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spi/orion: add device tree binding 

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Andrew Lunn 2012-07-23 12:08:09 +02:00 committed by Mark Brown
parent 24ab327511
commit f814f9ac5a
2 changed files with 36 additions and 0 deletions
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19
Documentation/devicetree/bindings/spi/spi-orion.txt Normal file
View File

@ -0,0 +1,19 @@
Marvell Orion SPI device
Required properties:
- compatible : should be "marvell,orion-spi".
- reg : offset and length of the register set for the device
- cell-index : Which of multiple SPI controllers is this.
Optional properties:
- interrupts : Is currently not used.
Example:
spi@10600 {
compatible = "marvell,orion-spi";
#address-cells = <1>;
#size-cells = <0>;
cell-index = <0>;
reg = <0x10600 0x28>;
interrupts = <23>;
status = "disabled";
};

17
drivers/spi/spi-orion.c
View File

@ -17,6 +17,7 @@
#include <linux/io.h>
#include <linux/spi/spi.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <asm/unaligned.h>
@ -453,6 +454,8 @@ static int __init orion_spi_probe(struct platform_device *pdev)
struct orion_spi_info *spi_info;
unsigned long tclk_hz;
int status = 0;
const u32 *iprop;
int size;
spi_info = pdev->dev.platform_data;
@ -464,6 +467,12 @@ static int __init orion_spi_probe(struct platform_device *pdev)
if (pdev->id != -1)
master->bus_num = pdev->id;
if (pdev->dev.of_node) {
iprop = of_get_property(pdev->dev.of_node, "cell-index",
&size);
if (iprop && size == sizeof(*iprop))
master->bus_num = *iprop;
}
/* we support only mode 0, and no options */
master->mode_bits = 0;
@ -511,6 +520,7 @@ static int __init orion_spi_probe(struct platform_device *pdev)
if (orion_spi_reset(spi) < 0)
goto out_rel_mem;
master->dev.of_node = pdev->dev.of_node;
status = spi_register_master(master);
if (status < 0)
goto out_rel_mem;
@ -552,10 +562,17 @@ static int __exit orion_spi_remove(struct platform_device *pdev)
MODULE_ALIAS("platform:" DRIVER_NAME);
static const struct of_device_id orion_spi_of_match_table[] __devinitdata = {
{ .compatible = "marvell,orion-spi", },
{}
};
MODULE_DEVICE_TABLE(of, orion_spi_of_match_table);
static struct platform_driver orion_spi_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(orion_spi_of_match_table),
},
.remove = __exit_p(orion_spi_remove),
};