Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-18 Thread Stefano Babic
Hi Rick, On 18/02/2018 00:24, Rick Bronson wrote: > Hi Fabio, > > First a disclaimer. I no longer work for the client that had me > make this change. I also no longer have any iMX53 hardware to do any > kind of tests. But I'm happy to help out with this email. > Thanks for your support !

Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-17 Thread Fabio Estevam
Hi Rick, On Sat, Feb 17, 2018 at 9:24 PM, Rick Bronson wrote: >> It would be nice to explain a bit how you achieve the higher baud rates. > > Background: PLL2 runs at 400 MHz, PLL3 runs at 216 MHz. One of > these PLL's are fed to a UART divider, the output of which sets the > maximum UART bau

Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-17 Thread Rick Bronson
Hi Fabio, First a disclaimer. I no longer work for the client that had me make this change. I also no longer have any iMX53 hardware to do any kind of tests. But I'm happy to help out with this email. > Hi Rick and Sebastian, > > On Thu, Feb 15, 2018 at 2:15 PM, Sebastian Reichel > wrote: >

Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-17 Thread rick
" Sent: Saturday, February 17, 2018 9:42:47 AM Subject: Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate On Thu, Feb 15, 2018 at 2:15 PM, Sebastian Reichel wrote: > From: Rick Bronson > > Allow higher UART baud rates for communications to ACHC

Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-17 Thread Fabio Estevam
On Thu, Feb 15, 2018 at 2:15 PM, Sebastian Reichel wrote: > From: Rick Bronson > > Allow higher UART baud rates for communications to ACHC at 13.5 MBaud > Done in u-boot since it changes a divider common to all UARTs, including > the console. If it were done in Linux we would get garbled characte

Re: [U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-17 Thread Fabio Estevam
Hi Rick and Sebastian, On Thu, Feb 15, 2018 at 2:15 PM, Sebastian Reichel wrote: > From: Rick Bronson > > Allow higher UART baud rates for communications to ACHC at 13.5 MBaud What does ACHC mean? > Done in u-boot since it changes a divider common to all UARTs, including > the console. If it w

[U-Boot] [PATCHv1] mx53ppd: Change UART clock divider for high baudrate

2018-02-15 Thread Sebastian Reichel
From: Rick Bronson Allow higher UART baud rates for communications to ACHC at 13.5 MBaud Done in u-boot since it changes a divider common to all UARTs, including the console. If it were done in Linux we would get garbled characters during the handoff from u-boot to the kernel. Signed-off-by: Seb