skipping numbers?
Hi Rob,

I found that there is a gap in SCU clock between subsystem, some numbers could be reserved for devices which may be added into this subsystem in the future. 

Best Regards,
Joakim Zhang
> > +
> >
> >  /* LPCG clocks */
> >
> > @@ -290,4 +295,10 @@
> >
> >  #define IMX_ADMA_LPCG_CLK_END				45
> >
> > +/* CM40 SS LPCG */
> > +#define IMX_CM40_LPCG_I2C_IPG_CLK			0
> > +#define IMX_CM40_LPCG_I2C_CLK				1
> > +
> > +#define IMX_CM40_LPCG_CLK_END				2
> > +
> >  #endif /* __DT_BINDINGS_CLOCK_IMX_H */
> > --
> > 2.17.1
> >