diff options
| author | Neha Malcom Francis <n-francis@ti.com> | 2023-09-08 15:06:16 +0530 |
|---|---|---|
| committer | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2023-09-09 06:12:47 +0200 |
| commit | 7314ba2bf8452df68d07f251aa59440de58067b0 (patch) | |
| tree | ae31c280504225e27c57fa0fae8e77d011613ea5 /doc/SPI/README.ti_qspi_flash | |
| parent | 129048a3b714af42dfe28cc740dafbc6f5e935f3 (diff) | |
doc: board: ti: Move documentation from README to .rst
Make the conversion for all existing TI documentation from README to
.rst
Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
Diffstat (limited to 'doc/SPI/README.ti_qspi_flash')
| -rw-r--r-- | doc/SPI/README.ti_qspi_flash | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/doc/SPI/README.ti_qspi_flash b/doc/SPI/README.ti_qspi_flash deleted file mode 100644 index 5cc1fd03b6..0000000000 --- a/doc/SPI/README.ti_qspi_flash +++ /dev/null @@ -1,47 +0,0 @@ -QSPI U-Boot support ------------------- - -Host processor is connected to serial flash device via qpsi -interface. QSPI is a kind of spi module that allows single, -dual and quad read access to external spi devices. The module -has a memory mapped interface which provide direct interface -for accessing data form external spi devices. - -The one QSPI in the device is primarily intended for fast booting -from Quad SPI flash devices. - -Usecase -------- - -MLO/u-boot.img will be flashed from SD/MMC to the flash device -using serial flash erase and write commands. Then, switch settings -will be changed to qspi boot. Then, the ROM code will read MLO -from the predefined location in the flash, where it was flashed and -execute it after storing it in SDRAM. Then, the MLO will read -u-boot.img from flash and execute it from SDRAM. - -SPI mode -------- -SPI mode uses mtd spi framework for transfer and reception of data. -Can be used in: -1. Normal mode: use single pin for transfers -2. Dual Mode: use two pins for transfers. -3. Quad mode: use four pin for transfer - -Memory mapped read mode ------------------------ -In this, SPI controller is configured using configuration port and then -controller is switched to memory mapped port for data read. - -Driver ------- -drivers/qspi/ti_qspi.c - - Newly created file which is responsible for configuring the - qspi controller and also for providing the low level api which - is responsible for transferring the datas from host controller - to flash device and vice versa. - -Testing -------- -A seperated file named README.dra_qspi_test has been created which gives all the -details about the commands required to test qspi at U-Boot level. |