linux-toradex.git/drivers/nvmem/rcar-efuse.c, branch v6.13-rc2 Linux kernel for Apalis and Colibri modules nvmem: Add R-Car E-FUSE driver 2024-11-05T04:33:46+00:00 Geert Uytterhoeven geert+renesas@glider.be 2024-10-30T14:03:10+00:00 1530b923a514b158b91453bf5adc9291e77638f5 R-Car Gen4 SoCs contain fuses indicating hardware support or hardware (e.g. tuning) parameters. Add a driver to access the state of the fuses. This supports two types of hardware fuse providers: 1. E-FUSE non-volatile memory accessible through the Pin Function Controller on R-Car V3U and S4-8, 2. E-FUSE non-volatile memory accessible through OTP_MEM on R-Car V4H and V4M. The state of the cells can be read using the NVMEM framework, either from kernel space (e.g. by the Renesas UFSHCD driver), or from userspace. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20241030140315.40562-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
R-Car Gen4 SoCs contain fuses indicating hardware support or hardware
(e.g. tuning) parameters.  Add a driver to access the state of the
fuses.  This supports two types of hardware fuse providers:
  1. E-FUSE non-volatile memory accessible through the Pin Function
     Controller on R-Car V3U and S4-8,
  2. E-FUSE non-volatile memory accessible through OTP_MEM on R-Car V4H
     and V4M.

The state of the cells can be read using the NVMEM framework, either
from kernel space (e.g. by the Renesas UFSHCD driver), or from
userspace.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20241030140315.40562-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>