linux-kernel - [PATCH 07/10] soc: fsl: cpm1: qmc: Introduce functions to get a channel from a phandle list

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Date: Thu, 20 Jun 2024 10:42:54 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Herve Codina <herve.codina@...tlin.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Qiang Zhao <qiang.zhao@....com>,
	Shengjiu Wang <shengjiu.wang@...il.com>,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Fabio Estevam <festevam@...il.com>,
	Nicolin Chen <nicoleotsuka@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>
Cc: alsa-devel@...a-project.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH 07/10] soc: fsl: cpm1: qmc: Introduce functions to get a channel from a phandle list

qmc_chan_get_byphandle() and the resource managed version retrieve a
channel from a simple phandle.

Extend the API and introduce qmc_chan_get_byphandles_index() and the
resource managed version in order to retrieve a channel from a phandle
list using the provided index to identify the phandle in the list.

Also update qmc_chan_get_byphandle() and the resource managed version to
use qmc_chan_get_byphandles_index() and so avoid code duplication.

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 drivers/soc/fsl/qe/qmc.c | 19 +++++++++++--------
 include/soc/fsl/qe/qmc.h | 25 ++++++++++++++++++++++---
 2 files changed, 33 insertions(+), 11 deletions(-)

diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
index f498db9abe35..e23d60018400 100644
--- a/drivers/soc/fsl/qe/qmc.c
+++ b/drivers/soc/fsl/qe/qmc.c
@@ -1777,13 +1777,15 @@ static struct qmc_chan *qmc_chan_get_from_qmc(struct device_node *qmc_np, unsign
 	return qmc_chan;
 }
 
-struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name)
+struct qmc_chan *qmc_chan_get_byphandles_index(struct device_node *np,
+					       const char *phandles_name,
+					       int index)
 {
 	struct of_phandle_args out_args;
 	struct qmc_chan *qmc_chan;
 	int ret;
 
-	ret = of_parse_phandle_with_fixed_args(np, phandle_name, 1, 0,
+	ret = of_parse_phandle_with_fixed_args(np, phandles_name, 1, index,
 					       &out_args);
 	if (ret < 0)
 		return ERR_PTR(ret);
@@ -1797,7 +1799,7 @@ struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phan
 	of_node_put(out_args.np);
 	return qmc_chan;
 }
-EXPORT_SYMBOL(qmc_chan_get_byphandle);
+EXPORT_SYMBOL(qmc_chan_get_byphandles_index);
 
 struct qmc_chan *qmc_chan_get_bychild(struct device_node *np)
 {
@@ -1827,9 +1829,10 @@ static void devm_qmc_chan_release(struct device *dev, void *res)
 	qmc_chan_put(*qmc_chan);
 }
 
-struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev,
-					     struct device_node *np,
-					     const char *phandle_name)
+struct qmc_chan *devm_qmc_chan_get_byphandles_index(struct device *dev,
+						    struct device_node *np,
+						    const char *phandles_name,
+						    int index)
 {
 	struct qmc_chan *qmc_chan;
 	struct qmc_chan **dr;
@@ -1838,7 +1841,7 @@ struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev,
 	if (!dr)
 		return ERR_PTR(-ENOMEM);
 
-	qmc_chan = qmc_chan_get_byphandle(np, phandle_name);
+	qmc_chan = qmc_chan_get_byphandles_index(np, phandles_name, index);
 	if (!IS_ERR(qmc_chan)) {
 		*dr = qmc_chan;
 		devres_add(dev, dr);
@@ -1848,7 +1851,7 @@ struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev,
 
 	return qmc_chan;
 }
-EXPORT_SYMBOL(devm_qmc_chan_get_byphandle);
+EXPORT_SYMBOL(devm_qmc_chan_get_byphandles_index);
 
 struct qmc_chan *devm_qmc_chan_get_bychild(struct device *dev,
 					   struct device_node *np)
diff --git a/include/soc/fsl/qe/qmc.h b/include/soc/fsl/qe/qmc.h
index 2a333fc1ea81..0fa7205145ce 100644
--- a/include/soc/fsl/qe/qmc.h
+++ b/include/soc/fsl/qe/qmc.h
@@ -16,11 +16,30 @@ struct device_node;
 struct device;
 struct qmc_chan;
 
-struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name);
+struct qmc_chan *qmc_chan_get_byphandles_index(struct device_node *np,
+					       const char *phandles_name,
+					       int index);
+struct qmc_chan *devm_qmc_chan_get_byphandles_index(struct device *dev,
+						    struct device_node *np,
+						    const char *phandles_name,
+						    int index);
+
+static inline struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np,
+						      const char *phandle_name)
+{
+	return qmc_chan_get_byphandles_index(np, phandle_name, 0);
+}
+
+static inline struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev,
+							   struct device_node *np,
+							   const char *phandle_name)
+{
+	return devm_qmc_chan_get_byphandles_index(dev, np, phandle_name, 0);
+}
+
 struct qmc_chan *qmc_chan_get_bychild(struct device_node *np);
 void qmc_chan_put(struct qmc_chan *chan);
-struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev, struct device_node *np,
-					     const char *phandle_name);
+
 struct qmc_chan *devm_qmc_chan_get_bychild(struct device *dev, struct device_node *np);
 
 enum qmc_mode {
-- 
2.45.0