linux-kernel - [PATCHv2 4/5] wl1251: spi: add device tree support

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Message-Id: <1386289336-26704-5-git-send-email-sre@debian.org>
Date:	Fri,  6 Dec 2013 01:22:15 +0100
From:	Sebastian Reichel <sre@...ian.org>
To:	Sebastian Reichel <sre@...g0.de>, Luciano Coelho <luca@...lho.fi>,
	Tony Lindgren <tony@...mide.com>,
	"John W. Linville" <linville@...driver.com>
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>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	linux-omap@...r.kernel.org, netdev@...r.kernel.org,
	Sebastian Reichel <sre@...ian.org>
Subject: [PATCHv2 4/5] wl1251: spi: add device tree support

Add device tree support for the spi variant of wl1251.

Signed-off-by: Sebastian Reichel <sre@...ian.org>
---
 drivers/net/wireless/ti/wl1251/spi.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ti/wl1251/spi.c b/drivers/net/wireless/ti/wl1251/spi.c
index 0a8aacc..b06d36d 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 = dev_get_platdata(&spi->dev);
+	struct device_node *np = spi->dev.of_node;
 	struct ieee80211_hw *hw;
 	struct wl1251 *wl;
 	int ret;
 
-	pdata = dev_get_platdata(&spi->dev);
-	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,wl1251-has-eeprom");
+		wl->power_gpio = of_get_named_gpio(np, "ti,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);
-- 
1.8.4.3

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