From 9370bb92b2d16684ee45cf24e879c93c509162da Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 19 Dec 2024 01:47:39 +0000
Subject: [PATCH] add wifi6 8852be driver
---
kernel/drivers/rtc/rtc-abx80x.c | 350 +++++++++++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 296 insertions(+), 54 deletions(-)
diff --git a/kernel/drivers/rtc/rtc-abx80x.c b/kernel/drivers/rtc/rtc-abx80x.c
index 2cefa67..803725b 100644
--- a/kernel/drivers/rtc/rtc-abx80x.c
+++ b/kernel/drivers/rtc/rtc-abx80x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* A driver for the I2C members of the Abracon AB x8xx RTC family,
* and compatible: AB 1805 and AB 0805
@@ -5,18 +6,16 @@
* Copyright 2014-2015 Macq S.A.
*
* Author: Philippe De Muyter <phdm@macqel.be>
- * Author: Alexandre Belloni <alexandre.belloni@free-electrons.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * Author: Alexandre Belloni <alexandre.belloni@bootlin.com>
*
*/
#include <linux/bcd.h>
#include <linux/i2c.h>
#include <linux/module.h>
+#include <linux/of_device.h>
#include <linux/rtc.h>
+#include <linux/watchdog.h>
#define ABX8XX_REG_HTH 0x00
#define ABX8XX_REG_SC 0x01
@@ -37,11 +36,16 @@
#define ABX8XX_REG_STATUS 0x0f
#define ABX8XX_STATUS_AF BIT(2)
+#define ABX8XX_STATUS_BLF BIT(4)
+#define ABX8XX_STATUS_WDT BIT(6)
#define ABX8XX_REG_CTRL1 0x10
#define ABX8XX_CTRL_WRITE BIT(0)
#define ABX8XX_CTRL_ARST BIT(2)
#define ABX8XX_CTRL_12_24 BIT(6)
+
+#define ABX8XX_REG_CTRL2 0x11
+#define ABX8XX_CTRL2_RSVD BIT(5)
#define ABX8XX_REG_IRQ 0x12
#define ABX8XX_IRQ_AIE BIT(2)
@@ -61,11 +65,22 @@
#define ABX8XX_OSS_OF BIT(1)
#define ABX8XX_OSS_OMODE BIT(4)
+#define ABX8XX_REG_WDT 0x1b
+#define ABX8XX_WDT_WDS BIT(7)
+#define ABX8XX_WDT_BMB_MASK 0x7c
+#define ABX8XX_WDT_BMB_SHIFT 2
+#define ABX8XX_WDT_MAX_TIME (ABX8XX_WDT_BMB_MASK >> ABX8XX_WDT_BMB_SHIFT)
+#define ABX8XX_WDT_WRB_MASK 0x03
+#define ABX8XX_WDT_WRB_1HZ 0x02
+
#define ABX8XX_REG_CFG_KEY 0x1f
#define ABX8XX_CFG_KEY_OSC 0xa1
#define ABX8XX_CFG_KEY_MISC 0x9d
#define ABX8XX_REG_ID0 0x28
+
+#define ABX8XX_REG_OUT_CTRL 0x30
+#define ABX8XX_OUT_CTRL_EXDS BIT(4)
#define ABX8XX_REG_TRICKLE 0x20
#define ABX8XX_TRICKLE_CHARGE_ENABLE 0xa0
@@ -75,23 +90,31 @@
static u8 trickle_resistors[] = {0, 3, 6, 11};
enum abx80x_chip {AB0801, AB0803, AB0804, AB0805,
- AB1801, AB1803, AB1804, AB1805, ABX80X};
+ AB1801, AB1803, AB1804, AB1805, RV1805, ABX80X};
struct abx80x_cap {
u16 pn;
bool has_tc;
+ bool has_wdog;
};
static struct abx80x_cap abx80x_caps[] = {
[AB0801] = {.pn = 0x0801},
[AB0803] = {.pn = 0x0803},
- [AB0804] = {.pn = 0x0804, .has_tc = true},
- [AB0805] = {.pn = 0x0805, .has_tc = true},
+ [AB0804] = {.pn = 0x0804, .has_tc = true, .has_wdog = true},
+ [AB0805] = {.pn = 0x0805, .has_tc = true, .has_wdog = true},
[AB1801] = {.pn = 0x1801},
[AB1803] = {.pn = 0x1803},
- [AB1804] = {.pn = 0x1804, .has_tc = true},
- [AB1805] = {.pn = 0x1805, .has_tc = true},
+ [AB1804] = {.pn = 0x1804, .has_tc = true, .has_wdog = true},
+ [AB1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
+ [RV1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
[ABX80X] = {.pn = 0}
+};
+
+struct abx80x_priv {
+ struct rtc_device *rtc;
+ struct i2c_client *client;
+ struct watchdog_device wdog;
};
static int abx80x_is_rc_mode(struct i2c_client *client)
@@ -218,7 +241,8 @@
static irqreturn_t abx80x_handle_irq(int irq, void *dev_id)
{
struct i2c_client *client = dev_id;
- struct rtc_device *rtc = i2c_get_clientdata(client);
+ struct abx80x_priv *priv = i2c_get_clientdata(client);
+ struct rtc_device *rtc = priv->rtc;
int status;
status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
@@ -227,6 +251,13 @@
if (status & ABX8XX_STATUS_AF)
rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
+
+ /*
+ * It is unclear if we'll get an interrupt before the external
+ * reset kicks in.
