drivers/pwm/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
From: Randy Dunlap <rd.dunlab@gmail.com>
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@gmail.com
Cc: Biju Das <biju.das.jz@bp.renesas.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: linux-pwm@vger.kernel.org
---
v2: fix typo in Subject;
correct my email address while infradead.org is down;
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
On Mon, Jul 17, 2023 at 11:41:06PM -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rd.dunlab@gmail.com>
>
> 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@gmail.com
> Cc: Biju Das <biju.das.jz@bp.renesas.com>
> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: linux-pwm@vger.kernel.org
I missed this v2 while I still looked at (implicit) v1. The things I
said there still apply for v2. I don't repeat my writings, but here is a
link to the archive with what I wrote:
https://lore.kernel.org/linux-pwm/20230718090023.wo6m6ffzaifgctkj@pengutronix.de/
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
Hi Randy,
On Tue, Jul 18, 2023 at 8:44 AM Randy Dunlap <rd.dunlab@gmail.com> wrote:
> From: Randy Dunlap <rd.dunlab@gmail.com>
>
> 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@gmail.com
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@linux-m68k.org
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
On Tue, Jul 18, 2023 at 02:05:42PM +0200, Geert Uytterhoeven wrote:
> Hi Randy,
>
> On Tue, Jul 18, 2023 at 8:44 AM Randy Dunlap <rd.dunlab@gmail.com> wrote:
> > From: Randy Dunlap <rd.dunlab@gmail.com>
> >
> > 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@gmail.com
>
> 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.
Honestly, do we really need all of this complexity? I have specific
configurations to test all of the PWM drivers to make sure they build.
There's probably edge cases that don't get tested, but sooner or later I
expect some build bot will encounter those and then we can rectify
things. But in many cases that I've seen COMPILE_TEST just happens to do
more harm than good.
Thierry
On Tue, Jul 18, 2023 at 03:24:58PM +0200, Thierry Reding wrote:
> On Tue, Jul 18, 2023 at 02:05:42PM +0200, Geert Uytterhoeven wrote:
> > Hi Randy,
> >
> > On Tue, Jul 18, 2023 at 8:44 AM Randy Dunlap <rd.dunlab@gmail.com> wrote:
> > > From: Randy Dunlap <rd.dunlab@gmail.com>
> > >
> > > 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@gmail.com
> >
> > 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.
>
> Honestly, do we really need all of this complexity? I have specific
> configurations to test all of the PWM drivers to make sure they build.
> There's probably edge cases that don't get tested, but sooner or later I
> expect some build bot will encounter those and then we can rectify
> things. But in many cases that I've seen COMPILE_TEST just happens to do
> more harm than good.
Without COMPILE_TEST you'd need to build at least for the following
archs to build all pwm drivers:
armv4+5
armv7
armv7m
arm64
mips
riscv
shmobile
x86
I personally like COMPILE_TEST as it reduces the number of needed test
builds to 1 (I think).
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
On Tue, Jul 18, 2023 at 06:57:16PM +0200, Uwe Kleine-König wrote:
> On Tue, Jul 18, 2023 at 03:24:58PM +0200, Thierry Reding wrote:
> > On Tue, Jul 18, 2023 at 02:05:42PM +0200, Geert Uytterhoeven wrote:
> > > Hi Randy,
> > >
> > > On Tue, Jul 18, 2023 at 8:44 AM Randy Dunlap <rd.dunlab@gmail.com> wrote:
> > > > From: Randy Dunlap <rd.dunlab@gmail.com>
> > > >
> > > > 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@gmail.com
> > >
> > > 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.
> >
> > Honestly, do we really need all of this complexity? I have specific
> > configurations to test all of the PWM drivers to make sure they build.
> > There's probably edge cases that don't get tested, but sooner or later I
> > expect some build bot will encounter those and then we can rectify
> > things. But in many cases that I've seen COMPILE_TEST just happens to do
> > more harm than good.
>
> Without COMPILE_TEST you'd need to build at least for the following
> archs to build all pwm drivers:
>
> armv4+5
> armv7
> armv7m
> arm64
> mips
> riscv
> shmobile
This one is actually ARCH_RENESAS and is armv7.
> x86
But yeah, those are the platforms that I build for. It's not terribly
complicated to do since all of the above have publicly available cross-
compilers that are easy to install. Also, most of the time I do
incremental builds, so these are quite quick.
> I personally like COMPILE_TEST as it reduces the number of needed test
> builds to 1 (I think).
Anyway, I wasn't arguing that we should get rid of COMPILE_TEST
altogether, just that for cases like this it doesn't seem worth the
extra complexity. RZ_MTU3 is an MFD and already || COMPILE_TEST, so
we can easily always enable it.
