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rtc-rs5c372 becomes a new-style i2c driver

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Convert rtc-rs5c372 to be a "new style" I2C driver, and update the
Kconfig text to be more complete..

Verified on an OMAP H4 development platform, along with a board
init patch to declare its rv5c387a device.

Only one defconfig -- powerpc/linkstation -- uses this driver; but
several other platforms use it, just without defconfig support.

Such platforms need to be converted so (a) their I2C adapter driver
supports new-style drivers, and (b) board init code declares this
I2C device.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Voipio Riku <Riku.Voipio@movial.fi>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Martin Michlmayr <tbm@cyrius.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Brownell
2007-07-17 04:04:55 -07:00
committed by Linus Torvalds
parent 045e0e85f2
commit d815461c7a
2 changed files with 36 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
drivers/rtc/rtc-rs5c372.c
View File

@@ -13,13 +13,7 @@
#include <linux/rtc.h>
#include <linux/bcd.h>
#define DRV_VERSION "0.4"
/* Addresses to scan */
static unsigned short normal_i2c[] = { /* 0x32,*/ I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD;
#define DRV_VERSION "0.5"
/*
@@ -88,9 +82,6 @@ struct rs5c372 {
unsigned has_irq:1;
char buf[17];
char *regs;
/* on conversion to a "new style" i2c driver, this vanishes */
struct i2c_client dev;
};
static int rs5c_get_regs(struct rs5c372 *rs5c)
@@ -483,25 +474,35 @@ static int rs5c_sysfs_register(struct device *dev)
return err;
}
static void rs5c_sysfs_unregister(struct device *dev)
{
device_remove_file(dev, &dev_attr_trim);
device_remove_file(dev, &dev_attr_osc);
}
#else
static int rs5c_sysfs_register(struct device *dev)
{
return 0;
}
static void rs5c_sysfs_unregister(struct device *dev)
{
/* nothing */
}
#endif /* SYSFS */
static struct i2c_driver rs5c372_driver;
static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
static int rs5c372_probe(struct i2c_client *client)
{
int err = 0;
struct i2c_client *client;
struct rs5c372 *rs5c372;
struct rtc_time tm;
dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
dev_dbg(&client->dev, "%s\n", __FUNCTION__);
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
err = -ENODEV;
goto exit;
}
@@ -514,35 +515,22 @@ static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
/* we read registers 0x0f then 0x00-0x0f; skip the first one */
rs5c372->regs=&rs5c372->buf[1];
/* On conversion to a "new style" i2c driver, we'll be handed
* the i2c_client (we won't create it)
*/
client = &rs5c372->dev;
rs5c372->client = client;
/* I2C client */
client->addr = address;
client->driver = &rs5c372_driver;
client->adapter = adapter;
strlcpy(client->name, rs5c372_driver.driver.name, I2C_NAME_SIZE);
i2c_set_clientdata(client, rs5c372);
/* Inform the i2c layer */
if ((err = i2c_attach_client(client)))
goto exit_kfree;
err = rs5c_get_regs(rs5c372);
if (err < 0)
goto exit_detach;
goto exit_kfree;
/* For "new style" drivers, irq is in i2c_client and chip type
* info comes from i2c_client.dev.platform_data. Meanwhile:
*
* STICK BOARD-SPECIFIC SETUP CODE RIGHT HERE
*/
if (rs5c372->type == rtc_undef) {
if (strcmp(client->name, "rs5c372a") == 0)
rs5c372->type = rtc_rs5c372a;
else if (strcmp(client->name, "rs5c372b") == 0)
rs5c372->type = rtc_rs5c372b;
else if (strcmp(client->name, "rv5c386") == 0)
rs5c372->type = rtc_rv5c386;
else if (strcmp(client->name, "rv5c387a") == 0)
rs5c372->type = rtc_rv5c387a;
else {
rs5c372->type = rtc_rs5c372b;
dev_warn(&client->dev, "assuming rs5c372b\n");
}
@@ -567,7 +555,7 @@ static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
break;
default:
dev_err(&client->dev, "unknown RTC type\n");
goto exit_detach;
goto exit_kfree;
}
/* if the oscillator lost power and no other software (like
@@ -601,7 +589,7 @@ static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
if ((i2c_master_send(client, buf, 3)) != 3) {
dev_err(&client->dev, "setup error\n");
goto exit_detach;
goto exit_kfree;
}
rs5c372->regs[RS5C_REG_CTRL1] = buf[1];
rs5c372->regs[RS5C_REG_CTRL2] = buf[2];
@@ -621,14 +609,14 @@ static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
rs5c372->time24 ? "24hr" : "am/pm"
);
/* FIXME when client->irq exists, use it to register alarm irq */
/* REVISIT use client->irq to register alarm irq ... */
rs5c372->rtc = rtc_device_register(rs5c372_driver.driver.name,
&client->dev, &rs5c372_rtc_ops, THIS_MODULE);
if (IS_ERR(rs5c372->rtc)) {
err = PTR_ERR(rs5c372->rtc);
goto exit_detach;
goto exit_kfree;
}
err = rs5c_sysfs_register(&client->dev);
@@ -640,9 +628,6 @@ static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
exit_devreg:
rtc_device_unregister(rs5c372->rtc);
exit_detach:
i2c_detach_client(client);
exit_kfree:
kfree(rs5c372);
@@ -650,24 +635,12 @@ exit:
return err;
}
static int rs5c372_attach(struct i2c_adapter *adapter)
static int rs5c372_remove(struct i2c_client *client)
{
return i2c_probe(adapter, &addr_data, rs5c372_probe);
}
static int rs5c372_detach(struct i2c_client *client)
{
int err;
struct rs5c372 *rs5c372 = i2c_get_clientdata(client);
if (rs5c372->rtc)
rtc_device_unregister(rs5c372->rtc);
/* REVISIT properly destroy the sysfs files ... */
if ((err = i2c_detach_client(client)))
return err;
rtc_device_unregister(rs5c372->rtc);
rs5c_sysfs_unregister(&client->dev);
kfree(rs5c372);
return 0;
}
@@ -676,8 +649,8 @@ static struct i2c_driver rs5c372_driver = {
.driver = {
.name = "rtc-rs5c372",
},
.attach_adapter = &rs5c372_attach,
.detach_client = &rs5c372_detach,
.probe = rs5c372_probe,
.remove = rs5c372_remove,
};
static __init int rs5c372_init(void)