Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi RobertCNelson Thank you for your confirmation. I checked my bbb, My eMMC was 8-bit Mode clearly. sudo cat /sys/kernel/debug/mmc0/ios clock: 5000 Hz vdd:21 (3.3 ~ 3.4 V) bus mode: 2 (push-pull) chip select:0 (don't care) power mode: 2 (on)

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi Dennis Bieber Thank you for the detailed explanation of the SD card standard (class) and features. >The SanDisk Class 4 was easily 8 times faster than the Kingston Class >10 for regular write, rewrite, and random write, and was also faster (if >not as much) for read/reread/random read. We w

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

On Tue, Feb 23, 2021 at 5:59 PM ha ppay wrote: > > Hi RobertCNelson, > > I recently knew that the SD card was just one type of MMC, but I just made a > mistake. Thank you for your advice. > yes, I knew that the am335x MMCHS supports up to 4-bit mode on SD cards. PS you can cat the debugfs to fin

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

On Tue, Feb 23, 2021 at 5:40 PM ha ppay wrote: > > Hi, > I forgot attaching kernel log. > I don't know if I can add it by replying to the comment, but I will challenge > it. > I thought that the SDHC/MMC are type of media, and "high speed" indicates > 4-bit mode. > [1.086202] mmc0: new high

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi RobertCNelson, I recently knew that the SD card was just one type of MMC, but I just made a mistake. Thank you for your advice. yes, I knew that the am335x MMCHS supports up to 4-bit mode on SD cards. >PS, the factory default eMMC on these boards isn't known for speed, >the version used is m

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi, I forgot attaching kernel log. I don't know if I can add it by replying to the comment, but I will challenge it. I thought that the SDHC/MMC are type of media, and "high speed" indicates 4-bit mode. [1.086202] mmc0: new high speed SDHC card at address 0001 [1.091531] mmcblk0: mmc0:0

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

On Mon, Feb 22, 2021 at 8:34 PM ha ppay wrote: > > Hi RobertCNelson, > > Thank you for checking the relevant part. > the description of the Device tree is as follows. Is this overwriting the > setting? In fact, when I set this part to > bus-width = <0x08> > , the Boot time did not change much. >

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi RobertCNelson, Thank you for checking the relevant part. the description of the Device tree is as follows. Is this overwriting the setting? In fact, when I set this part to bus-width = <0x08> , the Boot time did not change much. Could you tell me if there is a way to check the current transfe

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi Jeff, Thank you for your reply. >Hi when you say you're collecting information for faster boot times, can you tell us more about what OS and FS you're running? Functions I require are emmc, i2c, uart, gpio, wlan, adc. ===results of Version.sh

Re: [beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

On Thu, Feb 18, 2021 at 1:10 AM ha ppay wrote: > > > Hi Everyone. > I'm collecting information to get even faster boot times, > I have 2 questions. > It is written that it is possible to boot from MMC (8bit mode) (18.1.1 MMCHS > Features) using MMC mode with TRM of am335x. > - Clock support > -

[beagleboard] the way to set MMC mode(8-bit transfer) and 384Mbps at BBBW

Hi Everyone. I'm collecting information to get even faster boot times, I have 2 questions. It is written that it is possible to boot from MMC (8bit mode) (18.1.1 MMCHS Features) using MMC mode with TRM of am335x. - Clock support -96-MHz functional clock source input -up to 384Mbit/sec (48MByt