[PATCH] nvmem: airoha: add ARM64 dependency

[PATCH] nvmem: airoha: add ARM64 dependency

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The driver already depends on HAVE_ARM_SMCCC and ARCH_AIROHA, but both
are available for 32-bit and 64-bit targets. However, the smccc invocation
fails on thumb2 builds with clang:

drivers/nvmem/airoha-smc-efuses.c:38:2: error: write to reserved register 'R7'
   38 |         arm_smccc_1_1_invoke(AIROHA_SMC_EFUSE_FID,
      |         ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm/include/asm/opcodes.h:215:2: note: expanded from macro '__inst_arm_thumb32'
  215 |         __inst_thumb32(thumb_opcode)
      |         ^

Since the driver is only used on the 64-bit an7581 soc, avoid this
problem with a stricter dependency.

Fixes: 25e001fcc1e6 ("nvmem: airoha: Add support for SMC eFUSE")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/nvmem/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
index e10f7ff725ff..f33ee18930ae 100644
--- a/drivers/nvmem/Kconfig
+++ b/drivers/nvmem/Kconfig
@@ -30,6 +30,7 @@ source "drivers/nvmem/layouts/Kconfig"
 
 config NVMEM_AIROHA_SMC_EFUSES
 	tristate "Airoha SMC eFuse support"
+	depends on ARM64
 	depends on ARCH_AIROHA || COMPILE_TEST
 	depends on HAVE_ARM_SMCCC
 	default ARCH_AIROHA
-- 
2.39.5

Re: [PATCH] nvmem: airoha: add ARM64 dependency

[Christian Marangi]

On Thu, Jun 11, 2026 at 02:58:00PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The driver already depends on HAVE_ARM_SMCCC and ARCH_AIROHA, but both
> are available for 32-bit and 64-bit targets. However, the smccc invocation
> fails on thumb2 builds with clang:
> 
> drivers/nvmem/airoha-smc-efuses.c:38:2: error: write to reserved register 'R7'
>    38 |         arm_smccc_1_1_invoke(AIROHA_SMC_EFUSE_FID,
>       |         ^
> note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
> arch/arm/include/asm/opcodes.h:215:2: note: expanded from macro '__inst_arm_thumb32'
>   215 |         __inst_thumb32(thumb_opcode)
>       |         ^
> 
> Since the driver is only used on the 64-bit an7581 soc, avoid this
> problem with a stricter dependency.
> 
> Fixes: 25e001fcc1e6 ("nvmem: airoha: Add support for SMC eFUSE")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Christian Marangi <ansuelsmth@gmail.com>

-- 
	Ansuel

Re: [PATCH] nvmem: airoha: add ARM64 dependency

[Srinivas Kandagatla]

On Thu, 11 Jun 2026 14:58:00 +0200, Arnd Bergmann wrote:
> The driver already depends on HAVE_ARM_SMCCC and ARCH_AIROHA, but both
> are available for 32-bit and 64-bit targets. However, the smccc invocation
> fails on thumb2 builds with clang:
> 
> drivers/nvmem/airoha-smc-efuses.c:38:2: error: write to reserved register 'R7'
>    38 |         arm_smccc_1_1_invoke(AIROHA_SMC_EFUSE_FID,
>       |         ^
> note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
> arch/arm/include/asm/opcodes.h:215:2: note: expanded from macro '__inst_arm_thumb32'
>   215 |         __inst_thumb32(thumb_opcode)
>       |         ^
> 
> [...]

Applied, thanks!

[1/1] nvmem: airoha: add ARM64 dependency
      commit: 29d8d70e55efed7c2edf3a458d2e60e9ca41bde6

Best regards,
-- 
Srinivas Kandagatla <srini@kernel.org>