+ */
+ if (status & ABX8XX_STATUS_WDT)
+ dev_alert(&client->dev, "watchdog timeout interrupt.\n");
i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);
@@ -371,7 +402,7 @@
return -EINVAL;
}
- retval = abx80x_rtc_set_autocalibration(dev, autocalibration);
+ retval = abx80x_rtc_set_autocalibration(dev->parent, autocalibration);
return retval ? retval : count;
}
@@ -381,7 +412,7 @@
{
int autocalibration = 0;
- autocalibration = abx80x_rtc_get_autocalibration(dev);
+ autocalibration = abx80x_rtc_get_autocalibration(dev->parent);
if (autocalibration < 0) {
dev_err(dev, "Failed to read RTC autocalibration\n");
sprintf(buf, "0\n");
@@ -397,7 +428,7 @@
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
int retval, flags, rc_mode = 0;
if (strncmp(buf, "rc", 2) == 0) {
@@ -439,7 +470,7 @@
struct device_attribute *attr, char *buf)
{
int rc_mode = 0;
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
rc_mode = abx80x_is_rc_mode(client);
@@ -482,16 +513,51 @@
return err;
}
+static int abx80x_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int status, tmp;
+
+ switch (cmd) {
+ case RTC_VL_READ:
+ status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
+ if (status < 0)
+ return status;
+
+ tmp = status & ABX8XX_STATUS_BLF ? RTC_VL_BACKUP_LOW : 0;
+
+ return put_user(tmp, (unsigned int __user *)arg);
+
+ case RTC_VL_CLR:
+ status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
+ if (status < 0)
+ return status;
+
+ status &= ~ABX8XX_STATUS_BLF;
+
+ tmp = i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);
+ if (tmp < 0)
+ return tmp;
+
+ return 0;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
static const struct rtc_class_ops abx80x_rtc_ops = {
.read_time = abx80x_rtc_read_time,
.set_time = abx80x_rtc_set_time,
.read_alarm = abx80x_read_alarm,
.set_alarm = abx80x_set_alarm,
.alarm_irq_enable = abx80x_alarm_irq_enable,
+ .ioctl = abx80x_ioctl,
};
-static int abx80x_dt_trickle_cfg(struct device_node *np)
+static int abx80x_dt_trickle_cfg(struct i2c_client *client)
{
+ struct device_node *np = client->dev.of_node;
const char *diode;
int trickle_cfg = 0;
int i, ret;
@@ -501,12 +567,14 @@
if (ret)
return ret;
- if (!strcmp(diode, "standard"))
+ if (!strcmp(diode, "standard")) {
trickle_cfg |= ABX8XX_TRICKLE_STANDARD_DIODE;
- else if (!strcmp(diode, "schottky"))
+ } else if (!strcmp(diode, "schottky")) {
trickle_cfg |= ABX8XX_TRICKLE_SCHOTTKY_DIODE;
- else
+ } else {
+ dev_dbg(&client->dev, "Invalid tc-diode value: %s\n", diode);
return -EINVAL;
+ }
ret = of_property_read_u32(np, "abracon,tc-resistor", &tmp);
if (ret)
@@ -516,24 +584,102 @@
if (trickle_resistors[i] == tmp)
break;
- if (i == sizeof(trickle_resistors))
+ if (i == sizeof(trickle_resistors)) {
+ dev_dbg(&client->dev, "Invalid tc-resistor value: %u\n", tmp);
return -EINVAL;
+ }
return (trickle_cfg | i);
}
-static void rtc_calib_remove_sysfs_group(void *_dev)
-{
- struct device *dev = _dev;
+#ifdef CONFIG_WATCHDOG
- sysfs_remove_group(&dev->kobj, &rtc_calib_attr_group);
+static inline u8 timeout_bits(unsigned int timeout)
+{
+ return ((timeout << ABX8XX_WDT_BMB_SHIFT) & ABX8XX_WDT_BMB_MASK) |
+ ABX8XX_WDT_WRB_1HZ;
}
+
+static int __abx80x_wdog_set_timeout(struct watchdog_device *wdog,
+ unsigned int timeout)
+{
+ struct abx80x_priv *priv = watchdog_get_drvdata(wdog);
+ u8 val = ABX8XX_WDT_WDS | timeout_bits(timeout);
+
+ /*
+ * Writing any timeout to the WDT register resets the watchdog timer.
