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Merge branch 'akpm' (Andrew's incoming - part two)

Browse Source 
Says Andrew:

 "60 patches.  That's good enough for -rc1 I guess.  I have quite a lot
  of detritus to be rechecked, work through maintainers, etc.

 - most of the remains of MM
 - rtc
 - various misc
 - cgroups
 - memcg
 - cpusets
 - procfs
 - ipc
 - rapidio
 - sysctl
 - pps
 - w1
 - drivers/misc
 - aio"

* akpm: (60 commits)
  memcg: replace ss->id_lock with a rwlock
  aio: allocate kiocbs in batches
  drivers/misc/vmw_balloon.c: fix typo in code comment
  drivers/misc/vmw_balloon.c: determine page allocation flag can_sleep outside loop
  w1: disable irqs in critical section
  drivers/w1/w1_int.c: multiple masters used same init_name
  drivers/power/ds2780_battery.c: fix deadlock upon insertion and removal
  drivers/power/ds2780_battery.c: add a nolock function to w1 interface
  drivers/power/ds2780_battery.c: create central point for calling w1 interface
  w1: ds2760 and ds2780, use ida for id and ida_simple_get() to get it
  pps gpio client: add missing dependency
  pps: new client driver using GPIO
  pps: default echo function
  include/linux/dma-mapping.h: add dma_zalloc_coherent()
  sysctl: make CONFIG_SYSCTL_SYSCALL default to n
  sysctl: add support for poll()
  RapidIO: documentation update
  drivers/net/rionet.c: fix ethernet address macros for LE platforms
  RapidIO: fix potential null deref in rio_setup_device()
  RapidIO: add mport driver for Tsi721 bridge
  ...
This commit is contained in:
Linus Torvalds
2011-11-02 16:07:27 -07:00
parent 80c2861672 c1e2ee2dc4
commit 092f4c56c1
70 changed files with 4915 additions and 1041 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/DMA-API.txt
View File

@@ -50,6 +50,13 @@ specify the GFP_ flags (see kmalloc) for the allocation (the
implementation may choose to ignore flags that affect the location of
the returned memory, like GFP_DMA).
void *
dma_zalloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
Wraps dma_alloc_coherent() and also zeroes the returned memory if the
allocation attempt succeeded.
void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)

1
Documentation/cgroups/memory.txt
View File

@@ -418,7 +418,6 @@ total_unevictable - sum of all children's "unevictable"
# The following additional stats are dependent on CONFIG_DEBUG_VM.
inactive_ratio - VM internal parameter. (see mm/page_alloc.c)
recent_rotated_anon - VM internal parameter. (see mm/vmscan.c)
recent_rotated_file - VM internal parameter. (see mm/vmscan.c)
recent_scanned_anon - VM internal parameter. (see mm/vmscan.c)

35
Documentation/feature-removal-schedule.txt
View File

@@ -133,41 +133,6 @@ Who: Pavel Machek <pavel@ucw.cz>
---------------------------
What: sys_sysctl
When: September 2010
Option: CONFIG_SYSCTL_SYSCALL
Why: The same information is available in a more convenient from
/proc/sys, and none of the sysctl variables appear to be
important performance wise.
Binary sysctls are a long standing source of subtle kernel
bugs and security issues.
When I looked several months ago all I could find after
searching several distributions were 5 user space programs and
glibc (which falls back to /proc/sys) using this syscall.
The man page for sysctl(2) documents it as unusable for user
space programs.
sysctl(2) is not generally ABI compatible to a 32bit user
space application on a 64bit and a 32bit kernel.
For the last several months the policy has been no new binary
sysctls and no one has put forward an argument to use them.
Binary sysctls issues seem to keep happening appearing so
properly deprecating them (with a warning to user space) and a
2 year grace warning period will mean eventually we can kill
them and end the pain.
In the mean time individual binary sysctls can be dealt with
in a piecewise fashion.
Who: Eric Biederman <ebiederm@xmission.com>
---------------------------
What: /proc/<pid>/oom_adj
When: August 2012
Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's

2
Documentation/rapidio/rapidio.txt
View File

@@ -144,7 +144,7 @@ and the default device ID in order to access the device on the active port.
After the host has completed enumeration of the entire network it releases
devices by clearing device ID locks (calls rio_clear_locks()). For each endpoint
in the system, it sets the Master Enable bit in the Port General Control CSR
in the system, it sets the Discovered bit in the Port General Control CSR
to indicate that enumeration is completed and agents are allowed to execute
passive discovery of the network.

