diff options
Diffstat (limited to 'drivers/iio/adc/ep93xx_adc.c')
| -rw-r--r-- | drivers/iio/adc/ep93xx_adc.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c index 5036c392cb20..a3e9c697e2cb 100644 --- a/drivers/iio/adc/ep93xx_adc.c +++ b/drivers/iio/adc/ep93xx_adc.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Driver for ADC module on the Cirrus Logic EP93xx series of SoCs * * Copyright (C) 2015 Alexander Sverdlin * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * The driver uses polling to get the conversion status. According to EP93xx * datasheets, reading ADCResult register starts the conversion, but user is also * responsible for ensuring that delay between adjacent conversion triggers is @@ -24,6 +21,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/platform_device.h> +#include <linux/of.h> /* * This code could benefit from real HR Timers, but jiffy granularity would @@ -159,21 +157,16 @@ static int ep93xx_adc_probe(struct platform_device *pdev) struct iio_dev *iiodev; struct ep93xx_adc_priv *priv; struct clk *pclk; - struct resource *res; iiodev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv)); if (!iiodev) return -ENOMEM; priv = iio_priv(iiodev); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - priv->base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(priv->base)) { - dev_err(&pdev->dev, "Cannot map memory resource\n"); + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) return PTR_ERR(priv->base); - } - iiodev->dev.parent = &pdev->dev; iiodev->name = dev_name(&pdev->dev); iiodev->modes = INDIO_DIRECT_MODE; iiodev->info = &ep93xx_adc_info; @@ -211,7 +204,7 @@ static int ep93xx_adc_probe(struct platform_device *pdev) */ } - ret = clk_enable(priv->clk); + ret = clk_prepare_enable(priv->clk); if (ret) { dev_err(&pdev->dev, "Cannot enable clock\n"); return ret; @@ -219,25 +212,30 @@ static int ep93xx_adc_probe(struct platform_device *pdev) ret = iio_device_register(iiodev); if (ret) - clk_disable(priv->clk); + clk_disable_unprepare(priv->clk); return ret; } -static int ep93xx_adc_remove(struct platform_device *pdev) +static void ep93xx_adc_remove(struct platform_device *pdev) { struct iio_dev *iiodev = platform_get_drvdata(pdev); struct ep93xx_adc_priv *priv = iio_priv(iiodev); iio_device_unregister(iiodev); - clk_disable(priv->clk); - - return 0; + clk_disable_unprepare(priv->clk); } +static const struct of_device_id ep93xx_adc_of_ids[] = { + { .compatible = "cirrus,ep9301-adc" }, + { } +}; +MODULE_DEVICE_TABLE(of, ep93xx_adc_of_ids); + static struct platform_driver ep93xx_adc_driver = { .driver = { .name = "ep93xx-adc", + .of_match_table = ep93xx_adc_of_ids, }, .probe = ep93xx_adc_probe, .remove = ep93xx_adc_remove, |