summaryrefslogtreecommitdiff
path: root/recipes/linux/linux-2.6.31/boc01/005-091008-isl12024.patch
diff options
context:
space:
mode:
Diffstat (limited to 'recipes/linux/linux-2.6.31/boc01/005-091008-isl12024.patch')
-rw-r--r--recipes/linux/linux-2.6.31/boc01/005-091008-isl12024.patch512
1 files changed, 512 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.31/boc01/005-091008-isl12024.patch b/recipes/linux/linux-2.6.31/boc01/005-091008-isl12024.patch
new file mode 100644
index 0000000000..401ce4d9c8
--- /dev/null
+++ b/recipes/linux/linux-2.6.31/boc01/005-091008-isl12024.patch
@@ -0,0 +1,512 @@
+Index: linux-2.6.31/drivers/misc/eeprom/at24.c
+===================================================================
+--- linux-2.6.31.orig/drivers/misc/eeprom/at24.c 2009-10-19 16:55:01.000000000 +0200
++++ linux-2.6.31/drivers/misc/eeprom/at24.c 2009-10-19 16:55:05.000000000 +0200
+@@ -115,6 +115,8 @@
+ { "spd", AT24_DEVICE_MAGIC(2048 / 8,
+ AT24_FLAG_READONLY | AT24_FLAG_IRUGO) },
+ { "24c04", AT24_DEVICE_MAGIC(4096 / 8, 0) },
++ /* Intersil RTC/Unique-ID isl12024 eeprom handled here */
++ { "isl12024-eeprom", AT24_DEVICE_MAGIC(4096 / 8, AT24_FLAG_ADDR16) },
+ /* 24rf08 quirk is handled at i2c-core */
+ { "24c08", AT24_DEVICE_MAGIC(8192 / 8, 0) },
+ { "24c16", AT24_DEVICE_MAGIC(16384 / 8, 0) },
+Index: linux-2.6.31/drivers/rtc/Kconfig
+===================================================================
+--- linux-2.6.31.orig/drivers/rtc/Kconfig 2009-10-19 16:55:01.000000000 +0200
++++ linux-2.6.31/drivers/rtc/Kconfig 2009-10-19 16:55:05.000000000 +0200
+@@ -128,6 +128,12 @@
+
+ if I2C
+
++config RTC_DRV_ISL12024
++ tristate "Intersil 12024 RTC/Unique-ID"
++ help
++ If you say yes ....
++ This driver can also be built as a module.
++
+ config RTC_DRV_DS1307
+ tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
+ help
+Index: linux-2.6.31/drivers/rtc/Makefile
+===================================================================
+--- linux-2.6.31.orig/drivers/rtc/Makefile 2009-10-19 16:55:01.000000000 +0200
++++ linux-2.6.31/drivers/rtc/Makefile 2009-10-19 16:55:05.000000000 +0200
+@@ -40,6 +40,7 @@
+ obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
+ obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
+ obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
++obj-$(CONFIG_RTC_DRV_ISL12024) += rtc-isl12024.o
+ obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
+ obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
+ obj-$(CONFIG_RTC_DRV_M48T35) += rtc-m48t35.o
+Index: linux-2.6.31/drivers/rtc/rtc-isl12024.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.31/drivers/rtc/rtc-isl12024.c 2009-10-19 16:57:37.000000000 +0200
+@@ -0,0 +1,465 @@
++/*
++ * Intersil ISL12024 class driver
++ *
++ *
++ * Copyright (C) 2007, CenoSYS (www.cenosys.com).
