On Wed, 29 Jun 2016, Keerthy wrote: > The LP873X chip is a power management IC for Portable Navigation Systems > and Tablet Computing devices. It contains the following components: > > - Regulators. > - Configurable General Purpose Output Signals(GPO). > > PMIC interacts with the main processor through i2c. PMIC has > couple of LDOs(Linear Regulators), couple of BUCKs (Step-Down DC-DC > Converter Cores) and GPOs(General Purpose Output Signals). > > Signed-off-by: Keerthy <j-keerthy@xxxxxx> > --- > > Changes in v4: > > * Added Author. > * Added the mfd_cell for gpio. > > Changes in v3: > > * Reordered the probe code. > * Fixed Typo in Kconfig description. > * Removed unused member from struct lp873x. > > drivers/mfd/Kconfig | 14 +++ > drivers/mfd/Makefile | 2 + > drivers/mfd/lp873x.c | 99 +++++++++++++++++ > include/linux/mfd/lp873x.h | 264 +++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 379 insertions(+) > create mode 100644 drivers/mfd/lp873x.c > create mode 100644 include/linux/mfd/lp873x.h > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index 9987d86..e68ac28 100644 > --- a/drivers/mfd/Kconfig > +++ b/drivers/mfd/Kconfig > @@ -1221,6 +1221,20 @@ config MFD_TPS65217 > This driver can also be built as a module. If so, the module > will be called tps65217. > > +config MFD_LP873X Nicer as MFD_TI_LP873X I think. > + tristate "TI LP873X Power Management IC" > + depends on I2C > + select MFD_CORE > + select REGMAP_I2C > + help > + If you say yes here then you get support for the LP873X series of > + power management integrated circuits(PMIC). Power Management Integrated Circuits (PMIC). > + These include voltage regulators, Thermal protection, Configurable > + general purpose outputs(GPO) that are used in portable devices. Some here. Please standardise your capitalisation. > + This driver can also be built as a module. If so, the module > + will be called lp873x. > + > config MFD_TPS65218 > tristate "TI TPS65218 Power Management chips" > depends on I2C > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > index 2ba3ba3..7d9b965 100644 > --- a/drivers/mfd/Makefile > +++ b/drivers/mfd/Makefile > @@ -22,6 +22,8 @@ obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o > obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o > obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o > > +obj-$(CONFIG_MFD_LP873X) += lp873x.o > + > obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o > obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o > obj-$(CONFIG_MFD_TI_AM335X_TSCADC) += ti_am335x_tscadc.o > diff --git a/drivers/mfd/lp873x.c b/drivers/mfd/lp873x.c > new file mode 100644 > index 0000000..54ed0ce > --- /dev/null > +++ b/drivers/mfd/lp873x.c > @@ -0,0 +1,99 @@ > +/* > + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/ > + * > + * Author: Keerthy <j-keerthy@xxxxxx> > + * > + * 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 version 2. > + * > + * This program is distributed "as is" WITHOUT ANY WARRANTY of any > + * kind, whether express or implied; without even the implied warranty > + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/interrupt.h> > +#include <linux/mfd/core.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include <linux/regmap.h> > + > +#include <linux/mfd/lp873x.h> > + > +static const struct regmap_config lp873x_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > + .max_register = LP873X_REG_MAX, > +}; > + > +static const struct mfd_cell lp873x_cells[] = { > + { .name = "lp873x-regulator", }, > + { .name = "lp873x-gpio", }, > +}; > + > +static int lp873x_probe(struct i2c_client *client, > + const struct i2c_device_id *ids) > +{ > + struct lp873x *lp873; > + int ret; > + unsigned int otpid; > + > + lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL); > + if (!lp873) > + return -ENOMEM; > + > + lp873->dev = &client->dev; > + > + lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config); > + if (IS_ERR(lp873->regmap)) { > + ret = PTR_ERR(lp873->regmap); > + dev_err(lp873->dev, "Failed to initialize register map: %d\n", > + ret); Nit: I'd prefer you break after "->dev,". > + return ret; > + } > + > + mutex_init(&lp873->lp873_lock); How many locks do you have in 'struct lp873x'? I suggest that 'lock' will do fine. > + ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid); > + if (ret) { > + dev_err(lp873->dev, "Failed to read OTP ID\n"); > + return ret; > + } > + > + lp873->rev = otpid & LP873X_OTP_REV_OTP_ID; > + i2c_set_clientdata(client, lp873); > + ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells, > + ARRAY_SIZE(lp873x_cells), NULL, 0, NULL); > + > + return ret; > +} > + > +static const struct of_device_id of_lp873x_match_table[] = { > + { .compatible = "ti,lp8733", }, > + { .compatible = "ti,lp8732", }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, of_lp873x_match_table); > + > +static const struct i2c_device_id lp873x_id_table[] = { > + { "lp873x", LP873X }, > + { "lp8732", LP873X }, > + { "lp8733", LP873X }, Do you use these IDs at any point? [...] -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