Thierry
Hello, On Wed, Jul 19, 2023 at 09:40:22AM +0200, Thierry Reding wrote: > On Tue, Jul 18, 2023 at 06:57:16PM +0200, Uwe Kleine-König wrote: > > On Tue, Jul 18, 2023 at 03:24:58PM +0200, Thierry Reding wrote: > > > Honestly, do we really need all of this complexity? I have specific > > > configurations to test all of the PWM drivers to make sure they build. > > > There's probably edge cases that don't get tested, but sooner or later I > > > expect some build bot will encounter those and then we can rectify > > > things. But in many cases that I've seen COMPILE_TEST just happens to do > > > more harm than good. > > > > Without COMPILE_TEST you'd need to build at least for the following > > archs to build all pwm drivers: > > > > armv4+5 > > armv7 > > armv7m > > arm64 > > mips > > riscv > > shmobile > > This one is actually ARCH_RENESAS and is armv7. Oh indeed. ARCH_RENESAS exists for both arm and shmobile. TIL > > x86 > > But yeah, those are the platforms that I build for. It's not terribly > complicated to do since all of the above have publicly available cross- > compilers that are easy to install. Also, most of the time I do > incremental builds, so these are quite quick. > > > I personally like COMPILE_TEST as it reduces the number of needed test > > builds to 1 (I think). > > Anyway, I wasn't arguing that we should get rid of COMPILE_TEST > altogether, just that for cases like this it doesn't seem worth the > extra complexity. RZ_MTU3 is an MFD and already || COMPILE_TEST, so > we can easily always enable it. Ah, I got that wrong then. I can life with this one. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ |
> -----Original Message----- > From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > Sent: Wednesday, July 19, 2023 11:14 AM > To: Thierry Reding <thierry.reding@gmail.com> > Cc: Geert Uytterhoeven <geert@linux-m68k.org>; Randy Dunlap > <rd.dunlab@gmail.com>; linux-kernel@vger.kernel.org; linux- > pwm@vger.kernel.org; Biju Das <biju.das.jz@bp.renesas.com> > Subject: Re: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors > > Hello, > > On Wed, Jul 19, 2023 at 09:40:22AM +0200, Thierry Reding wrote: > > On Tue, Jul 18, 2023 at 06:57:16PM +0200, Uwe Kleine-König wrote: > > > On Tue, Jul 18, 2023 at 03:24:58PM +0200, Thierry Reding wrote: > > > > Honestly, do we really need all of this complexity? I have > > > > specific configurations to test all of the PWM drivers to make > sure they build. > > > > There's probably edge cases that don't get tested, but sooner or > > > > later I expect some build bot will encounter those and then we can > > > > rectify things. But in many cases that I've seen COMPILE_TEST just > > > > happens to do more harm than good. > > > > > > Without COMPILE_TEST you'd need to build at least for the following > > > archs to build all pwm drivers: > > > > > > armv4+5 > > > armv7 > > > armv7m > > > arm64 > > > mips > > > riscv > > > shmobile > > > > This one is actually ARCH_RENESAS and is armv7. > > Oh indeed. ARCH_RENESAS exists for both arm and shmobile. TIL arm64 and risc-v too. This MTU3 driver should work on RISC-V(RZ/Five) as well(need to test at some point). Cheers, Biju > > > > x86 > > > > But yeah, those are the platforms that I build for. It's not terribly > > complicated to do since all of the above have publicly available > > cross- compilers that are easy to install. Also, most of the time I do > > incremental builds, so these are quite quick. > > > > > I personally like COMPILE_TEST as it reduces the number of needed > > > test builds to 1 (I think). > > > > Anyway, I wasn't arguing that we should get rid of COMPILE_TEST > > altogether, just that for cases like this it doesn't seem worth the > > extra complexity. RZ_MTU3 is an MFD and already || COMPILE_TEST, so we > > can easily always enable it. > > Ah, I got that wrong then. I can life with this one. > > Best regards > Uwe > > -- > Pengutronix e.K. | Uwe Kleine-König > | > Industrial Linux Solutions | https://www.pengutronix.de/ > |
Hi Uwe,
On Wed, Jul 19, 2023 at 12:13 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
> On Wed, Jul 19, 2023 at 09:40:22AM +0200, Thierry Reding wrote:
> > On Tue, Jul 18, 2023 at 06:57:16PM +0200, Uwe Kleine-König wrote:
> > > On Tue, Jul 18, 2023 at 03:24:58PM +0200, Thierry Reding wrote:
> > > > Honestly, do we really need all of this complexity? I have specific
> > > > configurations to test all of the PWM drivers to make sure they build.
