Initial import

1 files changed, 148 insertions, 0 deletions

diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c
new file mode 100644
index 000000000..a4cb7a522
--- /dev/null
+++ b/drivers/mfd/lm3533-ctrlbank.c
@@ -0,0 +1,148 @@
+/*
+ * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
+ *
+ * Copyright (C) 2011-2012 Texas Instruments
+ *
+ * Author: Johan Hovold <jhovold@gmail.com>
+ *
+ * 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.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+
+#include <linux/mfd/lm3533.h>
+
+
+#define LM3533_MAX_CURRENT_MIN		5000
+#define LM3533_MAX_CURRENT_MAX		29800
+#define LM3533_MAX_CURRENT_STEP		800
+
+#define LM3533_BRIGHTNESS_MAX		255
+#define LM3533_PWM_MAX			0x3f
+
+#define LM3533_REG_PWM_BASE		0x14
+#define LM3533_REG_MAX_CURRENT_BASE	0x1f
+#define LM3533_REG_CTRLBANK_ENABLE	0x27
+#define LM3533_REG_BRIGHTNESS_BASE	0x40
+
+
+static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base)
+{
+	return base + cb->id;
+}
+
+int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
+{
+	u8 mask;
+	int ret;
+
+	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
+
+	mask = 1 << cb->id;
+	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE,
+								mask, mask);
+	if (ret)
+		dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable);
+
+int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
+{
+	u8 mask;
+	int ret;
+
+	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
+
+	mask = 1 << cb->id;
+	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask);
+	if (ret)
+		dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
+
+/*
+ * Full-scale current.
+ *
+ * imax		5000 - 29800 uA (800 uA step)
+ */
+int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
+{
+	u8 reg;
+	u8 val;
+	int ret;
+
+	if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX)
+		return -EINVAL;
+
+	val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;
+
+	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
+	ret = lm3533_write(cb->lm3533, reg, val);
+	if (ret)
+		dev_err(cb->dev, "failed to set max current\n");
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current);
+
+#define lm3533_ctrlbank_set(_name, _NAME)				\
+int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val)	\
+{									\
+	u8 reg;								\
+	int ret;							\
+									\
+	if (val > LM3533_##_NAME##_MAX)					\
+		return -EINVAL;						\
+									\
+	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE);	\
+	ret = lm3533_write(cb->lm3533, reg, val);			\
+	if (ret)							\
+		dev_err(cb->dev, "failed to set " #_name "\n");		\
+									\
+	return ret;							\
+}									\
+EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);
+
+#define lm3533_ctrlbank_get(_name, _NAME)				\
+int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val)	\
+{									\
+	u8 reg;								\
+	int ret;							\
+									\
+	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE);	\
+	ret = lm3533_read(cb->lm3533, reg, val);			\
+	if (ret)							\
+		dev_err(cb->dev, "failed to get " #_name "\n");		\
+									\
+	return ret;							\
+}									\
+EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
+
+lm3533_ctrlbank_set(brightness, BRIGHTNESS);
+lm3533_ctrlbank_get(brightness, BRIGHTNESS);
+
+/*
+ * PWM-input control mask:
+ *
+ *   bit 5 - PWM-input enabled in Zone 4
+ *   bit 4 - PWM-input enabled in Zone 3
+ *   bit 3 - PWM-input enabled in Zone 2
+ *   bit 2 - PWM-input enabled in Zone 1
+ *   bit 1 - PWM-input enabled in Zone 0
+ *   bit 0 - PWM-input enabled
+ */
+lm3533_ctrlbank_set(pwm, PWM);
+lm3533_ctrlbank_get(pwm, PWM);
+
+
+MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
+MODULE_DESCRIPTION("LM3533 Control Bank interface");
+MODULE_LICENSE("GPL");