From: Arnd Bergmann <arnd@arndb.de>

The rzv2g-cpg.c driver unconditionally links into the r9a09g057
one, but that may be disabled:

aarch64-linux-ld: drivers/clk/renesas/rzv2h-cpg.o:(.rodata+0x440): undefined reference to `r9a09g057_cpg_info'

Use the same approach here as with the rzg2l variant, using an #ifdef
around tha data.

I think both drivers would be better off doing the abstraction the other
way round, with the platform_driver structure defined in the most specific
file and the common bits as a library that exports common functions.
Changing it that way would require a larger rework of course.

Fixes: 42b54d52ecb7 ("clk: renesas: Add RZ/V2H(P) CPG driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/clk/renesas/rzv2h-cpg.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/renesas/rzv2h-cpg.c b/drivers/clk/renesas/rzv2h-cpg.c
index bc0c3bbdb997..34221046dc46 100644
--- a/drivers/clk/renesas/rzv2h-cpg.c
+++ b/drivers/clk/renesas/rzv2h-cpg.c
@@ -664,10 +664,12 @@ static int __init rzv2h_cpg_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id rzv2h_cpg_match[] = {
+#ifdef CONFIG_CLK_R9A09G057
 	{
 		.compatible = "renesas,r9a09g057-cpg",
 		.data = &r9a09g057_cpg_info,
 	},
+#endif
 	{ /* sentinel */ }
 };
 
-- 
2.39.2

Quoting Arnd Bergmann (2024-08-07 00:56:58)
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The rzv2g-cpg.c driver unconditionally links into the r9a09g057
> one, but that may be disabled:
> 
> aarch64-linux-ld: drivers/clk/renesas/rzv2h-cpg.o:(.rodata+0x440): undefined reference to `r9a09g057_cpg_info'
> 
> Use the same approach here as with the rzg2l variant, using an #ifdef
> around tha data.
> 
> I think both drivers would be better off doing the abstraction the other
> way round, with the platform_driver structure defined in the most specific
> file and the common bits as a library that exports common functions.
> Changing it that way would require a larger rework of course.
> 
> Fixes: 42b54d52ecb7 ("clk: renesas: Add RZ/V2H(P) CPG driver")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---

This is https://lore.kernel.org/r/20240805095842.277792-1-prabhakar.mahadev-lad.rj@bp.renesas.com