[PATCH] spi-orion: add device tree binding
Andrew Lunn
andrew at lunn.ch
Mon Jul 23 06:08:09 EDT 2012
>From 528a19e9eda968cc673331d566cbfe20962d3b32 Mon Sep 17 00:00:00 2001
From: Michael Walle <michael at walle.cc>
Date: Wed, 6 Jun 2012 19:16:28 +0200
Subject: [PATCHv3] spi-orion: add device tree binding
Signed-off-by: Michael Walle <michael at walle.cc>
Signed-off-by: Andrew Lunn <andrew at lunn.ch>
Acked-by: Jason Cooper <jason at lakedaemon.net>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth at googlemail.com>
---
v2: Add interrupts properties as optional. Not used at the moment.
Add cell-index, since some SoCs have multiple SPI busses.
v3: Rebased onto 3.5-rc7 without the refactor patch.
---
Documentation/devicetree/bindings/spi/spi-orion.txt | 19 +++++++++++++++++++
drivers/spi/spi-orion.c | 17 +++++++++++++++++
2 files changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/spi-orion.txt
diff --git a/Documentation/devicetree/bindings/spi/spi-orion.txt b/Documentation/devicetree/bindings/spi/spi-orion.txt
new file mode 100644
index 0000000..a3ff50f
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-orion.txt
@@ -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 at 10600 {
+ compatible = "marvell,orion-spi";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cell-index = <0>;
+ reg = <0x10600 0x28>;
+ interrupts = <23>;
+ status = "disabled";
+ };
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index dfd04e9..74312a8 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -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),
};
--
1.7.10.4
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