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1062 lines
27 KiB
1062 lines
27 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* tps65010 - driver for tps6501x power management chips |
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* |
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* Copyright (C) 2004 Texas Instruments |
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* Copyright (C) 2004-2005 David Brownell |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/interrupt.h> |
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#include <linux/i2c.h> |
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#include <linux/delay.h> |
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#include <linux/workqueue.h> |
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#include <linux/debugfs.h> |
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#include <linux/seq_file.h> |
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#include <linux/mutex.h> |
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#include <linux/platform_device.h> |
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#include <linux/mfd/tps65010.h> |
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#include <linux/gpio/driver.h> |
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/*-------------------------------------------------------------------------*/ |
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#define DRIVER_VERSION "2 May 2005" |
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#define DRIVER_NAME (tps65010_driver.driver.name) |
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MODULE_DESCRIPTION("TPS6501x Power Management Driver"); |
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MODULE_LICENSE("GPL"); |
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static struct i2c_driver tps65010_driver; |
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/*-------------------------------------------------------------------------*/ |
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|
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/* This driver handles a family of multipurpose chips, which incorporate |
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* voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, |
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* and other features often needed in portable devices like cell phones |
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* or digital cameras. |
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* |
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* The tps65011 and tps65013 have different voltage settings compared |
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* to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. |
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* All except tps65010 have "wait" mode, possibly defaulted so that |
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* battery-insert != device-on. |
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* |
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* We could distinguish between some models by checking VDCDC1.UVLO or |
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* other registers, unless they've been changed already after powerup |
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* as part of board setup by a bootloader. |
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*/ |
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enum tps_model { |
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TPS65010, |
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TPS65011, |
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TPS65012, |
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TPS65013, |
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}; |
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struct tps65010 { |
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struct i2c_client *client; |
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struct mutex lock; |
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struct delayed_work work; |
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struct dentry *file; |
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unsigned charging:1; |
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unsigned por:1; |
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unsigned model:8; |
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u16 vbus; |
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unsigned long flags; |
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#define FLAG_VBUS_CHANGED 0 |
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#define FLAG_IRQ_ENABLE 1 |
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/* copies of last register state */ |
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u8 chgstatus, regstatus, chgconf; |
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u8 nmask1, nmask2; |
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u8 outmask; |
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struct gpio_chip chip; |
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struct platform_device *leds; |
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}; |
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#define POWER_POLL_DELAY msecs_to_jiffies(5000) |
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/*-------------------------------------------------------------------------*/ |
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#if defined(DEBUG) || defined(CONFIG_DEBUG_FS) |
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static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) |
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{ |
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snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", |
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chgstatus, |
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(chgstatus & TPS_CHG_USB) ? " USB" : "", |
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(chgstatus & TPS_CHG_AC) ? " AC" : "", |
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(chgstatus & TPS_CHG_THERM) ? " therm" : "", |
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(chgstatus & TPS_CHG_TERM) ? " done" : |
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((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
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? " (charging)" : ""), |
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(chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", |
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(chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", |
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(chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", |
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(chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); |
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} |
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static void dbg_regstat(char *buf, size_t len, u8 regstatus) |
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{ |
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snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", |
