Re: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors

[Geert Uytterhoeven]

Hi Randy,

On Tue, Jul 18, 2023 at 8:44 AM Randy Dunlap <rd.dunlab@xxxxxxxxx> wrote:
> From: Randy Dunlap <rd.dunlab@xxxxxxxxx>
>
> When (MFD) RZ_MTU3=m and PWM_RZ_MTU3=y, there are numerous build errors:
>
> ld: vmlinux.o: in function `rz_mtu3_pwm_config':
> drivers/pwm/pwm-rz-mtu3.c:374: undefined reference to `rz_mtu3_disable'
> ld: drivers/pwm/pwm-rz-mtu3.c:377: undefined reference to `rz_mtu3_8bit_ch_write'
> ld: vmlinux.o: in function `rz_mtu3_pwm_write_tgr_registers':
> drivers/pwm/pwm-rz-mtu3.c:110: undefined reference to `rz_mtu3_16bit_ch_write'
> ld: vmlinux.o: in function `rz_mtu3_pwm_config':
> drivers/pwm/pwm-rz-mtu3.c:382: undefined reference to `rz_mtu3_8bit_ch_write'
> ld: vmlinux.o: in function `rz_mtu3_pwm_write_tgr_registers':
> drivers/pwm/pwm-rz-mtu3.c:110: undefined reference to `rz_mtu3_16bit_ch_write'
> ld: drivers/pwm/pwm-rz-mtu3.c:111: undefined reference to `rz_mtu3_16bit_ch_write'
> ld: vmlinux.o: in function `rz_mtu3_pwm_config':
> drivers/pwm/pwm-rz-mtu3.c:397: undefined reference to `rz_mtu3_enable'
> ld: vmlinux.o: in function `rz_mtu3_pwm_disable':
> drivers/pwm/pwm-rz-mtu3.c:259: undefined reference to `rz_mtu3_8bit_ch_write'
> ld: drivers/pwm/pwm-rz-mtu3.c:264: undefined reference to `rz_mtu3_disable'
> ld: vmlinux.o: in function `rz_mtu3_pwm_enable':
> drivers/pwm/pwm-rz-mtu3.c:230: undefined reference to `rz_mtu3_8bit_ch_write'
> ld: drivers/pwm/pwm-rz-mtu3.c:234: undefined reference to `rz_mtu3_8bit_ch_write'
> ld: drivers/pwm/pwm-rz-mtu3.c:238: undefined reference to `rz_mtu3_enable'
> ld: vmlinux.o: in function `rz_mtu3_pwm_is_ch_enabled':
> drivers/pwm/pwm-rz-mtu3.c:155: undefined reference to `rz_mtu3_is_enabled'
> ld: drivers/pwm/pwm-rz-mtu3.c:162: undefined reference to `rz_mtu3_8bit_ch_read'
> ld: vmlinux.o: in function `rz_mtu3_pwm_read_tgr_registers':
> drivers/pwm/pwm-rz-mtu3.c:102: undefined reference to `rz_mtu3_16bit_ch_read'
> ld: drivers/pwm/pwm-rz-mtu3.c:102: undefined reference to `rz_mtu3_16bit_ch_read'
> ld: drivers/pwm/pwm-rz-mtu3.c:103: undefined reference to `rz_mtu3_16bit_ch_read'
> ld: vmlinux.o: in function `rz_mtu3_pwm_get_state':
> drivers/pwm/pwm-rz-mtu3.c:296: undefined reference to `rz_mtu3_8bit_ch_read'
>
> Modify the dependencies of PWM_RZ_MTU3 so that COMPILE_TEST is
> still allowed but PWM_RZ_MTU3 depends on RZ_MTU3 if it is being built
> but also allow the latter not to be built.
>
> Fixes: 254d3a727421 ("pwm: Add Renesas RZ/G2L MTU3a PWM driver")
> Signed-off-by: Randy Dunlap <rd.dunlab@xxxxxxxxx

Thanks for your patch!

> --- a/drivers/pwm/Kconfig
> +++ b/drivers/pwm/Kconfig
> @@ -505,7 +505,8 @@ config PWM_ROCKCHIP
>
>  config PWM_RZ_MTU3
>         tristate "Renesas RZ/G2L MTU3a PWM Timer support"
> -       depends on RZ_MTU3 || COMPILE_TEST
> +       depends on COMPILE_TEST

This makes the driver always depend on COMPILE_TEST,
which is definitely not what we want.

> +       depends on RZ_MTU3 || RZ_MTU3=n
>         depends on HAS_IOMEM
>         help
>           This driver exposes the MTU3a PWM Timer controller found in Renesas

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds