pwm: Fixes for v5.4-rc6

It turned out that relying solely on drivers storing all the PWM state
 in hardware was a little premature and causes a number of subtle (and
 some not so subtle) regressions. Revert the offending patch for now.
 -----BEGIN PGP SIGNATURE-----
 
 iQJNBAABCAA3FiEEiOrDCAFJzPfAjcif3SOs138+s6EFAl29iFkZHHRoaWVycnku
 cmVkaW5nQGdtYWlsLmNvbQAKCRDdI6zXfz6zoUYRD/9TkWdcPQC9ogaOdys+JZbL
 ofSiKns9LzuptKw1CeAI2yfNak/lu/NwMBiYOwxJHYPv8d127HvRPTPVWzFT5Ho2
 F6fBgg3lCIGRPkXPX0Pz7rRscRPIcPYKnleEl+O5xxY0GrlRYlKsBIpihCkQSlYK
 YUsbZ//juTBeHyHGYqmAoYKUxs9PZgah/a4xwP3++7lP9GKJDHbuhb8qk5eSZa4H
 6YDitt9P4b1azgruPv4kzZ2qHITRcvolC9LwaCGTmg2mExkvmqewjLCgbEyYD+Ga
 pQ37POKiez3Y0le0uSlss+0cUXT0qzO9Oo1yCzeKbzHw1Y8oiRUpTAD/3874AlNG
 ydb9XDVfFt12EulIZ7PlxCRHUZcu17CGiECMoTF53RQClzzOB74feEtPb5GD6B9N
 CTEWoYWt13xzn/OdQh3535zKdJdqBEBDNwwEad8N/M8+XQbGXqjeEGlsn0Zus5nr
 5ZVPBUtYJQALsMZMzpI+OY1OLczn5SeXhKPIXZbzD9honcY9lBk1k8t0Bwp/AD9q
 IUyFfrDFC6O1nRxUVG8l3GaZvNY6vb9tYLKtKqOZX1yoKLwmJ9afKZ4QeB1MQieg
 vh9doC3NoBfYgeJwcF78Nh/8qpFqz7Jy0+U6XuwEUdV/CqT24QSQ0DFWZlBnu8sN
 J0C+c+tttfSy5vFYE/1Bqg==
 =Hf3E
 -----END PGP SIGNATURE-----

Merge tag 'pwm/for-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm fixes from Thierry Reding:
 "It turned out that relying solely on drivers storing all the PWM state
  in hardware was a little premature and causes a number of subtle (and
  some not so subtle) regressions. Revert the offending patch for now"

* tag 'pwm/for-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
  Revert "pwm: Let pwm_get_state() return the last implemented state"

drivers/pwm/core.c

@@ -472,14 +472,7 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
 		if (err)
 			return err;
 
-		/*
-		 * .apply might have to round some values in *state, if possible
-		 * read the actually implemented value back.
-		 */
-		if (chip->ops->get_state)
-			chip->ops->get_state(chip, pwm, &pwm->state);
-		else
-			pwm->state = *state;
+		pwm->state = *state;
 	} else {
 		/*
 		 * FIXME: restore the initial state in case of error.