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The driver currently uses udelay(MMS114_I2C_DELAY) (50us) to ensure a mandatory delay between I2C transfers in __mms114_read_reg() and mms114_write_reg(). Both functions invoke underlying I2C core operations (i2c_transfer, i2c_master_send) which acquire mutexes and sleep. Furthermore, the interrupt handler mms114_interrupt() is registered as a threaded IRQ handler. Since the entire execution path is fully sleepable, busy-waiting with udelay() for 50us unnecessarily wastes CPU cycles. Replace udelay() with usleep_range() to allow the CPU to enter low-power states or execute other tasks during the delay. Assisted-by: Antigravity:gemini-3.5-flash Link: https://patch.msgid.link/20260616050912.1531241-4-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>