- 12 Aug, 2019 1 commit
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Nathan Chancellor authored
clang warns: arch/mips/kernel/branch.c:148:8: error: variable 'bc_false' is used uninitialized whenever switch case is taken [-Werror,-Wsometimes-uninitialized] case mm_bc2t_op: ^~~~~~~~~~ arch/mips/kernel/branch.c:157:8: note: uninitialized use occurs here if (bc_false) ^~~~~~~~ arch/mips/kernel/branch.c:149:8: error: variable 'bc_false' is used uninitialized whenever switch case is taken [-Werror,-Wsometimes-uninitialized] case mm_bc1t_op: ^~~~~~~~~~ arch/mips/kernel/branch.c:157:8: note: uninitialized use occurs here if (bc_false) ^~~~~~~~ arch/mips/kernel/branch.c:142:4: note: variable 'bc_false' is declared here int bc_false = 0; ^ 2 errors generated. When mm_bc1t_op and mm_bc2t_op are taken, the bc_false initialization does not happen, which leads to a garbage value upon use, as illustrated below with a small sample program. $ mipsel-linux-gnu-gcc --version | head -n1 mipsel-linux-gnu-gcc (Debian 8.3.0-2) 8.3.0 $ clang --version | head -n1 ClangBuiltLinux clang version 9.0.0 (git://github.com/llvm/llvm-project 544315b4197034a3be8acd12cba56a75fb1f08dc) (based on LLVM 9.0.0svn) $ cat test.c #include <stdio.h> static void switch_scoped(int opcode) { switch (opcode) { case 1: case 2: { int bc_false = 0; bc_false = 4; case 3: case 4: printf("\t* switch scoped bc_false = %d\n", bc_false); } } } static void function_scoped(int opcode) { int bc_false = 0; switch (opcode) { case 1: case 2: { bc_false = 4; case 3: case 4: printf("\t* function scoped bc_false = %d\n", bc_false); } } } int main(void) { int opcode; for (opcode = 1; opcode < 5; opcode++) { printf("opcode = %d:\n", opcode); switch_scoped(opcode); function_scoped(opcode); printf("\n"); } return 0; } $ mipsel-linux-gnu-gcc -std=gnu89 -static test.c && \ qemu-mipsel a.out opcode = 1: * switch scoped bc_false = 4 * function scoped bc_false = 4 opcode = 2: * switch scoped bc_false = 4 * function scoped bc_false = 4 opcode = 3: * switch scoped bc_false = 2147483004 * function scoped bc_false = 0 opcode = 4: * switch scoped bc_false = 2147483004 * function scoped bc_false = 0 $ clang -std=gnu89 --target=mipsel-linux-gnu -m32 -static test.c && \ qemu-mipsel a.out opcode = 1: * switch scoped bc_false = 4 * function scoped bc_false = 4 opcode = 2: * switch scoped bc_false = 4 * function scoped bc_false = 4 opcode = 3: * switch scoped bc_false = 2147483004 * function scoped bc_false = 0 opcode = 4: * switch scoped bc_false = 2147483004 * function scoped bc_false = 0 Move the definition up so that we get the right behavior and mark it __maybe_unused as it will not be used when CONFIG_MIPS_FP_SUPPORT isn't enabled. Fixes: 6a1cc218 ("MIPS: branch: Remove FP branch handling when CONFIG_MIPS_FP_SUPPORT=n") Link: https://github.com/ClangBuiltLinux/linux/issues/603Signed-off-by:Nathan Chancellor <natechancellor@gmail.com> Signed-off-by:
Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: clang-built-linux@googlegroups.com
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- 08 Aug, 2019 14 commits
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Paul Burton authored
Merge the Ingenic TCU patchset from the ingenic-tcu-v5.4 branch which was created to enable follow-on changes in other subsystems. Signed-off-by: -
Paul Cercueil authored
The old clocksource/timer platform code is now obsoleted by the newly introduced TCU drivers. Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Tested-by:
Mathieu Malaterre <malat@debian.org> Tested-by:
Artur Rojek <contact@artur-rojek.eu> Signed-off-by:
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Paul Cercueil authored
The default clock (12 MHz) is too fast for the system timer. Signed-off-by:
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Paul Cercueil authored
The default clock (48 MHz) is too fast for the system timer. Signed-off-by:
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Paul Cercueil authored
The default clock (12 MHz) is too fast for the system timer, which fails to report time accurately. Signed-off-by:
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Paul Cercueil authored
Add DTS nodes for the JZ4780, JZ4770 and JZ4740 devicetree files. Signed-off-by:
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Paul Cercueil authored
Add the missing TCU clock to the list of clocks supplied by the CGU for the JZ4740 SoC. Signed-off-by:
Stephen Boyd <sboyd@kernel.org> Acked-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Paul Cercueil authored
This driver handles the TCU (Timer Counter Unit) present on the Ingenic JZ47xx SoCs, and provides the kernel with a system timer, a clocksource and a sched_clock. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Paul Cercueil authored
This driver handles the interrupt controller built in the Timer/Counter Unit (TCU) of the JZ47xx SoCs from Ingenic. Signed-off-by:
Marc Zyngier <maz@kernel.org> Signed-off-by:
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Paul Cercueil authored
Add driver to support the clocks provided by the Timer/Counter Unit (TCU) of the JZ47xx SoCs from Ingenic. Signed-off-by:
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Paul Cercueil authored
device_node_to_regmap() is exactly like syscon_node_to_regmap(), but it does not check that the node is compatible with "syscon", and won't attach the first clock it finds to the regmap. The rationale behind this, is that one device node with a standard compatible string "foo,bar" can be covered by multiple drivers sharing a regmap, or by a single driver doing all the job without a regmap, but these are implementation details which shouldn't reflect on the devicetree. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Paul Cercueil authored