49
Documentation/rapidio/tsi721.txt Normal file
View File

@@ -0,0 +1,49 @@
RapidIO subsystem mport driver for IDT Tsi721 PCI Express-to-SRIO bridge.
=========================================================================
I. Overview
This driver implements all currently defined RapidIO mport callback functions.
It supports maintenance read and write operations, inbound and outbound RapidIO
doorbells, inbound maintenance port-writes and RapidIO messaging.
To generate SRIO maintenance transactions this driver uses one of Tsi721 DMA
channels. This mechanism provides access to larger range of hop counts and
destination IDs without need for changes in outbound window translation.
RapidIO messaging support uses dedicated messaging channels for each mailbox.
For inbound messages this driver uses destination ID matching to forward messages
into the corresponding message queue. Messaging callbacks are implemented to be
fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
II. Known problems
None.
III. To do
Add DMA data transfers (non-messaging).
Add inbound region (SRIO-to-PCIe) mapping.
IV. Version History
1.0.0 - Initial driver release.
V. License
-----------------------------------------------
Copyright(c) 2011 Integrated Device Technology, Inc. All rights reserved.
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.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

12
arch/powerpc/mm/gup.c
View File

@@ -16,16 +16,6 @@
#ifdef __HAVE_ARCH_PTE_SPECIAL
static inline void get_huge_page_tail(struct page *page)
{
/*
* __split_huge_page_refcount() cannot run
* from under us.
*/
VM_BUG_ON(atomic_read(&page->_count) < 0);
atomic_inc(&page->_count);
}
/*
* The performance critical leaf functions are made noinline otherwise gcc
* inlines everything into a single function which results in too much
@@ -57,8 +47,6 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
put_page(page);
return 0;
}
if (PageTail(page))
get_huge_page_tail(page);
pages[*nr] = page;
(*nr)++;

21
arch/powerpc/mm/hugetlbpage.c
View File

@@ -390,7 +390,7 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
{
unsigned long mask;
unsigned long pte_end;
struct page *head, *page;
struct page *head, *page, *tail;
pte_t pte;
int refs;
@@ -413,6 +413,7 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
head = pte_page(pte);
page = head + ((addr & (sz-1)) >> PAGE_SHIFT);
tail = page;
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
@@ -428,10 +429,20 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
if (unlikely(pte_val(pte) != pte_val(*ptep))) {
/* Could be optimized better */
while (*nr) {
put_page(page);
(*nr)--;
}
*nr -= refs;
while (refs--)
put_page(head);
return 0;
}
/*
* Any tail page need their mapcount reference taken before we
* return.
*/
while (refs--) {
if (PageTail(tail))
get_huge_page_tail(tail);
tail++;
}
return 1;

1
arch/powerpc/sysdev/fsl_rio.c
View File

@@ -1608,6 +1608,7 @@ int fsl_rio_setup(struct platform_device *dev)
return 0;
err:
iounmap(priv->regs_win);
release_resource(&port->iores);
err_res:
kfree(priv);
err_priv:

14
arch/s390/mm/gup.c
View File

@@ -52,7 +52,7 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr)
{
unsigned long mask, result;
struct page *head, *page;
struct page *head, *page, *tail;
int refs;
result = write ? 0 : _SEGMENT_ENTRY_RO;
@@ -64,6 +64,7 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
refs = 0;
head = pmd_page(pmd);
page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
tail = page;
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
@@ -81,6 +82,17 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
*nr -= refs;
while (refs--)
put_page(head);
return 0;
}
/*
* Any tail page need their mapcount reference taken before we
* return.
*/
while (refs--) {
if (PageTail(tail))
get_huge_page_tail(tail);
tail++;
}
return 1;

2
arch/sparc/mm/gup.c
View File

@@ -56,6 +56,8 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
put_page(head);
return 0;
}
if (head != page)
get_huge_page_tail(page);
pages[*nr] = page;
(*nr)++;

