1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/mfd/ucb1x00-assabet.c b/drivers/mfd/ucb1x00-assabet.c
new file mode 100644
index 000000000..ecc9e9fc3
--- /dev/null
+++ b/drivers/mfd/ucb1x00-assabet.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  linux/drivers/mfd/ucb1x00-assabet.c
+ *
+ *  Copyright (C) 2001-2003 Russell King, All Rights Reserved.
+ *
+ *  We handle the machine-specific bits of the UCB1x00 driver here.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/proc_fs.h>
+#include <linux/mfd/ucb1x00.h>
+
+#define UCB1X00_ATTR(name,input)\
+static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
+			   char *buf)	\
+{								\
+	struct ucb1x00 *ucb = classdev_to_ucb1x00(dev);		\
+	int val;						\
+	ucb1x00_adc_enable(ucb);				\
+	val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC);		\
+	ucb1x00_adc_disable(ucb);				\
+	return sprintf(buf, "%d\n", val);			\
+}								\
+static DEVICE_ATTR(name,0444,name##_show,NULL)
+
+UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
+UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
+UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
+
+static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
+{
+	struct ucb1x00 *ucb = dev->ucb;
+	struct platform_device *pdev;
+	struct gpio_keys_platform_data keys;
+	static struct gpio_keys_button buttons[6];
+	unsigned i;
+
+	memset(buttons, 0, sizeof(buttons));
+	memset(&keys, 0, sizeof(keys));
+
+	for (i = 0; i < ARRAY_SIZE(buttons); i++) {
+		buttons[i].code = BTN_0 + i;
+		buttons[i].gpio = ucb->gpio.base + i;
+		buttons[i].type = EV_KEY;
+		buttons[i].can_disable = true;
+	}
+
+	keys.buttons = buttons;
+	keys.nbuttons = ARRAY_SIZE(buttons);
+	keys.poll_interval = 50;
+	keys.name = "ucb1x00";
+
+	pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1,
+		&keys, sizeof(keys));
+
+	device_create_file(&ucb->dev, &dev_attr_vbatt);
+	device_create_file(&ucb->dev, &dev_attr_vcharger);
+	device_create_file(&ucb->dev, &dev_attr_batt_temp);
+
+	dev->priv = pdev;
+	return 0;
+}
+
+static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
+{
+	struct platform_device *pdev = dev->priv;
+
+	if (!IS_ERR(pdev))
+		platform_device_unregister(pdev);
+
+	device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp);
+	device_remove_file(&dev->ucb->dev, &dev_attr_vcharger);
+	device_remove_file(&dev->ucb->dev, &dev_attr_vbatt);
+}
+
+static struct ucb1x00_driver ucb1x00_assabet_driver = {
+	.add	= ucb1x00_assabet_add,
+	.remove	= ucb1x00_assabet_remove,
+};
+
+static int __init ucb1x00_assabet_init(void)
+{
+	return ucb1x00_register_driver(&ucb1x00_assabet_driver);
+}
+
+static void __exit ucb1x00_assabet_exit(void)
+{
+	ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
+}
+
+module_init(ucb1x00_assabet_init);
+module_exit(ucb1x00_assabet_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
+MODULE_LICENSE("GPL");