25 Oct
2020
25 Oct
'20
2:12 p.m.
On Fri, Oct 23, 2020 at 4:18 PM Jorge Ramirez-Ortiz jorge@foundries.io wrote:
In order to be able to run the I2C bus at 400Khz, the chip errata[1] recommends that the peripheral clock runs out of the 24MHz oscillator.
Systems running I2C from OP-TEE before Linux executes - for example to access a Secure Element [2] providing the cryptographic support - expect this clock to be configured by the bootloader [3].
[1] IMX6SLCE Rev. 5, 02/2019, ERR007805. [2] OP-TEE: support for NXP SE05X Plug and Trust (patch on the list). [3] OP-TEE: check the imx_i2c.c driver (imx6 patch on the list).
Signed-off-by: Jorge Ramirez-Ortiz jorge@foundries.io
Reviewed-by: Fabio Estevam festevam@gmail.com