opensbi.git/include/sbi_utils, branch v1.0

lib: utils: Add LiteX UART support

2021-11-18T07:52:02Z

Add support for the UART provided by the LiteX SoC framework (https://github.com/enjoy-digital/litex), based on its FDT info (described in the Linux tree at Documentation/devicetree/bindings/serial/litex,liteuart.yaml). Signed-off-by: Gabriel Somlo Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: utils/i2c: Add simple FDT based I2C framework

2021-11-12T04:49:45Z

FDT based I2C framework on the top of I2C library. The drivers are probed on demand by fdt_i2c_adapter_get function. Tested-by: Heinrich Schuchardt Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin

lib: utils/i2c: Add generic I2C configuration library

2021-11-12T04:47:50Z

Helper library to keep track of registered I2C adapters, identified by dts offset, basic send/read functions and adapter configuration (enable, set dividers, etc...). Tested-by: Heinrich Schuchardt Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin

lib: utils/reset: separate driver init func

2021-11-12T04:46:23Z

Move driver init code to separate function, so it can be reused elsewhere. Tested-by: Heinrich Schuchardt Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin

lib: sbi: error handling in fdt_reset_init()

2021-11-08T05:20:48Z

The initialization of a reset driver may fail for various reasons, like a PMIC based reset driver not finding the required I2C driver. The return code of the init routine may take other error values than -ENODEV. If the initialization of a reset driver fails, this should not lead to the board hanging. It is enough that the reset driver does not call sbi_system_reset_add_device() to avoid invoking the driver for a device that could not be initialized. Change the return type of fdt_reset_init() to void. Print a message if an error occurs. Signed-off-by: Heinrich Schuchardt Reviewed-by: Dong Du Reviewed-by: Anup Patel

lib: utils/gpio: use list for drivers

2021-11-03T10:27:56Z

Convert static array to sbi_list. This removes size limitation, makes add/remove more efficient and saves space. Signed-off-by: Nikita Shubin Reviewed-by: Anup Patel

include: sbi_utils: Introduce an helper to get fdt base address

2021-11-02T05:53:16Z

This simply adds an helper to get fdt address which is more explicit than sbi_scratch_thishart_arg1_ptr. Signed-off-by: Alexandre Ghiti Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: sbi: Add timer frequency to struct sbi_timer_device

2021-09-26T14:22:10Z

Generic mdelay() and udelay() functions can be provided by the sbi_timer framework if timer frequency is available in the timer instance provided by the platform support or timer driver. This patch adds timer frequency (timer_freq) member in the struct sbi_timer_device for above purpose. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Xiang W

lib: utils/fdt: Add fdt_parse_timebase_frequency() function

2021-09-26T14:22:07Z

We add fdt_parse_timebase_frequency() function which can be used by ACLINT mtimer driver and platform code to get timebase frequency. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Xiang W

lib: utils/timer: Simplify MTIMER synchronization

2021-08-14T03:37:42Z

We simplify MTIMER synchronization as follows: 1) Detect MTIMER devices with unique (or non-shared) MTIME register at boot-time 2) Select first MTIMER device with no associated HART as our reference MTIMER device 3) Only synchronize MTIMER devices with unique (or non-shared) MTIME register using reference MTIMER device 4) Directly update the MTIME register at time of synchronization because MTIME is a read/write register. Signed-off-by: Anup Patel Reviewed-by: Atish Patra