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regstatus, |
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(regstatus & TPS_REG_ONOFF) ? "off" : "(on)", |
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(regstatus & TPS_REG_COVER) ? " uncover" : "", |
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(regstatus & TPS_REG_UVLO) ? " UVLO" : "", |
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(regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", |
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(regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "", |
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(regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", |
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(regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", |
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(regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); |
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} |
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static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) |
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{ |
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const char *hibit; |
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if (por) |
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hibit = (chgconfig & TPS_CHARGE_POR) |
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? "POR=69ms" : "POR=1sec"; |
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else |
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hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; |
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snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", |
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chgconfig, hibit, |
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(chgconfig & TPS_CHARGE_RESET) ? " reset" : "", |
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(chgconfig & TPS_CHARGE_FAST) ? " fast" : "", |
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({int p; switch ((chgconfig >> 3) & 3) { |
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case 3: p = 100; break; |
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case 2: p = 75; break; |
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case 1: p = 50; break; |
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default: p = 25; break; |
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}; p; }), |
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(chgconfig & TPS_VBUS_CHARGING) |
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? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) |
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: 0, |
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(chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); |
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} |
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#endif |
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#ifdef DEBUG |
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static void show_chgstatus(const char *label, u8 chgstatus) |
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{ |
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char buf [100]; |
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dbg_chgstat(buf, sizeof buf, chgstatus); |
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pr_debug("%s: %s %s", DRIVER_NAME, label, buf); |
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} |
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static void show_regstatus(const char *label, u8 regstatus) |
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{ |
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char buf [100]; |
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dbg_regstat(buf, sizeof buf, regstatus); |
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pr_debug("%s: %s %s", DRIVER_NAME, label, buf); |
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} |
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static void show_chgconfig(int por, const char *label, u8 chgconfig) |
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{ |
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char buf [100]; |
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dbg_chgconf(por, buf, sizeof buf, chgconfig); |
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pr_debug("%s: %s %s", DRIVER_NAME, label, buf); |
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} |
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#else |
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static inline void show_chgstatus(const char *label, u8 chgstatus) { } |
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static inline void show_regstatus(const char *label, u8 chgstatus) { } |
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static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } |
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#endif |
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#ifdef CONFIG_DEBUG_FS |
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static int dbg_show(struct seq_file *s, void *_) |
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{ |
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struct tps65010 *tps = s->private; |
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u8 value, v2; |
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unsigned i; |
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char buf[100]; |
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const char *chip; |
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switch (tps->model) { |
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case TPS65010: chip = "tps65010"; break; |
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case TPS65011: chip = "tps65011"; break; |
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case TPS65012: chip = "tps65012"; break; |
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case TPS65013: chip = "tps65013"; break; |
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default: chip = NULL; break; |
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} |
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seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", |
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DRIVER_NAME, DRIVER_VERSION, chip); |
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mutex_lock(&tps->lock); |
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/* FIXME how can we tell whether a battery is present? |
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* likely involves a charge gauging chip (like BQ26501). |
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*/ |
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seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); |
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/* registers for monitoring battery charging and status; note |
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* that reading chgstat and regstat may ack IRQs... |
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*/ |
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value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); |
