From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754440AbZHKMnq (ORCPT ); Tue, 11 Aug 2009 08:43:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754303AbZHKMnF (ORCPT ); Tue, 11 Aug 2009 08:43:05 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:37486 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754191AbZHKMlr (ORCPT ); Tue, 11 Aug 2009 08:41:47 -0400 From: Sascha Hauer To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.arm.linux.org.uk, Sascha Hauer , Luotao Fu , Hans de Goede , Andrew Morton , Eric Piel , lm-sensors@lm-sensors.org Subject: [PATCH 3/5] [hwmon] add Freescale MC13783 adc driver Date: Tue, 11 Aug 2009 11:07:45 +0200 Message-Id: <1249981667-4366-4-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1249981667-4366-3-git-send-email-s.hauer@pengutronix.de> References: <1249981667-4366-1-git-send-email-s.hauer@pengutronix.de> <1249981667-4366-2-git-send-email-s.hauer@pengutronix.de> <1249981667-4366-3-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:215:17ff:fe12:23b0 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Luotao Fu This driver provides support for the ADC integrated into the Freescale MC13783 PMIC. Signed-off-by: Sascha Hauer Cc: Hans de Goede Cc: Andrew Morton Cc: Eric Piel Cc: lm-sensors@lm-sensors.org --- drivers/hwmon/Kconfig | 6 ++ drivers/hwmon/Makefile | 1 + drivers/hwmon/mc13783-adc.c | 181 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 188 insertions(+), 0 deletions(-) create mode 100644 drivers/hwmon/mc13783-adc.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 2d50166..a7e34fd 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1017,6 +1017,12 @@ config SENSORS_APPLESMC Say Y here if you have an applicable laptop and want to experience the awesome power of applesmc. +config SENSORS_MC13783_ADC + tristate "Freescale MC13783 ADC" + depends on MFD_MC13783 + help + Support for the ad converter on mc13783 pmic. + config HWMON_DEBUG_CHIP bool "Hardware Monitoring Chip debugging messages" default n diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index b793dce..9b4e131 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -89,6 +89,7 @@ obj-$(CONFIG_SENSORS_VT8231) += vt8231.o obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o +obj-$(CONFIG_SENSORS_MC13783_ADC) += mc13783-adc.o ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/hwmon/mc13783-adc.c b/drivers/hwmon/mc13783-adc.c new file mode 100644 index 0000000..885c009 --- /dev/null +++ b/drivers/hwmon/mc13783-adc.c @@ -0,0 +1,181 @@ +/* + * Driver for the Freescale Semiconductor MC13783 adc. + * + * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2009 Sascha Hauer, Pengutronix + * + * 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., 51 + * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MC13783_ADC_NAME "mc13783-adc" + +struct mc13783_adc_priv { + struct mc13783 *mc13783; + struct device *hwmon_dev; +}; + +static ssize_t mc13783_adc_show_name(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + return sprintf(buf, "mc13783_adc\n"); +} + +static ssize_t mc13783_adc_read(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mc13783_adc_priv *priv = platform_get_drvdata(pdev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + unsigned int channel = attr->index; + unsigned int res; + unsigned int sample[4]; + + mc13783_adc_do_conversion(priv->mc13783, MC13783_ADC_MODE_MULT_CHAN, + channel, sample); + + channel &= 0x7; + + res = (sample[channel % 4] >> (channel > 3 ? 