2019-06-04 15:11:33 +07:00
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// SPDX-License-Identifier: GPL-2.0-only
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2010-02-28 18:47:49 +07:00
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/*
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* Battery measurement code for Zipit Z2
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*
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* Copyright (C) 2009 Peter Edwards <sweetlilmre@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/gpio.h>
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2010-06-03 08:44:00 +07:00
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#include <linux/i2c.h>
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2010-02-28 18:47:49 +07:00
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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2010-06-03 08:44:00 +07:00
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#include <linux/power_supply.h>
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#include <linux/slab.h>
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2010-02-28 18:47:49 +07:00
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#include <linux/z2_battery.h>
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#define Z2_DEFAULT_NAME "Z2"
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struct z2_charger {
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2015-03-12 14:44:11 +07:00
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struct z2_battery_info *info;
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int bat_status;
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struct i2c_client *client;
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struct power_supply *batt_ps;
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struct power_supply_desc batt_ps_desc;
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struct mutex work_lock;
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struct work_struct bat_work;
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2010-02-28 18:47:49 +07:00
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};
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static unsigned long z2_read_bat(struct z2_charger *charger)
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{
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int data;
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data = i2c_smbus_read_byte_data(charger->client,
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charger->info->batt_I2C_reg);
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if (data < 0)
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return 0;
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return data * charger->info->batt_mult / charger->info->batt_div;
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}
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static int z2_batt_get_property(struct power_supply *batt_ps,
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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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2015-03-12 14:44:11 +07:00
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struct z2_charger *charger = power_supply_get_drvdata(batt_ps);
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2010-02-28 18:47:49 +07:00
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struct z2_battery_info *info = charger->info;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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val->intval = charger->bat_status;
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break;
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case POWER_SUPPLY_PROP_TECHNOLOGY:
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val->intval = info->batt_tech;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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if (info->batt_I2C_reg >= 0)
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val->intval = z2_read_bat(charger);
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX:
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if (info->max_voltage >= 0)
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val->intval = info->max_voltage;
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN:
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if (info->min_voltage >= 0)
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val->intval = info->min_voltage;
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else
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return -EINVAL;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = 1;
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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 z2_batt_ext_power_changed(struct power_supply *batt_ps)
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{
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2015-03-12 14:44:11 +07:00
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struct z2_charger *charger = power_supply_get_drvdata(batt_ps);
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2010-02-28 18:47:49 +07:00
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schedule_work(&charger->bat_work);
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}
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static void z2_batt_update(struct z2_charger *charger)
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{
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int old_status = charger->bat_status;
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struct z2_battery_info *info;
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info = charger->info;
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mutex_lock(&charger->work_lock);
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charger->bat_status = (info->charge_gpio >= 0) ?
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(gpio_get_value(info->charge_gpio) ?
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POWER_SUPPLY_STATUS_CHARGING :
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POWER_SUPPLY_STATUS_DISCHARGING) :
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POWER_SUPPLY_STATUS_UNKNOWN;
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if (old_status != charger->bat_status) {
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2015-03-12 14:44:11 +07:00
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pr_debug("%s: %i -> %i\n", charger->batt_ps->desc->name,
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old_status,
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charger->bat_status);
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power_supply_changed(charger->batt_ps);
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2010-02-28 18:47:49 +07:00
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}
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mutex_unlock(&charger->work_lock);
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}
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static void z2_batt_work(struct work_struct *work)
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{
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struct z2_charger *charger;
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charger = container_of(work, struct z2_charger, bat_work);
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z2_batt_update(charger);
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}
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static irqreturn_t z2_charge_switch_irq(int irq, void *devid)
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{
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struct z2_charger *charger = devid;
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schedule_work(&charger->bat_work);
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return IRQ_HANDLED;
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}
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static int z2_batt_ps_init(struct z2_charger *charger, int props)
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{
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int i = 0;
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enum power_supply_property *prop;
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struct z2_battery_info *info = charger->info;
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2011-03-11 20:09:32 +07:00
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if (info->charge_gpio >= 0)
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props++; /* POWER_SUPPLY_PROP_STATUS */
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2010-02-28 18:47:49 +07:00
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if (info->batt_tech >= 0)
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props++; /* POWER_SUPPLY_PROP_TECHNOLOGY */
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if (info->batt_I2C_reg >= 0)
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props++; /* POWER_SUPPLY_PROP_VOLTAGE_NOW */
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if (info->max_voltage >= 0)
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props++; /* POWER_SUPPLY_PROP_VOLTAGE_MAX */
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if (info->min_voltage >= 0)
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props++; /* POWER_SUPPLY_PROP_VOLTAGE_MIN */
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treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
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kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
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kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
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kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
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kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
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kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
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- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
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kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
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kzalloc(sizeof(TYPE) * C2, ...)