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dbg_chgconf(tps->por, buf, sizeof buf, value); |
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seq_printf(s, "chgconfig %s", buf); |
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value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); |
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dbg_chgstat(buf, sizeof buf, value); |
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seq_printf(s, "chgstat %s", buf); |
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value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1); |
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dbg_chgstat(buf, sizeof buf, value); |
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seq_printf(s, "mask1 %s", buf); |
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/* ignore ackint1 */ |
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value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); |
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dbg_regstat(buf, sizeof buf, value); |
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seq_printf(s, "regstat %s", buf); |
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value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2); |
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dbg_regstat(buf, sizeof buf, value); |
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seq_printf(s, "mask2 %s\n", buf); |
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/* ignore ackint2 */ |
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queue_delayed_work(system_power_efficient_wq, &tps->work, |
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POWER_POLL_DELAY); |
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/* VMAIN voltage, enable lowpower, etc */ |
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value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1); |
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seq_printf(s, "vdcdc1 %02x\n", value); |
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/* VCORE voltage, vibrator on/off */ |
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value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2); |
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seq_printf(s, "vdcdc2 %02x\n", value); |
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/* both LD0s, and their lowpower behavior */ |
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value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1); |
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seq_printf(s, "vregs1 %02x\n\n", value); |
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/* LEDs and GPIOs */ |
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value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON); |
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v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER); |
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seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", |
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(value & 0x80) |
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? ((v2 & 0x80) ? "on" : "off") |
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: ((v2 & 0x80) ? "blink" : "(nPG)"), |
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value, v2, |
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(value & 0x7f) * 10, (v2 & 0x7f) * 100); |
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value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON); |
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v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER); |
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seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", |
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(value & 0x80) |
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? ((v2 & 0x80) ? "on" : "off") |
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: ((v2 & 0x80) ? "blink" : "off"), |
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value, v2, |
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(value & 0x7f) * 10, (v2 & 0x7f) * 100); |
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value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); |
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v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3); |
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seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); |
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for (i = 0; i < 4; i++) { |
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if (value & (1 << (4 + i))) |
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seq_printf(s, " gpio%d-out %s\n", i + 1, |
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(value & (1 << i)) ? "low" : "hi "); |
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else |
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seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, |
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(value & (1 << i)) ? "hi " : "low", |
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(v2 & (1 << i)) ? "no-irq" : "irq", |
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(v2 & (1 << (4 + i))) ? "rising" : "falling"); |
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} |
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mutex_unlock(&tps->lock); |
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return 0; |
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} |
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static int dbg_tps_open(struct inode *inode, struct file *file) |
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{ |
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return single_open(file, dbg_show, inode->i_private); |
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} |
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static const struct file_operations debug_fops = { |
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.open = dbg_tps_open, |
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.read = seq_read, |
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.llseek = seq_lseek, |
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.release = single_release, |
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}; |
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#define DEBUG_FOPS &debug_fops |
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#else |
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#define DEBUG_FOPS NULL |
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#endif |
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/*-------------------------------------------------------------------------*/ |
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/* handle IRQS in a task context, so we can use I2C calls */ |
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static void tps65010_interrupt(struct tps65010 *tps) |
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{ |
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u8 tmp = 0, mask, poll; |
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/* IRQs won't trigger for certain events, but we can get |