> > > > There's probably edge cases that don't get tested, but sooner or later I
> > > > expect some build bot will encounter those and then we can rectify
> > > > things. But in many cases that I've seen COMPILE_TEST just happens to do
> > > > more harm than good.
> > >
> > > Without COMPILE_TEST you'd need to build at least for the following
> > > archs to build all pwm drivers:
> > >
> > > armv4+5
> > > armv7
> > > armv7m
> > > arm64
> > > mips
> > > riscv
> > > shmobile
> >
> > This one is actually ARCH_RENESAS and is armv7.
>
> Oh indeed. ARCH_RENESAS exists for both arm and shmobile. TIL
No, SH-Mobile can be either sh, arm, or both ;-)
ARCH_SHMOBILE is sh.
ARCH_RENESAS is arm, arm64, or riscv.
The Renesas/arm defconfig is called shmobile_defconfig for
historical reasons.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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
Hi Randy,
> From: Randy Dunlap <rd.dunlab@gmail.com>
> Subject: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors
>
> From: Randy Dunlap <rd.dunlab@gmail.com>
>
> 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@gmail.com
> Cc: Biju Das <biju.das.jz@bp.renesas.com>
> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: linux-pwm@vger.kernel.org
> ---
> v2: fix typo in Subject;
> correct my email address while infradead.org is down;
>
> 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
Isn't this a tautology?
Cheers,
Fab
> depends on HAS_IOMEM
> help
> This driver exposes the MTU3a PWM Timer controller found in
> Renesas
On 7/18/23 05:13, Fabrizio Castro wrote: > Hi Randy, > >> From: Randy Dunlap <rd.dunlab@gmail.com> >> Subject: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors >> >> From: Randy Dunlap <rd.dunlab@gmail.com> >> >> When (MFD) RZ_MTU3=m and PWM_RZ_MTU3=y, there are numerous build >> errors: >> >> >> 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. >> >> 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 > > Isn't this a tautology? Not at all. It's used in Kconfig quite a bit. This is tristate logic. It says that if RZ_MTU3 is y/m, PWM_RZ_MTU3 is limited by that. But if RZ_MTU3 is n, PWM_RZ_MTU3 can be y or m. Is that clearer? -- ~Randy
Hi Randy, > From: Randy Dunlap <rd.dunlab@gmail.com> > Subject: Re: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors > > On 7/18/23 05:13, Fabrizio Castro wrote: > > Hi Randy, > > > >> From: Randy Dunlap <rd.dunlab@gmail.com> > >> Subject: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors > >> > >> From: Randy Dunlap <rd.dunlab@gmail.com> > >> > >> When (MFD) RZ_MTU3=m and PWM_RZ_MTU3=y, there are numerous build > >> errors: > >> > >> > >> 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. > >> > >> 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 > > > > Isn't this a tautology? > > Not at all. It's used in Kconfig quite a bit. > This is tristate logic. > > It says that if RZ_MTU3 is y/m, PWM_RZ_MTU3 is limited by that. > But if RZ_MTU3 is n, PWM_RZ_MTU3 can be y or m. > > Is that clearer? It is, thanks for the explanation! Cheers, Fab > > -- > ~Randy
Hi Randy,
> -----Original Message-----
> From: Randy Dunlap <rd.dunlab@gmail.com>
> Sent: Tuesday, July 18, 2023 7:41 AM
> To: linux-kernel@vger.kernel.org; linux-pwm@vger.kernel.org
> Cc: Biju Das <biju.das.jz@bp.renesas.com>; Thierry Reding
> <thierry.reding@gmail.com>; Uwe Kleine-König <u.kleine-
> koenig@pengutronix.de>
> Subject: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors
>
> From: Randy Dunlap <rd.dunlab@gmail.com>
>
> 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@gmail.com
> Cc: Biju Das <biju.das.jz@bp.renesas.com>
> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: linux-pwm@vger.kernel.org
> ---
> v2: fix typo in Subject;
> correct my email address while infradead.org is down;
>
> 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
The below patch also works fine,
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 1c8dbb064ee5..56ab2f4b91fe 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -505,7 +505,7 @@ config PWM_ROCKCHIP
config PWM_RZ_MTU3
tristate "Renesas RZ/G2L MTU3a PWM Timer support"
- depends on RZ_MTU3 || COMPILE_TEST
+ depends on RZ_MTU3 || (COMPILE_TEST && RZ_MTU3)
depends on HAS_IOMEM
help
This driver exposes the MTU3a PWM Timer controller found in Renesas
So shall I send this fix instead.
