forked from Minki/linux
power: supply: cpcap-charger: Add minimal CPCAP PMIC battery charger
The custom CPCAP PMIC used on Motorola phones such as Droid 4 has a USB battery charger. It can optionally also have a companion chip that is used for wireless charging. The charger on CPCAP also can feed VBUS for the USB host mode. This can be handled by the existing kernel phy_companion interface. Cc: devicetree@vger.kernel.org Cc: Marcel Partap <mpartap@gmx.net> Cc: Michael Scott <michael.scott@linaro.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Tony Lindgren
Sebastian Reichel
parent
da26580f4e
commit
0c9888e3c1
@ -0,0 +1,37 @@
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Motorola CPCAP PMIC battery charger binding
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Required properties:
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- compatible: Shall be "motorola,mapphone-cpcap-charger"
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- interrupts: Interrupt specifier for each name in interrupt-names
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- interrupt-names: Should contain the following entries:
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"chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
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"rvrs_mode", "chrgcurr1", "vbusvld", "battdetb"
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- io-channels: IIO ADC channel specifier for each name in io-channel-names
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- io-channel-names: Should contain the following entries:
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"battdetb", "battp", "vbus", "chg_isense", "batti"
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Optional properties:
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- mode-gpios: Optionally CPCAP charger can have a companion wireless
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charge controller that is controlled with two GPIOs
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that are active low.
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Example:
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cpcap_charger: charger {
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compatible = "motorola,mapphone-cpcap-charger";
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interrupts-extended = <
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&cpcap 13 0 &cpcap 12 0 &cpcap 29 0 &cpcap 28 0
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&cpcap 22 0 &cpcap 20 0 &cpcap 19 0 &cpcap 54 0
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>;
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interrupt-names =
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"chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
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"rvrs_mode", "chrgcurr1", "vbusvld", "battdetb";
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mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW
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&gpio3 23 GPIO_ACTIVE_LOW>;
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io-channels = <&cpcap_adc 0 &cpcap_adc 1
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&cpcap_adc 2 &cpcap_adc 5
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&cpcap_adc 6>;
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io-channel-names = "battdetb", "battp",
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"vbus", "chg_isense",
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"batti";
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};
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@ -317,6 +317,14 @@ config BATTERY_RX51
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Say Y here to enable support for battery information on Nokia
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RX-51, also known as N900 tablet.
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config CHARGER_CPCAP
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tristate "CPCAP PMIC Charger Driver"
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depends on MFD_CPCAP && IIO
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default MFD_CPCAP
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help
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Say Y to enable support for CPCAP PMIC charger driver for Motorola
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mobile devices such as Droid 4.
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config CHARGER_ISP1704
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tristate "ISP1704 USB Charger Detection"
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depends on USB_PHY
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@ -51,6 +51,7 @@ obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
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obj-$(CONFIG_BATTERY_JZ4740) += jz4740-battery.o
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obj-$(CONFIG_BATTERY_RX51) += rx51_battery.o
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obj-$(CONFIG_AB8500_BM) += ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o abx500_chargalg.o pm2301_charger.o
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obj-$(CONFIG_CHARGER_CPCAP) += cpcap-charger.o
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obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o
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obj-$(CONFIG_CHARGER_MAX8903) += max8903_charger.o
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obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o
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681
drivers/power/supply/cpcap-charger.c
Normal file
681
drivers/power/supply/cpcap-charger.c
Normal file
@ -0,0 +1,681 @@
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/*
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* Motorola CPCAP PMIC battery charger driver
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*
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* Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
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*
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* Rewritten for Linux power framework with some parts based on
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* on earlier driver found in the Motorola Linux kernel:
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*
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* Copyright (C) 2009-2010 Motorola, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/atomic.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/notifier.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/gpio/consumer.h>
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#include <linux/usb/phy_companion.h>
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#include <linux/phy/omap_usb.h>
