Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
drivers/spi/atmel_spi.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index ef57867..55032be 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -29,6 +29,7 @@
#include <clock.h>
#include <xfuncs.h>
#include <gpio.h>
+#include <of_gpio.h>
#include <io.h>
#include <spi/spi.h>
#include <mach/io.h>
@@ -400,10 +401,11 @@ static int atmel_spi_probe(struct device_d *dev)
int ret = 0;
int i;
struct spi_master *master;
+ struct device_node *node = dev->device_node;
struct atmel_spi *as;
struct at91_spi_platform_data *pdata = dev->platform_data;
- if (!pdata) {
+ if (!IS_ENABLED(CONFIG_OFDEVICE) && !pdata) {
dev_err(dev, "missing platform data\n");
return -EINVAL;
}
@@ -414,6 +416,23 @@ static int atmel_spi_probe(struct device_d *dev)
master->dev = dev;
master->bus_num = dev->id;
+ if (pdata) {
+ master->num_chipselect = pdata->num_chipselect;
+ as->cs_pins = pdata->chipselect;
+ } else {
+ master->num_chipselect = of_gpio_named_count(node, "cs-gpios");
+ as->cs_pins = xzalloc(sizeof(u32) * master->num_chipselect);
+
+ for (i = 0; i < master->num_chipselect; i++) {
+ as->cs_pins[i] = of_get_named_gpio(node, "cs-gpios", i);
+
+ if (!gpio_is_valid(as->cs_pins[i]))
+ break;
+ }
+
+ master->num_chipselect = i;
+ }
+
as->clk = clk_get(dev, "spi_clk");
if (IS_ERR(as->clk)) {
dev_err(dev, "no spi_clk\n");
@@ -423,8 +442,6 @@ static int atmel_spi_probe(struct device_d *dev)
master->setup = atmel_spi_setup;
master->transfer = atmel_spi_transfer;
- master->num_chipselect = pdata->num_chipselect;
- as->cs_pins = pdata->chipselect;
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores))
return PTR_ERR(iores);
@@ -465,8 +482,14 @@ out_free:
return ret;
}
+static __maybe_unused const struct of_device_id atmel_spi_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-spi" },
+ { /* sentinel */ }
+};
+
static struct driver_d atmel_spi_driver = {
.name = "atmel_spi",
.probe = atmel_spi_probe,
+ .of_compatible = DRV_OF_COMPAT(atmel_spi_dt_ids),
};
device_platform_driver(atmel_spi_driver);
--
2.9.3
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