linux_dsm_epyc7002/arch/x86/platform/olpc/olpc-xo1-sci.c
Krzysztof Kozlowski 297d716f62 power_supply: Change ownership from driver to core
Change the ownership of power_supply structure from each driver
implementing the class to the power supply core.

The patch changes power_supply_register() function thus all drivers
implementing power supply class are adjusted.

Each driver provides the implementation of power supply. However it
should not be the owner of power supply class instance because it is
exposed by core to other subsystems with power_supply_get_by_name().
These other subsystems have no knowledge when the driver will unregister
the power supply. This leads to several issues when driver is unbound -
mostly because user of power supply accesses freed memory.

Instead let the core own the instance of struct 'power_supply'.  Other
users of this power supply will still access valid memory because it
will be freed when device reference count reaches 0. Currently this
means "it will leak" but power_supply_put() call in next patches will
solve it.

This solves invalid memory references in following race condition
scenario:

Thread 1: charger manager
Thread 2: power supply driver, used by charger manager

THREAD 1 (charger manager)         THREAD 2 (power supply driver)
==========================         ==============================
psy = power_supply_get_by_name()
                                   Driver unbind, .remove
                                     power_supply_unregister()
                                     Device fully removed
psy->get_property()

The 'get_property' call is executed in invalid context because the driver was
unbound and struct 'power_supply' memory was freed.

This could be observed easily with charger manager driver (here compiled
with max17040 fuel gauge):

$ cat /sys/devices/virtual/power_supply/cm-battery/capacity &
$ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind
[   55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[   55.732584] pgd = d98d4000
[   55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000
[   55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
[   55.746210] Modules linked in:
[   55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G        W       3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496
[   55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[   55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000
[   55.771647] PC is at 0x0
[   55.774182] LR is at charger_get_property+0x2f4/0x36c
[   55.779201] pc : [<00000000>]    lr : [<c034b0b4>]    psr: 60000013
[   55.779201] sp : daf55e90  ip : 00000003  fp : 00000000
[   55.790657] r10: 00000000  r9 : c06e2878  r8 : d9b26c68
[   55.795865] r7 : dad81610  r6 : daec7410  r5 : daf55ebc  r4 : 00000000
[   55.802367] r3 : 00000000  r2 : daf55ebc  r1 : 0000002a  r0 : d9b26c68
[   55.808879] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   55.815994] Control: 10c5387d  Table: 598d406a  DAC: 00000015
[   55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210)
[   55.827451] Stack: (0xdaf55e90 to 0xdaf56000)
[   55.831795] 5e80:                                     60000013 c01459c4 0000002a c06f8ef8
[   55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4
[   55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80
[   55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001
[   55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000
[   55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000
[   55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124
[   55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550
[   55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364
[   55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c
[   55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000
[   55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000
[   55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c)
[   55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48)
[   55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104)
[   55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28)
[   55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484)
[   55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c)
[   55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100)
[   55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c)
[   55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48)
[   56.000626] Code: bad PC value
[   56.011652] ---[ end trace 7b64343fbdae8ef1 ]---

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

[for the nvec part]
Reviewed-by: Marc Dietrich <marvin24@gmx.de>

[for compal-laptop.c]
Acked-by: Darren Hart <dvhart@linux.intel.com>

[for the mfd part]
Acked-by: Lee Jones <lee.jones@linaro.org>

[for the hid part]
Acked-by: Jiri Kosina <jkosina@suse.cz>

[for the acpi part]
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-13 23:15:51 +01:00

