[PATCH V3 03/10] interconnect: add device managed bulk API

From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: djakov@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
	festevam@gmail.com, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, abel.vesa@nxp.com,
	abailon@baylibre.com, l.stach@pengutronix.de,
	laurent.pinchart@ideasonboard.com, marex@denx.de,
	paul.elder@ideasonboard.com, Markus.Niebel@ew.tq-group.com,
	aford173@gmail.com, cw00.choi@samsung.com,
	kyungmin.park@samsung.com, myungjoo.ham@samsung.com
Cc: kernel@pengutronix.de, linux-pm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-imx@nxp.com,
	abelvesa@kernel.org, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH V3 03/10] interconnect: add device managed bulk API
Date: Sun,  3 Jul 2022 17:11:25 +0800	[thread overview]
Message-ID: <20220703091132.1412063-4-peng.fan@oss.nxp.com> (raw)
In-Reply-To: <20220703091132.1412063-1-peng.fan@oss.nxp.com>

From: Peng Fan <peng.fan@nxp.com>

Add device managed bulk API to simplify driver.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/interconnect/bulk.c  | 42 ++++++++++++++++++++++++++++++++++++
 include/linux/interconnect.h |  7 ++++++
 2 files changed, 49 insertions(+)

diff --git a/drivers/interconnect/bulk.c b/drivers/interconnect/bulk.c
index 448cc536aa79..8b1d8a412464 100644
--- a/drivers/interconnect/bulk.c
+++ b/drivers/interconnect/bulk.c
@@ -115,3 +115,45 @@ void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
 		icc_disable(paths[num_paths].path);
 }
 EXPORT_SYMBOL_GPL(icc_bulk_disable);
+
+struct icc_bulk_devres {
+	struct icc_bulk_data *paths;
+	int num_paths;
+};
+
+static void devm_icc_bulk_release(struct device *dev, void *res)
+{
+	struct icc_bulk_devres *devres = res;
+
+	icc_bulk_put(devres->num_paths, devres->paths);
+}
+
+/**
+ * devm_of_icc_bulk_get() - resource managed of_icc_bulk_get
+ * @dev: the device requesting the path
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the table with the paths we want to get
+ *
+ * Returns 0 on success or negative errno otherwise.
+ */
+int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
+{
+	struct icc_bulk_devres *devres;
+	int ret;
+
+	devres = devres_alloc(devm_icc_bulk_release, sizeof(*devres), GFP_KERNEL);
+	if (!devres)
+		return -ENOMEM;
+
+	ret = of_icc_bulk_get(dev, num_paths, paths);
+	if (!ret) {
+		devres->paths = paths;
+		devres->num_paths = num_paths;
+		devres_add(dev, devres);
+	} else {
+		devres_free(devres);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devm_of_icc_bulk_get);
diff --git a/include/linux/interconnect.h b/include/linux/interconnect.h
index f685777b875e..2b0e784ba771 100644
--- a/include/linux/interconnect.h
+++ b/include/linux/interconnect.h
@@ -44,6 +44,7 @@ struct icc_path *icc_get(struct device *dev, const int src_id,
 			 const int dst_id);
 struct icc_path *of_icc_get(struct device *dev, const char *name);
 struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
+int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths);
 struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
 void icc_put(struct icc_path *path);
 int icc_enable(struct icc_path *path);
@@ -116,6 +117,12 @@ static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_
 	return 0;
 }
 
+static inline int devm_of_icc_bulk_get(struct device *dev, int num_paths,
+				       struct icc_bulk_data *paths)
+{
+	return 0;
+}
+
 static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
 {
 }
-- 
2.25.1