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#include <linux/usb/otg.h>
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#include <linux/iio/consumer.h>
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#include <linux/mfd/motorola-cpcap.h>
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/* CPCAP_REG_CRM register bits */
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#define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */
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#define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */
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#define CPCAP_REG_CRM_CHRG_LED_EN BIT(13)
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#define CPCAP_REG_CRM_RVRSMODE BIT(12)
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#define CPCAP_REG_CRM_ICHRG_TR1 BIT(11)
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#define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
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#define CPCAP_REG_CRM_FET_OVRD BIT(9)
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#define CPCAP_REG_CRM_FET_CTRL BIT(8)
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#define CPCAP_REG_CRM_VCHRG3 BIT(7)
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#define CPCAP_REG_CRM_VCHRG2 BIT(6)
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#define CPCAP_REG_CRM_VCHRG1 BIT(5)
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#define CPCAP_REG_CRM_VCHRG0 BIT(4)
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#define CPCAP_REG_CRM_ICHRG3 BIT(3)
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#define CPCAP_REG_CRM_ICHRG2 BIT(2)
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#define CPCAP_REG_CRM_ICHRG1 BIT(1)
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#define CPCAP_REG_CRM_ICHRG0 BIT(0)
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/* CPCAP_REG_CRM trickle charge voltages */
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#define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10)
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#define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0)
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#define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1)
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#define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
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#define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
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/* CPCAP_REG_CRM charge voltages */
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#define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
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#define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
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#define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
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#define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x2)
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#define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x3)
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#define CPCAP_REG_CRM_VCHRG_4V22 CPCAP_REG_CRM_VCHRG(0x4)
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#define CPCAP_REG_CRM_VCHRG_4V24 CPCAP_REG_CRM_VCHRG(0x5)
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#define CPCAP_REG_CRM_VCHRG_4V26 CPCAP_REG_CRM_VCHRG(0x6)
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#define CPCAP_REG_CRM_VCHRG_4V28 CPCAP_REG_CRM_VCHRG(0x7)
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#define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x8)
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#define CPCAP_REG_CRM_VCHRG_4V32 CPCAP_REG_CRM_VCHRG(0x9)
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#define CPCAP_REG_CRM_VCHRG_4V34 CPCAP_REG_CRM_VCHRG(0xa)
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#define CPCAP_REG_CRM_VCHRG_4V36 CPCAP_REG_CRM_VCHRG(0xb)
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#define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
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#define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
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#define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
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#define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
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/* CPCAP_REG_CRM charge currents */
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#define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
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#define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
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#define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
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#define CPCAP_REG_CRM_ICHRG_0A176 CPCAP_REG_CRM_ICHRG(0x2)
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#define CPCAP_REG_CRM_ICHRG_0A264 CPCAP_REG_CRM_ICHRG(0x3)
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#define CPCAP_REG_CRM_ICHRG_0A352 CPCAP_REG_CRM_ICHRG(0x4)
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#define CPCAP_REG_CRM_ICHRG_0A440 CPCAP_REG_CRM_ICHRG(0x5)
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#define CPCAP_REG_CRM_ICHRG_0A528 CPCAP_REG_CRM_ICHRG(0x6)
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#define CPCAP_REG_CRM_ICHRG_0A616 CPCAP_REG_CRM_ICHRG(0x7)
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#define CPCAP_REG_CRM_ICHRG_0A704 CPCAP_REG_CRM_ICHRG(0x8)
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#define CPCAP_REG_CRM_ICHRG_0A792 CPCAP_REG_CRM_ICHRG(0x9)
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#define CPCAP_REG_CRM_ICHRG_0A880 CPCAP_REG_CRM_ICHRG(0xa)
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#define CPCAP_REG_CRM_ICHRG_0A968 CPCAP_REG_CRM_ICHRG(0xb)
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#define CPCAP_REG_CRM_ICHRG_1A056 CPCAP_REG_CRM_ICHRG(0xc)
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#define CPCAP_REG_CRM_ICHRG_1A144 CPCAP_REG_CRM_ICHRG(0xd)
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#define CPCAP_REG_CRM_ICHRG_1A584 CPCAP_REG_CRM_ICHRG(0xe)
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#define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
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enum {
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CPCAP_CHARGER_IIO_BATTDET,
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CPCAP_CHARGER_IIO_VOLTAGE,
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CPCAP_CHARGER_IIO_VBUS,
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CPCAP_CHARGER_IIO_CHRG_CURRENT,