10
arch/x86/mm/gup.c
View File

@@ -108,16 +108,6 @@ static inline void get_head_page_multiple(struct page *page, int nr)
SetPageReferenced(page);
}
static inline void get_huge_page_tail(struct page *page)
{
/*
* __split_huge_page_refcount() cannot run
* from under us.
*/
VM_BUG_ON(atomic_read(&page->_count) < 0);
atomic_inc(&page->_count);
}
static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr)
{

4
drivers/misc/vmw_balloon.c
View File

@@ -151,7 +151,7 @@ MODULE_LICENSE("GPL");
struct vmballoon_stats {
unsigned int timer;
/* allocation statustics */
/* allocation statistics */
unsigned int alloc;
unsigned int alloc_fail;
unsigned int sleep_alloc;
@@ -412,6 +412,7 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
gfp_t flags;
unsigned int hv_status;
bool locked = false;
flags = can_sleep ? VMW_PAGE_ALLOC_CANSLEEP : VMW_PAGE_ALLOC_NOSLEEP;
do {
if (!can_sleep)
@@ -419,7 +420,6 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
else
STATS_INC(b->stats.sleep_alloc);
flags = can_sleep ? VMW_PAGE_ALLOC_CANSLEEP : VMW_PAGE_ALLOC_NOSLEEP;
page = alloc_page(flags);
if (!page) {
if (!can_sleep)

4
drivers/net/rionet.c
View File

@@ -88,8 +88,8 @@ static struct rio_dev **rionet_active;
#define dev_rionet_capable(dev) \
is_rionet_capable(dev->src_ops, dev->dst_ops)
#define RIONET_MAC_MATCH(x) (*(u32 *)x == 0x00010001)
#define RIONET_GET_DESTID(x) (*(u16 *)(x + 4))
#define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4))
#define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5))
static int rionet_rx_clean(struct net_device *ndev)
{

