On Fri, 05 Aug 2016, Keerthy wrote: > On Friday 05 August 2016 01:33 PM, Lee Jones wrote: > > 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). > > Okay > > > > > > + These include voltage regulators, Thermal protection, Configurable > > > + general purpose outputs(GPO) that are used in portable devices. > > > > Some here. Please standardise your capitalisation. > > Okay > > > > > > + 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,". > > Okay > > > > > > + return ret; > > > + } > > > + > > > + mutex_init(&lp873->lp873_lock); > > > > How many locks do you have in 'struct lp873x'? > > > > I suggest that 'lock' will do fine. > > Okay. > > > > > > + 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? > > I have lp8733 and lp8732 at the moment. They are register exact but > different parts none the less. Hence having separate strings. As of now no > differences seen in gpio/regulator modules so not using them anywhere. I have a patch-set pending on the I2C list that removes all unused 'struct i2c_device_id' tables. To identify which ones are in use and which ones can be removed, it would help if you could remove the unused .id field. -- 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