643 lines
15 KiB
C

/*
* Support for OLPC XO-1 System Control Interrupts (SCI)
*
* Copyright (C) 2010 One Laptop per Child
* Copyright (C) 2006 Red Hat, Inc.
* Copyright (C) 2006 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/cs5535.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_wakeup.h>
#include <linux/mfd/core.h>
#include <linux/power_supply.h>
#include <linux/suspend.h>
#include <linux/workqueue.h>
#include <linux/olpc-ec.h>
#include <asm/io.h>
#include <asm/msr.h>
#include <asm/olpc.h>
#define DRV_NAME "olpc-xo1-sci"
#define PFX DRV_NAME ": "
static unsigned long acpi_base;
static struct input_dev *power_button_idev;
static struct input_dev *ebook_switch_idev;
static struct input_dev *lid_switch_idev;
static int sci_irq;
static bool lid_open;
static bool lid_inverted;
static int lid_wake_mode;
enum lid_wake_modes {
LID_WAKE_ALWAYS,
LID_WAKE_OPEN,
LID_WAKE_CLOSE,
};
static const char * const lid_wake_mode_names[] = {
[LID_WAKE_ALWAYS] = "always",
[LID_WAKE_OPEN] = "open",
[LID_WAKE_CLOSE] = "close",
};
static void battery_status_changed(void)
{
struct power_supply *psy = power_supply_get_by_name("olpc-battery");
if (psy) {
power_supply_changed(psy);
put_device(&psy->dev);
}
}
static void ac_status_changed(void)
{
struct power_supply *psy = power_supply_get_by_name("olpc-ac");
if (psy) {
power_supply_changed(psy);
put_device(&psy->dev);
}
}
/* Report current ebook switch state through input layer */
static void send_ebook_state(void)
{
unsigned char state;
if (olpc_ec_cmd(EC_READ_EB_MODE, NULL, 0, &state, 1)) {
pr_err(PFX "failed to get ebook state\n");
return;
}
if (!!test_bit(SW_TABLET_MODE, ebook_switch_idev->sw) == state)
return; /* Nothing new to report. */
input_report_switch(ebook_switch_idev, SW_TABLET_MODE, state);
input_sync(ebook_switch_idev);
pm_wakeup_event(&ebook_switch_idev->dev, 0);
}
static void flip_lid_inverter(void)
{
/* gpio is high; invert so we'll get l->h event interrupt */
if (lid_inverted)
cs5535_gpio_clear(OLPC_GPIO_LID, GPIO_INPUT_INVERT);
else
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_INPUT_INVERT);
lid_inverted = !lid_inverted;
}
static void detect_lid_state(void)
{
/*
* the edge detector hookup on the gpio inputs on the geode is
* odd, to say the least. See http://dev.laptop.org/ticket/5703
* for details, but in a nutshell: we don't use the edge
* detectors. instead, we make use of an anomoly: with the both
* edge detectors turned off, we still get an edge event on a
* positive edge transition. to take advantage of this, we use the
* front-end inverter to ensure that that's the edge we're always
* going to see next.
*/
int state;
state = cs5535_gpio_isset(OLPC_GPIO_LID, GPIO_READ_BACK);
lid_open = !state ^ !lid_inverted; /* x ^^ y */
if (!state)
return;
flip_lid_inverter();
}
/* Report current lid switch state through input layer */
static void send_lid_state(void)
{
if (!!test_bit(SW_LID, lid_switch_idev->sw) == !lid_open)
return; /* Nothing new to report. */
input_report_switch(lid_switch_idev, SW_LID, !lid_open);
input_sync(lid_switch_idev);
pm_wakeup_event(&lid_switch_idev->dev, 0);
}
static ssize_t lid_wake_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
const char *mode = lid_wake_mode_names[lid_wake_mode];
return sprintf(buf, "%s\n", mode);
}
static ssize_t lid_wake_mode_set(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int i;
for (i = 0; i < ARRAY_SIZE(lid_wake_mode_names); i++) {
const char *mode = lid_wake_mode_names[i];
if (strlen(mode) != count || strncasecmp(mode, buf, count))
continue;
lid_wake_mode = i;
return count;
}
return -EINVAL;
}
static DEVICE_ATTR(lid_wake_mode, S_IWUSR | S_IRUGO, lid_wake_mode_show,
