linux-kernel - [PATCHv2 3/5] wl1251: spi: add vio regulator support

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Date:	Sat, 15 Feb 2014 00:05:54 +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>,
	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 3/5] wl1251: spi: add vio regulator support

This patch adds support for requesting the regulator powering
the vio pin.

Signed-off-by: Sebastian Reichel <sre@...ian.org>
Reviewed-by: Pavel Machek <pavel@....cz>
---
 drivers/net/wireless/ti/wl1251/spi.c    | 19 +++++++++++++++++--
 drivers/net/wireless/ti/wl1251/wl1251.h |  2 ++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ti/wl1251/spi.c b/drivers/net/wireless/ti/wl1251/spi.c
index 6abcbc3..0a8aacc 100644
--- a/drivers/net/wireless/ti/wl1251/spi.c
+++ b/drivers/net/wireless/ti/wl1251/spi.c
@@ -27,6 +27,7 @@
 #include <linux/spi/spi.h>
 #include <linux/wl12xx.h>
 #include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
 
 #include "wl1251.h"
 #include "reg.h"
@@ -306,13 +307,26 @@ static int wl1251_spi_probe(struct spi_device *spi)
 
 	irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
 
-	ret = wl1251_init_ieee80211(wl);
+	wl->vio = devm_regulator_get(&spi->dev, "vio");
+	if (IS_ERR(wl->vio)) {
+		ret = PTR_ERR(wl->vio);
+		wl1251_error("vio regulator missing: %d", ret);
+		goto out_free;
+	}
+
+	ret = regulator_enable(wl->vio);
 	if (ret)
 		goto out_free;
 
+	ret = wl1251_init_ieee80211(wl);
+	if (ret)
+		goto disable_regulator;
+
 	return 0;
 
- out_free:
+disable_regulator:
+	regulator_disable(wl->vio);
+out_free:
 	ieee80211_free_hw(hw);
 
 	return ret;
@@ -324,6 +338,7 @@ static int wl1251_spi_remove(struct spi_device *spi)
 
 	free_irq(wl->irq, wl);
 	wl1251_free_hw(wl);
+	regulator_disable(wl->vio);
 
 	return 0;
 }
diff --git a/drivers/net/wireless/ti/wl1251/wl1251.h b/drivers/net/wireless/ti/wl1251/wl1251.h
index 389fe25..16dae52 100644
--- a/drivers/net/wireless/ti/wl1251/wl1251.h
+++ b/drivers/net/wireless/ti/wl1251/wl1251.h
@@ -280,6 +280,8 @@ struct wl1251 {
 	int irq;
 	bool use_eeprom;
 
+	struct regulator *vio;
+
 	spinlock_t wl_lock;
 
 	enum wl1251_state state;
-- 
1.8.5.3

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