Commit 51fc72e5 authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

media: ccs: Wait until software reset is done 



Verify the software reset has been completed until proceeding.

The spec does not guarantee a delay but presumably 100 ms should be
enough.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent e1988e7a

drivers/media/i2c/ccs/ccs-core.c

+15 −0
Original line number Diff line number Diff line
@@ -1553,11 +1553,26 @@ static int ccs_power_on(struct device *dev) 
	 */



	if (!sensor->reset && !sensor->xshutdown) {

		u8 retry = 100;

		u32 reset;



		rval = ccs_write(sensor, SOFTWARE_RESET, CCS_SOFTWARE_RESET_ON);

		if (rval < 0) {

			dev_err(dev, "software reset failed\n");

			goto out_cci_addr_fail;

		}



		do {

			rval = ccs_read(sensor, SOFTWARE_RESET, &reset);

			reset = !rval && reset == CCS_SOFTWARE_RESET_OFF;

			if (reset)

				break;



			usleep_range(1000, 2000);

		} while (--retry);



		if (!reset)

			return -EIO;

	}



	if (sensor->hwcfg.i2c_addr_alt) {