lid_wake_mode_set);
/*
* Process all items in the EC's SCI queue.
*
* This is handled in a workqueue because olpc_ec_cmd can be slow (and
* can even timeout).
*
* If propagate_events is false, the queue is drained without events being
* generated for the interrupts.
*/
static void process_sci_queue(bool propagate_events)
{
int r;
u16 data;
do {
r = olpc_ec_sci_query(&data);
if (r || !data)
break;
pr_debug(PFX "SCI 0x%x received\n", data);
switch (data) {
case EC_SCI_SRC_BATERR:
case EC_SCI_SRC_BATSOC:
case EC_SCI_SRC_BATTERY:
case EC_SCI_SRC_BATCRIT:
battery_status_changed();
break;
case EC_SCI_SRC_ACPWR:
ac_status_changed();
break;
}
if (data == EC_SCI_SRC_EBOOK && propagate_events)
send_ebook_state();
} while (data);
if (r)
pr_err(PFX "Failed to clear SCI queue");
}
static void process_sci_queue_work(struct work_struct *work)
{
process_sci_queue(true);
}
static DECLARE_WORK(sci_work, process_sci_queue_work);
static irqreturn_t xo1_sci_intr(int irq, void *dev_id)
{
struct platform_device *pdev = dev_id;
u32 sts;
u32 gpe;
sts = inl(acpi_base + CS5536_PM1_STS);
outl(sts | 0xffff, acpi_base + CS5536_PM1_STS);
gpe = inl(acpi_base + CS5536_PM_GPE0_STS);
outl(0xffffffff, acpi_base + CS5536_PM_GPE0_STS);
dev_dbg(&pdev->dev, "sts %x gpe %x\n", sts, gpe);
if (sts & CS5536_PWRBTN_FLAG) {
if (!(sts & CS5536_WAK_FLAG)) {
/* Only report power button input when it was pressed
* during regular operation (as opposed to when it
* was used to wake the system). */
input_report_key(power_button_idev, KEY_POWER, 1);
input_sync(power_button_idev);
input_report_key(power_button_idev, KEY_POWER, 0);
input_sync(power_button_idev);
}
/* Report the wakeup event in all cases. */
pm_wakeup_event(&power_button_idev->dev, 0);
}
if ((sts & (CS5536_RTC_FLAG | CS5536_WAK_FLAG)) ==
(CS5536_RTC_FLAG | CS5536_WAK_FLAG)) {
/* When the system is woken by the RTC alarm, report the
* event on the rtc device. */
struct device *rtc = bus_find_device_by_name(
&platform_bus_type, NULL, "rtc_cmos");
if (rtc) {
pm_wakeup_event(rtc, 0);
put_device(rtc);
}
}
if (gpe & CS5536_GPIOM7_PME_FLAG) { /* EC GPIO */
cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_NEGATIVE_EDGE_STS);
schedule_work(&sci_work);
}
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_STS);
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_STS);
detect_lid_state();
send_lid_state();
return IRQ_HANDLED;
}
static int xo1_sci_suspend(struct platform_device *pdev, pm_message_t state)
{
if (device_may_wakeup(&power_button_idev->dev))
olpc_xo1_pm_wakeup_set(CS5536_PM_PWRBTN);
else
olpc_xo1_pm_wakeup_clear(CS5536_PM_PWRBTN);
if (device_may_wakeup(&ebook_switch_idev->dev))
olpc_ec_wakeup_set(EC_SCI_SRC_EBOOK);
else
olpc_ec_wakeup_clear(EC_SCI_SRC_EBOOK);
if (!device_may_wakeup(&lid_switch_idev->dev)) {
cs5535_gpio_clear(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
} else if ((lid_open && lid_wake_mode == LID_WAKE_OPEN) ||
(!lid_open && lid_wake_mode == LID_WAKE_CLOSE)) {
flip_lid_inverter();
/* we may have just caused an event */
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_STS);
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_STS);
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
}
return 0;
}
static int xo1_sci_resume(struct platform_device *pdev)
{
/*
* We don't know what may have happened while we were asleep.
* Reestablish our lid setup so we're sure to catch all transitions.
*/
detect_lid_state();
send_lid_state();
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
/* Enable all EC events */
olpc_ec_mask_write(EC_SCI_SRC_ALL);
/* Power/battery status might have changed too */
battery_status_changed();
ac_status_changed();
