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authorBalaji Rao <balajirrao@openmoko.org>2009-01-09 01:49:26 +0100
committerSamuel Ortiz <samuel@sortiz.org>2009-01-11 01:34:23 +0100
commit08c3e06a5eb27d43b712adef18379f8464425e71 (patch)
tree63950d3beac51f8ca4e51c4fae7959a50608f31e /include/linux/mfd
parentf52046b14b1e1a8a02ae48d0c69d39c5e204644f (diff)
mfd: PCF50633 adc driver
This patch adds basic support for the PCF50633 ADC. The subtractive mode is not supported yet. Since we don't have adc subsystem, it currently lives in drivers/mfd. Signed-off-by: Balaji Rao <balajirrao@openmoko.org> Cc: Andy Green <andy@openmoko.com> Acked-by: Jonathan Cameron <jonathan.cameron@gmail.com> Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Diffstat (limited to 'include/linux/mfd')
-rw-r--r--include/linux/mfd/pcf50633/adc.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/mfd/pcf50633/adc.h b/include/linux/mfd/pcf50633/adc.h
new file mode 100644
index 00000000000..56669b4183a
--- /dev/null
+++ b/include/linux/mfd/pcf50633/adc.h
@@ -0,0 +1,72 @@
+/*
+ * adc.h -- Driver for NXP PCF50633 ADC
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_MFD_PCF50633_ADC_H
+#define __LINUX_MFD_PCF50633_ADC_H
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/platform_device.h>
+
+/* ADC Registers */
+#define PCF50633_REG_ADCC3 0x52
+#define PCF50633_REG_ADCC2 0x53
+#define PCF50633_REG_ADCC1 0x54
+#define PCF50633_REG_ADCS1 0x55
+#define PCF50633_REG_ADCS2 0x56
+#define PCF50633_REG_ADCS3 0x57
+
+#define PCF50633_ADCC1_ADCSTART 0x01
+#define PCF50633_ADCC1_RES_10BIT 0x02
+#define PCF50633_ADCC1_AVERAGE_NO 0x00
+#define PCF50633_ADCC1_AVERAGE_4 0x04
+#define PCF50633_ADCC1_AVERAGE_8 0x08
+#define PCF50633_ADCC1_AVERAGE_16 0x0c
+#define PCF50633_ADCC1_MUX_BATSNS_RES 0x00
+#define PCF50633_ADCC1_MUX_BATSNS_SUBTR 0x10
+#define PCF50633_ADCC1_MUX_ADCIN2_RES 0x20
+#define PCF50633_ADCC1_MUX_ADCIN2_SUBTR 0x30
+#define PCF50633_ADCC1_MUX_BATTEMP 0x60
+#define PCF50633_ADCC1_MUX_ADCIN1 0x70
+#define PCF50633_ADCC1_AVERAGE_MASK 0x0c
+#define PCF50633_ADCC1_ADCMUX_MASK 0xf0
+
+#define PCF50633_ADCC2_RATIO_NONE 0x00
+#define PCF50633_ADCC2_RATIO_BATTEMP 0x01
+#define PCF50633_ADCC2_RATIO_ADCIN1 0x02
+#define PCF50633_ADCC2_RATIO_BOTH 0x03
+#define PCF50633_ADCC2_RATIOSETTL_100US 0x04
+
+#define PCF50633_ADCC3_ACCSW_EN 0x01
+#define PCF50633_ADCC3_NTCSW_EN 0x04
+#define PCF50633_ADCC3_RES_DIV_TWO 0x10
+#define PCF50633_ADCC3_RES_DIV_THREE 0x00
+
+#define PCF50633_ADCS3_REF_NTCSW 0x00
+#define PCF50633_ADCS3_REF_ACCSW 0x10
+#define PCF50633_ADCS3_REF_2V0 0x20
+#define PCF50633_ADCS3_REF_VISA 0x30
+#define PCF50633_ADCS3_REF_2V0_2 0x70
+#define PCF50633_ADCS3_ADCRDY 0x80
+
+#define PCF50633_ADCS3_ADCDAT1L_MASK 0x03
+#define PCF50633_ADCS3_ADCDAT2L_MASK 0x0c
+#define PCF50633_ADCS3_ADCDAT2L_SHIFT 2
+#define PCF50633_ASCS3_REF_MASK 0x70
+
+extern int
+pcf50633_adc_async_read(struct pcf50633 *pcf, int mux, int avg,
+ void (*callback)(struct pcf50633 *, void *, int),
+ void *callback_param);
+extern int
+pcf50633_adc_sync_read(struct pcf50633 *pcf, int mux, int avg);
+
+#endif /* __LINUX_PCF50633_ADC_H */