From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Date: Wed, 05 Mar 2014 13:54:32 +0000 Subject: Re: [PATCH 3/4] clk: shmobile: add CPG driver for rz-platforms Message-Id: <20140305135431.GA7985@katana> MIME-Version: 1 Content-Type: multipart/mixed; boundary="vtzGhvizbBRQ85DL" List-Id: References: <1393621768-12568-1-git-send-email-wsa@the-dreams.de> <1722697.3h0GnbWuD3@avalon> <20140303162731.GA3732@katana> <2207635.bd10VfTU6U@avalon> In-Reply-To: <2207635.bd10VfTU6U@avalon> To: linux-arm-kernel@lists.infradead.org --vtzGhvizbBRQ85DL Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > > > While the parent is indeed selected at boot time only, and only one p= arent > > > is thus needed, parent selection could be performed by a DIP switch > > > connected to MD_CLK on the board for instance. In that case both pare= nts > > > should be available in DT, as selection will be done by the kernel at > > > boot time, not at DT compile time. > >=20 > > OK, I understand the case. I still wonder about specifying two parents, > > though. If a board uses USB_X1, it then has to spefify a dummy EXTAL > > clock (or an empty one), just because USB_X1 is enumerated as second > > entry? >=20 > That's a good question. Mike, would it be possible to support "holes" in = the=20 > DT clocks lists, like the GPIO DT bindings do ? I talked to Magnus and we decided to start with hardcoded EXTAL for now, and leave USB_X1 support for in incremental patch when this is actually needed. Note that the devkit will most likely be the only board ever with a selectable root clock. --vtzGhvizbBRQ85DL Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iQIcBAEBAgAGBQJTFyyXAAoJEBQN5MwUoCm2cKEQAJmz6ksa7/pHqcyxxhphb7Ir Ab1Jwadm7KkTEQQxJRbINDaqcQjMkh/ZMZIL8O5wbtbeLpPZdEhQjifw5y40G91B 3rjnAmzLglZ/f6Qid0b7AawPNYVhoTo64EbNPryrfBCu2MQUXbqWSsjUkIO1CYaS UVAf9fZaFhQN2amsoPRfstQxm6gH8tak876Pdk6AjvfI2NcbCT9f+3e/FduC1Xnm mPa0sUK6w4yPyQhsAnYP7wjIT7IwEQtAX8KvREDGohgYrkZwZ74OjC0YeGZmMFY5 LL9YKb1g3XHrS50HloeH94PRzUFdNoTgrCYIMi827vkRhzxNYHVKQ+VEdk78KSyw BfBowC/0Pg6jRnyXIjcdkspclVHs4TYQHduD2FpSYJzHFffwiDOESPZrk1j4fQPf L4yuUUQJz3K5Ulamb8DhIgiEdRtJzom9PXPVFXIeBto2UPXUo+b17WvPB+aOS5aq VSB3zaj7E4xFG+oHfibIgCI4dDRAprGOUduCG5KgC21ivVWL2zQvFHgAPYmxInR7 BIrOeDy5zoGQg2u9Yg92lYrXjEoAmY0u93GZnNntJAOVAIpnRY4LhU36W5BAHM27 U/Ljc0A0IoqKku9ohH1fMBYFcuvMfnqhuFn5P06ufepddNz2efEmI9+1ClAkXTfu /shThgsi/9L2k4GvO4I3 =VtUM -----END PGP SIGNATURE----- --vtzGhvizbBRQ85DL--