return 0;
}
static int setup_sci_interrupt(struct platform_device *pdev)
{
u32 lo, hi;
u32 sts;
int r;
rdmsr(0x51400020, lo, hi);
sci_irq = (lo >> 20) & 15;
if (sci_irq) {
dev_info(&pdev->dev, "SCI is mapped to IRQ %d\n", sci_irq);
} else {
/* Zero means masked */
dev_info(&pdev->dev, "SCI unmapped. Mapping to IRQ 3\n");
sci_irq = 3;
lo |= 0x00300000;
wrmsrl(0x51400020, lo);
}
/* Select level triggered in PIC */
if (sci_irq < 8) {
lo = inb(CS5536_PIC_INT_SEL1);
lo |= 1 << sci_irq;
outb(lo, CS5536_PIC_INT_SEL1);
} else {
lo = inb(CS5536_PIC_INT_SEL2);
lo |= 1 << (sci_irq - 8);
outb(lo, CS5536_PIC_INT_SEL2);
}
/* Enable interesting SCI events, and clear pending interrupts */
sts = inl(acpi_base + CS5536_PM1_STS);
outl(((CS5536_PM_PWRBTN | CS5536_PM_RTC) << 16) | 0xffff,
acpi_base + CS5536_PM1_STS);
r = request_irq(sci_irq, xo1_sci_intr, 0, DRV_NAME, pdev);
if (r)
dev_err(&pdev->dev, "can't request interrupt\n");
return r;
}
static int setup_ec_sci(void)
{
int r;
r = gpio_request(OLPC_GPIO_ECSCI, "OLPC-ECSCI");
if (r)
return r;
gpio_direction_input(OLPC_GPIO_ECSCI);
/* Clear pending EC SCI events */
cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_NEGATIVE_EDGE_STS);
cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_POSITIVE_EDGE_STS);
/*
* Enable EC SCI events, and map them to both a PME and the SCI
* interrupt.
*
* Ordinarily, in addition to functioning as GPIOs, Geode GPIOs can
* be mapped to regular interrupts *or* Geode-specific Power
* Management Events (PMEs) - events that bring the system out of
* suspend. In this case, we want both of those things - the system
* wakeup, *and* the ability to get an interrupt when an event occurs.
*
* To achieve this, we map the GPIO to a PME, and then we use one
* of the many generic knobs on the CS5535 PIC to additionally map the
* PME to the regular SCI interrupt line.
*/
cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_EVENTS_ENABLE);
/* Set the SCI to cause a PME event on group 7 */
cs5535_gpio_setup_event(OLPC_GPIO_ECSCI, 7, 1);
/* And have group 7 also fire the SCI interrupt */
cs5535_pic_unreqz_select_high(7, sci_irq);
return 0;
}
static void free_ec_sci(void)
{
gpio_free(OLPC_GPIO_ECSCI);
}
static int setup_lid_events(void)
{
int r;
r = gpio_request(OLPC_GPIO_LID, "OLPC-LID");
if (r)
return r;
gpio_direction_input(OLPC_GPIO_LID);
cs5535_gpio_clear(OLPC_GPIO_LID, GPIO_INPUT_INVERT);
lid_inverted = 0;
/* Clear edge detection and event enable for now */
cs5535_gpio_clear(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
cs5535_gpio_clear(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_EN);
cs5535_gpio_clear(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_EN);
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_STS);
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_STS);
/* Set the LID to cause an PME event on group 6 */
cs5535_gpio_setup_event(OLPC_GPIO_LID, 6, 1);
/* Set PME group 6 to fire the SCI interrupt */
cs5535_gpio_set_irq(6, sci_irq);
/* Enable the event */
cs5535_gpio_set(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
return 0;
}
static void free_lid_events(void)
{
gpio_free(OLPC_GPIO_LID);
}
static int setup_power_button(struct platform_device *pdev)
{
int r;
power_button_idev = input_allocate_device();
if (!power_button_idev)
return -ENOMEM;
power_button_idev->name = "Power Button";
power_button_idev->phys = DRV_NAME "/input0";
set_bit(EV_KEY, power_button_idev->evbit);
set_bit(KEY_POWER, power_button_idev->keybit);
power_button_idev->dev.parent = &pdev->dev;
device_init_wakeup(&power_button_idev->dev, 1);
r = input_register_device(power_button_idev);
if (r) {