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CPCAP_CHARGER_IIO_BATT_CURRENT,
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CPCAP_CHARGER_IIO_NR,
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};
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struct cpcap_charger_ddata {
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struct device *dev;
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struct regmap *reg;
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struct list_head irq_list;
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struct delayed_work detect_work;
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struct delayed_work vbus_work;
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struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */
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struct iio_channel *channels[CPCAP_CHARGER_IIO_NR];
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struct power_supply *usb;
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struct phy_companion comparator; /* For USB VBUS */
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bool vbus_enabled;
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atomic_t active;
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int status;
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};
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struct cpcap_interrupt_desc {
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int irq;
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struct list_head node;
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const char *name;
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};
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struct cpcap_charger_ints_state {
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bool chrg_det;
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bool rvrs_chrg;
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bool vbusov;
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bool chrg_se1b;
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bool rvrs_mode;
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bool chrgcurr1;
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bool vbusvld;
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bool battdetb;
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};
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static enum power_supply_property cpcap_charger_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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};
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static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata)
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{
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struct iio_channel *channel;
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int error, value;
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channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET];
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error = iio_read_channel_raw(channel, &value);
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if (error < 0) {
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dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
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return false;
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}
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return value == 1;
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}
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static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
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{
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struct iio_channel *channel;
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int error, value = 0;
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channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE];
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error = iio_read_channel_processed(channel, &value);
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if (error < 0) {
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dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
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return 0;
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}
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return value;
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}
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static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata)
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{
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struct iio_channel *channel;
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int error, value = 0;
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channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT];
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error = iio_read_channel_processed(channel, &value);
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if (error < 0) {
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dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
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return 0;
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}
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return value;
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}
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static int cpcap_charger_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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val->intval = ddata->status;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
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val->intval = cpcap_charger_get_charge_voltage(ddata) *
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1000;
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else
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val->intval = 0;
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
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val->intval = cpcap_charger_get_charge_current(ddata) *
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1000;
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else
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val->intval = 0;
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
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bool enabled)
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{
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if (!ddata->gpio[0])
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return;
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gpiod_set_value(ddata->gpio[0], enabled);
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}
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static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata,
