modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/drivers/iio/adc/exynos_adc.c
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@@ -1,23 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  exynos_adc.c - Support for ADC in EXYNOS SoCs
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  *
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  *  8 ~ 10 channel, 10/12-bit ADC
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  *
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  *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License as published by
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- *  the Free Software Foundation; either version 2 of the License, or
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- *  (at your option) any later version.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *  GNU General Public License for more details.
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- *
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- *  You should have received a copy of the GNU General Public License
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- *  along with this program; if not, write to the Free Software
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- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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9
 
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 #include <linux/module.h>
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@@ -151,6 +138,16 @@
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 	bool			read_ts;
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 	u32			ts_x;
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 	u32			ts_y;
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+
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+	/*
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+	 * Lock to protect from potential concurrent access to the
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+	 * completion callback during a manual conversion. For this driver
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+	 * a wait-callback is used to wait for the conversion result,
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+	 * so in the meantime no other read request (or conversion start)
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+	 * must be performed, otherwise it would interfere with the
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+	 * current conversion result.
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+	 */
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+	struct mutex		lock;
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 };
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 struct exynos_adc_data {
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@@ -462,9 +459,6 @@
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 {
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 	u32 con1, con2;
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461
 
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-	if (info->data->needs_adc_phy)
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-		regmap_write(info->pmu_map, info->data->phy_offset, 1);
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-
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 	con1 = ADC_V2_CON1_SOFT_RESET;
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 	writel(con1, ADC_V2_CON1(info->regs));
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464
 
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@@ -544,10 +538,21 @@
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 	unsigned long timeout;
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 	int ret;
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-	if (mask != IIO_CHAN_INFO_RAW)
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-		return -EINVAL;
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+	if (mask == IIO_CHAN_INFO_SCALE) {
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+		ret = regulator_get_voltage(info->vdd);
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+		if (ret < 0)
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+			return ret;
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-	mutex_lock(&indio_dev->mlock);
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+		/* Regulator voltage is in uV, but need mV */
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+		*val = ret / 1000;
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+		*val2 = info->data->mask;
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+
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+		return IIO_VAL_FRACTIONAL;
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+	} else if (mask != IIO_CHAN_INFO_RAW) {
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+		return -EINVAL;
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+	}
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+
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+	mutex_lock(&info->lock);
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 	reinit_completion(&info->completion);
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 	/* Select the channel to be used and Trigger conversion */
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@@ -567,7 +572,7 @@
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 		ret = IIO_VAL_INT;
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 	}
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-	mutex_unlock(&indio_dev->mlock);
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+	mutex_unlock(&info->lock);
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 	return ret;
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 }
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@@ -578,7 +583,7 @@
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 	unsigned long timeout;
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 	int ret;
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-	mutex_lock(&indio_dev->mlock);
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+	mutex_lock(&info->lock);
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 	info->read_ts = true;
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 	reinit_completion(&info->completion);
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@@ -603,7 +608,7 @@
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 	}
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 	info->read_ts = false;
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-	mutex_unlock(&indio_dev->mlock);
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+	mutex_unlock(&info->lock);
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 	return ret;
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 }
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@@ -664,7 +669,7 @@
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 		input_sync(info->input);
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 		usleep_range(1000, 1100);
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-	};
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+	}
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673
 
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 	writel(0, ADC_V1_CLRINTPNDNUP(info->regs));
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@@ -696,6 +701,7 @@
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 	.channel = _index,				\
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 	.address = _index,				\
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 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
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+	.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SCALE),	\
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 	.datasheet_name = _id,				\
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 }
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@@ -782,7 +788,6 @@
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 	struct device_node *np = pdev->dev.of_node;
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 	struct s3c2410_ts_mach_info *pdata = dev_get_platdata(&pdev->dev);
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 	struct iio_dev *indio_dev = NULL;
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-	struct resource	*mem;
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 	bool has_ts = false;
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 	int ret = -ENODEV;
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 	int irq;
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@@ -801,8 +806,7 @@
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 		return -EINVAL;
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 	}
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-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	info->regs = devm_ioremap_resource(&pdev->dev, mem);
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+	info->regs = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(info->regs))
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 		return PTR_ERR(info->regs);
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@@ -818,10 +822,8 @@
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 	}
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 	irq = platform_get_irq(pdev, 0);
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-	if (irq < 0) {
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-		dev_err(&pdev->dev, "no irq resource?\n");
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+	if (irq < 0)
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 		return irq;
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-	}
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 	info->irq = irq;
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 	irq = platform_get_irq(pdev, 1);
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@@ -852,11 +854,9 @@
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 	}
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 	info->vdd = devm_regulator_get(&pdev->dev, "vdd");
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-	if (IS_ERR(info->vdd)) {
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-		dev_err(&pdev->dev, "failed getting regulator, err = %ld\n",
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-							PTR_ERR(info->vdd));
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-		return PTR_ERR(info->vdd);
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-	}
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+	if (IS_ERR(info->vdd))
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+		return dev_err_probe(&pdev->dev, PTR_ERR(info->vdd),
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+				     "failed getting regulator");
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 	ret = regulator_enable(info->vdd);
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 	if (ret)
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@@ -873,13 +873,13 @@
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 	platform_set_drvdata(pdev, indio_dev);
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 	indio_dev->name = dev_name(&pdev->dev);
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-	indio_dev->dev.parent = &pdev->dev;
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-	indio_dev->dev.of_node = pdev->dev.of_node;
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 	indio_dev->info = &exynos_adc_iio_info;
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 	indio_dev->modes = INDIO_DIRECT_MODE;
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 	indio_dev->channels = exynos_adc_iio_channels;
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 	indio_dev->num_channels = info->data->num_channels;
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+	mutex_init(&info->lock);
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+
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 	ret = request_irq(info->irq, exynos_adc_isr,
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 					0, dev_name(&pdev->dev), info);
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 	if (ret < 0) {