From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/iio/accel/mma8452.c | 141 ++++++++++++++++++++++++++++++++++------------
1 files changed, 103 insertions(+), 38 deletions(-)
diff --git a/kernel/drivers/iio/accel/mma8452.c b/kernel/drivers/iio/accel/mma8452.c
index 1ef75c9..b12e804 100644
--- a/kernel/drivers/iio/accel/mma8452.c
+++ b/kernel/drivers/iio/accel/mma8452.c
@@ -31,6 +31,7 @@
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
#define MMA8452_STATUS 0x00
#define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0))
@@ -107,6 +108,8 @@
u8 data_cfg;
const struct mma_chip_info *chip_info;
int sleep_val;
+ struct regulator *vdd_reg;
+ struct regulator *vddio_reg;
/* Ensure correct alignment of time stamp when present */
struct {
@@ -173,6 +176,7 @@
* @enabled_events: event flags enabled and handled by this driver
*/
struct mma_chip_info {
+ const char *name;
u8 chip_id;
const struct iio_chan_spec *channels;
int num_channels;
@@ -1300,6 +1304,7 @@
static const struct mma_chip_info mma_chip_info_table[] = {
[mma8451] = {
+ .name = "mma8451",
.chip_id = MMA8451_DEVICE_ID,
.channels = mma8451_channels,
.num_channels = ARRAY_SIZE(mma8451_channels),
@@ -1324,6 +1329,7 @@
MMA8452_INT_FF_MT,
},
[mma8452] = {
+ .name = "mma8452",
.chip_id = MMA8452_DEVICE_ID,
.channels = mma8452_channels,
.num_channels = ARRAY_SIZE(mma8452_channels),
@@ -1340,6 +1346,7 @@
MMA8452_INT_FF_MT,
},
[mma8453] = {
+ .name = "mma8453",
.chip_id = MMA8453_DEVICE_ID,
.channels = mma8453_channels,
.num_channels = ARRAY_SIZE(mma8453_channels),
@@ -1356,6 +1363,7 @@
MMA8452_INT_FF_MT,
},
[mma8652] = {
+ .name = "mma8652",
.chip_id = MMA8652_DEVICE_ID,
.channels = mma8652_channels,
.num_channels = ARRAY_SIZE(mma8652_channels),
@@ -1365,6 +1373,7 @@
.enabled_events = MMA8452_INT_FF_MT,
},
[mma8653] = {
+ .name = "mma8653",
.chip_id = MMA8653_DEVICE_ID,
.channels = mma8653_channels,
.num_channels = ARRAY_SIZE(mma8653_channels),
@@ -1379,6 +1388,7 @@
.enabled_events = MMA8452_INT_FF_MT,
},
[fxls8471] = {
+ .name = "fxls8471",
.chip_id = FXLS8471_DEVICE_ID,
.channels = mma8451_channels,
.num_channels = ARRAY_SIZE(mma8451_channels),
@@ -1486,10 +1496,14 @@
int i;
int ret;
- ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2,
+ /*
+ * Find on fxls8471, after config reset bit, it reset immediately,
+ * and will not give ACK, so here do not check the return value.
+ * The following code will read the reset register, and check whether
+ * this reset works.
+ */
+ i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2,
MMA8452_CTRL_REG2_RST);
- if (ret < 0)
- return ret;
for (i = 0; i < 10; i++) {
usleep_range(100, 200);
@@ -1522,13 +1536,6 @@
struct mma8452_data *data;
struct iio_dev *indio_dev;
int ret;
- const struct of_device_id *match;
-
- match = of_match_device(mma8452_dt_ids, &client->dev);
- if (!match) {
- dev_err(&client->dev, "unknown device model\n");
- return -ENODEV;
- }
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
@@ -1537,11 +1544,42 @@
data = iio_priv(indio_dev);
data->client = client;
mutex_init(&data->lock);
- data->chip_info = match->data;
+
+ data->chip_info = device_get_match_data(&client->dev);
+ if (!data->chip_info) {
+ if (id) {
+ data->chip_info = &mma_chip_info_table[id->driver_data];
+ } else {
+ dev_err(&client->dev, "unknown device model\n");
+ return -ENODEV;
+ }
+ }
+
+ data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
+ if (IS_ERR(data->vdd_reg))
+ return dev_err_probe(&client->dev, PTR_ERR(data->vdd_reg),
+ "failed to get VDD regulator!\n");
+
+ data->vddio_reg = devm_regulator_get(&client->dev, "vddio");
+ if (IS_ERR(data->vddio_reg))
+ return dev_err_probe(&client->dev, PTR_ERR(data->vddio_reg),
+ "failed to get VDDIO regulator!\n");
+
+ ret = regulator_enable(data->vdd_reg);
+ if (ret) {
+ dev_err(&client->dev, "failed to enable VDD regulator!\n");
+ return ret;
+ }
+
+ ret = regulator_enable(data->vddio_reg);
+ if (ret) {
+ dev_err(&client->dev, "failed to enable VDDIO regulator!\n");
+ goto disable_regulator_vdd;
+ }
ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
if (ret < 0)
- return ret;
+ goto disable_regulators;
switch (ret) {
