42 lines
1.2 KiB
Diff
42 lines
1.2 KiB
Diff
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From 081df7f8582115c7b87f3516946acb829a1aa357 Mon Sep 17 00:00:00 2001
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From: Sergey Larin <cerg2010cerg2010@mail.ru>
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Date: Sat, 26 Jan 2019 19:27:36 +0300
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Subject: [PATCH 04/34] iio: gyro: mpu3050: get chip ID correctly
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According to the datasheet, the first bit of CHIP_ID register specifies
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the I2C bus state, and the last one does not belong to ID. Handle this
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correctly.
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Signed-off-by: Sergey Larin <cerg2010cerg2010@mail.ru>
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---
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drivers/iio/gyro/mpu3050-core.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/drivers/iio/gyro/mpu3050-core.c b/drivers/iio/gyro/mpu3050-core.c
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index 77fac81a3adc..0c541cbf13a4 100644
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--- a/drivers/iio/gyro/mpu3050-core.c
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+++ b/drivers/iio/gyro/mpu3050-core.c
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@@ -29,7 +29,7 @@
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#include "mpu3050.h"
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-#define MPU3050_CHIP_ID 0x69
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+#define MPU3050_CHIP_ID 0x68
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/*
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* Register map: anything suffixed *_H is a big-endian high byte and always
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@@ -1176,8 +1176,8 @@ int mpu3050_common_probe(struct device *dev,
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goto err_power_down;
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}
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- if (val != MPU3050_CHIP_ID) {
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- dev_err(dev, "unsupported chip id %02x\n", (u8)val);
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+ if ((val & 0x7E) != MPU3050_CHIP_ID) {
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+ dev_err(dev, "unsupported chip id %02x\n", (u8)(val & 0x7E));
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ret = -ENODEV;
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goto err_power_down;
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}
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--
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2.20.1
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