14 : 2)) & 0x3ff; + + return sprintf(buf, "%u\n", res); +} + +static struct sensor_device_attribute mc13783_adc_ctl[] = { + SENSOR_ATTR(name, S_IRUGO, mc13783_adc_show_name, NULL, 0), + SENSOR_ATTR(in0_input, S_IRUGO, mc13783_adc_read, NULL, 0), + SENSOR_ATTR(in1_input, S_IRUGO, mc13783_adc_read, NULL, 1), + SENSOR_ATTR(in2_input, S_IRUGO, mc13783_adc_read, NULL, 2), + SENSOR_ATTR(in3_input, S_IRUGO, mc13783_adc_read, NULL, 3), + SENSOR_ATTR(in4_input, S_IRUGO, mc13783_adc_read, NULL, 4), + SENSOR_ATTR(in5_input, S_IRUGO, mc13783_adc_read, NULL, 5), + SENSOR_ATTR(in6_input, S_IRUGO, mc13783_adc_read, NULL, 6), + SENSOR_ATTR(in7_input, S_IRUGO, mc13783_adc_read, NULL, 7), + SENSOR_ATTR(in8_input, S_IRUGO, mc13783_adc_read, NULL, 8), + SENSOR_ATTR(in9_input, S_IRUGO, mc13783_adc_read, NULL, 9), + SENSOR_ATTR(in10_input, S_IRUGO, mc13783_adc_read, NULL, 10), + SENSOR_ATTR(in11_input, S_IRUGO, mc13783_adc_read, NULL, 11), + SENSOR_ATTR(in12_input, S_IRUGO, mc13783_adc_read, NULL, 12), + SENSOR_ATTR(in13_input, S_IRUGO, mc13783_adc_read, NULL, 13), + SENSOR_ATTR(in14_input, S_IRUGO, mc13783_adc_read, NULL, 14), + SENSOR_ATTR(in15_input, S_IRUGO, mc13783_adc_read, NULL, 15), +}; + +static int __init mc13783_adc_probe(struct platform_device *pdev) +{ + struct mc13783_adc_priv *priv; + int ret, i; + int entries; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->mc13783 = pdev->dev.platform_data; + + entries = ARRAY_SIZE(mc13783_adc_ctl); + + /* last four channels may be occupied by the touchscreen */ + if (priv->mc13783->flags & MC13783_USE_TOUCHSCREEN) + entries -= 4; + + for (i = 0; i < entries; i++) { + ret = device_create_file(&pdev->dev, + &mc13783_adc_ctl[i].dev_attr); + if (ret) { + dev_err(&pdev->dev, + "device_create_file failed with %d.\n", ret); + goto out_err; + } + } + + priv->hwmon_dev = hwmon_device_register(&pdev->dev); + if (IS_ERR(priv->hwmon_dev)) { + ret = PTR_ERR(priv->hwmon_dev); + dev_err(&pdev->dev, + "hwmon_device_register failed with %d.\n", ret); + goto out_err; + } + + platform_set_drvdata(pdev, priv); + + return 0; + +out_err: + for (i--; i >= 0; i--) + device_remove_file(&pdev->dev, &mc13783_adc_ctl[i].dev_attr); + + kfree(priv); + + return ret; +} + +static int __devexit mc13783_adc_remove(struct platform_device *pdev) +{ + struct mc13783_adc_priv *priv = platform_get_drvdata(pdev); + int entries; + int i; + + hwmon_device_unregister(&pdev->dev); + + entries = ARRAY_SIZE(mc13783_adc_ctl); + + if (priv->mc13783->flags & MC13783_USE_TOUCHSCREEN) + entries -= 4; + + for (i = 0; i < entries; i++) + device_remove_file(&pdev->dev, &mc13783_adc_ctl[i].dev_attr); + + kfree(priv); + + return 0; +} + +static struct platform_driver mc13783_adc_driver = { + .probe = mc13783_adc_probe, + .remove = __devexit_p(mc13783_adc_remove), + .driver = { + .owner = THIS_MODULE, + .name = MC13783_ADC_NAME, + }, +}; + +static int __init mc13783_adc_init(void) +{ + return platform_driver_register(&mc13783_adc_driver); +} + +static void __exit mc13783_adc_exit(void) +{ + platform_driver_unregister(&mc13783_adc_driver); +} + +module_init(mc13783_adc_init); +module_exit(mc13783_adc_exit); + +MODULE_DESCRIPTION("MC13783 input touchscreen driver"); +MODULE_AUTHOR("Luotao Fu, "); +MODULE_LICENSE("GPL"); -- 1.6.3.3