dev_err(&pdev->dev, "failed to register power button: %d\n", r);
input_free_device(power_button_idev);
}
return r;
}
static void free_power_button(void)
{
input_unregister_device(power_button_idev);
}
static int setup_ebook_switch(struct platform_device *pdev)
{
int r;
ebook_switch_idev = input_allocate_device();
if (!ebook_switch_idev)
return -ENOMEM;
ebook_switch_idev->name = "EBook Switch";
ebook_switch_idev->phys = DRV_NAME "/input1";
set_bit(EV_SW, ebook_switch_idev->evbit);
set_bit(SW_TABLET_MODE, ebook_switch_idev->swbit);
ebook_switch_idev->dev.parent = &pdev->dev;
device_set_wakeup_capable(&ebook_switch_idev->dev, true);
r = input_register_device(ebook_switch_idev);
if (r) {
dev_err(&pdev->dev, "failed to register ebook switch: %d\n", r);
input_free_device(ebook_switch_idev);
}
return r;
}
static void free_ebook_switch(void)
{
input_unregister_device(ebook_switch_idev);
}
static int setup_lid_switch(struct platform_device *pdev)
{
int r;
lid_switch_idev = input_allocate_device();
if (!lid_switch_idev)
return -ENOMEM;
lid_switch_idev->name = "Lid Switch";
lid_switch_idev->phys = DRV_NAME "/input2";
set_bit(EV_SW, lid_switch_idev->evbit);
set_bit(SW_LID, lid_switch_idev->swbit);
lid_switch_idev->dev.parent = &pdev->dev;
device_set_wakeup_capable(&lid_switch_idev->dev, true);
r = input_register_device(lid_switch_idev);
if (r) {
dev_err(&pdev->dev, "failed to register lid switch: %d\n", r);
goto err_register;
}
r = device_create_file(&lid_switch_idev->dev, &dev_attr_lid_wake_mode);
if (r) {
dev_err(&pdev->dev, "failed to create wake mode attr: %d\n", r);
goto err_create_attr;
}
return 0;
err_create_attr:
input_unregister_device(lid_switch_idev);
lid_switch_idev = NULL;
err_register:
input_free_device(lid_switch_idev);
return r;
}
static void free_lid_switch(void)
{
device_remove_file(&lid_switch_idev->dev, &dev_attr_lid_wake_mode);
input_unregister_device(lid_switch_idev);
}
static int xo1_sci_probe(struct platform_device *pdev)
{
struct resource *res;
int r;
/* don't run on non-XOs */
if (!machine_is_olpc())
return -ENODEV;
r = mfd_cell_enable(pdev);
if (r)
return r;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!res) {
dev_err(&pdev->dev, "can't fetch device resource info\n");
return -EIO;
}
acpi_base = res->start;
r = setup_power_button(pdev);
if (r)
return r;
r = setup_ebook_switch(pdev);
if (r)
goto err_ebook;
r = setup_lid_switch(pdev);
if (r)
goto err_lid;
r = setup_lid_events();
if (r)
goto err_lidevt;
r = setup_ec_sci();
if (r)
goto err_ecsci;
/* Enable PME generation for EC-generated events */
outl(CS5536_GPIOM6_PME_EN | CS5536_GPIOM7_PME_EN,
acpi_base + CS5536_PM_GPE0_EN);
/* Clear pending events */
outl(0xffffffff, acpi_base + CS5536_PM_GPE0_STS);
process_sci_queue(false);
/* Initial sync */
send_ebook_state();
detect_lid_state();
send_lid_state();
r = setup_sci_interrupt(pdev);
if (r)
goto err_sci;
/* Enable all EC events */
olpc_ec_mask_write(EC_SCI_SRC_ALL);
return r;
err_sci:
free_ec_sci();
err_ecsci:
free_lid_events();
err_lidevt:
free_lid_switch();
err_lid:
free_ebook_switch();
err_ebook:
free_power_button();
return r;
}
static int xo1_sci_remove(struct platform_device *pdev)
{
mfd_cell_disable(pdev);
free_irq(sci_irq, pdev);
cancel_work_sync(&sci_work);
free_ec_sci();
free_lid_events();
free_lid_switch();
free_ebook_switch();
free_power_button();
acpi_base = 0;
return 0;
}
static struct platform_driver xo1_sci_driver = {
.driver = {
.name = "olpc-xo1-sci-acpi",
},
.probe = xo1_sci_probe,
.remove = xo1_sci_remove,
.suspend = xo1_sci_suspend,
.resume = xo1_sci_resume,
};
static int __init xo1_sci_init(void)
{
return platform_driver_register(&xo1_sci_driver);
}
arch_initcall(xo1_sci_init);