++ *
++ * Guillaume Ligneul <guillaume.ligneul@gmail.com>
++ * Sylvain Giroudon <sylvain.giroudon@goobie.fr>
++ * Jeremy Laine <jeremy.laine@bolloretelecom.eu>
++ *
++ * This software program is licensed subject to the GNU General Public License
++ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
++ */
++
++#include <linux/module.h>
++#include <linux/i2c.h>
++#include <linux/bcd.h>
++#include <linux/rtc.h>
++#include <linux/delay.h>
++
++#define DRV_VERSION "0.3"
++
++#define ISL12024_CCR_BASE 0x30 /* Base address of CCR */
++#define ISL12024_ALM0_BASE 0x00 /* Base address of ALARM0 */
++#define ISL12024_INT_AL0E 0x20 /* Alarm 0 enable */
++
++/* Register map */
++
++/* device id section */
++#define ISL12024_REG_ID 0x20
++
++/* rtc section */
++#define ISL12024_REG_HR_MIL (1<<7) /* 24h/12h mode */
++#define ISL12024_REG_HR_PM (1<<5) /* PM/AM bit in 12h mode */
++#define ISL12024_REG_SC 0x30
++#define ISL12024_REG_DT 0x33 /* Date */
++#define ISL12024_REG_MO 0x34 /* Month */
++#define ISL12024_REG_YR 0x35 /* Year */
++#define ISL12024_REG_DW 0x36
++#define ISL12024_REG_Y2K 0x37
++#define ISL12024_RTC_SECTION_LEN 8
++
++/* control/status section */
++#define ISL12024_REG_SR 0x3F
++#define ISL12024_REG_SR_BAT (1<<7) /* battery */
++#define ISL12024_REG_SR_AL1 (1<<6) /* alarm 0 */
++#define ISL12024_REG_SR_AL0 (1<<5) /* alarm 1 */
++#define ISL12024_REG_SR_OSCF (1<<4) /* oscillator fail */
++#define ISL12024_REG_SR_RWEL (1<<2) /* register write enable latch */
++#define ISL12024_REG_SR_WEL (1<<1) /* write enable latch */
++#define ISL12024_REG_SR_RTCF (1<<0) /* rtc fail */
++#define ISL12024_REG_INT 0x11
++
++#define CCR_SEC 0
++#define CCR_MIN 1
++#define CCR_HOUR 2
++#define CCR_MDAY 3
++#define CCR_MONTH 4
++#define CCR_YEAR 5
++#define CCR_WDAY 6
++#define CCR_Y2K 7
++
++static int isl12024_get_status(struct i2c_client *client, unsigned char *sr);
++static int isl12024_fix_osc(struct i2c_client *client);
++
++static struct i2c_driver isl12024_driver;
++
++static int
++isl12024_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
++ unsigned len)
++{
++ int ret;
++ u8 dt_addr[2];
++
++ struct i2c_msg msgs[2] = {
++ {
++ .addr = client->addr,
++ .flags = 0,
++ .len = 2,
++ .buf = dt_addr,
++ },
++ {
++ .addr = client->addr,
++ .flags = I2C_M_RD,
++ .len = len ,
++ .buf = buf,
++ },
++ };
++
++ dt_addr[0] = 0;
++ dt_addr[1] = reg;
++
++ ret = i2c_transfer(client->adapter, msgs, 2);
++ if ( ret < 0) {
++ dev_err(&client->dev, "read error\n");
++ return -EIO;
++ }
++ return ret;
++}
++
++static int isl12024_i2c_validate_client(struct i2c_client *client)
++{
++ u8 regs[ISL12024_RTC_SECTION_LEN] = { 0, };
++ u8 zero_mask[ISL12024_RTC_SECTION_LEN] = {
++ 0x80, 0x80, 0x40, 0xc0, 0xe0, 0x00, 0xf8, 0xc6
++ };
++
++ int i;
++ int ret;
++
++ ret = isl12024_i2c_read_regs(client, ISL12024_REG_SC, regs, ISL12024_RTC_SECTION_LEN);
++
++ if (ret < 0)
++ return ret;
++
