On Mon, Feb 28, 2011 at 04:48:12AM -0500, Keerthy wrote: > Introducing a driver for MADC on TWL4030 powerIC. MADC stands for monitoring > ADC. This driver monitors the real time conversion of analog signals like > battery temperature, battery cuurent etc. > > Signed-off-by: Keerthy <j-keerthy@xxxxxx> > --- > > V4: > Removed unwanted else from twl4030_madc_read_channels functions. > > V3: > Added for_each_set_bit for efficient bit checking > and locking the mutex earlier in the threaded irq > handler. > > V2: > Added functions to convert raw voltages to current and temperature. > > V1: > http://www.mail-archive.com/linux-omap@xxxxxxxxxxxxxxx/msg44543.html > > drivers/mfd/Kconfig | 10 + > drivers/mfd/Makefile | 1 + > drivers/mfd/twl4030-madc.c | 812 ++++++++++++++++++++++++++++++++++++++ > include/linux/i2c/twl4030-madc.h | 142 +++++++ > 4 files changed, 965 insertions(+), 0 deletions(-) > create mode 100644 drivers/mfd/twl4030-madc.c > create mode 100644 include/linux/i2c/twl4030-madc.h > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index fd01836..029e078 100644 > --- a/drivers/mfd/Kconfig > +++ b/drivers/mfd/Kconfig > @@ -167,6 +167,16 @@ config TWL4030_CORE > high speed USB OTG transceiver, an audio codec (on most > versions) and many other features. > > +config TWL4030_MADC > + tristate "Texas Instruments TWL4030 MADC" > + depends on TWL4030_CORE > + help > + This driver provides support for triton TWL4030-MADC. The > + driver supports both RT and SW conversion methods. > + > + This driver can be built as a module. If so it will be > + named twl4030-madc > + > config TWL4030_POWER > bool "Support power resources on TWL4030 family chips" > depends on TWL4030_CORE && ARM > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > index a54e2c7..2922cc2 100644 > --- a/drivers/mfd/Makefile > +++ b/drivers/mfd/Makefile > @@ -37,6 +37,7 @@ obj-$(CONFIG_TPS6507X) += tps6507x.o > obj-$(CONFIG_MENELAUS) += menelaus.o > > obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o twl6030-irq.o > +obj-$(CONFIG_TWL4030_MADC) += twl4030-madc.o > obj-$(CONFIG_TWL4030_POWER) += twl4030-power.o > obj-$(CONFIG_TWL4030_CODEC) += twl4030-codec.o > obj-$(CONFIG_TWL6030_PWM) += twl6030-pwm.o > diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c > new file mode 100644 > index 0000000..e533c72 > --- /dev/null > +++ b/drivers/mfd/twl4030-madc.c > @@ -0,0 +1,812 @@ > +/* > + * > + * TWL4030 MADC module driver-This driver monitors the real time > + * conversion of analog signals like battery temperature, > + * battery type, battery level etc. > + * > + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ > + * J Keerthy <j-keerthy@xxxxxx> > + * > + * Based on twl4030-madc.c > + * Copyright (C) 2008 Nokia Corporation > + * Mikko Ylinen <mikko.k.ylinen@xxxxxxxxx> > + * > + * Amit Kucheria <amit.kucheria@xxxxxxxxxxxxx> > + * > + * 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 > + * > + */ > + > +#include <linux/interrupt.h> > +#include <linux/delay.h> > +#include <linux/platform_device.h> > +#include <linux/slab.h> > +#include <linux/i2c/twl.h> > +#include <linux/i2c/twl4030-madc.h> > + I didn't have a close look, but I suspect that several includes are missing here. See Documentation/SubmitChecklist, item #1. > +/* > + * struct twl4030_madc_data - a container for madc info > + * @dev - pointer to device structure for madc > + * @lock - mutex protecting this data structire > + * @requests - Array of request struct corresponding to SW1, SW2 and RT > + * @imr - Interrupt mask register of MADC > + * @isr - Interrupt status register of MADC > + */ > +struct twl4030_madc_data { > + struct device *dev; > + struct mutex lock; /* mutex protecting this data structire */ > + struct twl4030_madc_request requests[TWL4030_MADC_NUM_METHODS]; > + int imr; > + int isr; > +}; > + > +static struct twl4030_madc_data *twl4030_madc; > + > +struct twl4030_prescale_divider_ratios { > + s16 numerator; > + s16 denominator; > +}; > + > +static const struct twl4030_prescale_divider_ratios > +twl4030_divider_ratios[16] = { > + {1, 1}, /* CHANNEL 0 No Prescaler */ > + {1, 1}, /* CHANNEL 1 No Prescaler */ > + {6, 10}, /* CHANNEL 2 */ > + {6, 10}, /* CHANNEL 3 */ > + {6, 10}, /* CHANNEL 4 */ > + {6, 10}, /* CHANNEL 5 */ > + {6, 10}, /* CHANNEL 6 */ > + {6, 10}, /* CHANNEL 7 */ > + {3, 14}, /* CHANNEL 8 */ > + {1, 3}, /* CHANNEL 9 */ > + {1, 1}, /* CHANNEL 10 NA */ Something else but NA might be helpful here, to distinguish the entry form 13/14. 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