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Diffstat (limited to 'target/linux/xburst/patches-2.6.35/057-hwmon.patch')
-rw-r--r--target/linux/xburst/patches-2.6.35/057-hwmon.patch283
1 files changed, 283 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.35/057-hwmon.patch b/target/linux/xburst/patches-2.6.35/057-hwmon.patch
new file mode 100644
index 0000000..e17758d
--- /dev/null
+++ b/target/linux/xburst/patches-2.6.35/057-hwmon.patch
@@ -0,0 +1,283 @@
+From 548ab33dc0bd3c824e6002936ae0931158658a19 Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Sat, 19 Jun 2010 18:32:58 +0000
+Subject: [PATCH] HWMON: Add JZ4740 ADC driver
+
+Add support for reading the ADCIN pin of the ADC unit on JZ4740 SoCs.
+
+Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
+Cc: lm-sensors@lm-sensors.org
+Acked-by: Jean Delvare <khali@linux-fr.org>
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+Patchwork: https://patchwork.linux-mips.org/patch/1425/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ drivers/hwmon/Kconfig | 10 ++
+ drivers/hwmon/Makefile | 1 +
+ drivers/hwmon/jz4740-hwmon.c | 230 ++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 241 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/hwmon/jz4740-hwmon.c
+
+--- a/drivers/hwmon/Kconfig
++++ b/drivers/hwmon/Kconfig
+@@ -446,6 +446,16 @@ config SENSORS_IT87
+ This driver can also be built as a module. If so, the module
+ will be called it87.
+
++config SENSORS_JZ4740
++ tristate "Ingenic JZ4740 SoC ADC driver"
++ depends on MACH_JZ4740 && MFD_JZ4740_ADC
++ help
++ If you say yes here you get support for reading adc values from the ADCIN
++ pin on Ingenic JZ4740 SoC based boards.
++
++ This driver can also be build as a module. If so, the module will be
++ called jz4740-hwmon.
++
+ config SENSORS_LM63
+ tristate "National Semiconductor LM63 and LM64"
+ depends on I2C
+--- a/drivers/hwmon/Makefile
++++ b/drivers/hwmon/Makefile
+@@ -55,6 +55,7 @@ obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb
+ obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
+ obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
+ obj-$(CONFIG_SENSORS_IT87) += it87.o
++obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o
+ obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
+ obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o
+ obj-$(CONFIG_SENSORS_LIS3LV02D) += lis3lv02d.o hp_accel.o
+--- /dev/null
++++ b/drivers/hwmon/jz4740-hwmon.c
+@@ -0,0 +1,230 @@
++/*
++ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
++ * JZ4740 SoC HWMON driver
++ *
++ * 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.
++ *
++ * 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/err.h>
++#include <linux/interrupt.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/mutex.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++
++#include <linux/completion.h>
++#include <linux/mfd/core.h>
++
++#include <linux/hwmon.h>
++
++struct jz4740_hwmon {
++ struct resource *mem;
++ void __iomem *base;
++
++ int irq;
++
++ struct mfd_cell *cell;
++ struct device *hwmon;
++
++ struct completion read_completion;
++
++ struct mutex lock;
++};
++
++static ssize_t jz4740_hwmon_show_name(struct device *dev,
++ struct device_attribute *dev_attr, char *buf)
++{
++ return sprintf(buf, "jz4740\n");
++}
++
++static irqreturn_t jz4740_hwmon_irq(int irq, void *data)
++{
++ struct jz4740_hwmon *hwmon = data;
++
++ complete(&hwmon->read_completion);
++ return IRQ_HANDLED;
++}
++
++static ssize_t jz4740_hwmon_read_adcin(struct device *dev,
++ struct device_attribute *dev_attr, char *buf)
++{
++ struct jz4740_hwmon *hwmon = dev_get_drvdata(dev);
++ struct completion *completion = &hwmon->read_completion;
++ unsigned long t;
++ unsigned long val;
++ int ret;
++
++ mutex_lock(&hwmon->lock);
++
++ INIT_COMPLETION(*completion);
++
++ enable_irq(hwmon->irq);
++ hwmon->cell->enable(to_platform_device(dev));
++
++ t = wait_for_completion_interruptible_timeout(completion, HZ);
