[U-Boot] [PATCH 1/3] spi: davinci: Add platdata support

[Adam Ford]

On Mon, Sep 3, 2018 at 5:21 PM Adam Ford <aford173 at gmail.com> wrote:
>
> On Mon, Sep 3, 2018 at 12:30 PM Jagan Teki <jagan at amarulasolutions.com> wrote:
> >
> > Davanci spi driver has DM support already, this patch
> > add support for platdata so-that SPL can use it for
> > low foot-print.
> >
>
> In order for this to work, I had to apply a patch [1] that I submitted before.
> That patch disabled the manual initialization of the UART in da850_lowlevel.c
> to not conflict with the DM version of initialization.
>
> Assuming that [1] gets applied first then this, you can add me as
> 'tested-by' on
> both patches 1 of 3 and 2 of 3.  I don't have the hardware to test 3 of 3.
>
> [1] - https://patchwork.ozlabs.org/patch/957336/
>
> adam
>

I should have stated, that without the [1] patch, this does does not work.

adam
> > Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
> > ---
> >  drivers/spi/davinci_spi.c              | 47 +++++++++++++++-----------
> >  include/dm/platform_data/spi_davinci.h | 15 ++++++++
> >  2 files changed, 43 insertions(+), 19 deletions(-)
> >  create mode 100644 include/dm/platform_data/spi_davinci.h
> >
> > diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
> > index a822858323..07fa5e3b8a 100644
> > --- a/drivers/spi/davinci_spi.c
> > +++ b/drivers/spi/davinci_spi.c
> > @@ -14,6 +14,7 @@
> >  #include <asm/io.h>
> >  #include <asm/arch/hardware.h>
> >  #include <dm.h>
> > +#include <dm/platform_data/spi_davinci.h>
> >
> >  /* SPIGCR0 */
> >  #define SPIGCR0_SPIENA_MASK    0x1
> > @@ -529,50 +530,58 @@ static int davinci_spi_xfer(struct udevice *dev, unsigned int bitlen,
> >         return __davinci_spi_xfer(ds, bitlen, dout, din, flags);
> >  }
> >
> > +static const struct dm_spi_ops davinci_spi_ops = {
> > +       .claim_bus      = davinci_spi_claim_bus,
> > +       .release_bus    = davinci_spi_release_bus,
> > +       .xfer           = davinci_spi_xfer,
> > +       .set_speed      = davinci_spi_set_speed,
> > +       .set_mode       = davinci_spi_set_mode,
> > +};
> > +
> >  static int davinci_spi_probe(struct udevice *bus)
> >  {
> > -       /* Nothing to do */
> > +       struct davinci_spi_slave *ds = dev_get_priv(bus);
> > +       struct davinci_spi_platdata *plat = bus->platdata;
> > +       ds->regs = plat->regs;
> > +       ds->num_cs = plat->num_cs;
> > +
> >         return 0;
> >  }
> >
> > +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
> >  static int davinci_ofdata_to_platadata(struct udevice *bus)
> >  {
> > -       struct davinci_spi_slave *ds = dev_get_priv(bus);
> > -       const void *blob = gd->fdt_blob;
> > -       int node = dev_of_offset(bus);
> > +       struct davinci_spi_platdata *plat = bus->platdata;
> > +       fdt_addr_t addr;
> >
> > -       ds->regs = devfdt_map_physmem(bus, sizeof(struct davinci_spi_regs));
> > -       if (!ds->regs) {
> > -               printf("%s: could not map device address\n", __func__);
> > +       addr = devfdt_get_addr(bus);
> > +       if (addr == FDT_ADDR_T_NONE)
> >                 return -EINVAL;
> > -       }
> > -       ds->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
> > +
> > +       plat->regs = (struct davinci_spi_regs *)addr;
> > +       plat->num_cs = fdtdec_get_int(gd->fdt_blob, dev_of_offset(bus), "num-cs", 4);
> >
> >         return 0;
> >  }
> >
> > -static const struct dm_spi_ops davinci_spi_ops = {
> > -       .claim_bus      = davinci_spi_claim_bus,
> > -       .release_bus    = davinci_spi_release_bus,
> > -       .xfer           = davinci_spi_xfer,
> > -       .set_speed      = davinci_spi_set_speed,
> > -       .set_mode       = davinci_spi_set_mode,
> > -};
> > -
> >  static const struct udevice_id davinci_spi_ids[] = {
> >         { .compatible = "ti,keystone-spi" },
> >         { .compatible = "ti,dm6441-spi" },
> >         { .compatible = "ti,da830-spi" },
> >         { }
> >  };
> > +#endif
> >
> >  U_BOOT_DRIVER(davinci_spi) = {
> >         .name = "davinci_spi",
> >         .id = UCLASS_SPI,
> > +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
> >         .of_match = davinci_spi_ids,
> > -       .ops = &davinci_spi_ops,
> >         .ofdata_to_platdata = davinci_ofdata_to_platadata,
> > -       .priv_auto_alloc_size = sizeof(struct davinci_spi_slave),
> > +        .platdata_auto_alloc_size = sizeof(struct davinci_spi_platdata),
> > +#endif
> >         .probe = davinci_spi_probe,
> > +       .ops = &davinci_spi_ops,
> > +       .priv_auto_alloc_size = sizeof(struct davinci_spi_slave),
> >  };
> >  #endif
> > diff --git a/include/dm/platform_data/spi_davinci.h b/include/dm/platform_data/spi_davinci.h
> > new file mode 100644
> > index 0000000000..fbc62c262a
> > --- /dev/null
> > +++ b/include/dm/platform_data/spi_davinci.h
> > @@ -0,0 +1,15 @@
> > +/*
> > + * Copyright (C) 2018 Jagan Teki <jagan at amarulasolutions.com>
> > + *
> > + * SPDX-License-Identifier:    GPL-2.0+
> > + */
> > +
> > +#ifndef __spi_davinci_h
> > +#define __spi_davinci_h
> > +
> > +struct davinci_spi_platdata {
> > +       struct davinci_spi_regs *regs;
> > +       u8 num_cs;         /* total no. of CS available */
> > +};
> > +
> > +#endif /* __spi_davinci_h */
> > --
> > 2.18.0.321.gffc6fa0e3
> >