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Subject[PATCH 2/7] iio: inv_mpu6050: Initial regcache support
Date
Signed-off-by: Crestez Dan Leonard <leonard.crestez@intel.com>
---
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 47 ++++++++++++++++++++++++++++++
drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c | 5 ----
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 1 +
drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c | 5 ----
4 files changed, 48 insertions(+), 10 deletions(-)

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index b269b37..5918c23 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -116,6 +116,53 @@ static const struct inv_mpu6050_hw hw_info[] = {
},
};

+static bool inv_mpu6050_volatile_reg(struct device *dev, unsigned int reg)
+{
+ if (reg >= INV_MPU6050_REG_RAW_ACCEL && reg < INV_MPU6050_REG_RAW_ACCEL + 6)
+ return true;
+ if (reg >= INV_MPU6050_REG_RAW_GYRO && reg < INV_MPU6050_REG_RAW_GYRO + 6)
+ return true;
+ switch (reg) {
+ case INV_MPU6050_REG_TEMPERATURE:
+ case INV_MPU6050_REG_TEMPERATURE + 1:
+ case INV_MPU6050_REG_USER_CTRL:
+ case INV_MPU6050_REG_PWR_MGMT_1:
+ case INV_MPU6050_REG_FIFO_COUNT_H:
+ case INV_MPU6050_REG_FIFO_COUNT_H + 1:
+ case INV_MPU6050_REG_FIFO_R_W:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool inv_mpu6050_precious_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case INV_MPU6050_REG_FIFO_R_W:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/*
+ * Common regmap config for inv_mpu devices
+ *
+ * The current volatile/precious registers are common among supported devices.
+ * When that changes the volatile/precious callbacks should go through the
+ * inv_mpu6050_reg_map structs.
+ */
+const struct regmap_config inv_mpu_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = inv_mpu6050_volatile_reg,
+ .precious_reg = inv_mpu6050_precious_reg,
+};
+EXPORT_SYMBOL_GPL(inv_mpu_regmap_config);
+
int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
{
unsigned int d, mgmt_1;
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
index 1a424a6..1a8d1a5 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
@@ -20,11 +20,6 @@
#include <linux/module.h>
#include "inv_mpu_iio.h"

-static const struct regmap_config inv_mpu_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
-};
-
/*
* The i2c read/write needs to happen in unlocked mode. As the parent
* adapter is common. If we use locked versions, it will fail as
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index 47ca25b..297b0ef 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -291,3 +291,4 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
int inv_mpu_core_remove(struct device *dev);
int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on);
extern const struct dev_pm_ops inv_mpu_pmops;
+extern const struct regmap_config inv_mpu_regmap_config;
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
index 190a4a5..b3bd977 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
@@ -17,11 +17,6 @@
#include <linux/iio/iio.h>
#include "inv_mpu_iio.h"

-static const struct regmap_config inv_mpu_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
-};
-
static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
{
struct inv_mpu6050_state *st = iio_priv(indio_dev);
--
2.5.5
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