86
drivers/power/ds2780_battery.c
View File

@@ -39,6 +39,7 @@ struct ds2780_device_info {
struct device *dev;
struct power_supply bat;
struct device *w1_dev;
struct task_struct *mutex_holder;
};
enum current_types {
@@ -49,8 +50,8 @@ enum current_types {
static const char model[] = "DS2780";
static const char manufacturer[] = "Maxim/Dallas";
static inline struct ds2780_device_info *to_ds2780_device_info(
struct power_supply *psy)
static inline struct ds2780_device_info *
to_ds2780_device_info(struct power_supply *psy)
{
return container_of(psy, struct ds2780_device_info, bat);
}
@@ -60,17 +61,28 @@ static inline struct power_supply *to_power_supply(struct device *dev)
return dev_get_drvdata(dev);
}
static inline int ds2780_read8(struct device *dev, u8 *val, int addr)
static inline int ds2780_battery_io(struct ds2780_device_info *dev_info,
char *buf, int addr, size_t count, int io)
{
return w1_ds2780_io(dev, val, addr, sizeof(u8), 0);
if (dev_info->mutex_holder == current)
return w1_ds2780_io_nolock(dev_info->w1_dev, buf, addr, count, io);
else
return w1_ds2780_io(dev_info->w1_dev, buf, addr, count, io);
}
static int ds2780_read16(struct device *dev, s16 *val, int addr)
static inline int ds2780_read8(struct ds2780_device_info *dev_info, u8 *val,
int addr)
{
return ds2780_battery_io(dev_info, val, addr, sizeof(u8), 0);
}
static int ds2780_read16(struct ds2780_device_info *dev_info, s16 *val,
int addr)
{
int ret;
u8 raw[2];
ret = w1_ds2780_io(dev, raw, addr, sizeof(u8) * 2, 0);
ret = ds2780_battery_io(dev_info, raw, addr, sizeof(raw), 0);
if (ret < 0)
return ret;
@@ -79,16 +91,16 @@ static int ds2780_read16(struct device *dev, s16 *val, int addr)
return 0;
}
static inline int ds2780_read_block(struct device *dev, u8 *val, int addr,
size_t count)
static inline int ds2780_read_block(struct ds2780_device_info *dev_info,
u8 *val, int addr, size_t count)
{
return w1_ds2780_io(dev, val, addr, count, 0);
return ds2780_battery_io(dev_info, val, addr, count, 0);
}
static inline int ds2780_write(struct device *dev, u8 *val, int addr,
size_t count)
static inline int ds2780_write(struct ds2780_device_info *dev_info, u8 *val,
int addr, size_t count)
{
return w1_ds2780_io(dev, val, addr, count, 1);
return ds2780_battery_io(dev_info, val, addr, count, 1);
}
static inline int ds2780_store_eeprom(struct device *dev, int addr)
@@ -122,7 +134,7 @@ static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
{
int ret;
ret = ds2780_write(dev_info->w1_dev, &conductance,
ret = ds2780_write(dev_info, &conductance,
DS2780_RSNSP_REG, sizeof(u8));
if (ret < 0)
return ret;
@@ -134,7 +146,7 @@ static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
static int ds2780_get_rsgain_register(struct ds2780_device_info *dev_info,
u16 *rsgain)
{
return ds2780_read16(dev_info->w1_dev, rsgain, DS2780_RSGAIN_MSB_REG);
return ds2780_read16(dev_info, rsgain, DS2780_RSGAIN_MSB_REG);
}
/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
@@ -144,8 +156,8 @@ static int ds2780_set_rsgain_register(struct ds2780_device_info *dev_info,
int ret;
u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
ret = ds2780_write(dev_info->w1_dev, raw,
DS2780_RSGAIN_MSB_REG, sizeof(u8) * 2);
ret = ds2780_write(dev_info, raw,
DS2780_RSGAIN_MSB_REG, sizeof(raw));
if (ret < 0)
return ret;
@@ -167,7 +179,7 @@ static int ds2780_get_voltage(struct ds2780_device_info *dev_info,
* Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
* voltage LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &voltage_raw,
ret = ds2780_read16(dev_info, &voltage_raw,
DS2780_VOLT_MSB_REG);
if (ret < 0)
return ret;
@@ -196,7 +208,7 @@ static int ds2780_get_temperature(struct ds2780_device_info *dev_info,
* Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
* temperature LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &temperature_raw,
ret = ds2780_read16(dev_info, &temperature_raw,
DS2780_TEMP_MSB_REG);
if (ret < 0)
return ret;
@@ -222,13 +234,13 @@ static int ds2780_get_current(struct ds2780_device_info *dev_info,
* The units of measurement for current are dependent on the value of
* the sense resistor.
*/
ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
ret = ds2780_read8(dev_info, &sense_res_raw, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
if (sense_res_raw == 0) {
dev_err(dev_info->dev, "sense resistor value is 0\n");
return -ENXIO;
return -EINVAL;
}
sense_res = 1000 / sense_res_raw;
@@ -248,7 +260,7 @@ static int ds2780_get_current(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the current value are in bits 7 - 0 of the current
* LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &current_raw, reg_msb);
ret = ds2780_read16(dev_info, &current_raw, reg_msb);
if (ret < 0)
return ret;
@@ -267,7 +279,7 @@ static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
* The units of measurement for accumulated current are dependent on
* the value of the sense resistor.
*/
ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
ret = ds2780_read8(dev_info, &sense_res_raw, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
@@ -285,7 +297,7 @@ static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
* LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &current_raw, DS2780_ACR_MSB_REG);
ret = ds2780_read16(dev_info, &current_raw, DS2780_ACR_MSB_REG);
if (ret < 0)
return ret;
@@ -299,7 +311,7 @@ static int ds2780_get_capacity(struct ds2780_device_info *dev_info,
int ret;
u8 raw;
ret = ds2780_read8(dev_info->w1_dev, &raw, DS2780_RARC_REG);
ret = ds2780_read8(dev_info, &raw, DS2780_RARC_REG);
if (ret < 0)
return ret;
@@ -345,7 +357,7 @@ static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
* LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &charge_raw, DS2780_RAAC_MSB_REG);
ret = ds2780_read16(dev_info, &charge_raw, DS2780_RAAC_MSB_REG);
if (ret < 0)
return ret;
@@ -356,7 +368,7 @@ static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
static int ds2780_get_control_register(struct ds2780_device_info *dev_info,
u8 *control_reg)
{
return ds2780_read8(dev_info->w1_dev, control_reg, DS2780_CONTROL_REG);
return ds2780_read8(dev_info, control_reg, DS2780_CONTROL_REG);
}
static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
@@ -364,7 +376,7 @@ static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
{
int ret;
ret = ds2780_write(dev_info->w1_dev, &control_reg,
ret = ds2780_write(dev_info, &control_reg,
DS2780_CONTROL_REG, sizeof(u8));
if (ret < 0)
return ret;
@@ -503,7 +515,7 @@ static ssize_t ds2780_get_sense_resistor_value(struct device *dev,
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
ret = ds2780_read8(dev_info->w1_dev, &sense_resistor, DS2780_RSNSP_REG);
ret = ds2780_read8(dev_info, &sense_resistor, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
@@ -584,7 +596,7 @@ static ssize_t ds2780_get_pio_pin(struct device *dev,
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
ret = ds2780_read8(dev_info->w1_dev, &sfr, DS2780_SFR_REG);
ret = ds2780_read8(dev_info, &sfr, DS2780_SFR_REG);
if (ret < 0)
return ret;
@@ -611,7 +623,7 @@ static ssize_t ds2780_set_pio_pin(struct device *dev,
return -EINVAL;
}
ret = ds2780_write(dev_info->w1_dev, &new_setting,
ret = ds2780_write(dev_info, &new_setting,
DS2780_SFR_REG, sizeof(u8));
if (ret < 0)
return ret;
@@ -632,7 +644,7 @@ static ssize_t ds2780_read_param_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK1_END -
DS2780_EEPROM_BLOCK1_START + 1 - off);
return ds2780_read_block(dev_info->w1_dev, buf,
return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
}
@@ -650,7 +662,7 @@ static ssize_t ds2780_write_param_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK1_END -
DS2780_EEPROM_BLOCK1_START + 1 - off);
ret = ds2780_write(dev_info->w1_dev, buf,
ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
if (ret < 0)
return ret;
@@ -685,9 +697,8 @@ static ssize_t ds2780_read_user_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK0_END -
DS2780_EEPROM_BLOCK0_START + 1 - off);
return ds2780_read_block(dev_info->w1_dev, buf,
return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
}
static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
@@ -704,7 +715,7 @@ static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK0_END -
DS2780_EEPROM_BLOCK0_START + 1 - off);
ret = ds2780_write(dev_info->w1_dev, buf,
ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
if (ret < 0)
return ret;
@@ -768,6 +779,7 @@ static int __devinit ds2780_battery_probe(struct platform_device *pdev)
dev_info->bat.properties = ds2780_battery_props;
dev_info->bat.num_properties = ARRAY_SIZE(ds2780_battery_props);
dev_info->bat.get_property = ds2780_battery_get_property;
dev_info->mutex_holder = current;
ret = power_supply_register(&pdev->dev, &dev_info->bat);
if (ret) {
@@ -797,6 +809,8 @@ static int __devinit ds2780_battery_probe(struct platform_device *pdev)
goto fail_remove_bin_file;
}
dev_info->mutex_holder = NULL;
return 0;
fail_remove_bin_file:
@@ -816,6 +830,8 @@ static int __devexit ds2780_battery_remove(struct platform_device *pdev)
{
struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
dev_info->mutex_holder = current;
/* remove attributes */
sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);

