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spi: davinci: Add platdata support

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Davanci spi driver has DM support already, this patch
add support for platdata so-that SPL can use it for
low foot-print.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Jagan Teki 2018-09-03 23:00:23 +05:30
parent c8602061a7
commit ba3c22bf18
2 changed files with 48 additions and 24 deletions
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57
drivers/spi/davinci_spi.c
View file

@ -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
@ -529,28 +530,6 @@ static int davinci_spi_xfer(struct udevice *dev, unsigned int bitlen,
return __davinci_spi_xfer(ds, bitlen, dout, din, flags);
}
static int davinci_spi_probe(struct udevice *bus)
{
/* Nothing to do */
return 0;
}
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);
ds->regs = devfdt_map_physmem(bus, sizeof(struct davinci_spi_regs));
if (!ds->regs) {
printf("%s: could not map device address\n", __func__);
return -EINVAL;
}
ds->num_cs = fdtdec_get_int(blob, node, "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,
@ -559,20 +538,50 @@ static const struct dm_spi_ops davinci_spi_ops = {
.set_mode = davinci_spi_set_mode,
};
static int davinci_spi_probe(struct udevice *bus)
{
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_platdata *plat = bus->platdata;
fdt_addr_t addr;
addr = devfdt_get_addr(bus);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
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 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

15
include/dm/platform_data/spi_davinci.h Normal file
View file

@ -0,0 +1,15 @@
/*
* Copyright (C) 2018 Jagan Teki <jagan@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 */