I2C: TWL4030: Introduce twl4030 madc driver

Introduce twl4030 madc driver.
Signed-off-by: Mikko Ylinen <mikko.k.ylinen@nokia.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

include/linux/i2c/twl4030-madc.h

+/*
+ * include/linux/i2c/twl4030-madc.h
+ *
+ * TWL4030 MADC module driver header
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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
+ *
+ */
+
+#ifndef _TWL4030_MADC_H
+#define _TWL4030_MADC_H
+
+struct twl4030_madc_conversion_method {
+	u8 sel;
+	u8 avg;
+	u8 rbase;
+	u8 ctrl;
+};
+
+#define TWL4030_MADC_MAX_CHANNELS 16
+
+struct twl4030_madc_request {
+	u16 channels;
+	u16 do_avg;
+	u16 method;
+	u16 type;
+	int active;
+	int result_pending;
+	int rbuf[TWL4030_MADC_MAX_CHANNELS];
+	void (*func_cb)(int len, int channels, int *buf);
+};
+
+enum conversion_methods {
+	TWL4030_MADC_RT,
+	TWL4030_MADC_SW1,
+	TWL4030_MADC_SW2,
+	TWL4030_MADC_NUM_METHODS
+};
+
+enum sample_type {
+	TWL4030_MADC_WAIT,
+	TWL4030_MADC_IRQ_ONESHOT,
+	TWL4030_MADC_IRQ_REARM
+};
+
+#define TWL4030_MADC_CTRL1		0x00
+#define TWL4030_MADC_CTRL2		0x01
+
+#define TWL4030_MADC_RTSELECT_LSB	0x02
+#define TWL4030_MADC_SW1SELECT_LSB	0x06
+#define TWL4030_MADC_SW2SELECT_LSB	0x0A
+
+#define TWL4030_MADC_RTAVERAGE_LSB	0x04
+#define TWL4030_MADC_SW1AVERAGE_LSB	0x08
+#define TWL4030_MADC_SW2AVERAGE_LSB	0x0C
+
+#define TWL4030_MADC_CTRL_SW1		0x12
+#define TWL4030_MADC_CTRL_SW2		0x13
+
+#define TWL4030_MADC_RTCH0_LSB		0x17
+#define TWL4030_MADC_GPCH0_LSB		0x37
+
+#define TWL4030_MADC_ISR1		0x61
+#define TWL4030_MADC_IMR1		0x62
+#define TWL4030_MADC_ISR2		0x63
+#define TWL4030_MADC_IMR2		0x64
+#define TWL4030_MADC_SIR		0x65
+#define TWL4030_MADC_EDR		0x66
+#define TWL4030_MADC_SIH_CTRL		0x67
+
+#define TWL4030_MADC_MADCON		(1<<0)	/* MADC power on */
+#define TWL4030_MADC_BUSY		(1<<0)	/* MADC busy */
+#define TWL4030_MADC_EOC_SW		(1<<1)	/* MADC conversion completion */
+#define TWL4030_MADC_SW_START		(1<<5)  /* MADC SWx start conversion */
+
+#define	TWL4030_MADC_ADCIN0		(1<<0)
+#define	TWL4030_MADC_ADCIN1		(1<<1)
+#define	TWL4030_MADC_ADCIN2		(1<<2)
+#define	TWL4030_MADC_ADCIN3		(1<<3)
+#define	TWL4030_MADC_ADCIN4		(1<<4)
+#define	TWL4030_MADC_ADCIN5		(1<<5)
+#define	TWL4030_MADC_ADCIN6		(1<<6)
+#define	TWL4030_MADC_ADCIN7		(1<<7)
+#define	TWL4030_MADC_ADCIN8		(1<<8)
+#define	TWL4030_MADC_ADCIN9		(1<<9)
+#define	TWL4030_MADC_ADCIN10		(1<<10)
+#define	TWL4030_MADC_ADCIN11		(1<<11)
+#define	TWL4030_MADC_ADCIN12		(1<<12)
+#define	TWL4030_MADC_ADCIN13		(1<<13)
+#define	TWL4030_MADC_ADCIN14		(1<<14)
+#define	TWL4030_MADC_ADCIN15		(1<<15)
+
+/* Fixed channels */
+#define TWL4030_MADC_BTEMP		TWL4030_MADC_ADCIN1
+#define TWL4030_MADC_VBUS		TWL4030_MADC_ADCIN8
+#define TWL4030_MADC_VBKB		TWL4030_MADC_ADCIN9
+#define	TWL4030_MADC_ICHG		TWL4030_MADC_ADCIN10
+#define TWL4030_MADC_VCHG		TWL4030_MADC_ADCIN11
+#define	TWL4030_MADC_VBAT		TWL4030_MADC_ADCIN12
+
+/* BCI related - XXX To be moved elsewhere */
+#define TWL4030_BCI_BCICTL1		0x23
+#define	TWL4030_BCI_MESBAT		(1<<1)
+#define	TWL4030_BCI_TYPEN		(1<<4)
+#define	TWL4030_BCI_ITHEN		(1<<3)
+
+#define TWL4030_MADC_IOC_MAGIC '`'
+#define TWL4030_MADC_IOCX_ADC_RAW_READ		_IO(TWL4030_MADC_IOC_MAGIC, 0)
+
+struct twl4030_madc_user_parms {
+	int channel;
+	int average;
+	int status;
+	u16 result;
+};
+
+int twl4030_madc_conversion(struct twl4030_madc_request *conv);
+
+#endif