9
drivers/pps/clients/Kconfig
View File

@@ -29,4 +29,13 @@ config PPS_CLIENT_PARPORT
If you say yes here you get support for a PPS source connected
with the interrupt pin of your parallel port.
config PPS_CLIENT_GPIO
tristate "PPS client using GPIO"
depends on PPS && GENERIC_HARDIRQS
help
If you say yes here you get support for a PPS source using
GPIO. To be useful you must also register a platform device
specifying the GPIO pin and other options, usually in your board
setup.
endif

1
drivers/pps/clients/Makefile
View File

@@ -5,5 +5,6 @@
obj-$(CONFIG_PPS_CLIENT_KTIMER) += pps-ktimer.o
obj-$(CONFIG_PPS_CLIENT_LDISC) += pps-ldisc.o
obj-$(CONFIG_PPS_CLIENT_PARPORT) += pps_parport.o
obj-$(CONFIG_PPS_CLIENT_GPIO) += pps-gpio.o
ccflags-$(CONFIG_PPS_DEBUG) := -DDEBUG

227
drivers/pps/clients/pps-gpio.c Normal file
View File

@@ -0,0 +1,227 @@
/*
* pps-gpio.c -- PPS client driver using GPIO
*
*
* Copyright (C) 2010 Ricardo Martins <rasm@fe.up.pt>
* Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define PPS_GPIO_NAME "pps-gpio"
#define pr_fmt(fmt) PPS_GPIO_NAME ": " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/pps_kernel.h>
#include <linux/pps-gpio.h>
#include <linux/gpio.h>
#include <linux/list.h>
/* Info for each registered platform device */
struct pps_gpio_device_data {
int irq; /* IRQ used as PPS source */
struct pps_device *pps; /* PPS source device */
struct pps_source_info info; /* PPS source information */
const struct pps_gpio_platform_data *pdata;
};
/*
* Report the PPS event
*/
static irqreturn_t pps_gpio_irq_handler(int irq, void *data)
{
const struct pps_gpio_device_data *info;
struct pps_event_time ts;
int rising_edge;
/* Get the time stamp first */
pps_get_ts(&ts);
info = data;
rising_edge = gpio_get_value(info->pdata->gpio_pin);
if ((rising_edge && !info->pdata->assert_falling_edge) ||
(!rising_edge && info->pdata->assert_falling_edge))
pps_event(info->pps, &ts, PPS_CAPTUREASSERT, NULL);
else if (info->pdata->capture_clear &&
((rising_edge && info->pdata->assert_falling_edge) ||
(!rising_edge && !info->pdata->assert_falling_edge)))
pps_event(info->pps, &ts, PPS_CAPTURECLEAR, NULL);
return IRQ_HANDLED;
}
static int pps_gpio_setup(struct platform_device *pdev)
{
int ret;
const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data;
ret = gpio_request(pdata->gpio_pin, pdata->gpio_label);
if (ret) {
pr_warning("failed to request GPIO %u\n", pdata->gpio_pin);
return -EINVAL;
}
ret = gpio_direction_input(pdata->gpio_pin);
if (ret) {
pr_warning("failed to set pin direction\n");
gpio_free(pdata->gpio_pin);
return -EINVAL;
}
return 0;
}
static unsigned long
get_irqf_trigger_flags(const struct pps_gpio_platform_data *pdata)
{
unsigned long flags = pdata->assert_falling_edge ?
IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
if (pdata->capture_clear) {
flags |= ((flags & IRQF_TRIGGER_RISING) ?
IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING);
}
return flags;
}
static int pps_gpio_probe(struct platform_device *pdev)
{
struct pps_gpio_device_data *data;
int irq;
int ret;
int err;
int pps_default_params;
const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data;
/* GPIO setup */
ret = pps_gpio_setup(pdev);
if (ret)
return -EINVAL;
/* IRQ setup */
irq = gpio_to_irq(pdata->gpio_pin);
if (irq < 0) {
pr_err("failed to map GPIO to IRQ: %d\n", irq);
err = -EINVAL;
goto return_error;
}
/* allocate space for device info */
data = kzalloc(sizeof(struct pps_gpio_device_data), GFP_KERNEL);
if (data == NULL) {
err = -ENOMEM;
goto return_error;
}
/* initialize PPS specific parts of the bookkeeping data structure. */
data->info.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT | PPS_CANWAIT | PPS_TSFMT_TSPEC;
if (pdata->capture_clear)
data->info.mode |= PPS_CAPTURECLEAR | PPS_OFFSETCLEAR |
PPS_ECHOCLEAR;
data->info.owner = THIS_MODULE;
snprintf(data->info.name, PPS_MAX_NAME_LEN - 1, "%s.%d",
pdev->name, pdev->id);
/* register PPS source */
pps_default_params = PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
if (pdata->capture_clear)
pps_default_params |= PPS_CAPTURECLEAR | PPS_OFFSETCLEAR;
data->pps = pps_register_source(&data->info, pps_default_params);
if (data->pps == NULL) {
kfree(data);
pr_err("failed to register IRQ %d as PPS source\n", irq);
err = -EINVAL;
goto return_error;
}
data->irq = irq;
data->pdata = pdata;
/* register IRQ interrupt handler */
ret = request_irq(irq, pps_gpio_irq_handler,
get_irqf_trigger_flags(pdata), data->info.name, data);
if (ret) {
pps_unregister_source(data->pps);
kfree(data);
pr_err("failed to acquire IRQ %d\n", irq);
err = -EINVAL;
goto return_error;
}
platform_set_drvdata(pdev, data);
dev_info(data->pps->dev, "Registered IRQ %d as PPS source\n", irq);
return 0;
return_error:
gpio_free(pdata->gpio_pin);
return err;
}
static int pps_gpio_remove(struct platform_device *pdev)
{
struct pps_gpio_device_data *data = platform_get_drvdata(pdev);
const struct pps_gpio_platform_data *pdata = data->pdata;
platform_set_drvdata(pdev, NULL);
free_irq(data->irq, data);
gpio_free(pdata->gpio_pin);
pps_unregister_source(data->pps);
pr_info("removed IRQ %d as PPS source\n", data->irq);
kfree(data);
return 0;
}
static struct platform_driver pps_gpio_driver = {
.probe = pps_gpio_probe,
.remove = __devexit_p(pps_gpio_remove),
.driver = {
.name = PPS_GPIO_NAME,
.owner = THIS_MODULE
},
};
static int __init pps_gpio_init(void)
{
int ret = platform_driver_register(&pps_gpio_driver);
if (ret < 0)
pr_err("failed to register platform driver\n");
return ret;
}
static void __exit pps_gpio_exit(void)
{
platform_driver_unregister(&pps_gpio_driver);
pr_debug("unregistered platform driver\n");
}
module_init(pps_gpio_init);
module_exit(pps_gpio_exit);
MODULE_AUTHOR("Ricardo Martins <rasm@fe.up.pt>");
MODULE_AUTHOR("James Nuss <jamesnuss@nanometrics.ca>");
MODULE_DESCRIPTION("Use GPIO pin as PPS source");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");

