Hi Sergei,
> > Add a driver for Renesas R-Car Gen3 RPC-IF SPI controller.
> >
> > Signed-off-by: Mason Yang <masonccyang@xxxxxxxxxxx>
> > Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
> [...]
> > diff --git a/drivers/spi/spi-renesas-rpc.c
b/drivers/spi/spi-renesas-rpc.c
> > new file mode 100644
> > index 0000000..648d14e
> > --- /dev/null
> > +++ b/drivers/spi/spi-renesas-rpc.c
> > @@ -0,0 +1,754 @@
> [...]
> > +static void rpc_spi_hw_init(struct rpc_spi *rpc)
> > +{
> > + //
> > + // NOTE: The 0x260 are undocumented bits, but they must be set.
> > + // RPC_PHYCNT_STRTIM is strobe timing adjustment bit,
> > + // 0x0 : the delay is biggest,
> > + // 0x1 : the delay is 2nd biggest,
> > + // On H3 ES1.x, the value should be 0, while on others,
> > + // the value should be 6.
> > + //
> > + regmap_write(rpc->regmap, RPC_PHYCNT, RPC_PHYCNT_CAL |
> > + RPC_PHYCNT_STRTIM(6) | 0x260);
> > +
> > + //
> > + // NOTE: The 0x1511144 are undocumented bits, but they must be set
> > + // for RPC_PHYOFFSET1.
> > + // The 0x31 are undocumented bits, but they must be set
> > + // for RPC_PHYOFFSET2.
> > + //
> > + regmap_write(rpc->regmap, RPC_PHYOFFSET1, RPC_PHYOFFSET1_DDRTMG(3)
|
> > + 0x1511144);
> > + regmap_write(rpc->regmap, RPC_PHYOFFSET2, 0x31 |
> > + RPC_PHYOFFSET2_OCTTMG(4));
> > + regmap_write(rpc->regmap, RPC_SSLDR, RPC_SSLDR_SPNDL(7) |
> > + RPC_SSLDR_SLNDL(7) | RPC_SSLDR_SCKDL(7));
> > + regmap_write(rpc->regmap, RPC_CMNCR, RPC_CMNCR_MD | RPC_CMNCR_SFDE
|
> > + RPC_CMNCR_MOIIO_HIZ | RPC_CMNCR_IOFV_HIZ |
> > + RPC_CMNCR_BSZ(0));
> > +}
> [...]
> > +static int rpc_spi_io_xfer(struct rpc_spi *rpc,
> > + const void *tx_buf, void *rx_buf)
> > +{
> [...]
> > +err_out:
> > + return reset_control_reset(rpc->rstc);
>
> Don't toy need to call rpc_spi_hw_init(( here? The reset would spoil
> the PHY/etc register setup otherwise...
ummm, will fix to
-------------------------------------->
ret = reset_control_reset(rpc->rstc);
rpc_spi_hw_init(rpc);
return ret;
--------------------------------------<
thanks for your review.
>
> [...]
>
> MBR, Sergei
best regards,
Mason
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