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Date: Sun, 27 Oct 2013 17:14:29 +0100
From: Sebastian Reichel <sre@...ian.org>
To: Sebastian Reichel <sre@...g0.de>, Luciano Coelho <luca@...lho.fi>
Cc: Rob Herring <rob.herring@...xeda.com>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Stephen Warren <swarren@...dotorg.org>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Rob Landley <rob@...dley.net>,
Tony Lindgren <tony@...mide.com>,
Russell King <linux@....linux.org.uk>,
"John W. Linville" <linville@...driver.com>,
Felipe Balbi <balbi@...com>,
Sachin Kamat <sachin.kamat@...aro.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Bill Pemberton <wfp5p@...ginia.edu>,
devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
Sebastian Reichel <sre@...ian.org>
Subject: [PATCH 4/4] wl1251: spi: add device tree support
Add device tree support for the spi variant of wl1251
and document the binding.
Signed-off-by: Sebastian Reichel <sre@...ian.org>
---
.../devicetree/bindings/net/wireless/ti,wl1251.txt | 36 ++++++++++++++++++++++
drivers/net/wireless/ti/wl1251/spi.c | 23 ++++++++++----
2 files changed, 53 insertions(+), 6 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
diff --git a/Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt b/Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
new file mode 100644
index 0000000..5f8a154
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
@@ -0,0 +1,36 @@
+* Texas Instruments wl1251 controller
+
+The wl1251 chip can be connected via SPI or via SDIO. The linux
+kernel currently only supports device tree for the SPI variant.
+
+Required properties:
+- compatible : Should be "ti,wl1251"
+- interrupts : Should contain interrupt line
+- interrupt-parent : Should be the phandle for the interrupt
+ controller that services interrupts for this device
+- vio-supply : phandle to regulator providing VIO
+- power-gpio : GPIO connected to chip's PMEN pin
+- For additional required properties on SPI, please consult
+ Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Optional properties:
+- ti,use-eeprom : If found, configuration will be loaded from eeprom.
+
+Examples:
+
+&spi1 {
+ wl1251_spi@0 {
+ compatible = "ti,wl1251";
+
+ reg = <0>;
+ spi-max-frequency = <48000000>;
+ spi-cpol;
+ spi-cpha;
+
+ interrupt-parent = <&gpio2>;
+ interrupts = <10 IRQ_TYPE_NONE>; /* gpio line 42 */
+
+ vio-supply = <&vio>;
+ power-gpio = <&gpio3 23 GPIO_ACTIVE_HIGH>; /* 87 */
+ };
+};
diff --git a/drivers/net/wireless/ti/wl1251/spi.c b/drivers/net/wireless/ti/wl1251/spi.c
index efea57a..ee6ce4c 100644
--- a/drivers/net/wireless/ti/wl1251/spi.c
+++ b/drivers/net/wireless/ti/wl1251/spi.c
@@ -27,6 +27,8 @@
#include <linux/spi/spi.h>
#include <linux/wl12xx.h>
#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#include "wl1251.h"
@@ -240,13 +242,13 @@ static const struct wl1251_if_operations wl1251_spi_ops = {
static int wl1251_spi_probe(struct spi_device *spi)
{
- struct wl1251_platform_data *pdata;
+ struct wl1251_platform_data *pdata = spi->dev.platform_data;
+ struct device_node *np = spi->dev.of_node;
struct ieee80211_hw *hw;
struct wl1251 *wl;
int ret;
- pdata = spi->dev.platform_data;
- if (!pdata) {
+ if (!np && !pdata) {
wl1251_error("no platform data");
return -ENODEV;
}
@@ -273,7 +275,18 @@ static int wl1251_spi_probe(struct spi_device *spi)
goto out_free;
}
- wl->power_gpio = pdata->power_gpio;
+ if (np) {
+ wl->use_eeprom = of_property_read_bool(np, "ti,use-eeprom");
+ wl->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
+ } else if (pdata) {
+ wl->power_gpio = pdata->power_gpio;
+ wl->use_eeprom = pdata->use_eeprom;
+ }
+
+ if (wl->power_gpio == -EPROBE_DEFER) {
+ ret = -EPROBE_DEFER;
+ goto out_free;
+ }
if (gpio_is_valid(wl->power_gpio)) {
ret = devm_gpio_request_one(&spi->dev, wl->power_gpio,
@@ -295,8 +308,6 @@ static int wl1251_spi_probe(struct spi_device *spi)
goto out_free;
}
- wl->use_eeprom = pdata->use_eeprom;
-
irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
ret = devm_request_irq(&spi->dev, wl->irq, wl1251_irq, 0,
DRIVER_NAME, wl);
--
1.8.4.rc3
--
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