+ * Writing 0 disables it.
+ */
+ return i2c_smbus_write_byte_data(priv->client, ABX8XX_REG_WDT, val);
+}
+
+static int abx80x_wdog_set_timeout(struct watchdog_device *wdog,
+ unsigned int new_timeout)
+{
+ int err = 0;
+
+ if (watchdog_hw_running(wdog))
+ err = __abx80x_wdog_set_timeout(wdog, new_timeout);
+
+ if (err == 0)
+ wdog->timeout = new_timeout;
+
+ return err;
+}
+
+static int abx80x_wdog_ping(struct watchdog_device *wdog)
+{
+ return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
+}
+
+static int abx80x_wdog_start(struct watchdog_device *wdog)
+{
+ return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
+}
+
+static int abx80x_wdog_stop(struct watchdog_device *wdog)
+{
+ return __abx80x_wdog_set_timeout(wdog, 0);
+}
+
+static const struct watchdog_info abx80x_wdog_info = {
+ .identity = "abx80x watchdog",
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+};
+
+static const struct watchdog_ops abx80x_wdog_ops = {
+ .owner = THIS_MODULE,
+ .start = abx80x_wdog_start,
+ .stop = abx80x_wdog_stop,
+ .ping = abx80x_wdog_ping,
+ .set_timeout = abx80x_wdog_set_timeout,
+};
+
+static int abx80x_setup_watchdog(struct abx80x_priv *priv)
+{
+ priv->wdog.parent = &priv->client->dev;
+ priv->wdog.ops = &abx80x_wdog_ops;
+ priv->wdog.info = &abx80x_wdog_info;
+ priv->wdog.min_timeout = 1;
+ priv->wdog.max_timeout = ABX8XX_WDT_MAX_TIME;
+ priv->wdog.timeout = ABX8XX_WDT_MAX_TIME;
+
+ watchdog_set_drvdata(&priv->wdog, priv);
+
+ return devm_watchdog_register_device(&priv->client->dev, &priv->wdog);
+}
+#else
+static int abx80x_setup_watchdog(struct abx80x_priv *priv)
+{
+ return 0;
+}
+#endif
static int abx80x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device_node *np = client->dev.of_node;
- struct rtc_device *rtc;
+ struct abx80x_priv *priv;
int i, data, err, trickle_cfg = -EINVAL;
char buf[7];
unsigned int part = id->driver_data;
@@ -577,6 +723,62 @@
return -EIO;
}
+ /* Configure RV1805 specifics */
+ if (part == RV1805) {
+ /*
+ * Avoid accidentally entering test mode. This can happen
+ * on the RV1805 in case the reserved bit 5 in control2
+ * register is set. RV-1805-C3 datasheet indicates that
+ * the bit should be cleared in section 11h - Control2.
+ */
+ data = i2c_smbus_read_byte_data(client, ABX8XX_REG_CTRL2);
+ if (data < 0) {
+ dev_err(&client->dev,
+ "Unable to read control2 register\n");
+ return -EIO;
+ }
+
+ err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CTRL2,
+ data & ~ABX8XX_CTRL2_RSVD);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "Unable to write control2 register\n");
+ return -EIO;
+ }
+
+ /*
+ * Avoid extra power leakage. The RV1805 uses smaller
+ * 10pin package and the EXTI input is not present.
+ * Disable it to avoid leakage.