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kzalloc(C1 * C2 * C3, ...)
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kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 04:03:40 +07:00
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prop = kcalloc(props, sizeof(*prop), GFP_KERNEL);
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2010-02-28 18:47:49 +07:00
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if (!prop)
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return -ENOMEM;
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prop[i++] = POWER_SUPPLY_PROP_PRESENT;
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if (info->charge_gpio >= 0)
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prop[i++] = POWER_SUPPLY_PROP_STATUS;
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if (info->batt_tech >= 0)
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prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY;
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if (info->batt_I2C_reg >= 0)
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prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW;
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if (info->max_voltage >= 0)
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prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX;
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if (info->min_voltage >= 0)
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prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN;
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if (!info->batt_name) {
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dev_info(&charger->client->dev,
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"Please consider setting proper battery "
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"name in platform definition file, falling "
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"back to name \" Z2_DEFAULT_NAME \"\n");
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2015-03-12 14:44:11 +07:00
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charger->batt_ps_desc.name = Z2_DEFAULT_NAME;
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2010-02-28 18:47:49 +07:00
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} else
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2015-03-12 14:44:11 +07:00
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charger->batt_ps_desc.name = info->batt_name;
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2010-02-28 18:47:49 +07:00
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2015-03-12 14:44:11 +07:00
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charger->batt_ps_desc.properties = prop;
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charger->batt_ps_desc.num_properties = props;
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charger->batt_ps_desc.type = POWER_SUPPLY_TYPE_BATTERY;
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charger->batt_ps_desc.get_property = z2_batt_get_property;
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charger->batt_ps_desc.external_power_changed =
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z2_batt_ext_power_changed;
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charger->batt_ps_desc.use_for_apm = 1;
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2010-02-28 18:47:49 +07:00
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return 0;
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}
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2012-11-20 01:22:23 +07:00
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static int z2_batt_probe(struct i2c_client *client,
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2010-02-28 18:47:49 +07:00
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const struct i2c_device_id *id)
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{
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int ret = 0;
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int props = 1; /* POWER_SUPPLY_PROP_PRESENT */
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struct z2_charger *charger;
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struct z2_battery_info *info = client->dev.platform_data;
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2015-03-12 14:44:11 +07:00
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struct power_supply_config psy_cfg = {};
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2010-02-28 18:47:49 +07:00
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if (info == NULL) {
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dev_err(&client->dev,
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"Please set platform device platform_data"
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" to a valid z2_battery_info pointer!\n");
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return -EINVAL;
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}
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charger = kzalloc(sizeof(*charger), GFP_KERNEL);
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if (charger == NULL)
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return -ENOMEM;
