michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers/sensor: lsm6dso: Remove busy wait on bank change

Browse source 
It's not necessary to busy wait 150 µs after changing register banks.
Nothing in the data sheet nor app note suggests this.  ST's own HAL,
which is used by this driver, does not delay when changing banks.  It
does a bank change around every function that accesses a non-user bank
register (it's quite inefficient).

So if it was necessary it would be broken now, as most of the bank
changes have no delay.

One of the few page changes that did have this delay are the those done
before and after reading a sensor sample.  Which is where the speed is
significant and is limiting the update rate the driver is capable of.

Signed-off-by: Trent Piepho <trent.piepho@igorinstitute.com>
This commit is contained in:
Trent Piepho 2022-12-21 05:20:30 -08:00 • committed by Lauren Murphy
commit c45bc68e5c
1 changed files with 0 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/sensor/lsm6dso/lsm6dso_shub.c
View file

@ -446,8 +446,6 @@ static inline void lsm6dso_shub_embedded_en(stmdev_ctx_t *ctx, bool on)
};
lsm6dso_write_reg(ctx, LSM6DSO_FUNC_CFG_ACCESS, (uint8_t *)&reg, 1);
k_busy_wait(150);
}
static int lsm6dso_shub_read_embedded_regs(stmdev_ctx_t *ctx,