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| author | Praveen Teja Kundanala <praveen.teja.kundanala@amd.com> | 2024-02-24 11:45:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-07 20:21:53 +0000 |
| commit | e34b943068d30f20db31f28100affdaaedc7efab (patch) | |
| tree | 193c79765dd2a9e9a8e84bb3db2edf500f50d1f7 /drivers/firmware | |
| parent | d28c853b32b868f25545ce0c08b4b6a17f5d8767 (diff) | |
| download | lwn-e34b943068d30f20db31f28100affdaaedc7efab.tar.gz lwn-e34b943068d30f20db31f28100affdaaedc7efab.zip | |
firmware: xilinx: Add ZynqMP efuse access API
Add zynqmp_pm_efuse_access API in the ZynqMP
firmware for read/write access of efuse memory.
Signed-off-by: Praveen Teja Kundanala <praveen.teja.kundanala@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20240224114516.86365-6-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/xilinx/zynqmp.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 79789f0563f6..9bc45357e1a8 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -3,6 +3,7 @@ * Xilinx Zynq MPSoC Firmware layer * * Copyright (C) 2014-2022 Xilinx, Inc. + * Copyright (C) 2022 - 2023, Advanced Micro Devices, Inc. * * Michal Simek <michal.simek@amd.com> * Davorin Mista <davorin.mista@aggios.com> @@ -1385,6 +1386,30 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out) EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine); /** + * zynqmp_pm_efuse_access - Provides access to efuse memory. + * @address: Address of the efuse params structure + * @out: Returned output value + * + * Return: Returns status, either success or error code. + */ +int zynqmp_pm_efuse_access(const u64 address, u32 *out) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!out) + return -EINVAL; + + ret = zynqmp_pm_invoke_fn(PM_EFUSE_ACCESS, ret_payload, 2, + upper_32_bits(address), + lower_32_bits(address)); + *out = ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_efuse_access); + +/** * zynqmp_pm_sha_hash - Access the SHA engine to calculate the hash * @address: Address of the data/ Address of output buffer where * hash should be stored. |