spi: davinci: Add platdata support

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>

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

include/dm/platform_data/spi_davinci.h

@@ -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 */