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* others by polling (normally, with external power applied). |
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*/ |
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poll = 0; |
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/* regstatus irqs */ |
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if (tps->nmask2) { |
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tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); |
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mask = tmp ^ tps->regstatus; |
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tps->regstatus = tmp; |
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mask &= tps->nmask2; |
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} else |
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mask = 0; |
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if (mask) { |
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tps->regstatus = tmp; |
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/* may need to shut something down ... */ |
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/* "off" usually means deep sleep */ |
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if (tmp & TPS_REG_ONOFF) { |
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pr_info("%s: power off button\n", DRIVER_NAME); |
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#if 0 |
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/* REVISIT: this might need its own workqueue |
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* plus tweaks including deadlock avoidance ... |
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* also needs to get error handling and probably |
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* an #ifdef CONFIG_HIBERNATION |
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*/ |
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hibernate(); |
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#endif |
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poll = 1; |
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} |
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} |
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/* chgstatus irqs */ |
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if (tps->nmask1) { |
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tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); |
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mask = tmp ^ tps->chgstatus; |
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tps->chgstatus = tmp; |
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mask &= tps->nmask1; |
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} else |
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mask = 0; |
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if (mask) { |
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unsigned charging = 0; |
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show_chgstatus("chg/irq", tmp); |
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if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) |
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show_chgconfig(tps->por, "conf", tps->chgconf); |
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|
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/* Unless it was turned off or disabled, we charge any |
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* battery whenever there's power available for it |
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* and the charger hasn't been disabled. |
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*/ |
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if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) |
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&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
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&& (tps->chgconf & TPS_CHARGE_ENABLE) |
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) { |
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if (tps->chgstatus & TPS_CHG_USB) { |
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/* VBUS options are readonly until reconnect */ |
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if (mask & TPS_CHG_USB) |
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set_bit(FLAG_VBUS_CHANGED, &tps->flags); |
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charging = 1; |
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} else if (tps->chgstatus & TPS_CHG_AC) |
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charging = 1; |
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} |
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if (charging != tps->charging) { |
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tps->charging = charging; |
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pr_info("%s: battery %scharging\n", |
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DRIVER_NAME, charging ? "" : |
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((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
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? "NOT " : "dis")); |
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} |
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} |
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/* always poll to detect (a) power removal, without tps65013 |
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* NO_CHG IRQ; or (b) restart of charging after stop. |
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*/ |
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if ((tps->model != TPS65013 || !tps->charging) |
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&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) |
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poll = 1; |
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if (poll) |
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queue_delayed_work(system_power_efficient_wq, &tps->work, |
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POWER_POLL_DELAY); |
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|
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/* also potentially gpio-in rise or fall */ |
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} |
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|
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/* handle IRQs and polling using keventd for now */ |
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static void tps65010_work(struct work_struct *work) |
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{ |
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struct tps65010 *tps; |
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tps = container_of(to_delayed_work(work), struct tps65010, work); |
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mutex_lock(&tps->lock); |
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tps65010_interrupt(tps); |
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if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { |
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u8 chgconfig, tmp; |
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chgconfig = i2c_smbus_read_byte_data(tps->client, |
