Enable build testing and configuration control of the common clk
framework so that more code coverage and testing can be done on the
common clk framework across various architectures. This also nicely
removes the requirement that architectures must select the framework
when they don't use it in architecture code.
There's one snag with doing this, and that's making sure that randconfig
builds don't select this option when some architecture or platform
implements 'struct clk' outside of the common clk framework. Introduce a
new config option 'HAVE_LEGACY_CLK' to indicate those platforms that
haven't migrated to the common clk framework and therefore shouldn't be
allowed to select this new config option. Also add a note that we hope
one day to remove this config entirely.
Based on a patch by Mark Brown <broonie@kernel.org>.
Cc: Mark Brown <broonie@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: <linux-mips@vger.kernel.org>
Cc: <linux-c6x-dev@linux-c6x.org>
Cc: <linux-m68k@lists.linux-m68k.org>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: <linux-sh@vger.kernel.org>
Link: https://lore.kernel.org/r/1470915049-15249-1-git-send-email-broonie@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20200409064416.83340-8-sboyd@kernel.org
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
select CPU_ARM920T
select GENERIC_CLOCKEVENTS
select GPIOLIB
+ select HAVE_LEGACY_CLK
help
This enables support for the Cirrus EP93xx series of CPUs.
select GENERIC_IRQ_MULTI_HANDLER
select GPIOLIB
select HAVE_IDE
+ select HAVE_LEGACY_CLK
select IRQ_DOMAIN
select NEED_MACH_IO_H if PCCARD
select NEED_MACH_MEMORY_H
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select CLKDEV_LOOKUP
+ select HAVE_LEGACY_CLK
select GENERIC_ATOMIC64
select GENERIC_IRQ_SHOW
select HAVE_ARCH_TRACEHOOK
select CPU_HAS_NO_MULDIV64
select GENERIC_CSUM
select GPIOLIB
- select HAVE_CLK
+ select HAVE_LEGACY_CLK
endchoice
select SYS_SUPPORTS_ZBOOT_UART16550
select GPIOLIB
select VLYNQ
- select HAVE_CLK
+ select HAVE_LEGACY_CLK
help
Support for the Texas Instruments AR7 System-on-a-Chip
family: TNETD7100, 7200 and 7300.
select SYS_HAS_EARLY_PRINTK
select SWAP_IO_SPACE
select GPIOLIB
- select HAVE_CLK
select MIPS_L1_CACHE_SHIFT_4
select CLKDEV_LOOKUP
+ select HAVE_LEGACY_CLK
help
Support for BCM63XX based boards
select SWAP_IO_SPACE
select BOOT_RAW
select CLKDEV_LOOKUP
+ select HAVE_LEGACY_CLK
select USE_OF
select PINCTRL
select PINCTRL_LANTIQ
select CSRC_R4K if ! MIPS_EXTERNAL_TIMER
select DMA_NONCOHERENT
select GENERIC_ISA_DMA_SUPPORT_BROKEN
- select HAVE_CLK
+ select HAVE_LEGACY_CLK
select FORCE_PCI
select I8259
select IRQ_MIPS_CPU
config SOC_RT288X
bool "RT288x"
select MIPS_L1_CACHE_SHIFT_4
+ select HAVE_LEGACY_CLK
select HAVE_PCI
config SOC_RT305X
bool "RT305x"
+ select HAVE_LEGACY_CLK
config SOC_RT3883
bool "RT3883"
+ select HAVE_LEGACY_CLK
select HAVE_PCI
config SOC_MT7620
bool "MT7620/8"
select CPU_MIPSR2_IRQ_VI
+ select HAVE_LEGACY_CLK
select HAVE_PCI
config SOC_MT7621
config SH_ALPHA_BOARD
bool
+config SH_CUSTOM_CLK
+ def_bool y
+ depends on !SH_DEVICE_TREE
+ select HAVE_LEGACY_CLK
+
config SH_DEVICE_TREE
bool
select OF
def_bool y
select CPU_UCV2
select GENERIC_CLOCKEVENTS
- select HAVE_CLK
+ select HAVE_LEGACY_CLK
select GPIOLIB
# CONFIGs for ARCH_PUV3
config HAVE_CLK_PREPARE
bool
-config COMMON_CLK
+config HAVE_LEGACY_CLK # TODO: Remove once all legacy users are migrated
bool
+ select HAVE_CLK
+ help
+ Select this option when the clock API in <linux/clk.h> is implemented
+ by platform/architecture code. This method is deprecated. Modern
+ code should select COMMON_CLK instead and not define a custom
+ 'struct clk'.
+
+menuconfig COMMON_CLK
+ bool "Common Clock Framework"
+ depends on !HAVE_LEGACY_CLK
select HAVE_CLK_PREPARE
select CLKDEV_LOOKUP
select SRCU
Architectures utilizing the common struct clk should select
this option.
-menu "Common Clock Framework"
- depends on COMMON_CLK
+if COMMON_CLK
config COMMON_CLK_WM831X
tristate "Clock driver for WM831x/2x PMICs"
source "drivers/clk/uniphier/Kconfig"
source "drivers/clk/zynqmp/Kconfig"
-endmenu
+endif