++
++ if (t > 0) {
++ val = readw(hwmon->base) & 0xfff;
++ val = (val * 3300) >> 12;
++ ret = sprintf(buf, "%lu\n", val);
++ } else {
++ ret = t ? t : -ETIMEDOUT;
++ }
++
++ hwmon->cell->disable(to_platform_device(dev));
++ disable_irq(hwmon->irq);
++
++ mutex_unlock(&hwmon->lock);
++
++ return ret;
++}
++
++static DEVICE_ATTR(name, S_IRUGO, jz4740_hwmon_show_name, NULL);
++static DEVICE_ATTR(in0_input, S_IRUGO, jz4740_hwmon_read_adcin, NULL);
++
++static struct attribute *jz4740_hwmon_attributes[] = {
++ &dev_attr_name.attr,
++ &dev_attr_in0_input.attr,
++ NULL
++};
++
++static const struct attribute_group jz4740_hwmon_attr_group = {
++ .attrs = jz4740_hwmon_attributes,
++};
++
++static int __devinit jz4740_hwmon_probe(struct platform_device *pdev)
++{
++ int ret;
++ struct jz4740_hwmon *hwmon;
++
++ hwmon = kmalloc(sizeof(*hwmon), GFP_KERNEL);
++ if (!hwmon) {
++ dev_err(&pdev->dev, "Failed to allocate driver structure\n");
++ return -ENOMEM;
++ }
++
++ hwmon->cell = pdev->dev.platform_data;
++
++ hwmon->irq = platform_get_irq(pdev, 0);
++ if (hwmon->irq < 0) {
++ ret = hwmon->irq;
++ dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret);
++ goto err_free;
++ }
++
++ hwmon->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!hwmon->mem) {
++ ret = -ENOENT;
++ dev_err(&pdev->dev, "Failed to get platform mmio resource\n");
++ goto err_free;
++ }
++
++ hwmon->mem = request_mem_region(hwmon->mem->start,
++ resource_size(hwmon->mem), pdev->name);
++ if (!hwmon->mem) {
++ ret = -EBUSY;
++ dev_err(&pdev->dev, "Failed to request mmio memory region\n");
++ goto err_free;
++ }
++
++ hwmon->base = ioremap_nocache(hwmon->mem->start,
++ resource_size(hwmon->mem));
++ if (!hwmon->base) {
++ ret = -EBUSY;
++ dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
++ goto err_release_mem_region;
++ }
++
++ init_completion(&hwmon->read_completion);
++ mutex_init(&hwmon->lock);
++
++ platform_set_drvdata(pdev, hwmon);
++
++ ret = request_irq(hwmon->irq, jz4740_hwmon_irq, 0, pdev->name, hwmon);
++ if (ret) {
++ dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
++ goto err_iounmap;
++ }
++ disable_irq(hwmon->irq);
++
++ ret = sysfs_create_group(&pdev->dev.kobj, &jz4740_hwmon_attr_group);
++ if (ret) {
++ dev_err(&pdev->dev, "Failed to create sysfs group: %d\n", ret);
++ goto err_free_irq;
++ }
++
++ hwmon->hwmon = hwmon_device_register(&pdev->dev);
++ if (IS_ERR(hwmon->hwmon)) {
++ ret = PTR_ERR(hwmon->hwmon);
++ goto err_remove_file;
++ }
++
++ return 0;
++
++err_remove_file:
++ sysfs_remove_group(&pdev->dev.kobj, &jz4740_hwmon_attr_group);
++err_free_irq:
++ free_irq(hwmon->irq, hwmon);
++err_iounmap:
++ platform_set_drvdata(pdev, NULL);
++ iounmap(hwmon->base);
++err_release_mem_region:
++ release_mem_region(hwmon->mem->start, resource_size(hwmon->mem));
++err_free:
++ kfree(hwmon);
++
++ return ret;
++}
++
++static int __devexit jz4740_hwmon_remove(struct platform_device *pdev)
++{
++ struct jz4740_hwmon *hwmon = platform_get_drvdata(pdev);
++
++ hwmon_device_unregister(hwmon->hwmon);
++ sysfs_remove_group(&pdev->dev.kobj, &jz4740_hwmon_attr_group);
++
++ free_irq(hwmon->irq, hwmon);
++
++ iounmap(hwmon->base);
++ release_mem_region(hwmon->mem->start, resource_size(hwmon->mem));
++
++ platform_set_drvdata(pdev, NULL);
++ kfree(hwmon);
++
++ return 0;
++}
++
++struct platform_driver jz4740_hwmon_driver = {
++ .probe = jz4740_hwmon_probe,
++ .remove = __devexit_p(jz4740_hwmon_remove),
++ .driver = {
++ .name = "jz4740-hwmon",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init jz4740_hwmon_init(void)
++{
++ return platform_driver_register(&jz4740_hwmon_driver);
++}
++module_init(jz4740_hwmon_init);
++
++static void __exit jz4740_hwmon_exit(void)
++{
++ platform_driver_unregister(&jz4740_hwmon_driver);
++}
++module_exit(jz4740_hwmon_exit);
++
++MODULE_DESCRIPTION("JZ4740 SoC HWMON driver");
++MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("platform:jz4740-hwmon");