Cheers,
Biju
On Tue, Jul 18, 2023 at 11:26:28AM +0000, Biju Das wrote:
> Hi Randy,
>
> > -----Original Message-----
> > From: Randy Dunlap <rd.dunlab@gmail.com>
> > Sent: Tuesday, July 18, 2023 7:41 AM
> > To: linux-kernel@vger.kernel.org; linux-pwm@vger.kernel.org
> > Cc: Biju Das <biju.das.jz@bp.renesas.com>; Thierry Reding
> > <thierry.reding@gmail.com>; Uwe Kleine-König <u.kleine-
> > koenig@pengutronix.de>
> > Subject: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors
> >
> > From: Randy Dunlap <rd.dunlab@gmail.com>
> >
> > 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@gmail.com
> > Cc: Biju Das <biju.das.jz@bp.renesas.com>
> > Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> > Cc: Thierry Reding <thierry.reding@gmail.com>
> > Cc: linux-pwm@vger.kernel.org
> > ---
> > v2: fix typo in Subject;
> > correct my email address while infradead.org is down;
> >
> > 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
>
>
> The below patch also works fine,
>
> diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
> index 1c8dbb064ee5..56ab2f4b91fe 100644
> --- a/drivers/pwm/Kconfig
> +++ b/drivers/pwm/Kconfig
> @@ -505,7 +505,7 @@ config PWM_ROCKCHIP
>
> config PWM_RZ_MTU3
> tristate "Renesas RZ/G2L MTU3a PWM Timer support"
> - depends on RZ_MTU3 || COMPILE_TEST
> + depends on RZ_MTU3 || (COMPILE_TEST && RZ_MTU3)
That's a bit pointless, isn't it? That effectively reduces to just:
depends on RZ_MTU3
Thierry
Hi Thierry,
Thanks for the feedback.
> -----Original Message-----
> From: Thierry Reding <thierry.reding@gmail.com>
> Sent: Tuesday, July 18, 2023 12:44 PM
> To: Biju Das <biju.das.jz@bp.renesas.com>
> Cc: Randy Dunlap <rd.dunlab@gmail.com>; linux-kernel@vger.kernel.org;
> linux-pwm@vger.kernel.org; Uwe Kleine-König <u.kleine-
> koenig@pengutronix.de>; Fabrizio Castro
> <fabrizio.castro.jz@renesas.com>; lee.jones@linaro.org; Geert
> Uytterhoeven <geert+renesas@glider.be>
> Subject: Re: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors
>
> On Tue, Jul 18, 2023 at 11:26:28AM +0000, Biju Das wrote:
> > Hi Randy,
> >
> > > -----Original Message-----
> > > From: Randy Dunlap <rd.dunlab@gmail.com>
> > > Sent: Tuesday, July 18, 2023 7:41 AM
> > > To: linux-kernel@vger.kernel.org; linux-pwm@vger.kernel.org
> > > Cc: Biju Das <biju.das.jz@bp.renesas.com>; Thierry Reding
> > > <thierry.reding@gmail.com>; Uwe Kleine-König <u.kleine-
> > > koenig@pengutronix.de>
> > > Subject: [PATCH v2] pwm: fix pwm-rz-mtu3.c build errors
> > >
> > > From: Randy Dunlap <rd.dunlab@gmail.com>
> > >
> > > 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@gmail.com
> > > Cc: Biju Das <biju.das.jz@bp.renesas.com>
> > > Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> > > Cc: Thierry Reding <thierry.reding@gmail.com>
> > > Cc: linux-pwm@vger.kernel.org
> > > ---
> > > v2: fix typo in Subject;
> > > correct my email address while infradead.org is down;
> > >
> > > 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
> >
> >
> > The below patch also works fine,
> >
> > diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index
> > 1c8dbb064ee5..56ab2f4b91fe 100644
> > --- a/drivers/pwm/Kconfig
> > +++ b/drivers/pwm/Kconfig
> > @@ -505,7 +505,7 @@ config PWM_ROCKCHIP
> >
> > config PWM_RZ_MTU3
> > tristate "Renesas RZ/G2L MTU3a PWM Timer support"
> > - depends on RZ_MTU3 || COMPILE_TEST
> > + depends on RZ_MTU3 || (COMPILE_TEST && RZ_MTU3)
>
> That's a bit pointless, isn't it? That effectively reduces to just:
>
> depends on RZ_MTU3
OK, then Uwe's solution is better.
ie, use the existing "depends on RZ_MTU3 || COMPILE_TEST"
and use
-#if IS_ENABLED(CONFIG_RZ_MTU3)
+#if IS_REACHABLE(CONFIG_RZ_MTU3) in include/linux/mfd/rz-mtu3.h
Cheers,
Biju
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