++ for (i = 0; i < ISL12024_RTC_SECTION_LEN; ++i) {
++ if (regs[i] & zero_mask[i]) /* check if bits are cleared */
++ return -ENODEV;
++ }
++
++ return 0;
++}
++
++static int isl12024_read_time(struct i2c_client *client,
++ struct rtc_time *tm)
++{
++ unsigned char sr;
++ int err;
++ u8 regs[ISL12024_RTC_SECTION_LEN] = { 0, };
++
++ if (isl12024_get_status(client, &sr) < 0) {
++ dev_err(&client->dev, "reading SR failed\n");
++ return -EIO;
++ }
++
++ err = isl12024_i2c_read_regs(client, ISL12024_REG_SC, regs, ISL12024_RTC_SECTION_LEN);
++
++ if (err < 0) {
++ dev_err(&client->dev, "reading RTC section failed\n");
++ return err;
++ }
++
++ tm->tm_sec = bcd2bin(regs[0]);
++ tm->tm_min = bcd2bin(regs[1]);
++
++ { /* HR field has a more complex interpretation */
++ const u8 _hr = regs[2];
++ if (_hr & ISL12024_REG_HR_MIL) /* 24h format */
++ tm->tm_hour = bcd2bin(_hr & 0x3f);
++ else { // 12h format
++ tm->tm_hour = bcd2bin(_hr & 0x1f);
++ if (_hr & ISL12024_REG_HR_PM) /* PM flag set */
++ tm->tm_hour += 12;
++ }
++ }
++
++ tm->tm_mday = bcd2bin(regs[3]);
++ tm->tm_mon = bcd2bin(regs[4]);
++ tm->tm_year = bcd2bin(regs[5]) + 100;
++ tm->tm_wday = bcd2bin(regs[6]);
++
++ return rtc_valid_tm(tm);
++}
++
++static int isl12024_get_status(struct i2c_client *client, unsigned char *sr)
++{
++ static unsigned char sr_addr[2] = { 0, ISL12024_REG_SR };
++
++ struct i2c_msg msgs[] = {
++ { client->addr, 0, 2, sr_addr }, /* setup read ptr */
++ { client->addr, I2C_M_RD, 1, sr }, /* read status */
++ };
++
++ /* read status register */
++ if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) {
++ dev_err(&client->dev, "%s: read error\n", __func__);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++static int isl12024_set_datetime(struct i2c_client *client, struct rtc_time *tm,
++ int datetoo, u8 reg_base, unsigned char alm_enable)
++{
++ int i, xfer, nbytes;
++ unsigned char buf[8];
++ unsigned char rdata[10] = { 0, reg_base };
++
++ static const unsigned char wel[3] = { 0, ISL12024_REG_SR,
++ ISL12024_REG_SR_WEL };
++
++ static const unsigned char rwel[3] = { 0, ISL12024_REG_SR,
++ ISL12024_REG_SR_WEL | ISL12024_REG_SR_RWEL };
++
++ static const unsigned char diswe[3] = { 0, ISL12024_REG_SR, 0 };
++
++ dev_dbg(&client->dev,
++ "%s: secs=%d, mins=%d, hours=%d\n",
++ __func__,
++ tm->tm_sec, tm->tm_min, tm->tm_hour);
++
++ buf[CCR_SEC] = bin2bcd(tm->tm_sec);
++ buf[CCR_MIN] = bin2bcd(tm->tm_min);
++
++ /* set hour and 24hr bit */
++ buf[CCR_HOUR] = bin2bcd(tm->tm_hour) | ISL12024_REG_HR_MIL;
++
++ /* should we also set the date? */
++ if (datetoo) {
++ dev_dbg(&client->dev,
++ "%s: mday=%d, mon=%d, year=%d, wday=%d\n",
++ __func__,
++ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
++
++ buf[CCR_MDAY] = bin2bcd(tm->tm_mday);
++
++ /* month, 1 - 12 */
++ buf[CCR_MONTH] = bin2bcd(tm->tm_mon);
++
++ /* year, since the rtc epoch*/
++ buf[CCR_YEAR] = bin2bcd(tm->tm_year % 100);
++ buf[CCR_WDAY] = tm->tm_wday & 0x07;
++ buf[CCR_Y2K] = bin2bcd(tm->tm_year / 100);
++ }
++
++ /* If writing alarm registers, set compare bits on registers 0-4 */
++ if (reg_base < ISL12024_CCR_BASE)
++ for (i = 0; i <= 4; i++)
++ buf[i] |= 0x80;
++
++ /* this sequence is required to unlock the chip */
++ if ((xfer = i2c_master_send(client, wel, 3)) != 3) {
++ dev_err(&client->dev, "%s: wel - %d\n", __func__, xfer);
++ return -EIO;
++ }
++
++ if ((xfer = i2c_master_send(client, rwel, 3)) != 3) {
++ dev_err(&client->dev, "%s: rwel - %d\n", __func__, xfer);
++ return -EIO;
++ }
++
++ /* write register's data */
++ if (datetoo)
++ nbytes = 8;
++ else
++ nbytes = 3;
++ for (i = 0; i < nbytes; i++)
++ rdata[2+i] = buf[i];
++
++ xfer = i2c_master_send(client, rdata, nbytes+2);
++ if (xfer != nbytes+2) {
++ dev_err(&client->dev,
++ "%s: result=%d addr=%02x, data=%02x\n",
++ __func__,
++ xfer, rdata[1], rdata[2]);
++ return -EIO;
++ }
++
++ /* If we wrote to the nonvolatile region, wait 10msec for write cycle*/
++ if (reg_base < ISL12024_CCR_BASE) {
++ unsigned char al0e[3] = { 0, ISL12024_REG_INT, 0 };
++
++ msleep(10);
++
++ /* ...and set or clear the AL0E bit in the INT register */
++
++ /* Need to set RWEL again as the write has cleared it */
++ xfer = i2c_master_send(client, rwel, 3);
++ if (xfer != 3) {
++ dev_err(&client->dev,
++ "%s: aloe rwel - %d\n",
++ __func__,
++ xfer);
++ return -EIO;
++ }
++
++ if (alm_enable)
++ al0e[2] = ISL12024_INT_AL0E;
++
++ xfer = i2c_master_send(client, al0e, 3);
++ if (xfer != 3) {
++ dev_err(&client->dev,
++ "%s: al0e - %d\n",
++ __func__,
++ xfer);
++ return -EIO;
++ }
++
++ /* and wait 10msec again for this write to complete */
++ msleep(10);
++ }
++
++ /* disable further writes */
++ if ((xfer = i2c_master_send(client, diswe, 3)) != 3) {
++ dev_err(&client->dev, "%s: diswe - %d\n", __func__, xfer);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++static int isl12024_fix_osc(struct i2c_client *client)
++{
++ int err;
++ struct rtc_time tm;
++
++ tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
++
++ err = isl12024_set_datetime(client, &tm, 0, ISL12024_CCR_BASE, 0);
++ if ( err < 0 )
++ dev_err(&client->dev, "unable to restart the oscillator (%d)\n", err);
++
++ return err;
++}
++
++static int isl12024_rtc_read_time(struct device *dev, struct rtc_time *tm)
++{
++ return isl12024_read_time(to_i2c_client(dev), tm);
++
++}
++
++static int isl12024_rtc_set_time(struct device *dev, struct rtc_time *tm)
++{
++ return isl12024_set_datetime(to_i2c_client(dev),
++ tm, 1, ISL12024_CCR_BASE, 0);
++}
++
++static int
++isl12024_rtc_proc(struct device *dev, struct seq_file *seq)
++{
++
++ /* Nothing to do */
++
++ return 0;
++}
++
++static const struct rtc_class_ops isl12024_rtc_ops = {
++ .proc = isl12024_rtc_proc,
++ .read_time = isl12024_rtc_read_time,
++ .set_time = isl12024_rtc_set_time,
++};
++
++static ssize_t isl12024_show_id(struct device *dev, struct device_attribute *attr,
++ char *buf)
++{
++ struct i2c_client *client = to_i2c_client(dev);
++ int err;
++ int len = 0;
++ int i;
++ u8 id_buffer[ISL12024_RTC_SECTION_LEN];
++
++ /* Read unique id from eeprom */
++ err = isl12024_i2c_read_regs(client, ISL12024_REG_ID, id_buffer, sizeof(id_buffer));
++ if (err < 0) {
++ dev_err(&client->dev, "reading RTC section failed\n");
++ return err;
++ }
++
++ /* Print hexadecimal */
++ for (i = 0; i < sizeof(id_buffer); i++)
++ len += sprintf(buf + len, "%02X", id_buffer[i]);
++ len += sprintf(buf + len, "\n");
++ return len;
++}
++
++static DEVICE_ATTR(id, S_IRUGO, isl12024_show_id, NULL);
++
++static int
++isl12024_probe(struct i2c_client *client, const struct i2c_device_id *id)
++{
++ int rc = 0;
++ unsigned char sr;
++ struct rtc_device *rtc = NULL;
++
++ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
++ return -ENODEV;
++
++ if (isl12024_i2c_validate_client(client) < 0)
++ return -ENODEV;
++
++ dev_info(&client->dev,
++ "chip found, driver version " DRV_VERSION "\n");
++
++ rtc = rtc_device_register(isl12024_driver.driver.name,
++ &client->dev, &isl12024_rtc_ops,
++ THIS_MODULE);
++
++ if (IS_ERR(rtc))
++ return PTR_ERR(rtc);
++
++ i2c_set_clientdata(client, rtc);
++
++ rc = isl12024_get_status(client, &sr);
++ if (rc < 0) {
++ dev_err(&client->dev, "reading status failed\n");
++ goto exit_unregister;
++ }
++
++ /* Check for power failures and enable the osc */
++ if (sr & ISL12024_REG_SR_RTCF) {
++ dev_warn(&client->dev, "rtc power failure detected, "
++ "please set clock.\n");
++ udelay(50);
++ isl12024_fix_osc(client);
++ }
++
++ /* Register sysfs hooks */
++ rc = device_create_file(&client->dev, &dev_attr_id);
++ if (rc < 0)
++ goto exit_unregister;
++
++ return 0;
++
++exit_unregister:
++ rtc_device_unregister(rtc);
++
++ return rc;
++}
++
++static int
++isl12024_remove(struct i2c_client *client)
++{
++ struct rtc_device *rtc = i2c_get_clientdata(client);
++
++ rtc_device_unregister(rtc);
++ device_remove_file(&client->dev, &dev_attr_id);
++
++ return 0;
++}
++
++static const struct i2c_device_id isl12024_id[] = {
++ { "isl12024", 0 },
++ { }
++};
++MODULE_DEVICE_TABLE(i2c, isl12024_id);
++
++static struct i2c_driver isl12024_driver = {
++ .driver = {
++ .name = "rtc-isl12024",
++ },
++ .probe = isl12024_probe,
++ .remove = isl12024_remove,
++ .id_table = isl12024_id,
++};
++
++/* module init/exit */
++
++static int __init isl12024_init(void)
++{
++ return i2c_add_driver(&isl12024_driver);
++}
++
++static void __exit isl12024_exit(void)
++{
++ i2c_del_driver(&isl12024_driver);
++}
++
++MODULE_AUTHOR("Guillaume Ligneul <guillaume.ligneul@cenosys.com>");
++MODULE_DESCRIPTION("Intersil ISL12024 driver");
++MODULE_LICENSE("GPL");
++MODULE_VERSION(DRV_VERSION);
++
++module_init(isl12024_init);
++module_exit(isl12024_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 16:51:54 +0000