From: Aswath Govindraju <a-govindraju@ti.com>
To: unlisted-recipients:; (no To-header on input)
Cc: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-phy@lists.infradead.org>,
Chandrasekar Ramakrishnan <rcsekar@samsung.com>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Kishon Vijay Abraham I <kishon@ti.com>,
Vinod Koul <vkoul@kernel.org>, <linux-can@vger.kernel.org>,
<netdev@vger.kernel.org>, Vignesh Raghavendra <vigneshr@ti.com>,
Lokesh Vutla <lokeshvutla@ti.com>,
Grygorii Strashko <grygorii.strashko@ti.com>,
Aswath Govindraju <a-govindraju@ti.com>
Subject: [PATCH v2 2/6] phy: Add API for devm_of_phy_optional_get_by_index
Date: Wed, 14 Apr 2021 19:35:17 +0530 [thread overview]
Message-ID: <20210414140521.11463-3-a-govindraju@ti.com> (raw)
In-Reply-To: <20210414140521.11463-1-a-govindraju@ti.com>
Add API for devm_of_phy_optional_get_by_index, to obtain a reference to an
optional phy by index.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
---
drivers/phy/phy-core.c | 26 ++++++++++++++++++++++++++
include/linux/phy/phy.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index ccb575b13777..bf06d4e0ede2 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -839,6 +839,32 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
}
EXPORT_SYMBOL_GPL(devm_of_phy_get);
+/**
+ * devm_of_phy_optional_get_by_index() - lookup and obtain a reference to an optional phy by index.
+ * @dev: device that requests this phy
+ * @np: node containing the phy
+ * @index: index of the phy
+ *
+ * Gets the phy using _of_phy_get(), then gets a refcount to it,
+ * and associates a device with it using devres. On driver detach,
+ * release function is invoked on the devres data, then,
+ * devres data is freed. This differs to devm_of_phy_get_by_index() in
+ * that if the phy does not exist, it is not considered an error and
+ * -ENODEV will not be returned. Instead the NULL phy is returned,
+ * which can be passed to all other phy consumer calls.
+ */
+struct phy *devm_of_phy_optional_get_by_index(struct device *dev, struct device_node *np,
+ int index)
+{
+ struct phy *phy = devm_of_phy_get_by_index(dev, np, index);
+
+ if (PTR_ERR(phy) == -ENODEV)
+ phy = NULL;
+
+ return phy;
+}
+EXPORT_SYMBOL_GPL(devm_of_phy_optional_get_by_index);
+
/**
* devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
* @dev: device that requests this phy
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index f3286f4cd306..c5f32b4fadd6 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -253,6 +253,8 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
const char *con_id);
struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
int index);
+struct phy *devm_of_phy_optional_get_by_index(struct device *dev, struct device_node *np,
+ int index);
void of_phy_put(struct phy *phy);
void phy_put(struct device *dev, struct phy *phy);
void devm_phy_put(struct device *dev, struct phy *phy);
--
2.17.1
next prev parent reply other threads:[~2021-04-14 14:06 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 14:05 [PATCH v2 0/6] CAN TRANSCEIVER: Add support for CAN transceivers Aswath Govindraju
2021-04-14 14:05 ` [PATCH v2 1/6] phy: core: Reword the comment specifying the units of max_link_rate to be Mbps Aswath Govindraju
2021-04-14 14:05 ` Aswath Govindraju [this message]
2021-04-14 14:05 ` [PATCH v2 3/6] dt-bindings: phy: Add binding for TI TCAN104x CAN transceivers Aswath Govindraju
2021-04-14 15:33 ` Marc Kleine-Budde
2021-04-15 6:27 ` Aswath Govindraju
2021-04-15 7:38 ` Marc Kleine-Budde
2021-04-15 9:11 ` Aswath Govindraju
2021-04-15 9:15 ` Marc Kleine-Budde
2021-04-14 14:05 ` [PATCH v2 4/6] phy: phy-can-transceiver: Add support for generic CAN transceiver driver Aswath Govindraju
2021-04-14 15:39 ` Marc Kleine-Budde
2021-04-14 15:40 ` Marc Kleine-Budde
2021-04-15 7:44 ` kernel test robot
2021-04-15 9:12 ` kernel test robot
2021-04-14 14:05 ` [PATCH v2 5/6] dt-bindings: net: can: Document transceiver implementation as phy Aswath Govindraju
2021-04-14 14:05 ` [PATCH v2 6/6] can: m_can: Add support for transceiver " Aswath Govindraju
2021-04-14 15:15 ` Marc Kleine-Budde
2021-04-14 15:43 ` [PATCH v2 0/6] CAN TRANSCEIVER: Add support for CAN transceivers Marc Kleine-Budde
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