From: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
To: jic23@kernel.org, linux-iio@vger.kernel.org
Cc: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Subject: [PATCH 06/13] iio: imu: inv_mpu6050: add all signal path resets at init
Date: Wed, 12 Feb 2020 18:40:41 +0100 [thread overview]
Message-ID: <20200212174048.1034-7-jmaneyrol@invensense.com> (raw)
In-Reply-To: <20200212174048.1034-1-jmaneyrol@invensense.com>
Old chips using spi require for a full reset to manually reset
all signal path. This does not harm when using i2c so do it
inconditionally. Exclude i2c only chips.
Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
---
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 18 ++++++++++++++++++
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 6 ++++++
2 files changed, 24 insertions(+)
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 85872e55154f..3502b996671c 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -1146,6 +1146,24 @@ static int inv_check_and_setup_chip(struct inv_mpu6050_state *st)
if (result)
return result;
msleep(INV_MPU6050_POWER_UP_TIME);
+ switch (st->chip_type) {
+ case INV_MPU6000:
+ case INV_MPU6500:
+ case INV_MPU6515:
+ case INV_MPU9250:
+ case INV_MPU9255:
+ /* reset signal path (required for spi connection) */
+ regval = INV_MPU6050_BIT_TEMP_RST | INV_MPU6050_BIT_ACCEL_RST |
+ INV_MPU6050_BIT_GYRO_RST;
+ result = regmap_write(st->map, INV_MPU6050_REG_SIGNAL_PATH_RESET,
+ regval);
+ if (result)
+ return result;
+ msleep(INV_MPU6050_POWER_UP_TIME);
+ break;
+ default:
+ break;
+ }
/*
* Turn power on. After reset, the sleep bit could be on
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index d5edf903c076..17f1f6a15f95 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -245,7 +245,13 @@ struct inv_mpu6050_state {
#define INV_MPU6050_BIT_I2C_SLV3_DLY_EN 0x08
#define INV_MPU6050_BIT_DELAY_ES_SHADOW 0x80
+#define INV_MPU6050_REG_SIGNAL_PATH_RESET 0x68
+#define INV_MPU6050_BIT_TEMP_RST BIT(0)
+#define INV_MPU6050_BIT_ACCEL_RST BIT(1)
+#define INV_MPU6050_BIT_GYRO_RST BIT(2)
+
#define INV_MPU6050_REG_USER_CTRL 0x6A
+#define INV_MPU6050_BIT_SIG_COND_RST 0x01
#define INV_MPU6050_BIT_FIFO_RST 0x04
#define INV_MPU6050_BIT_DMP_RST 0x08
#define INV_MPU6050_BIT_I2C_MST_EN 0x20
--
2.17.1
next prev parent reply other threads:[~2020-02-12 17:41 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 17:40 [PATCH 00/13] Rework sensors engines and power management Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 01/13] iio: imu: inv_mpu6050: enable i2c aux mux bypass only once Jean-Baptiste Maneyrol
2020-02-15 17:30 ` Jonathan Cameron
2020-02-18 16:03 ` Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 02/13] iio: imu: inv_mpu6050: delete useless check Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 03/13] iio: imu: inv_mpu6050: set power on/off only once during all init Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 04/13] iio: imu: inv_mpu6050: simplify polling magnetometer Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 05/13] iio: imu: inv_mpu6050: early init of chip_config for use at setup Jean-Baptiste Maneyrol
2020-02-12 17:40 ` Jean-Baptiste Maneyrol [this message]
2020-02-12 17:40 ` [PATCH 07/13] iio: imu: inv_mpu6050: fix sleep time when turning regulators on Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 08/13] iio: imu: inv_mpu6050: rewrite power and engine management Jean-Baptiste Maneyrol
2020-02-15 18:09 ` Jonathan Cameron
2020-02-12 17:40 ` [PATCH 09/13] iio: imu: inv_mpu6050: fix data polling interface Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 10/13] iio: imu: inv_mpu6050: factorize fifo enable/disable Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 11/13] iio: imu: inv_mpu6050: dynamic sampling rate change Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 12/13] iio: imu: inv_mpu6050: use runtime pm with autosuspend Jean-Baptiste Maneyrol
2020-02-15 18:22 ` Jonathan Cameron
2020-02-18 16:44 ` Jean-Baptiste Maneyrol
2020-02-12 17:40 ` [PATCH 13/13] iio: imu: inv_mpu6050: temperature only work with accel/gyro Jean-Baptiste Maneyrol
2020-02-15 18:23 ` Jonathan Cameron
2020-02-18 16:46 ` Jean-Baptiste Maneyrol
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200212174048.1034-7-jmaneyrol@invensense.com \
--to=jmaneyrol@invensense.com \
--cc=jic23@kernel.org \
--cc=linux-iio@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.