From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [PATCH v4] i2c: s3c2410: dont need CPU_FREQ transitions for exynos series Date: Fri, 3 Jan 2014 17:23:52 +0100 Message-ID: <20140103162351.GI7132@katana> References: <1381490814-20890-1-git-send-email-ch.naveen@samsung.com> <1385439767-18586-1-git-send-email-ch.naveen@samsung.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="VaKJWhUROU/xPxjb" Return-path: Content-Disposition: inline In-Reply-To: <1385439767-18586-1-git-send-email-ch.naveen-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Naveen Krishna Chatradhi Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, sjg-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org, grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org, broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org, cpgs-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, t.figa-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org List-Id: linux-i2c@vger.kernel.org --VaKJWhUROU/xPxjb Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Nov 26, 2013 at 09:52:46AM +0530, Naveen Krishna Chatradhi wrote: > For Exynos4 and Exynos5 SoCs from Samsung the i2c clock is based > on a fixed 66 MHz peripheral clock, and therefore is completely > independent of the cpu frequency. > Thus, registering for a CPU freq notifier is very wasteful. >=20 > This patch modifes the code such that, i2c bus registers to > cpu_freq_transition only if CONFIG_CPU_FREQ_S3C24XX is enabled. >=20 > This change should save a bunch of cpufreq transitions calls > which does not apply to exynos SoCs. >=20 > Signed-off-by: Naveen Krishna Chatradhi > Acked-by: Kyungmin Park > Reviewed-by: Doug Anderson Applied to for-next, thanks! --VaKJWhUROU/xPxjb Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iQIcBAEBAgAGBQJSxuQXAAoJEBQN5MwUoCm23DgP+wTf3YlfmOrh7G+lpYvsgqxQ r16o7AOEnjZbJkOE1sN6LNcrCiH/4jAJE756ZBZZGTSzQh6FAb0UPi8abUp18Rzq wpsndT//AyhoZKaO6E4qnj67089jqZc2C83+xZrvHJjxXokIz4kfB7yVfHJEsViK Wpxtgt7mOxDSF/FAul+ayEw+lSblTBT3y+xF1oLcLPvgl8iMpdzwLSuXkFmrQALO 4hvOLEh1hfeYafwN8AYMcvgZAttJBrpjDjy4dVScGdQd4RdB0zUCFcSSdonCsBlb Hj8ZOSirqN45S6LO7njJL7nImcYmU/r0+atdKHiHKSpayqJBi74OURNciaUmSSSX lBFDg0e5Mw41QYryqSmxfbXO7VaF+SNZ9KzApk64MHCFbTNaYrhaColOsFHMu0Xx 1fB4wQJD2xFhTQP7Da9uZEpytoq4Vay5TBEMGYiPwQ/u/+Z8E5giZYjoMzgzP2Ki 4zzlSiGEd0NiZLa7OuIvA7eIrZmEKrWD7rEesSCm5OEO7MHZnRcKEn7bdOlRgGsL 8yAjyKCiSLeCmepG4MlR99obIPuK4cp4oEm622orV/Yc2kaMUXRMrGzSYIbtlrBH g6hIJQRTaZdqAsqS/kSm1ShjoXwj/QhpXBnpwXWKbmBc3rprkfx+mUEEDuLBEEHZ btRMTWVtR7dL+YSPOpBU =+/YN -----END PGP SIGNATURE----- --VaKJWhUROU/xPxjb--