case MMA8451_DEVICE_ID:
@@ -1552,18 +1590,18 @@
case FXLS8471_DEVICE_ID:
if (ret == data->chip_info->chip_id)
break;
- /* else: fall through */
+ fallthrough;
default:
- return -ENODEV;
+ ret = -ENODEV;
+ goto disable_regulators;
}
dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n",
- match->compatible, data->chip_info->chip_id);
+ data->chip_info->name, data->chip_info->chip_id);
i2c_set_clientdata(client, indio_dev);
indio_dev->info = &mma8452_info;
- indio_dev->name = id->name;
- indio_dev->dev.parent = &client->dev;
+ indio_dev->name = data->chip_info->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = data->chip_info->channels;
indio_dev->num_channels = data->chip_info->num_channels;
@@ -1571,13 +1609,13 @@
ret = mma8452_reset(client);
if (ret < 0)
- return ret;
+ goto disable_regulators;
data->data_cfg = MMA8452_DATA_CFG_FS_2G;
ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG,
data->data_cfg);
if (ret < 0)
- return ret;
+ goto disable_regulators;
/*
* By default set transient threshold to max to avoid events if
@@ -1586,7 +1624,7 @@
ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS,
MMA8452_TRANSIENT_THS_MASK);
if (ret < 0)
- return ret;
+ goto disable_regulators;
if (client->irq) {
int irq2;
@@ -1600,7 +1638,7 @@
MMA8452_CTRL_REG5,
data->chip_info->all_events);
if (ret < 0)
- return ret;
+ goto disable_regulators;
dev_dbg(&client->dev, "using interrupt line INT1\n");
}
@@ -1609,11 +1647,11 @@
MMA8452_CTRL_REG4,
data->chip_info->enabled_events);
if (ret < 0)
- return ret;
+ goto disable_regulators;
ret = mma8452_trigger_setup(indio_dev);
if (ret < 0)
- return ret;
+ goto disable_regulators;
}
data->ctrl_reg1 = MMA8452_CTRL_ACTIVE |
@@ -1669,12 +1707,19 @@
trigger_cleanup:
mma8452_trigger_cleanup(indio_dev);
+disable_regulators:
+ regulator_disable(data->vddio_reg);
+
+disable_regulator_vdd:
+ regulator_disable(data->vdd_reg);
+
return ret;
}
static int mma8452_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct mma8452_data *data = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
@@ -1685,6 +1730,9 @@
iio_triggered_buffer_cleanup(indio_dev);
mma8452_trigger_cleanup(indio_dev);
mma8452_standby(iio_priv(indio_dev));
+
+ regulator_disable(data->vddio_reg);
+ regulator_disable(data->vdd_reg);
return 0;
}
@@ -1704,6 +1752,18 @@
return -EAGAIN;
}
+ ret = regulator_disable(data->vddio_reg);
+ if (ret) {
+ dev_err(dev, "failed to disable VDDIO regulator\n");
+ return ret;
+ }
+
+ ret = regulator_disable(data->vdd_reg);
+ if (ret) {
+ dev_err(dev, "failed to disable VDD regulator\n");
+ return ret;
+ }
+
return 0;
}
@@ -1713,9 +1773,22 @@
struct mma8452_data *data = iio_priv(indio_dev);
int ret, sleep_val;
+ ret = regulator_enable(data->vdd_reg);
+ if (ret) {
+ dev_err(dev, "failed to enable VDD regulator\n");
+ return ret;
+ }
+
+ ret = regulator_enable(data->vddio_reg);
+ if (ret) {
+ dev_err(dev, "failed to enable VDDIO regulator\n");
+ regulator_disable(data->vdd_reg);
+ return ret;
+ }
+
ret = mma8452_active(data);
if (ret < 0)
- return ret;
+ goto runtime_resume_failed;
ret = mma8452_get_odr_index(data);
sleep_val = 1000 / mma8452_samp_freq[ret][0];
@@ -1725,25 +1798,17 @@
msleep_interruptible(sleep_val);
return 0;
-}
-#endif
-#ifdef CONFIG_PM_SLEEP
-static int mma8452_suspend(struct device *dev)
-{
- return mma8452_standby(iio_priv(i2c_get_clientdata(
- to_i2c_client(dev))));
-}
+runtime_resume_failed:
+ regulator_disable(data->vddio_reg);
+ regulator_disable(data->vdd_reg);
-static int mma8452_resume(struct device *dev)
-{
- return mma8452_active(iio_priv(i2c_get_clientdata(
- to_i2c_client(dev))));
+ return ret;
}
#endif
static const struct dev_pm_ops mma8452_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(mma8452_suspend, mma8452_resume)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(mma8452_runtime_suspend,
mma8452_runtime_resume, NULL)
};
@@ -1762,7 +1827,7 @@
static struct i2c_driver mma8452_driver = {
.driver = {
.name = "mma8452",
- .of_match_table = of_match_ptr(mma8452_dt_ids),
+ .of_match_table = mma8452_dt_ids,
.pm = &mma8452_pm_ops,
},
.probe = mma8452_probe,
--
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