drivers/misc: add driver for Texas Instruments DAC7512 (4d00928c) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/misc/Kconfig

+10 −0

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		@@ -270,6 +270,16 @@ config DS1682
		This driver can also be built as a module. If so, the module
		will be called ds1682.

		config TI_DAC7512
		tristate "Texas Instruments DAC7512"
		depends on SPI && SYSFS
		help
		If you say yes here you get support for the Texas Instruments
		DAC7512 16-bit digital-to-analog converter.

		This driver can also be built as a module. If so, the module
		will be calles ti_dac7512.

		source "drivers/misc/c2port/Kconfig"
		source "drivers/misc/eeprom/Kconfig"
		source "drivers/misc/cb710/Kconfig"

drivers/misc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ obj-$(CONFIG_HP_ILO) += hpilo.o
		obj-$(CONFIG_ISL29003) += isl29003.o
		obj-$(CONFIG_EP93XX_PWM) += ep93xx_pwm.o
		obj-$(CONFIG_DS1682) += ds1682.o
		obj-$(CONFIG_TI_DAC7512) += ti_dac7512.o
		obj-$(CONFIG_C2PORT) += c2port/
		obj-$(CONFIG_IWMC3200TOP) += iwmc3200top/
		obj-y += eeprom/

drivers/misc/ti_dac7512.c

0 → 100644

+101 −0

Original line number	Diff line number	Diff line
		/*
		* dac7512.c - Linux kernel module for
		* Texas Instruments DAC7512
		*
		* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		*/

		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/spi/spi.h>

		#define DAC7512_DRV_NAME "dac7512"
		#define DRIVER_VERSION "1.0"

		static ssize_t dac7512_store_val(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t count)
		{
		struct spi_device *spi = to_spi_device(dev);
		unsigned char tmp[2];
		unsigned long val;

		if (strict_strtoul(buf, 10, &val) < 0)
		return -EINVAL;

		tmp[0] = val >> 8;
		tmp[1] = val & 0xff;
		spi_write(spi, tmp, sizeof(tmp));
		return count;
		}

		static DEVICE_ATTR(value, S_IWUSR, NULL, dac7512_store_val);

		static struct attribute *dac7512_attributes[] = {
		&dev_attr_value.attr,
		NULL
		};

		static const struct attribute_group dac7512_attr_group = {
		.attrs = dac7512_attributes,
		};

		static int __devinit dac7512_probe(struct spi_device *spi)
		{
		int ret;

		spi->bits_per_word = 8;
		spi->mode = SPI_MODE_0;
		ret = spi_setup(spi);
		if (ret < 0)
		return ret;

		return sysfs_create_group(&spi->dev.kobj, &dac7512_attr_group);
		}

		static int __devexit dac7512_remove(struct spi_device *spi)
		{
		sysfs_remove_group(&spi->dev.kobj, &dac7512_attr_group);
		return 0;
		}

		static struct spi_driver dac7512_driver = {
		.driver = {
		.name = DAC7512_DRV_NAME,
		.owner = THIS_MODULE,
		},
		.probe = dac7512_probe,
		.remove = __devexit_p(dac7512_remove),
		};

		static int __init dac7512_init(void)
		{
		return spi_register_driver(&dac7512_driver);
		}

		static void __exit dac7512_exit(void)
		{
		spi_unregister_driver(&dac7512_driver);
		}

		MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
		MODULE_DESCRIPTION("DAC7512 16-bit DAC");
		MODULE_LICENSE("GPL v2");
		MODULE_VERSION(DRIVER_VERSION);

		module_init(dac7512_init);
		module_exit(dac7512_exit);