[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/hwmon/jz4740-hwmon.c b/src/kernel/linux/v4.14/drivers/hwmon/jz4740-hwmon.c
new file mode 100644
index 0000000..2d40a2e
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/hwmon/jz4740-hwmon.c
@@ -0,0 +1,146 @@
+/*
+ * 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/io.h>
+
+#include <linux/completion.h>
+#include <linux/mfd/core.h>
+
+#include <linux/hwmon.h>
+
+struct jz4740_hwmon {
+ void __iomem *base;
+ int irq;
+ const struct mfd_cell *cell;
+ struct platform_device *pdev;
+ struct completion read_completion;
+ struct mutex lock;
+};
+
+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 in0_input_show(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ struct jz4740_hwmon *hwmon = dev_get_drvdata(dev);
+ struct platform_device *pdev = hwmon->pdev;
+ struct completion *completion = &hwmon->read_completion;
+ long t;
+ unsigned long val;
+ int ret;
+
+ mutex_lock(&hwmon->lock);
+
+ reinit_completion(completion);
+
+ enable_irq(hwmon->irq);
+ hwmon->cell->enable(pdev);
+
+ 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(pdev);
+ disable_irq(hwmon->irq);
+
+ mutex_unlock(&hwmon->lock);
+
+ return ret;
+}
+
+static DEVICE_ATTR_RO(in0_input);
+
+static struct attribute *jz4740_attrs[] = {
+ &dev_attr_in0_input.attr,
+ NULL
+};
+
+ATTRIBUTE_GROUPS(jz4740);
+
+static int jz4740_hwmon_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct device *dev = &pdev->dev;
+ struct jz4740_hwmon *hwmon;
+ struct device *hwmon_dev;
+ struct resource *mem;
+
+ hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL);
+ if (!hwmon)
+ return -ENOMEM;
+
+ hwmon->cell = mfd_get_cell(pdev);
+
+ hwmon->irq = platform_get_irq(pdev, 0);
+ if (hwmon->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get platform irq: %d\n",
+ hwmon->irq);
+ return hwmon->irq;
+ }
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hwmon->base = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(hwmon->base))
+ return PTR_ERR(hwmon->base);
+
+ hwmon->pdev = pdev;
+ init_completion(&hwmon->read_completion);
+ mutex_init(&hwmon->lock);
+
+ ret = devm_request_irq(dev, hwmon->irq, jz4740_hwmon_irq, 0,
+ pdev->name, hwmon);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
+ return ret;
+ }
+ disable_irq(hwmon->irq);
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev, "jz4740", hwmon,
+ jz4740_groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static struct platform_driver jz4740_hwmon_driver = {
+ .probe = jz4740_hwmon_probe,
+ .driver = {
+ .name = "jz4740-hwmon",
+ },
+};
+
+module_platform_driver(jz4740_hwmon_driver);
+
+MODULE_DESCRIPTION("JZ4740 SoC HWMON driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:jz4740-hwmon");