Commit Graph

6 Commits

Author SHA1 Message Date
Samuel Holland
333133edaa lib: utils/i2c: Use fdt_driver for initialization
The i2c driver subsystem does not need any extra data, so it can use
`struct fdt_driver` directly. It always initializes the driver for a
specific DT node.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-11-28 17:38:05 +05:30
Samuel Holland
df1c100001 treewide: Make carray arrays const and NULL-terminated
This allows the compiler to generate significantly better code, because
it does not have to maintain either the loop counter or loop limit. Plus
there are half as many symbols to relocate. This also simplifies passing
carray arrays to helper functions.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-11-28 17:09:17 +05:30
Samuel Holland
039e810437 lib: utils/i2c: Constify FDT pointers in parsing functions
Indicate that none of these functions modify the devicetree by
constifying the parameter type.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-08-24 13:02:28 +05:30
Anup Patel
998ed43fde lib: utils/i2c: Generate FDT i2c adapter driver list at compile-time
Instead of having FDT i2c adapter driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2022-05-13 09:26:45 +05:30
Nikita Shubin
13a1158d24 lib: utils/i2c: Add minimal SiFive I2C driver
Minimum SiFive I2C driver to read/send bytes over I2C bus.

This allows querying information and perform operation of onboard PMIC,
as well as power-off and reset.

Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
2021-11-12 10:29:08 +05:30
Nikita Shubin
6ca6bcafb7 lib: utils/i2c: Add simple FDT based I2C framework
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 <heinrich.schuchardt@canonical.com>
Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
2021-11-12 10:19:45 +05:30