[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230210115625.GA30942@pengutronix.de>
Date: Fri, 10 Feb 2023 12:56:25 +0100
From: Philipp Zabel <p.zabel@...gutronix.de>
To: Peter Rosin <peda@...ntia.se>
Cc: Randy Dunlap <rdunlap@...radead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mux: mmio: select REGMAP as the code has that dependency
On Fri, Feb 10, 2023 at 11:46:42AM +0100, Peter Rosin wrote:
> If CONFIG_REGMAP is not active, the build errors out like this:
The driver used to have an indirect dependency on CONFIG_REGMAP via
CONFIG_MFD_SYSCON -> CONFIG_REGMAP_MMIO -> CONFIG_REGMAP until
commit 8ecfaca7926f ("mux: mmio: add generic regmap bitfield-based
multiplexer").
> ../drivers/mux/mmio.c: In function ‘mux_mmio_probe’:
> ../drivers/mux/mmio.c:76:34: error: storage size of ‘field’ isn’t known
> 76 | struct reg_field field;
> | ^~~~~
> In file included from ../include/linux/bits.h:21,
> from ../include/linux/bitops.h:6,
> from ../drivers/mux/mmio.c:8:
> ../include/linux/bits.h:23:28: error: first argument to ‘__builtin_choose_expr’ not a constant
> 23 | (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
> | ^~~~~~~~~~~~~~~~~~~~~
> ../include/linux/build_bug.h:16:62: note: in definition of macro ‘BUILD_BUG_ON_ZERO’
> 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
> | ^
> ../include/linux/bits.h:37:10: note: in expansion of macro ‘GENMASK_INPUT_CHECK’
> 37 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
> | ^~~~~~~~~~~~~~~~~~~
> ../drivers/mux/mmio.c:96:29: note: in expansion of macro ‘GENMASK’
> 96 | if (mask != GENMASK(field.msb, field.lsb)) {
> | ^~~~~~~
> ../include/linux/build_bug.h:16:51: error: bit-field ‘<anonymous>’ width not an integer constant
> 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
> | ^
> ../include/linux/bits.h:23:10: note: in expansion of macro ‘BUILD_BUG_ON_ZERO’
> 23 | (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
> | ^~~~~~~~~~~~~~~~~
> ../include/linux/bits.h:37:10: note: in expansion of macro ‘GENMASK_INPUT_CHECK’
> 37 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
> | ^~~~~~~~~~~~~~~~~~~
> ../drivers/mux/mmio.c:96:29: note: in expansion of macro ‘GENMASK’
> 96 | if (mask != GENMASK(field.msb, field.lsb)) {
> | ^~~~~~~
> ../drivers/mux/mmio.c:102:29: error: implicit declaration of function ‘devm_regmap_field_alloc’ [-Werror=implicit-function-declaration]
> 102 | fields[i] = devm_regmap_field_alloc(dev, regmap, field);
> | ^~~~~~~~~~~~~~~~~~~~~~~
> ../drivers/mux/mmio.c:76:34: warning: unused variable ‘field’ [-Wunused-variable]
> 76 | struct reg_field field;
> | ^~~~~
>
Fixes: 8ecfaca7926f ("mux: mmio: add generic regmap bitfield-based multiplexer")
> Reported by: Randy Dunlap <rdunlap@...radead.org>
> Link: https://lore.kernel.org/lkml/64cf625b-2495-2382-0331-519d1cab0adf@infradead.org/
> Signed-off-by: Peter Rosin <peda@...ntia.se>
> ---
> drivers/mux/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> Note, there is a patch in linux-next that removes "|| COMPILE_TEST" from depends.
>
> Cheers,
> Peter
>
> diff --git a/drivers/mux/Kconfig b/drivers/mux/Kconfig
> index 80f015cf6e54..9234f8c400ca 100644
> --- a/drivers/mux/Kconfig
> +++ b/drivers/mux/Kconfig
> @@ -48,6 +48,7 @@ config MUX_GPIO
> config MUX_MMIO
> tristate "MMIO/Regmap register bitfield-controlled Multiplexer"
> depends on OF
> + select REGMAP
I get a dependency loop with this:
drivers/net/ethernet/arc/Kconfig:19:error: recursive dependency detected!
drivers/net/ethernet/arc/Kconfig:19:symbol ARC_EMAC_CORE is selected by ARC_EMAC
drivers/net/ethernet/arc/Kconfig:26:symbol ARC_EMAC depends on OF_IRQ
drivers/of/Kconfig:69:symbol OF_IRQ depends on IRQ_DOMAIN
kernel/irq/Kconfig:60:symbol IRQ_DOMAIN is selected by REGMAP
drivers/base/regmap/Kconfig:6:symbol REGMAP is selected by MUX_MMIO
drivers/mux/Kconfig:48:symbol MUX_MMIO depends on MULTIPLEXER
drivers /mux/Kconfig:6:symbol MULTIPLEXER is selected by MDIO_BUS_MUX_MULTIPLEXER
drivers/net/mdio/Kconfig:261:symbol MDIO_BUS_MUX_MULTIPLEXER depends on MDIO_DEVICE
drivers/net/mdio/Kconfig:6:symbol MDIO_DEVICE is selected by PHYLIB
drivers/net/phy/Kconfig:16:symbol PHYLIB is selected by ARC_EMAC_CORE
(on next-20230210).
regards
Philipp
Powered by blists - more mailing lists