Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/i2c-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/i2c-2.6: (78 commits)
commit e97b81ddbb
Author: Mark M. Hoffman <mhoffman@lightlink.com>
Date: Thu Mar 23 16:50:25 2006 +0100
[PATCH] i2c-parport: Make type parameter mandatory
This patch forces the user to specify what type of adapter is present when
loading i2c-parport or i2c-parport-light. If none is specified, the driver
init simply fails - instead of assuming adapter type 0.
This alleviates the sometimes lengthy boot time delays which can be caused
by accidentally building one of these into a kernel along with several i2c
slave drivers that have lengthy probe routines (e.g. hwmon drivers).
Kconfig and documentation updated accordingly.
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
...
This commit is contained in:
Linus Torvalds
commit
11f16971ce
9 changed files with 51 additions and 35 deletions
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@ -12,18 +12,22 @@ meant as a replacement for the older, individual drivers:
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teletext adapters)
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It currently supports the following devices:
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* Philips adapter
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* home brew teletext adapter
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* Velleman K8000 adapter
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* ELV adapter
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* Analog Devices evaluation boards (ADM1025, ADM1030, ADM1031, ADM1032)
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* Barco LPT->DVI (K5800236) adapter
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* (type=0) Philips adapter
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* (type=1) home brew teletext adapter
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* (type=2) Velleman K8000 adapter
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* (type=3) ELV adapter
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* (type=4) Analog Devices ADM1032 evaluation board
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* (type=5) Analog Devices evaluation boards: ADM1025, ADM1030, ADM1031
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* (type=6) Barco LPT->DVI (K5800236) adapter
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These devices use different pinout configurations, so you have to tell
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the driver what you have, using the type module parameter. There is no
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way to autodetect the devices. Support for different pinout configurations
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can be easily added when needed.
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Earlier kernels defaulted to type=0 (Philips). But now, if the type
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parameter is missing, the driver will simply fail to initialize.
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Building your own adapter
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-------------------------
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@ -1161,7 +1161,7 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
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bank. */
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if (kind < 0) {
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if (w83792d_read_value(client, W83792D_REG_CONFIG) & 0x80) {
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dev_warn(dev, "Detection failed at step 3\n");
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dev_dbg(dev, "Detection failed at step 1\n");
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goto ERROR1;
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}
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val1 = w83792d_read_value(client, W83792D_REG_BANK);
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@ -1170,6 +1170,7 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
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if (!(val1 & 0x07)) { /* is Bank0 */
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if (((!(val1 & 0x80)) && (val2 != 0xa3)) ||
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((val1 & 0x80) && (val2 != 0x5c))) {
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dev_dbg(dev, "Detection failed at step 2\n");
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goto ERROR1;
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}
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}
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@ -1177,7 +1178,7 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
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should match */
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if (w83792d_read_value(client,
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W83792D_REG_I2C_ADDR) != address) {
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dev_warn(dev, "Detection failed at step 5\n");
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dev_dbg(dev, "Detection failed at step 3\n");
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goto ERROR1;
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}
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}
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@ -286,7 +286,10 @@ config I2C_PARPORT
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This driver is a replacement for (and was inspired by) an older
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driver named i2c-philips-par. The new driver supports more devices,
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and makes it easier to add support for new devices.
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An adapter type parameter is now mandatory. Please read the file
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Documentation/i2c/busses/i2c-parport for details.
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Another driver exists, named i2c-parport-light, which doesn't depend
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on the parport driver. This is meant for embedded systems. Don't say
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Y here if you intend to say Y or M there.
