rockchip: spi: Add support for of-platdata

Allow this driver to be used with of-platdata on rk3288.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/spi/rk_spi.c

@@ -12,6 +12,7 @@
 #include <common.h>
 #include <clk.h>
 #include <dm.h>
+#include <dt-structs.h>
 #include <errno.h>
 #include <spi.h>
 #include <linux/errno.h>
@@ -27,6 +28,9 @@ DECLARE_GLOBAL_DATA_PTR;
 #define DEBUG_RK_SPI	0
 
 struct rockchip_spi_platdata {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_rockchip_rk3288_spi of_plat;
+#endif
 	s32 frequency;		/* Default clock frequency, -1 for none */
 	fdt_addr_t base;
 	uint deactivate_delay_us;	/* Delay to wait after deactivate */
@@ -127,9 +131,29 @@ static void spi_cs_deactivate(struct udevice *dev, uint cs)
 		priv->last_transaction_us = timer_get_us();
 }
 
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+static int conv_of_platdata(struct udevice *dev)
+{
+	struct rockchip_spi_platdata *plat = dev->platdata;
+	struct dtd_rockchip_rk3288_spi *dtplat = &plat->of_plat;
+	struct rockchip_spi_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	plat->base = dtplat->reg[0];
+	plat->frequency = 20000000;
+	ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->clk);
+	if (ret < 0)
+		return ret;
+	dev->req_seq = 0;
+
+	return 0;
+}
+#endif
+
 static int rockchip_spi_ofdata_to_platdata(struct udevice *bus)
 {
-	struct rockchip_spi_platdata *plat = bus->platdata;
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct rockchip_spi_platdata *plat = dev_get_platdata(bus);
 	struct rockchip_spi_priv *priv = dev_get_priv(bus);
 	const void *blob = gd->fdt_blob;
 	int node = bus->of_offset;
@@ -153,6 +177,7 @@ static int rockchip_spi_ofdata_to_platdata(struct udevice *bus)
 	debug("%s: base=%x, max-frequency=%d, deactivate_delay=%d\n",
 	      __func__, (uint)plat->base, plat->frequency,
 	      plat->deactivate_delay_us);
+#endif
 
 	return 0;
 }
@@ -164,6 +189,11 @@ static int rockchip_spi_probe(struct udevice *bus)
 	int ret;
 
 	debug("%s: probe\n", __func__);
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	ret = conv_of_platdata(bus);
+	if (ret)
+		return ret;
+#endif
 	priv->regs = (struct rockchip_spi *)plat->base;
 
 	priv->last_transaction_us = timer_get_us();
@@ -369,7 +399,11 @@ static const struct udevice_id rockchip_spi_ids[] = {
 };
 
 U_BOOT_DRIVER(rockchip_spi) = {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	.name	= "rockchip_rk3288_spi",
+#else
 	.name	= "rockchip_spi",
+#endif
 	.id	= UCLASS_SPI,
 	.of_match = rockchip_spi_ids,
 	.ops	= &rockchip_spi_ops,