[PATCH v3 11/15] iio: adc: qcom-spmi-vadc: convert to device properties

From: "Nuno Sá" <nuno.sa@analog.com>
To: <openbmc@lists.ozlabs.org>, <linux-imx@nxp.com>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<linux-iio@vger.kernel.org>, <linux-mips@vger.kernel.org>,
	<linux-renesas-soc@vger.kernel.org>,
	<linux-mediatek@lists.infradead.org>,
	<chrome-platform@lists.linux.dev>,
	<linux-arm-kernel@lists.infradead.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	<linux-arm-msm@vger.kernel.org>
Cc: Gwendal Grignou <gwendal@chromium.org>,
	Jonathan Cameron <jic23@kernel.org>,
	Saravanan Sekar <sravanhome@gmail.com>,
	Tomer Maimon <tmaimon77@gmail.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Lorenzo Bianconi <lorenzo@kernel.org>,
	Fabio Estevam <festevam@gmail.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Olivier Moysan <olivier.moysan@foss.st.com>,
	Tali Perry <tali.perry1@gmail.com>,
	Thara Gopinath <thara.gopinath@linaro.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Benjamin Fair <benjaminfair@google.com>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Patrick Venture <venture@google.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabrice Gasnier <fabrice.gasnier@foss.st.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Benson Leung <bleung@chromium.org>, Nancy Yuen <yuenn@google.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Zhang Rui <rui.zhang@intel.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Christophe Branchereau <cbranchereau@gmail.com>,
	Cai Huoqing <cai.huoqing@linux.dev>,
	Avi Fishman <avifishman70@gmail.com>,
	Eugen Hristev <eugen.hristev@microchip.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Guenter Roeck <groeck@chromium.org>,
	Paul Cercueil <paul@crapouillou.net>,
	Claudiu Beznea <claudiu.beznea@microchip.com>,
	Andy Gross <agross@kernel.org>, Amit Kucheria <amitk@kernel.org>,
	Michael Hennerich <Michael.Hennerich@analog.com>,
	Haibo Chen <haibo.chen@nxp.com>,
	Jishnu Prakash <quic_jprakash@quicinc.com>
Subject: [PATCH v3 11/15] iio: adc: qcom-spmi-vadc: convert to device properties
Date: Fri, 15 Jul 2022 14:28:59 +0200	[thread overview]
Message-ID: <20220715122903.332535-12-nuno.sa@analog.com> (raw)
In-Reply-To: <20220715122903.332535-1-nuno.sa@analog.com>

Make the conversion to firmware agnostic device properties. As part of
the conversion the IIO inkern interface 'of_xlate()' is also converted to
'fwnode_xlate()'. The goal is to completely drop 'of_xlate' and hence OF
dependencies from IIO.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
 drivers/iio/adc/qcom-spmi-vadc.c | 44 ++++++++++++++++----------------
 1 file changed, 22 insertions(+), 22 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index 34202ba52469..bcff0f62b70e 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -13,8 +13,9 @@
 #include <linux/kernel.h>
 #include <linux/math64.h>
 #include <linux/module.h>
-#include <linux/of.h>
+#include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/log2.h>
@@ -481,8 +482,8 @@ static int vadc_read_raw(struct iio_dev *indio_dev,
 	return ret;
 }
 
-static int vadc_of_xlate(struct iio_dev *indio_dev,
-			 const struct of_phandle_args *iiospec)
+static int vadc_fwnode_xlate(struct iio_dev *indio_dev,
+			     const struct fwnode_reference_args *iiospec)
 {
 	struct vadc_priv *vadc = iio_priv(indio_dev);
 	unsigned int i;
@@ -496,7 +497,7 @@ static int vadc_of_xlate(struct iio_dev *indio_dev,
 
 static const struct iio_info vadc_info = {
 	.read_raw = vadc_read_raw,
-	.of_xlate = vadc_of_xlate,
+	.fwnode_xlate = vadc_fwnode_xlate,
 };
 
 struct vadc_channels {
@@ -647,15 +648,15 @@ static const struct vadc_channels vadc_chans[] = {
 	VADC_CHAN_NO_SCALE(LR_MUX3_BUF_PU1_PU2_XO_THERM, 0)
 };
 
-static int vadc_get_dt_channel_data(struct device *dev,
+static int vadc_get_fw_channel_data(struct device *dev,
 				    struct vadc_channel_prop *prop,
-				    struct device_node *node)
+				    struct fwnode_handle *fwnode)
 {
-	const char *name = node->name;
+	const char *name = fwnode_get_name(fwnode);
 	u32 chan, value, varr[2];
 	int ret;
 
