linux-kernel - [PATCH v3 1/9] phy: add phy_get_bus_width()/phy_set_bus

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Message-Id: <1385403367-18144-2-git-send-email-matt.porter@linaro.org>
Date:	Mon, 25 Nov 2013 13:15:59 -0500
From:	Matt Porter <matt.porter@...aro.org>
To:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Christian Daudt <bcm@...thebug.org>,
	Paul Zimmerman <paulz@...opsys.com>
Cc:	Tomasz Figa <t.figa@...sung.com>,
	Kamil Debski <k.debski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Linux USB List <linux-usb@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Devicetree List <devicetree@...r.kernel.org>,
	Linaro Patches <patches@...aro.org>
Subject: [PATCH v3 1/9] phy: add phy_get_bus_width()/phy_set_bus_width() calls

This adds a pair of APIs that allows the generic PHY subsystem to
provide information on the PHY bus width. The PHY provider driver may
use phy_set_bus_width() to set the bus width that the PHY supports.
The controller driver may then use phy_get_bus_width() to fetch the
PHY bus width in order to properly configure the controller.

Signed-off-by: Matt Porter <matt.porter@...aro.org>
---
 include/linux/phy/phy.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 6d72269..6ca6c61 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -46,6 +46,7 @@ struct phy_ops {
  * @mutex: mutex to protect phy_ops
  * @init_count: used to protect when the PHY is used by multiple consumers
  * @power_count: used to protect when the PHY is used by multiple consumers
+ * @bus_width: used to specify data width of the PHY bus
  */
 struct phy {
 	struct device		dev;
@@ -55,6 +56,7 @@ struct phy {
 	struct mutex		mutex;
 	int			init_count;
 	int			power_count;
+	int			bus_width;
 };
 
 /**
@@ -127,6 +129,14 @@ int phy_init(struct phy *phy);
 int phy_exit(struct phy *phy);
 int phy_power_on(struct phy *phy);
 int phy_power_off(struct phy *phy);
+static inline int phy_get_bus_width(struct phy *phy)
+{
+	return phy->bus_width;
+}
+static inline void phy_set_bus_width(struct phy *phy, int bus_width)
+{
+	phy->bus_width = bus_width;
+}
 struct phy *phy_get(struct device *dev, const char *string);
 struct phy *devm_phy_get(struct device *dev, const char *string);
 void phy_put(struct phy *phy);
@@ -199,6 +209,16 @@ static inline int phy_power_off(struct phy *phy)
 	return -ENOSYS;
 }
 
+static inline int phy_get_bus_width(struct phy *phy)
+{
+	return -ENOSYS;
+}
+
+static inline void phy_set_bus_width(struct phy *phy, bus_width)
+{
+	return;
+}
+
 static inline struct phy *phy_get(struct device *dev, const char *string)
 {
 	return ERR_PTR(-ENOSYS);
-- 
1.8.4

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