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@ -121,9 +121,14 @@ static struct i2c_adapter parport_adapter = {
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static int __init i2c_parport_init(void)
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{
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if (type < 0 || type >= ARRAY_SIZE(adapter_parm)) {
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if (type < 0) {
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printk(KERN_WARNING "i2c-parport: adapter type unspecified\n");
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return -ENODEV;
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}
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if (type >= ARRAY_SIZE(adapter_parm)) {
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printk(KERN_WARNING "i2c-parport: invalid type (%d)\n", type);
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type = 0;
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return -ENODEV;
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}
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if (base == 0) {
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@ -241,9 +241,14 @@ static struct parport_driver i2c_parport_driver = {
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static int __init i2c_parport_init(void)
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{
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if (type < 0 || type >= ARRAY_SIZE(adapter_parm)) {
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if (type < 0) {
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printk(KERN_WARNING "i2c-parport: adapter type unspecified\n");
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return -ENODEV;
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}
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if (type >= ARRAY_SIZE(adapter_parm)) {
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printk(KERN_WARNING "i2c-parport: invalid type (%d)\n", type);
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type = 0;
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return -ENODEV;
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}
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return parport_register_driver(&i2c_parport_driver);
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@ -90,7 +90,7 @@ static struct adapter_parm adapter_parm[] = {
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},
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};
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static int type;
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static int type = -1;
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module_param(type, int, 0);
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MODULE_PARM_DESC(type,
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"Type of adapter:\n"
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@ -43,13 +43,6 @@
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#include <linux/init.h>
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#include <asm/io.h>
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/*
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HISTORY:
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2003-05-11 1.0.0 Updated from lm_sensors project for kernel 2.5
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(was i2c-sis645.c from lm_sensors 2.7.0)
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*/
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#define SIS96x_VERSION "1.0.0"
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/* base address register in PCI config space */
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#define SIS96x_BAR 0x04
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@ -337,7 +330,6 @@ static struct pci_driver sis96x_driver = {
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static int __init i2c_sis96x_init(void)
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{
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printk(KERN_INFO "i2c-sis96x version %s\n", SIS96x_VERSION);
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return pci_register_driver(&sis96x_driver);
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}
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@ -27,6 +27,7 @@
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#include <linux/rtc.h>
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#include <linux/bcd.h>
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#include <linux/mutex.h>
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#include <linux/workqueue.h>
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#define DS1374_REG_TOD0 0x00
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#define DS1374_REG_TOD1 0x01
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@ -139,7 +140,7 @@ ulong ds1374_get_rtc_time(void)
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return t1;
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}
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static void ds1374_set_tlet(ulong arg)
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static void ds1374_set_work(void *arg)
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{
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ulong t1, t2;
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int limit = 10; /* arbitrary retry limit */
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@ -168,17 +169,18 @@ static void ds1374_set_tlet(ulong arg)
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static ulong new_time;
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static DECLARE_TASKLET_DISABLED(ds1374_tasklet, ds1374_set_tlet,
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(ulong) & new_time);
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static struct workqueue_struct *ds1374_workqueue;
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static DECLARE_WORK(ds1374_work, ds1374_set_work, &new_time);
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int ds1374_set_rtc_time(ulong nowtime)
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{
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new_time = nowtime;
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if (in_interrupt())
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tasklet_schedule(&ds1374_tasklet);
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queue_work(ds1374_workqueue, &ds1374_work);
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else
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ds1374_set_tlet((ulong) & new_time);
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ds1374_set_work(&new_time);
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return 0;
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}
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@ -204,6 +206,8 @@ static int ds1374_probe(struct i2c_adapter *adap, int addr, int kind)
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client->adapter = adap;
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client->driver = &ds1374_driver;
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ds1374_workqueue = create_singlethread_workqueue("ds1374");
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if ((rc = i2c_attach_client(client)) != 0) {
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kfree(client);
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return rc;
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@ -227,7 +231,7 @@ static int ds1374_detach(struct i2c_client *client)
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if ((rc = i2c_detach_client(client)) == 0) {
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kfree(i2c_get_clientdata(client));
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tasklet_kill(&ds1374_tasklet);
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destroy_workqueue(ds1374_workqueue);
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}
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return rc;
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}
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@ -25,6 +25,7 @@
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#include <linux/rtc.h>
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#include <linux/bcd.h>
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#include <linux/mutex.h>
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#include <linux/workqueue.h>
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#include <asm/time.h>
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#include <asm/rtc.h>
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@ -111,7 +112,7 @@ m41t00_get_rtc_time(void)
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}
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static void
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m41t00_set_tlet(ulong arg)
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m41t00_set(void *arg)
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{
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struct rtc_time tm;
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ulong nowtime = *(ulong *)arg;
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@ -145,9 +146,9 @@ m41t00_set_tlet(ulong arg)
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return;
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}
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static ulong new_time;
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DECLARE_TASKLET_DISABLED(m41t00_tasklet, m41t00_set_tlet, (ulong)&new_time);
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static ulong new_time;
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static struct workqueue_struct *m41t00_wq;
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static DECLARE_WORK(m41t00_work, m41t00_set, &new_time);
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int
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m41t00_set_rtc_time(ulong nowtime)
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@ -155,9 +156,9 @@ m41t00_set_rtc_time(ulong nowtime)
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new_time = nowtime;
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if (in_interrupt())
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tasklet_schedule(&m41t00_tasklet);
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queue_work(m41t00_wq, &m41t00_work);
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else
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m41t00_set_tlet((ulong)&new_time);
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m41t00_set(&new_time);
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return 0;
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}
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@ -189,6 +190,7 @@ m41t00_probe(struct i2c_adapter *adap, int addr, int kind)
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return rc;
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}
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m41t00_wq = create_singlethread_workqueue("m41t00");
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save_client = client;
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return 0;
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}
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@ -206,7 +208,7 @@ m41t00_detach(struct i2c_client *client)
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if ((rc = i2c_detach_client(client)) == 0) {
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kfree(client);
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tasklet_kill(&m41t00_tasklet);
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destroy_workqueue(m41t00_wq);
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}
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return rc;
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}
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