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Message-ID: <OS0PR01MB5922DB58198129A9D29E91D08638A@OS0PR01MB5922.jpnprd01.prod.outlook.com>
Date:   Tue, 18 Jul 2023 06:37:33 +0000
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Randy Dunlap <rd.dunlab@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pwm@...r.kernel.org" <linux-pwm@...r.kernel.org>
CC:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Thierry Reding <thierry.reding@...il.com>
Subject: RE: [PATCH] pwm: fi pwm-rz-mtu3.c build errors

Hi Randy Dunlap,

Thanks for the feedback.

> Subject: [PATCH] pwm: fi pwm-rz-mtu3.c build errors
> 
> From: Randy Dunlap <rdunlap@...radead.org>
> 
> When (MFD) RZ_MTU3=m and PWM_RZ_MTU3=y, there are numerous build errors:

Recently added module support for RZ_MTU3[1]. ie, after adding PWM support. 

[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20230718&id=b8b28b718ddd56e546d44107cf7c57f3a07d7efd

> 
> 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 <rdunlap@...radead.org>
> Cc: Biju Das <biju.das.jz@...renesas.com>
> Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Cc: Thierry Reding <thierry.reding@...il.com>
> Cc: linux-pwm@...r.kernel.org

Reviewed-by: Biju Das <biju.das.jz@...renesas.com>

Cheers,
Biju

> ---
>  drivers/pwm/Kconfig |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff -- a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
> --- 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
> +	depends on RZ_MTU3 || RZ_MTU3=n
>  	depends on HAS_IOMEM
>  	help
>  	  This driver exposes the MTU3a PWM Timer controller found in
> Renesas

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