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bool enabled)
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{
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if (!ddata->gpio[1])
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return;
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gpiod_set_value(ddata->gpio[1], enabled);
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}
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static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata,
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int max_voltage, int charge_current,
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int trickle_current)
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{
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bool enable;
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int error;
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enable = max_voltage && (charge_current || trickle_current);
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dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable);
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if (!enable) {
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error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
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0x3fff,
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CPCAP_REG_CRM_FET_OVRD |
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CPCAP_REG_CRM_FET_CTRL);
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if (error) {
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ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
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goto out_err;
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}
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ddata->status = POWER_SUPPLY_STATUS_DISCHARGING;
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return 0;
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}
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error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
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CPCAP_REG_CRM_CHRG_LED_EN |
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trickle_current |
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CPCAP_REG_CRM_FET_OVRD |
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CPCAP_REG_CRM_FET_CTRL |
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max_voltage |
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charge_current);
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if (error) {
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ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
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goto out_err;
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}
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ddata->status = POWER_SUPPLY_STATUS_CHARGING;
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return 0;
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out_err:
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dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
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return error;
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}
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static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata)
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{
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int error, value = 0;
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struct iio_channel *channel =
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ddata->channels[CPCAP_CHARGER_IIO_VBUS];
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error = iio_read_channel_processed(channel, &value);
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if (error >= 0)
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return value > 3900 ? true : false;
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dev_err(ddata->dev, "error reading VBUS: %i\n", error);
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return false;
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}
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/* VBUS control functions for the USB PHY companion */
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static void cpcap_charger_vbus_work(struct work_struct *work)
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{
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struct cpcap_charger_ddata *ddata;
|
||||
bool vbus = false;
|
||||
int error;
|
||||
|
||||
ddata = container_of(work, struct cpcap_charger_ddata,
|
||||
vbus_work.work);
|
||||
|
||||
if (ddata->vbus_enabled) {
|
||||
vbus = cpcap_charger_vbus_valid(ddata);
|
||||
if (vbus) {
|
||||
dev_info(ddata->dev, "VBUS already provided\n");
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
cpcap_charger_set_cable_path(ddata, false);
|
||||
cpcap_charger_set_inductive_path(ddata, false);
|
||||
|
||||
error = cpcap_charger_set_state(ddata, 0, 0, 0);
|
||||
if (error)
|
||||
goto out_err;
|
||||
|
||||
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
|
||||
CPCAP_REG_CRM_RVRSMODE,
|
||||
CPCAP_REG_CRM_RVRSMODE);
|
||||
if (error)
|
||||
goto out_err;
|
||||
} else {
|
||||
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
|
||||
CPCAP_REG_CRM_RVRSMODE, 0);
|
||||
if (error)
|
||||
goto out_err;
|
||||
|
||||
cpcap_charger_set_cable_path(ddata, true);
|
||||
cpcap_charger_set_inductive_path(ddata, true);
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
out_err:
|
||||
dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__,
|
||||
ddata->vbus_enabled ? "enable" : "disable", error);
|
||||
}
|
||||
|
||||
static int cpcap_charger_set_vbus(struct phy_companion *comparator,
|
||||
bool enabled)
|
||||
{
|
||||
struct cpcap_charger_ddata *ddata =
|
||||
container_of(comparator, struct cpcap_charger_ddata,
|
||||
comparator);
|
||||
|
||||
ddata->vbus_enabled = enabled;
|
||||
schedule_delayed_work(&ddata->vbus_work, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Charger interrupt handling functions */
|
||||
|
||||
static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata,
|
||||
struct cpcap_charger_ints_state *s)
|
||||
{
|
||||
int val, error;
|
||||
|
||||
error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
s->chrg_det = val & BIT(13);
|
||||
s->rvrs_chrg = val & BIT(12);
|
||||
s->vbusov = val & BIT(11);
|
||||
|
||||
error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
s->chrg_se1b = val & BIT(13);
|
||||
s->rvrs_mode = val & BIT(6);
|
||||
s->chrgcurr1 = val & BIT(4);
|
||||
s->vbusvld = val & BIT(3);
|
||||
|
||||
error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
s->battdetb = val & BIT(6);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cpcap_usb_detect(struct work_struct *work)
|
||||
{
|
||||