-	ret = of_property_read_u32(node, "reg", &chan);
+	ret = fwnode_property_read_u32(fwnode, "reg", &chan);
 	if (ret) {
 		dev_err(dev, "invalid channel number %s\n", name);
 		return ret;
@@ -669,7 +670,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
 	/* the channel has DT description */
 	prop->channel = chan;
 
-	ret = of_property_read_u32(node, "qcom,decimation", &value);
+	ret = fwnode_property_read_u32(fwnode, "qcom,decimation", &value);
 	if (!ret) {
 		ret = qcom_vadc_decimation_from_dt(value);
 		if (ret < 0) {
@@ -682,7 +683,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
 		prop->decimation = VADC_DEF_DECIMATION;
 	}
 
-	ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
+	ret = fwnode_property_read_u32_array(fwnode, "qcom,pre-scaling", varr, 2);
 	if (!ret) {
 		ret = vadc_prescaling_from_dt(varr[0], varr[1]);
 		if (ret < 0) {
@@ -695,7 +696,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
 		prop->prescale = vadc_chans[prop->channel].prescale_index;
 	}
 
-	ret = of_property_read_u32(node, "qcom,hw-settle-time", &value);
+	ret = fwnode_property_read_u32(fwnode, "qcom,hw-settle-time", &value);
 	if (!ret) {
 		ret = vadc_hw_settle_time_from_dt(value);
 		if (ret < 0) {
@@ -708,7 +709,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
 		prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
 	}
 
-	ret = of_property_read_u32(node, "qcom,avg-samples", &value);
+	ret = fwnode_property_read_u32(fwnode, "qcom,avg-samples", &value);
 	if (!ret) {
 		ret = vadc_avg_samples_from_dt(value);
 		if (ret < 0) {
@@ -721,7 +722,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
 		prop->avg_samples = VADC_DEF_AVG_SAMPLES;
 	}
 
-	if (of_property_read_bool(node, "qcom,ratiometric"))
+	if (fwnode_property_read_bool(fwnode, "qcom,ratiometric"))
 		prop->calibration = VADC_CALIB_RATIOMETRIC;
 	else
 		prop->calibration = VADC_CALIB_ABSOLUTE;
@@ -731,16 +732,16 @@ static int vadc_get_dt_channel_data(struct device *dev,
 	return 0;
 }
 
-static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
+static int vadc_get_fw_data(struct vadc_priv *vadc)
 {
 	const struct vadc_channels *vadc_chan;
 	struct iio_chan_spec *iio_chan;
 	struct vadc_channel_prop prop;
-	struct device_node *child;
+	struct fwnode_handle *child;
 	unsigned int index = 0;
 	int ret;
 
-	vadc->nchannels = of_get_available_child_count(node);
+	vadc->nchannels = device_get_child_node_count(vadc->dev);
 	if (!vadc->nchannels)
 		return -EINVAL;
 
@@ -756,10 +757,10 @@ static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
 
 	iio_chan = vadc->iio_chans;
 
-	for_each_available_child_of_node(node, child) {
-		ret = vadc_get_dt_channel_data(vadc->dev, &prop, child);
+	device_for_each_child_node(vadc->dev, child) {
+		ret = vadc_get_fw_channel_data(vadc->dev, &prop, child);
 		if (ret) {
-			of_node_put(child);
+			fwnode_handle_put(child);
 			return ret;
 		}
 
@@ -848,7 +849,6 @@ static int vadc_check_revision(struct vadc_priv *vadc)
 
 static int vadc_probe(struct platform_device *pdev)
 {
-	struct device_node *node = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;
 	struct iio_dev *indio_dev;
 	struct vadc_priv *vadc;
@@ -860,7 +860,7 @@ static int vadc_probe(struct platform_device *pdev)
 	if (!regmap)
 		return -ENODEV;
 
-	ret = of_property_read_u32(node, "reg", &reg);
+	ret = device_property_read_u32(dev, "reg", &reg);
 	if (ret < 0)
 		return ret;
 
@@ -880,7 +880,7 @@ static int vadc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = vadc_get_dt_data(vadc, node);
+	ret = vadc_get_fw_data(vadc);
 	if (ret)
 		return ret;
 
-- 
2.37.1