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charger->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
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charger->info = info;
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charger->client = client;
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i2c_set_clientdata(client, charger);
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2015-03-12 14:44:11 +07:00
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psy_cfg.drv_data = charger;
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2010-02-28 18:47:49 +07:00
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mutex_init(&charger->work_lock);
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if (info->charge_gpio >= 0 && gpio_is_valid(info->charge_gpio)) {
|
|
|
|
ret = gpio_request(info->charge_gpio, "BATT CHRG");
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
ret = gpio_direction_input(info->charge_gpio);
|
|
|
|
if (ret)
|
|
|
|
goto err2;
|
|
|
|
|
2011-03-28 22:49:12 +07:00
|
|
|
irq_set_irq_type(gpio_to_irq(info->charge_gpio),
|
|
|
|
IRQ_TYPE_EDGE_BOTH);
|
2010-02-28 18:47:49 +07:00
|
|
|
ret = request_irq(gpio_to_irq(info->charge_gpio),
|
2011-09-22 15:59:11 +07:00
|
|
|
z2_charge_switch_irq, 0,
|
2010-02-28 18:47:49 +07:00
|
|
|
"AC Detect", charger);
|
|
|
|
if (ret)
|
|
|
|
goto err3;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = z2_batt_ps_init(charger, props);
|
|
|
|
if (ret)
|
|
|
|
goto err3;
|
|
|
|
|
|
|
|
INIT_WORK(&charger->bat_work, z2_batt_work);
|
|
|
|
|
2015-03-12 14:44:11 +07:00
|
|
|
charger->batt_ps = power_supply_register(&client->dev,
|
|
|
|
&charger->batt_ps_desc,
|
|
|
|
&psy_cfg);
|
|
|
|
if (IS_ERR(charger->batt_ps)) {
|
|
|
|
ret = PTR_ERR(charger->batt_ps);
|
2010-02-28 18:47:49 +07:00
|
|
|
goto err4;
|
2015-03-12 14:44:11 +07:00
|
|
|
}
|
2010-02-28 18:47:49 +07:00
|
|
|
|
|
|
|
schedule_work(&charger->bat_work);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err4:
|
2015-03-12 14:44:11 +07:00
|
|
|
kfree(charger->batt_ps_desc.properties);
|
2010-02-28 18:47:49 +07:00
|
|
|
err3:
|
|
|
|
if (info->charge_gpio >= 0 && gpio_is_valid(info->charge_gpio))
|
|
|
|
free_irq(gpio_to_irq(info->charge_gpio), charger);
|
|
|
|
err2:
|
|
|
|
if (info->charge_gpio >= 0 && gpio_is_valid(info->charge_gpio))
|
|
|
|
gpio_free(info->charge_gpio);
|
|
|
|
err:
|
|
|
|
kfree(charger);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-11-20 01:26:07 +07:00
|
|
|
static int z2_batt_remove(struct i2c_client *client)
|
2010-02-28 18:47:49 +07:00
|
|
|
{
|
|
|
|
struct z2_charger *charger = i2c_get_clientdata(client);
|
|
|
|
struct z2_battery_info *info = charger->info;
|
|
|
|
|
2010-12-11 23:51:45 +07:00
|
|
|
cancel_work_sync(&charger->bat_work);
|
2015-03-12 14:44:11 +07:00
|
|
|
power_supply_unregister(charger->batt_ps);
|
2010-02-28 18:47:49 +07:00
|
|
|
|
2015-03-12 14:44:11 +07:00
|
|
|
kfree(charger->batt_ps_desc.properties);
|
2010-02-28 18:47:49 +07:00
|
|
|
if (info->charge_gpio >= 0 && gpio_is_valid(info->charge_gpio)) {
|
|
|
|
free_irq(gpio_to_irq(info->charge_gpio), charger);
|
|
|
|
gpio_free(info->charge_gpio);
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(charger);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM
|
2011-04-11 06:40:13 +07:00
|
|
|
static int z2_batt_suspend(struct device *dev)
|
2010-02-28 18:47:49 +07:00
|
|
|
{
|
2011-04-11 06:40:13 +07:00
|
|
|
struct i2c_client *client = to_i2c_client(dev);
|
2010-12-11 23:51:45 +07:00
|
|
|
struct z2_charger *charger = i2c_get_clientdata(client);
|
|
|
|
|
2012-08-21 04:51:24 +07:00
|
|
|
flush_work(&charger->bat_work);
|
2010-02-28 18:47:49 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-04-11 06:40:13 +07:00
|
|
|
static int z2_batt_resume(struct device *dev)
|
2010-02-28 18:47:49 +07:00
|
|
|
{
|
2011-04-11 06:40:13 +07:00
|
|
|
struct i2c_client *client = to_i2c_client(dev);
|
2010-02-28 18:47:49 +07:00
|
|
|
struct z2_charger *charger = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
schedule_work(&charger->bat_work);
|
|
|
|
return 0;
|
|
|
|
}
|
2011-04-11 06:40:13 +07:00
|
|
|
|
|
|
|
static const struct dev_pm_ops z2_battery_pm_ops = {
|
|
|
|
.suspend = z2_batt_suspend,
|
|
|
|
.resume = z2_batt_resume,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define Z2_BATTERY_PM_OPS (&z2_battery_pm_ops)
|
|
|
|
|
2010-02-28 18:47:49 +07:00
|
|
|
#else
|
2011-04-11 06:40:13 +07:00
|
|
|
#define Z2_BATTERY_PM_OPS (NULL)
|
2010-02-28 18:47:49 +07:00
|
|
|
#endif
|
|
|
|
|
|
|
|
static const struct i2c_device_id z2_batt_id[] = {
|
|
|
|
{ "aer915", 0 },
|
|
|
|
{ }
|
|
|
|
};
|
2011-03-01 16:24:34 +07:00
|
|
|
MODULE_DEVICE_TABLE(i2c, z2_batt_id);
|
2010-02-28 18:47:49 +07:00
|
|
|
|
|
|
|
static struct i2c_driver z2_batt_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "z2-battery",
|
2011-04-11 06:40:13 +07:00
|
|
|
.pm = Z2_BATTERY_PM_OPS
|
2010-02-28 18:47:49 +07:00
|
|
|
},
|
|
|
|
.probe = z2_batt_probe,
|
2012-11-20 01:20:40 +07:00
|
|
|
.remove = z2_batt_remove,
|
2010-02-28 18:47:49 +07:00
|
|
|
.id_table = z2_batt_id,
|
|
|
|
};
|
2012-01-21 13:42:54 +07:00
|
|
|
module_i2c_driver(z2_batt_driver);
|
2010-02-28 18:47:49 +07:00
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_AUTHOR("Peter Edwards <sweetlilmre@gmail.com>");
|
|
|
|
MODULE_DESCRIPTION("Zipit Z2 battery driver");
|