struct cpcap_charger_ddata *ddata;
|
||||
struct cpcap_charger_ints_state s;
|
||||
int error;
|
||||
|
||||
ddata = container_of(work, struct cpcap_charger_ddata,
|
||||
detect_work.work);
|
||||
|
||||
error = cpcap_charger_get_ints_state(ddata, &s);
|
||||
if (error)
|
||||
return;
|
||||
|
||||
if (cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) {
|
||||
int max_current;
|
||||
|
||||
if (cpcap_charger_battery_found(ddata))
|
||||
max_current = CPCAP_REG_CRM_ICHRG_1A584;
|
||||
else
|
||||
max_current = CPCAP_REG_CRM_ICHRG_0A528;
|
||||
|
||||
error = cpcap_charger_set_state(ddata,
|
||||
CPCAP_REG_CRM_VCHRG_4V20,
|
||||
max_current,
|
||||
CPCAP_REG_CRM_TR_0A72);
|
||||
if (error)
|
||||
goto out_err;
|
||||
} else {
|
||||
error = cpcap_charger_set_state(ddata, 0, 0, 0);
|
||||
if (error)
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
out_err:
|
||||
dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
|
||||
}
|
||||
|
||||
static irqreturn_t cpcap_charger_irq_thread(int irq, void *data)
|
||||
{
|
||||
struct cpcap_charger_ddata *ddata = data;
|
||||
|
||||
if (!atomic_read(&ddata->active))
|
||||
return IRQ_NONE;
|
||||
|
||||
schedule_delayed_work(&ddata->detect_work, 0);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int cpcap_usb_init_irq(struct platform_device *pdev,
|
||||
struct cpcap_charger_ddata *ddata,
|
||||
const char *name)
|
||||
{
|
||||
struct cpcap_interrupt_desc *d;
|
||||
int irq, error;
|
||||
|
||||
irq = platform_get_irq_byname(pdev, name);
|
||||
if (!irq)
|
||||
return -ENODEV;
|
||||
|
||||
error = devm_request_threaded_irq(ddata->dev, irq, NULL,
|
||||
cpcap_charger_irq_thread,
|
||||
IRQF_SHARED,
|
||||
name, ddata);
|
||||
if (error) {
|
||||
dev_err(ddata->dev, "could not get irq %s: %i\n",
|
||||
name, error);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
d->name = name;
|
||||
d->irq = irq;
|
||||
list_add(&d->node, &ddata->irq_list);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const char * const cpcap_charger_irqs[] = {
|
||||
/* REG_INT_0 */
|
||||
"chrg_det", "rvrs_chrg",
|
||||
|
||||
/* REG_INT1 */
|
||||
"chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld",
|
||||
|
||||
/* REG_INT_3 */
|
||||
"battdetb",
|
||||
};
|
||||
|
||||
static int cpcap_usb_init_interrupts(struct platform_device *pdev,
|
||||
struct cpcap_charger_ddata *ddata)
|
||||
{
|
||||
int i, error;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) {
|
||||
error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 2; i++) {
|
||||
ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
|
||||
i, GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(ddata->gpio[i])) {
|
||||
dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
|
||||
i, PTR_ERR(ddata->gpio[i]));
|
||||
ddata->gpio[i] = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
|
||||
{
|
||||
const char * const names[CPCAP_CHARGER_IIO_NR] = {
|
||||
"battdetb", "battp", "vbus", "chg_isense", "batti",
|
||||
};
|
||||
int error, i;
|
||||
|
||||
for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) {
|
||||
ddata->channels[i] = devm_iio_channel_get(ddata->dev,
|
||||
names[i]);
|
||||
if (IS_ERR(ddata->channels[i])) {
|
||||
error = PTR_ERR(ddata->channels[i]);
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
if (!ddata->channels[i]->indio_dev) {
|
||||
error = -ENXIO;
|
||||
goto out_err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
out_err:
|
||||
dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
|
||||
error);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
static const struct power_supply_desc cpcap_charger_usb_desc = {
|
||||
.name = "cpcap_usb",
|
||||
.type = POWER_SUPPLY_TYPE_USB,
|
||||
.properties = cpcap_charger_props,
|
||||
.num_properties = ARRAY_SIZE(cpcap_charger_props),
|
||||
.get_property = cpcap_charger_get_property,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id cpcap_charger_id_table[] = {
|
||||
{
|
||||
.compatible = "motorola,mapphone-cpcap-charger",
|
||||
},
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, cpcap_charger_id_table);
|
||||
#endif
|
||||
|
||||
static int cpcap_charger_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct cpcap_charger_ddata *ddata;
|
||||
const struct of_device_id *of_id;
|
||||
int error;
|
||||
|
||||
of_id = of_match_device(of_match_ptr(cpcap_charger_id_table),
|
||||
&pdev->dev);
|
||||
if (!of_id)
|
||||
return -EINVAL;
|
||||
|
||||
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
|
||||
if (!ddata)
|
||||
return -ENOMEM;
|
||||
|
||||
ddata->dev = &pdev->dev;
|
||||
|
||||
ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
|
||||
if (!ddata->reg)
|
||||
return -ENODEV;
|
||||
|
||||
INIT_LIST_HEAD(&ddata->irq_list);
|
||||
INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
|
||||
INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work);
|
||||
platform_set_drvdata(pdev, ddata);
|
||||
|
||||
error = cpcap_charger_init_iio(ddata);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
atomic_set(&ddata->active, 1);
|
||||
|
||||
ddata->usb = devm_power_supply_register(ddata->dev,
|
||||
&cpcap_charger_usb_desc,
|
||||
NULL);
|
||||
if (IS_ERR(ddata->usb)) {
|
||||
error = PTR_ERR(ddata->usb);
|
||||
dev_err(ddata->dev, "failed to register USB charger: %i\n",
|
||||
error);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
error = cpcap_usb_init_interrupts(pdev, ddata);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
ddata->comparator.set_vbus = cpcap_charger_set_vbus;
|
||||
error = omap_usb2_set_comparator(&ddata->comparator);
|
||||
if (error == -ENODEV) {
|
||||
dev_info(ddata->dev, "charger needs phy, deferring probe\n");
|
||||
return -EPROBE_DEFER;
|
||||
}
|
||||
|
||||
cpcap_charger_init_optional_gpios(ddata);
|
||||
|
||||
schedule_delayed_work(&ddata->detect_work, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cpcap_charger_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev);
|
||||
int error;
|
||||
|
||||
atomic_set(&ddata->active, 0);
|
||||
error = omap_usb2_set_comparator(NULL);
|
||||
if (error)
|
||||
dev_warn(ddata->dev, "could not clear USB comparator: %i\n",
|
||||
error);
|
||||
|
||||
error = cpcap_charger_set_state(ddata, 0, 0, 0);
|
||||
if (error)
|
||||
dev_warn(ddata->dev, "could not clear charger: %i\n",
|
||||
error);
|
||||
cancel_delayed_work_sync(&ddata->vbus_work);
|
||||
cancel_delayed_work_sync(&ddata->detect_work);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver cpcap_charger_driver = {
|
||||
.probe = cpcap_charger_probe,
|
||||
.driver = {
|
||||
.name = "cpcap-charger",
|
||||
.of_match_table = of_match_ptr(cpcap_charger_id_table),
|
||||
},
|
||||
.remove = cpcap_charger_remove,
|
||||
};
|
||||
module_platform_driver(cpcap_charger_driver);
|
||||
|
||||
MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
|
||||
MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:cpcap-charger");
|
||||
Loading…
Reference in New Issue
Block a user