+ */
+ data = i2c_smbus_read_byte_data(client, ABX8XX_REG_OUT_CTRL);
+ if (data < 0) {
+ dev_err(&client->dev,
+ "Unable to read output control register\n");
+ return -EIO;
+ }
+
+ /*
+ * Write the configuration key register to enable access to
+ * the config2 register
+ */
+ err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
+ ABX8XX_CFG_KEY_MISC);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "Unable to write configuration key\n");
+ return -EIO;
+ }
+
+ err = i2c_smbus_write_byte_data(client, ABX8XX_REG_OUT_CTRL,
+ data | ABX8XX_OUT_CTRL_EXDS);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "Unable to write output control register\n");
+ return -EIO;
+ }
+ }
+
/* part autodetection */
if (part == ABX80X) {
for (i = 0; abx80x_caps[i].pn; i++)
@@ -597,7 +799,7 @@
}
if (np && abx80x_caps[part].has_tc)
- trickle_cfg = abx80x_dt_trickle_cfg(np);
+ trickle_cfg = abx80x_dt_trickle_cfg(client);
if (trickle_cfg > 0) {
dev_info(&client->dev, "Enabling trickle charger: %02x\n",
@@ -610,13 +812,24 @@
if (err)
return err;
- rtc = devm_rtc_allocate_device(&client->dev);
- if (IS_ERR(rtc))
- return PTR_ERR(rtc);
+ priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
- rtc->ops = &abx80x_rtc_ops;
+ priv->rtc = devm_rtc_allocate_device(&client->dev);
+ if (IS_ERR(priv->rtc))
+ return PTR_ERR(priv->rtc);
- i2c_set_clientdata(client, rtc);
+ priv->rtc->ops = &abx80x_rtc_ops;
+ priv->client = client;
+
+ i2c_set_clientdata(client, priv);
+
+ if (abx80x_caps[part].has_wdog) {
+ err = abx80x_setup_watchdog(priv);
+ if (err)
+ return err;
+ }
if (client->irq > 0) {
dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
@@ -631,32 +844,14 @@
}
}
- /* Export sysfs entries */
- err = sysfs_create_group(&(&client->dev)->kobj, &rtc_calib_attr_group);
+ err = rtc_add_group(priv->rtc, &rtc_calib_attr_group);
if (err) {
dev_err(&client->dev, "Failed to create sysfs group: %d\n",
err);
return err;
}
- err = devm_add_action_or_reset(&client->dev,
- rtc_calib_remove_sysfs_group,
- &client->dev);
- if (err) {
- dev_err(&client->dev,
- "Failed to add sysfs cleanup action: %d\n",
- err);
- return err;
- }
-
- err = rtc_register_device(rtc);
-
- return err;
-}
-
-static int abx80x_remove(struct i2c_client *client)
-{
- return 0;
+ return rtc_register_device(priv->rtc);
}
static const struct i2c_device_id abx80x_id[] = {
@@ -669,23 +864,70 @@
{ "ab1803", AB1803 },
{ "ab1804", AB1804 },
{ "ab1805", AB1805 },
- { "rv1805", AB1805 },
+ { "rv1805", RV1805 },
{ }
};
MODULE_DEVICE_TABLE(i2c, abx80x_id);
+#ifdef CONFIG_OF
+static const struct of_device_id abx80x_of_match[] = {
+ {
+ .compatible = "abracon,abx80x",
+ .data = (void *)ABX80X
+ },
+ {
+ .compatible = "abracon,ab0801",
+ .data = (void *)AB0801
+ },
+ {
+ .compatible = "abracon,ab0803",
+ .data = (void *)AB0803
+ },
+ {
+ .compatible = "abracon,ab0804",
+ .data = (void *)AB0804
+ },
+ {
+ .compatible = "abracon,ab0805",
+ .data = (void *)AB0805
+ },
+ {
+ .compatible = "abracon,ab1801",
+ .data = (void *)AB1801
+ },
+ {
+ .compatible = "abracon,ab1803",
+ .data = (void *)AB1803
+ },
+ {
+ .compatible = "abracon,ab1804",
+ .data = (void *)AB1804
+ },
+ {
+ .compatible = "abracon,ab1805",
+ .data = (void *)AB1805
+ },
+ {
+ .compatible = "microcrystal,rv1805",
+ .data = (void *)RV1805
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, abx80x_of_match);
+#endif
+
static struct i2c_driver abx80x_driver = {
.driver = {
.name = "rtc-abx80x",
+ .of_match_table = of_match_ptr(abx80x_of_match),
},
.probe = abx80x_probe,
- .remove = abx80x_remove,
.id_table = abx80x_id,
};
module_i2c_driver(abx80x_driver);
MODULE_AUTHOR("Philippe De Muyter <phdm@macqel.be>");
-MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>");
+MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@bootlin.com>");
MODULE_DESCRIPTION("Abracon ABX80X RTC driver");
MODULE_LICENSE("GPL v2");
--
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