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boundary="===============3228720934326301981==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============3228720934326301981== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="v6flhv747vrdixqb" Content-Disposition: inline --v6flhv747vrdixqb Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Aug 28, 2019 at 09:29:32PM +0800, Chen-Yu Tsai wrote: > On Wed, Aug 28, 2019 at 8:52 PM Linus Walleij = wrote: > > > > On Sun, Aug 25, 2019 at 5:06 PM Alejandro Gonz=E1lez > > wrote: > > > > > Jernej Skrabec compared the BSP driver with this > > > driver, and found that the BSP driver configures pinctrl to operate at > > > 1.8 V when entering DDR mode (although 3.3 V operation is supported),= while > > > the mainline kernel lacks any mechanism to switch voltages dynamicall= y. > > AFAIK The Pine H64 does not have the ability to switch I/O voltages. It is > fixed to either 1.8V (the default based on the schematics) or 3.3V. Should that be handled at the board level then maybe? Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --v6flhv747vrdixqb Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXWaFBgAKCRDj7w1vZxhR xUbcAQDTgCwVjSWuZKxoSkt/fp1VLfWi1UjCpSZ0cCr11a5BwAD8DLgodYfexZWL iW8NfsUfcOV7SktdFUgfMP1x74uruwE= =sxYW -----END PGP SIGNATURE----- --v6flhv747vrdixqb-- --===============3228720934326301981== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============3228720934326301981==--