spi: rspi: Add DT support
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index d79a7ed..e56fcb5 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -31,6 +31,7 @@
#include <linux/clk.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
#include <linux/sh_dma.h>
#include <linux/spi/spi.h>
#include <linux/spi/rspi.h>
@@ -985,6 +986,56 @@
return 0;
}
+static const struct spi_ops rspi_ops = {
+ .set_config_register = rspi_set_config_register,
+ .transfer_one = rspi_transfer_one,
+};
+
+static const struct spi_ops rspi_rz_ops = {
+ .set_config_register = rspi_rz_set_config_register,
+ .transfer_one = rspi_rz_transfer_one,
+};
+
+static const struct spi_ops qspi_ops = {
+ .set_config_register = qspi_set_config_register,
+ .transfer_one = qspi_transfer_one,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id rspi_of_match[] = {
+ /* RSPI on legacy SH */
+ { .compatible = "renesas,rspi", .data = &rspi_ops },
+ /* RSPI on RZ/A1H */
+ { .compatible = "renesas,rspi-rz", .data = &rspi_rz_ops },
+ /* QSPI on R-Car Gen2 */
+ { .compatible = "renesas,qspi", .data = &qspi_ops },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, rspi_of_match);
+
+static int rspi_parse_dt(struct device *dev, struct spi_master *master)
+{
+ u32 num_cs;
+ int error;
+
+ /* Parse DT properties */
+ error = of_property_read_u32(dev->of_node, "num-cs", &num_cs);
+ if (error) {
+ dev_err(dev, "of_property_read_u32 num-cs failed %d\n", error);
+ return error;
+ }
+
+ master->num_chipselect = num_cs;
+ return 0;
+}
+#else
+static inline int rspi_parse_dt(struct device *dev, struct spi_master *master)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_OF */
+
static int rspi_request_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, const char *suffix,
void *dev_id)
@@ -1004,16 +1055,9 @@
struct spi_master *master;
struct rspi_data *rspi;
int ret;
- const struct rspi_plat_data *rspi_pd = dev_get_platdata(&pdev->dev);
+ const struct of_device_id *of_id;
+ const struct rspi_plat_data *rspi_pd;
const struct spi_ops *ops;
- const struct platform_device_id *id_entry = pdev->id_entry;
-
- ops = (struct spi_ops *)id_entry->driver_data;
- /* ops parameter check */
- if (!ops->set_config_register) {
- dev_err(&pdev->dev, "there is no set_config_register\n");
- return -ENODEV;
- }
master = spi_alloc_master(&pdev->dev, sizeof(struct rspi_data));
if (master == NULL) {
@@ -1021,6 +1065,28 @@
return -ENOMEM;
}
+ of_id = of_match_device(rspi_of_match, &pdev->dev);
+ if (of_id) {
+ ops = of_id->data;
+ ret = rspi_parse_dt(&pdev->dev, master);
+ if (ret)
+ goto error1;
+ } else {
+ ops = (struct spi_ops *)pdev->id_entry->driver_data;
+ rspi_pd = dev_get_platdata(&pdev->dev);
+ if (rspi_pd && rspi_pd->num_chipselect)
+ master->num_chipselect = rspi_pd->num_chipselect;
+ else
+ master->num_chipselect = 2; /* default */
+ };
+
+ /* ops parameter check */
+ if (!ops->set_config_register) {
+ dev_err(&pdev->dev, "there is no set_config_register\n");
+ ret = -ENODEV;
+ goto error1;
+ }
+
rspi = spi_master_get_devdata(master);
platform_set_drvdata(pdev, rspi);
rspi->ops = ops;
@@ -1048,11 +1114,6 @@
init_waitqueue_head(&rspi->wait);
- if (rspi_pd && rspi_pd->num_chipselect)
- master->num_chipselect = rspi_pd->num_chipselect;
- else
- master->num_chipselect = 2; /* default */
-
master->bus_num = pdev->id;
master->setup = rspi_setup;
master->transfer_one = ops->transfer_one;
@@ -1060,6 +1121,7 @@
master->prepare_message = rspi_prepare_message;
master->unprepare_message = rspi_unprepare_message;
master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_LOOP;
+ master->dev.of_node = pdev->dev.of_node;
ret = platform_get_irq_byname(pdev, "rx");
if (ret < 0) {
@@ -1122,21 +1184,6 @@
return ret;
}
-static struct spi_ops rspi_ops = {
- .set_config_register = rspi_set_config_register,
- .transfer_one = rspi_transfer_one,
-};
-
-static struct spi_ops rspi_rz_ops = {
- .set_config_register = rspi_rz_set_config_register,
- .transfer_one = rspi_rz_transfer_one,
-};
-
-static struct spi_ops qspi_ops = {
- .set_config_register = qspi_set_config_register,
- .transfer_one = qspi_transfer_one,
-};
-
static struct platform_device_id spi_driver_ids[] = {
{ "rspi", (kernel_ulong_t)&rspi_ops },
{ "rspi-rz", (kernel_ulong_t)&rspi_rz_ops },
@@ -1153,6 +1200,7 @@
.driver = {
.name = "renesas_spi",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(rspi_of_match),
},
};
module_platform_driver(rspi_driver);