From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Date: Mon, 06 Oct 2014 09:01:50 +0000 Subject: Re: [PATCH] [RFC] ARM: shmobile: Add early debugging support using SCIF(A) Message-Id: <20141006090149.GC1266@katana> MIME-Version: 1 Content-Type: multipart/mixed; boundary="GPJrCs/72TxItFYR" List-Id: References: <1412276563-21473-1-git-send-email-geert+renesas@glider.be> <2257006.dpJJ6zLgnP@avalon> <20141006060347.GB1266@katana> In-Reply-To: To: linux-arm-kernel@lists.infradead.org --GPJrCs/72TxItFYR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > I agree with your statement about using the same wires. > However, having the ability to pinmux both SCIF0 and SCIFA0 to the same > wires is not a board property, but an SoC property, right? Both. The SoC needs to support muxing them to the same wires, yes. But the board must also support it. E.g. SCIFA0 could already be used using some other wires, then it is not possible anymore. > Nevertheless, for DEBUG_LL, this is early debug output, so it should use the > exact same settings as the bootloader, which has configured SCIF0, and > (b) has setup pinmux for SCIF0. True. --GPJrCs/72TxItFYR Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUMlp9AAoJEBQN5MwUoCm2FFQP/2uX5L3ndoBflaBrXOA9Hu7n VnmnkbE+gzSVbGBA40B7ZqR6jDZ1RyqeNGcu2gy+wIqy5oNpNogsuk4/CVi3iv3f vlYQWrcsF7nFEOnt3XnBRH0VlK51sT/Y7SzAwxzNyNWW7OZVDbA0cLxkqJqwvvf2 rWeTctoJF+MKUwJbNIlsvbN23l7obYlxK6iNkzzIg3/yIUApUmnVG0EgsBk+ut+p 6IS76c6d3n0Wwmta4rZuThJYaydwC6FHIS0/PXIEocrbRdYtXqU1dUFy5lxVuUif GdOB3OdzvXJ+9HFDoxb2rWMNFwH75v8Mp5UlE0lupgnWWwA2I0C4aT4qtPaxUxjI eJMLgu5yxwLO90khoSPgdNNBxRsYT+HUSOGKbr/22IiYDD/otxugw6husdvLr/OH cFMMCHPHJ3FbdifVEvwyf0C7j8jxyYUjf2Hz4BOxMe+p6ghMi6vJw34LfN7/W3N9 DZkEujHAKa44+Sjq/9ggGChNM2dA6qixWJwei0qdX/JSo9+/1IVG/Ht4xW0nC62r eHgSVKHRm1Vqa5H0mbVMRe4GiU86ltrkH/OBx1abSJN6LWAEtUP2I0iwwRLleL9o WtWBZJzGV0iVi98/lYinhrc+pNBfYsHnav5nTxzsDEHq/MHYnDstSRF7MRYooS+B yLa4dORhePdLBZWx5h9V =u7Qn -----END PGP SIGNATURE----- --GPJrCs/72TxItFYR-- From mboxrd@z Thu Jan 1 00:00:00 1970 From: wsa@the-dreams.de (Wolfram Sang) Date: Mon, 6 Oct 2014 11:01:50 +0200 Subject: [PATCH] [RFC] ARM: shmobile: Add early debugging support using SCIF(A) In-Reply-To: References: <1412276563-21473-1-git-send-email-geert+renesas@glider.be> <2257006.dpJJ6zLgnP@avalon> <20141006060347.GB1266@katana> Message-ID: <20141006090149.GC1266@katana> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org > I agree with your statement about using the same wires. > However, having the ability to pinmux both SCIF0 and SCIFA0 to the same > wires is not a board property, but an SoC property, right? Both. The SoC needs to support muxing them to the same wires, yes. But the board must also support it. E.g. SCIFA0 could already be used using some other wires, then it is not possible anymore. > Nevertheless, for DEBUG_LL, this is early debug output, so it should use the > exact same settings as the bootloader, which has configured SCIF0, and > (b) has setup pinmux for SCIF0. True. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: