> > This patch adds the extcon support for AXP288 PMIC which has the BC1.2
> > charger detection capability. Additionally it also adds the USB mux
> > switching support b/w SOC and PMIC based on GPIO control.
> >
> > Signed-off-by: Ramakrishna Pallala <ramakrishna.pall...@intel.com>
> > ---
> > drivers/extcon/Kconfig | 7 +
> > drivers/extcon/Makefile | 1 +
> > drivers/extcon/extcon-axp288.c | 399
> ++++++++++++++++++++++++++++++++++++++++
> > include/linux/mfd/axp20x.h | 9 +
> > 4 files changed, 416 insertions(+)
> > create mode 100644 drivers/extcon/extcon-axp288.c
> >
> > diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index
> > fdc0bf0..2305edc 100644
> > --- a/drivers/extcon/Kconfig
> > +++ b/drivers/extcon/Kconfig
> > @@ -28,6 +28,13 @@ config EXTCON_ARIZONA
> > with Wolfson Arizona devices. These are audio CODECs with
> > advanced audio accessory detection support.
> >
> > +config EXTCON_AXP288
> > + tristate "X-Power AXP288 EXTCON support"
> > + depends on MFD_AXP20X && USB_PHY
> > + help
> > + Say Y here to enable support for USB peripheral detection
> > + and USB MUX switching by X-Power AXP288 PMIC.
> > +
> > config EXTCON_GPIO
> > tristate "GPIO extcon support"
> > depends on GPIOLIB
> > diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile index
> > 9204114..ba787d0 100644
> > --- a/drivers/extcon/Makefile
> > +++ b/drivers/extcon/Makefile
> > @@ -5,6 +5,7 @@
> > obj-$(CONFIG_EXTCON) += extcon.o
> > obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o
> > obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
> > +obj-$(CONFIG_EXTCON_AXP288) += extcon-axp288.o
> > obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
> > obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
> > obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
> > diff --git a/drivers/extcon/extcon-axp288.c
> > b/drivers/extcon/extcon-axp288.c new file mode 100644 index
> > 0000000..91d764c
> > --- /dev/null
> > +++ b/drivers/extcon/extcon-axp288.c
> > @@ -0,0 +1,399 @@
> > +/*
> > + * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection
> > +driver
> > + *
> > + * Copyright (C) 2014 Intel Corporation
> > + * Author: Ramakrishna Pallala <ramakrishna.pall...@intel.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.
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/kernel.h>
> > +#include <linux/io.h>
> > +#include <linux/slab.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/property.h>
> > +#include <linux/usb/phy.h>
> > +#include <linux/notifier.h>
> > +#include <linux/extcon.h>
> > +#include <linux/regmap.h>
> > +#include <linux/gpio.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/mfd/axp20x.h>
[snip]
> > +module_platform_driver(axp288_extcon_driver);
> > +
> > +MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pall...@intel.com>");
> > +MODULE_DESCRIPTION("X-Powers AXP288 extcon driver");
> > +MODULE_LICENSE("GPL v2");
> > diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
> > index dfabd6d..81152e2 100644
> > --- a/include/linux/mfd/axp20x.h
> > +++ b/include/linux/mfd/axp20x.h
> > @@ -275,4 +275,13 @@ struct axp20x_fg_pdata {
> > int thermistor_curve[MAX_THERM_CURVE_SIZE][2];
> > };
> >
> > +#define AXP288_EXTCON_CABLE_SDP "SLOW-CHARGER"
> > +#define AXP288_EXTCON_CABLE_CDP "CHARGE-
> DOWNSTREAM"
> > +#define AXP288_EXTCON_CABLE_DCP "FAST-CHARGER"
>
> #defines are meant to make things *easier* for humans to read. It is my
> opinion
> that these negatively impact the readability of the code.
These macros will be used in extcon and charger drivers. How can I make it more
readable?
> > +struct axp288_extcon_pdata {
> > + /* GPIO pin control to switch D+/D- lines b/w PMIC and SOC */
> > + struct gpio_desc *gpio_mux_cntl;
> > +};
>
> Are you going to add to this?
Yes, this is needed.
Thanks,
Ram