12
drivers/pps/clients/pps-ktimer.c
View File

@@ -51,17 +51,6 @@ static void pps_ktimer_event(unsigned long ptr)
mod_timer(&ktimer, jiffies + HZ);
}
/*
* The echo function
*/
static void pps_ktimer_echo(struct pps_device *pps, int event, void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
* The PPS info struct
*/
@@ -72,7 +61,6 @@ static struct pps_source_info pps_ktimer_info = {
.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT |
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.echo = pps_ktimer_echo,
.owner = THIS_MODULE,
};

9
drivers/pps/clients/pps_parport.c
View File

@@ -133,14 +133,6 @@ out_both:
return;
}
/* the PPS echo function */
static void pps_echo(struct pps_device *pps, int event, void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
static void parport_attach(struct parport *port)
{
struct pps_client_pp *device;
@@ -151,7 +143,6 @@ static void parport_attach(struct parport *port)
PPS_OFFSETASSERT | PPS_OFFSETCLEAR | \
PPS_ECHOASSERT | PPS_ECHOCLEAR | \
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.echo = pps_echo,
.owner = THIS_MODULE,
.dev = NULL
};

20
drivers/pps/kapi.c
View File

@@ -52,6 +52,14 @@ static void pps_add_offset(struct pps_ktime *ts, struct pps_ktime *offset)
ts->sec += offset->sec;
}
static void pps_echo_client_default(struct pps_device *pps, int event,
void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
* Exported functions
*/
@@ -80,13 +88,6 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
err = -EINVAL;
goto pps_register_source_exit;
}
if ((info->mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) != 0 &&
info->echo == NULL) {
pr_err("%s: echo function is not defined\n",
info->name);
err = -EINVAL;
goto pps_register_source_exit;
}
if ((info->mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
pr_err("%s: unspecified time format\n",
info->name);
@@ -108,6 +109,11 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
pps->params.mode = default_params;
pps->info = *info;
/* check for default echo function */
if ((pps->info.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) &&
pps->info.echo == NULL)
pps->info.echo = pps_echo_client_default;
init_waitqueue_head(&pps->queue);
spin_lock_init(&pps->lock);

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