From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Fri, 3 May 2013 22:47:21 +0200 Subject: [U-Boot] [PATCH 2/6] README: mx28_common: Do not hardcode the SSP port In-Reply-To: References: <1367604482-20955-1-git-send-email-festevam@gmail.com> <201305032152.14780.marex@denx.de> Message-ID: <201305032247.21397.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Fabio Estevam, > On Fri, May 3, 2013 at 4:52 PM, Marek Vasut wrote: > >> To boot a MX28 based board from SD, set the boot mode DIP switches > >> > >> according -to i.MX28 manual chapter 12.2.1 (Table 12-2), PORT=SSP0, > >> SD/MMC master on -SSP0, 3.3V. > >> - > >> +to i.MX28 manual chapter 12.2.1 (Table 12-2). > > > > Make sure to leave the 3V3 thing there. PORT=SSPn would be a better > > solution here too. > > Sorry, but I disagree. > > Please check table 12-2 from mx28 reference manual and you will see > that SD boot is also possible in 1.8V, so in the common README file it > makes no sense to hardcode the boot voltage. Besides that, mx23 does > not refer to 3.3V in its boot mode table. When was the last time you saw 1V8 SD card ? ;-) > PORT=SSPn is also noisy. Let's get rid of all this. People will have > to look the reference manual anyway. > > Also, in v2 I will change "set the boot mode DIP switches" to "set the > boot mode pins", as not all boards use DIP switches. Best regards, Marek Vasut