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TPS_CHGCONFIG); |
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chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); |
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if (tps->vbus == 500) |
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chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; |
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else if (tps->vbus >= 100) |
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chgconfig |= TPS_VBUS_CHARGING; |
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i2c_smbus_write_byte_data(tps->client, |
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TPS_CHGCONFIG, chgconfig); |
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|
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/* vbus update fails unless VBUS is connected! */ |
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tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); |
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tps->chgconf = tmp; |
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show_chgconfig(tps->por, "update vbus", tmp); |
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} |
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|
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if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) |
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enable_irq(tps->client->irq); |
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|
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mutex_unlock(&tps->lock); |
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} |
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static irqreturn_t tps65010_irq(int irq, void *_tps) |
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{ |
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struct tps65010 *tps = _tps; |
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|
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disable_irq_nosync(irq); |
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set_bit(FLAG_IRQ_ENABLE, &tps->flags); |
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queue_delayed_work(system_power_efficient_wq, &tps->work, 0); |
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return IRQ_HANDLED; |
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} |
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|
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/*-------------------------------------------------------------------------*/ |
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|
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/* offsets 0..3 == GPIO1..GPIO4 |
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* offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) |
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* offset 6 == vibrator motor driver |
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*/ |
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static void |
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tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
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{ |
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if (offset < 4) |
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tps65010_set_gpio_out_value(offset + 1, value); |
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else if (offset < 6) |
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tps65010_set_led(offset - 3, value ? ON : OFF); |
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else |
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tps65010_set_vib(value); |
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} |
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|
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static int |
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tps65010_output(struct gpio_chip *chip, unsigned offset, int value) |
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{ |
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/* GPIOs may be input-only */ |
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if (offset < 4) { |
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struct tps65010 *tps; |
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|
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tps = gpiochip_get_data(chip); |
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if (!(tps->outmask & (1 << offset))) |
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return -EINVAL; |
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tps65010_set_gpio_out_value(offset + 1, value); |
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} else if (offset < 6) |
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tps65010_set_led(offset - 3, value ? ON : OFF); |
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else |
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tps65010_set_vib(value); |
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|
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return 0; |
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} |
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|
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static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) |
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{ |
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int value; |
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struct tps65010 *tps; |
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|
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tps = gpiochip_get_data(chip); |
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|
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if (offset < 4) { |
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value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); |
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if (value < 0) |
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return value; |
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if (value & (1 << (offset + 4))) /* output */ |
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return !(value & (1 << offset)); |
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else /* input */ |
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return !!(value & (1 << offset)); |
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} |
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|
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/* REVISIT we *could* report LED1/nPG and LED2 state ... */ |
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return 0; |
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} |
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|
|
|
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/*-------------------------------------------------------------------------*/ |
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|
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static struct tps65010 *the_tps; |
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|
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static int tps65010_remove(struct i2c_client *client) |
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{ |
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struct tps65010 *tps = i2c_get_clientdata(client); |
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struct tps65010_board *board = dev_get_platdata(&client->dev); |
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|
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if (board && board->teardown) { |
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int status = board->teardown(client, board->context); |
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if (status < 0) |
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dev_dbg(&client->dev, "board %s %s err %d\n", |
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"teardown", client->name, status); |
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} |
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if (client->irq > 0) |
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free_irq(client->irq, tps); |
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cancel_delayed_work_sync(&tps->work); |
|
debugfs_remove(tps->file); |
|
the_tps = NULL; |
|
return 0; |
|
} |
|
|
|
static int tps65010_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct tps65010 *tps; |
|
int status; |
|
struct tps65010_board *board = dev_get_platdata(&client->dev); |
|
|
|
if (the_tps) { |
|
dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
|
return -EINVAL; |
|
|
|
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); |
|
if (!tps) |
|
return -ENOMEM; |
|
|
|
mutex_init(&tps->lock); |
|
INIT_DELAYED_WORK(&tps->work, tps65010_work); |
|
tps->client = client; |
|
tps->model = id->driver_data; |
|
|
|
/* the IRQ is active low, but many gpio lines can't support that |
|
* so this driver uses falling-edge triggers instead. |
|
*/ |
|
if (client->irq > 0) { |
|
status = request_irq(client->irq, tps65010_irq, |
|
IRQF_TRIGGER_FALLING, DRIVER_NAME, tps); |
|
if (status < 0) { |
|
dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", |
|
client->irq, status); |
|
return status; |
|
} |
|
/* annoying race here, ideally we'd have an option |
|
* to claim the irq now and enable it later. |
|
* FIXME genirq IRQF_NOAUTOEN now solves that ... |
|
*/ |
|
disable_irq(client->irq); |
|
set_bit(FLAG_IRQ_ENABLE, &tps->flags); |
|
} else |
|
dev_warn(&client->dev, "IRQ not configured!\n"); |
|
|
|
|
|
switch (tps->model) { |
|
case TPS65010: |
|
case TPS65012: |
|
tps->por = 1; |
|
break; |
|
/* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ |
|
} |
|
tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); |
|
show_chgconfig(tps->por, "conf/init", tps->chgconf); |
|
|
|
show_chgstatus("chg/init", |
|
i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); |
|
show_regstatus("reg/init", |
|
i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); |
|
|
|
pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(client, TPS_VDCDC1), |
|
i2c_smbus_read_byte_data(client, TPS_VDCDC2), |
|
i2c_smbus_read_byte_data(client, TPS_VREGS1)); |
|
pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(client, TPS_DEFGPIO), |
|
i2c_smbus_read_byte_data(client, TPS_MASK3)); |
|
|
|
i2c_set_clientdata(client, tps); |
|
the_tps = tps; |
|
|
|
#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) |
|
/* USB hosts can't draw VBUS. OTG devices could, later |
|
* when OTG infrastructure enables it. USB peripherals |
|
* could be relying on VBUS while booting, though. |
|
*/ |
|
tps->vbus = 100; |
|
#endif |
|
|
|
/* unmask the "interesting" irqs, then poll once to |
|
* kickstart monitoring, initialize shadowed status |
|
* registers, and maybe disable VBUS draw. |
|
*/ |
|
tps->nmask1 = ~0; |
|
(void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); |
|
|
|
tps->nmask2 = TPS_REG_ONOFF; |
|
if (tps->model == TPS65013) |
|
tps->nmask2 |= TPS_REG_NO_CHG; |
|
(void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); |
|
|
|
(void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f |
|
| i2c_smbus_read_byte_data(client, TPS_MASK3)); |
|
|
|
tps65010_work(&tps->work.work); |
|
|
|
tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, |
|
tps, DEBUG_FOPS); |
|
|
|
/* optionally register GPIOs */ |
|
if (board && board->base != 0) { |
|
tps->outmask = board->outmask; |
|
|
|
tps->chip.label = client->name; |
|
tps->chip.parent = &client->dev; |
|
tps->chip.owner = THIS_MODULE; |
|
|
|
tps->chip.set = tps65010_gpio_set; |
|
tps->chip.direction_output = tps65010_output; |
|
|
|
/* NOTE: only partial support for inputs; nyet IRQs */ |
|
tps->chip.get = tps65010_gpio_get; |
|
|
|
tps->chip.base = board->base; |
|
tps->chip.ngpio = 7; |
|
tps->chip.can_sleep = 1; |
|
|
|
status = gpiochip_add_data(&tps->chip, tps); |
|
if (status < 0) |
|
dev_err(&client->dev, "can't add gpiochip, err %d\n", |
|
status); |
|
else if (board->setup) { |
|
status = board->setup(client, board->context); |
|
if (status < 0) { |
|
dev_dbg(&client->dev, |
|
"board %s %s err %d\n", |
|
"setup", client->name, status); |
|
status = 0; |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id tps65010_id[] = { |
|
{ "tps65010", TPS65010 }, |
|
{ "tps65011", TPS65011 }, |
|
{ "tps65012", TPS65012 }, |
|
{ "tps65013", TPS65013 }, |
|
{ "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */ |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, tps65010_id); |
|
|
|
static struct i2c_driver tps65010_driver = { |
|
.driver = { |
|
.name = "tps65010", |
|
}, |
|
.probe = tps65010_probe, |
|
.remove = tps65010_remove, |
|
.id_table = tps65010_id, |
|
}; |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
/* Draw from VBUS: |
|
* 0 mA -- DON'T DRAW (might supply power instead) |
|
* 100 mA -- usb unit load (slowest charge rate) |
|
* 500 mA -- usb high power (fast battery charge) |
|
*/ |
|
int tps65010_set_vbus_draw(unsigned mA) |
|
{ |
|
unsigned long flags; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
|
|
/* assumes non-SMP */ |
|
local_irq_save(flags); |
|
if (mA >= 500) |
|
mA = 500; |
|
else if (mA >= 100) |
|
mA = 100; |
|
else |
|
mA = 0; |
|
the_tps->vbus = mA; |
|
if ((the_tps->chgstatus & TPS_CHG_USB) |
|
&& test_and_set_bit( |
|
FLAG_VBUS_CHANGED, &the_tps->flags)) { |
|
/* gadget drivers call this in_irq() */ |
|
queue_delayed_work(system_power_efficient_wq, &the_tps->work, |
|
0); |
|
} |
|
local_irq_restore(flags); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(tps65010_set_vbus_draw); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
/* tps65010_set_gpio_out_value parameter: |
|
* gpio: GPIO1, GPIO2, GPIO3 or GPIO4 |
|
* value: LOW or HIGH |
|
*/ |
|
int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) |
|
{ |
|
int status; |
|
unsigned defgpio; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
if ((gpio < GPIO1) || (gpio > GPIO4)) |
|
return -EINVAL; |
|
|
|
mutex_lock(&the_tps->lock); |
|
|
|
defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); |
|
|
|
/* Configure GPIO for output */ |
|
defgpio |= 1 << (gpio + 3); |
|
|
|
/* Writing 1 forces a logic 0 on that GPIO and vice versa */ |
|
switch (value) { |
|
case LOW: |
|
defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ |
|
break; |
|
/* case HIGH: */ |
|
default: |
|
defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ |
|
break; |
|
} |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_DEFGPIO, defgpio); |
|
|
|
pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, |
|
gpio, value ? "high" : "low", |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65010_set_gpio_out_value); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
/* tps65010_set_led parameter: |
|
* led: LED1 or LED2 |
|
* mode: ON, OFF or BLINK |
|
*/ |
|
int tps65010_set_led(unsigned led, unsigned mode) |
|
{ |
|
int status; |
|
unsigned led_on, led_per, offs; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
|
|
if (led == LED1) |
|
offs = 0; |
|
else { |
|
offs = 2; |
|
led = LED2; |
|
} |
|
|
|
mutex_lock(&the_tps->lock); |
|
|
|
pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
|
i2c_smbus_read_byte_data(the_tps->client, |
|
TPS_LED1_ON + offs)); |
|
|
|
pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
|
i2c_smbus_read_byte_data(the_tps->client, |
|
TPS_LED1_PER + offs)); |
|
|
|
switch (mode) { |
|
case OFF: |
|
led_on = 1 << 7; |
|
led_per = 0 << 7; |
|
break; |
|
case ON: |
|
led_on = 1 << 7; |
|
led_per = 1 << 7; |
|
break; |
|
case BLINK: |
|
led_on = 0x30 | (0 << 7); |
|
led_per = 0x08 | (1 << 7); |
|
break; |
|
default: |
|
printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", |
|
DRIVER_NAME); |
|
mutex_unlock(&the_tps->lock); |
|
return -EINVAL; |
|
} |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_LED1_ON + offs, led_on); |
|
|
|
if (status != 0) { |
|
printk(KERN_ERR "%s: Failed to write led%i_on register\n", |
|
DRIVER_NAME, led); |
|
mutex_unlock(&the_tps->lock); |
|
return status; |
|
} |
|
|
|
pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_LED1_PER + offs, led_per); |
|
|
|
if (status != 0) { |
|
printk(KERN_ERR "%s: Failed to write led%i_per register\n", |
|
DRIVER_NAME, led); |
|
mutex_unlock(&the_tps->lock); |
|
return status; |
|
} |
|
|
|
pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
|
i2c_smbus_read_byte_data(the_tps->client, |
|
TPS_LED1_PER + offs)); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
|
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65010_set_led); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
/* tps65010_set_vib parameter: |
|
* value: ON or OFF |
|
*/ |
|
int tps65010_set_vib(unsigned value) |
|
{ |
|
int status; |
|
unsigned vdcdc2; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
|
|
mutex_lock(&the_tps->lock); |
|
|
|
vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); |
|
vdcdc2 &= ~(1 << 1); |
|
if (value) |
|
vdcdc2 |= (1 << 1); |
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_VDCDC2, vdcdc2); |
|
|
|
pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65010_set_vib); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
/* tps65010_set_low_pwr parameter: |
|
* mode: ON or OFF |
|
*/ |
|
int tps65010_set_low_pwr(unsigned mode) |
|
{ |
|
int status; |
|
unsigned vdcdc1; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
|
|
mutex_lock(&the_tps->lock); |
|
|
|
pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, |
|
mode ? "enable" : "disable", |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
|
|
|
vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); |
|
|
|
switch (mode) { |
|
case OFF: |
|
vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ |
|
break; |
|
/* case ON: */ |
|
default: |
|
vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ |
|
break; |
|
} |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_VDCDC1, vdcdc1); |
|
|
|
if (status != 0) |
|
printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", |
|
DRIVER_NAME); |
|
else |
|
pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
|
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65010_set_low_pwr); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
/* tps65010_config_vregs1 parameter: |
|
* value to be written to VREGS1 register |
|
* Note: The complete register is written, set all bits you need |
|
*/ |
|
int tps65010_config_vregs1(unsigned value) |
|
{ |
|
int status; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
|
|
mutex_lock(&the_tps->lock); |
|
|
|
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_VREGS1, value); |
|
|
|
if (status != 0) |
|
printk(KERN_ERR "%s: Failed to write vregs1 register\n", |
|
DRIVER_NAME); |
|
else |
|
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
|
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65010_config_vregs1); |
|
|
|
int tps65010_config_vdcdc2(unsigned value) |
|
{ |
|
struct i2c_client *c; |
|
int status; |
|
|
|
if (!the_tps) |
|
return -ENODEV; |
|
|
|
c = the_tps->client; |
|
mutex_lock(&the_tps->lock); |
|
|
|
pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(c, TPS_VDCDC2)); |
|
|
|
status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value); |
|
|
|
if (status != 0) |
|
printk(KERN_ERR "%s: Failed to write vdcdc2 register\n", |
|
DRIVER_NAME); |
|
else |
|
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(c, TPS_VDCDC2)); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65010_config_vdcdc2); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
/* tps65013_set_low_pwr parameter: |
|
* mode: ON or OFF |
|
*/ |
|
|
|
/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not |
|
required if power supply is through a battery */ |
|
|
|
int tps65013_set_low_pwr(unsigned mode) |
|
{ |
|
int status; |
|
unsigned vdcdc1, chgconfig; |
|
|
|
if (!the_tps || the_tps->por) |
|
return -ENODEV; |
|
|
|
mutex_lock(&the_tps->lock); |
|
|
|
pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", |
|
DRIVER_NAME, |
|
mode ? "enable" : "disable", |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
|
|
|
chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); |
|
vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); |
|
|
|
switch (mode) { |
|
case OFF: |
|
chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ |
|
vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ |
|
break; |
|
/* case ON: */ |
|
default: |
|
chgconfig |= TPS65013_AUA; /* enable AUA bit */ |
|
vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ |
|
break; |
|
} |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_CHGCONFIG, chgconfig); |
|
if (status != 0) { |
|
printk(KERN_ERR "%s: Failed to write chconfig register\n", |
|
DRIVER_NAME); |
|
mutex_unlock(&the_tps->lock); |
|
return status; |
|
} |
|
|
|
chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); |
|
the_tps->chgconf = chgconfig; |
|
show_chgconfig(0, "chgconf", chgconfig); |
|
|
|
status = i2c_smbus_write_byte_data(the_tps->client, |
|
TPS_VDCDC1, vdcdc1); |
|
|
|
if (status != 0) |
|
printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", |
|
DRIVER_NAME); |
|
else |
|
pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, |
|
i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
|
|
|
mutex_unlock(&the_tps->lock); |
|
|
|
return status; |
|
} |
|
EXPORT_SYMBOL(tps65013_set_low_pwr); |
|
|
|
/*-------------------------------------------------------------------------*/ |
|
|
|
static int __init tps_init(void) |
|
{ |
|
return i2c_add_driver(&tps65010_driver); |
|
} |
|
/* NOTE: this MUST be initialized before the other parts of the system |
|
* that rely on it ... but after the i2c bus on which this relies. |
|
* That is, much earlier than on PC-type systems, which don't often use |
|
* I2C as a core system bus. |
|
*/ |
|
subsys_initcall(tps_init); |
|
|
|
static void __exit tps_exit(void) |
|
{ |
|
i2c_del_driver(&tps65010_driver); |
|
} |
|
module_exit(tps_exit); |
|
|
|
|