Add documentation about how to properly use the Ingenic TCU (Timer/Counter Unit) drivers from devicetree. Signed-off-by:
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Paul Cercueil authored
Add documentation about the Timer/Counter Unit (TCU) present in the Ingenic JZ47xx SoCs. The Timer/Counter Unit (TCU) in Ingenic JZ47xx SoCs is a multi-function hardware block. It features up to to eight channels, that can be used as counters, timers, or PWM. - JZ4725B, JZ4750, JZ4755 only have six TCU channels. The other SoCs all have eight channels. - JZ4725B introduced a separate channel, called Operating System Timer (OST). It is a 32-bit programmable timer. On JZ4770 and above, it is 64-bit. - Each one of the TCU channels has its own clock, which can be reparented to three different clocks (pclk, ext, rtc), gated, and reclocked, through their TCSR register. * The watchdog and OST hardware blocks also feature a TCSR register with the same format in their register space. * The TCU registers used to gate/ungate can also gate/ungate the watchdog and OST clocks. - Each TCU channel works in one of two modes: * mode TCU1: channels cannot work in sleep mode, but are easier to operate. * mode TCU2: channels can work in sleep mode, but the operation is a bit more complicated than with TCU1 channels. - The mode of each TCU channel depends on the SoC used: * On the oldest SoCs (up to JZ4740), all of the eight channels operate in TCU1 mode. * On JZ4725B, channel 5 operates as TCU2, the others operate as TCU1. * On newest SoCs (JZ4750 and above), channels 1-2 operate as TCU2, the others operate as TCU1. - Each channel can generate an interrupt. Some channels share an interrupt line, some don't, and this changes between SoC versions: * on older SoCs (JZ4740 and below), channel 0 and channel 1 have their own interrupt line; channels 2-7 share the last interrupt line. * On JZ4725B, channel 0 has its own interrupt; channels 1-5 share one interrupt line; the OST uses the last interrupt line. * on newer SoCs (JZ4750 and above), channel 5 has its own interrupt; channels 0-4 and (if eight channels) 6-7 all share one interrupt line; the OST uses the last interrupt line. Signed-off-by: -
Paul Cercueil authored
This header provides clock numbers for the ingenic,tcu DT binding. Signed-off-by:
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- 06 Aug, 2019 5 commits
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Arnd Bergmann authored
The generic vdso support adds the same #if hack in two places, asm/vdso/vdso.h and config-n32-o32-env.c, but only the second is actually used. The result lacks the BUILD_VDSO32_64 macro, and that triggers a build error: ./include/linux/page-flags-layout.h:95:2: error: #error "Not enough bits in page flags" Move the macro into the other place, and remove the duplicated bits. Reported-by:
Guenter Roeck <linux@roeck-us.net> Fixes: ee38d94a ("page flags: prioritize kasan bits over last-cpuid") Fixes: 24640f23 ("mips: Add support for generic vDSO") Signed-off-by:
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Paul Burton authored
ARCH_HAS_IRQ_PER_CPU is unused anywhere in the kernel - remove the definition. Signed-off-by: -
Paul Burton authored
The cpu_has_saa feature macro was added along with Cavium Octeon CPU support back in commit 5b3b1688 ("MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.") but has never been used. Remove the dead code. Signed-off-by:
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Zhou Yanjie authored
In order to further reduce power consumption, the XBurst core by default attempts to avoid branch target buffer lookups by detecting & special casing loops. This feature will cause BogoMIPS and lpj calculate in error. Set cp0 config7 bit 4 to disable this feature. Signed-off-by:
Zhou Yanjie <zhouyanjie@zoho.com> Signed-off-by:
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Zhou Yanjie authored
1.fix bugs when detecting L2 cache sets value. 2.fix bugs when detecting L2 cache ways value. Signed-off-by:
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- 30 Jul, 2019 13 commits
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Firoz Khan authored
The __SYSCALL macro's arguments are system call number, system call entry name and number of arguments for the system call. Argument- nargs in __SYSCALL(nr, entry, nargs) is neither calculated nor used anywhere. So it would be better to keep the implementaion as __SYSCALL(nr, entry). This will unifies the implementation with some other architetures too. Signed-off-by:
Firoz Khan <firoz.khan@linaro.org> Signed-off-by:
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Paul Cercueil authored
Remove all the source files that are not used anywhere anymore. Signed-off-by:
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Paul Cercueil authored
The JZ4740 boards now use the iio-hwmon driver. Signed-off-by:
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Paul Cercueil authored
It has been replaced with the more mature ingenic-battery driver. Signed-off-by:
Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by:
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Paul Cercueil authored
It has been replaced with the newer Ingenic NAND driver. Signed-off-by:
Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by:
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Paul Cercueil authored
The newer and better JZ4780 driver is now used to provide DMA functionality on the JZ4740. Signed-off-by:
Vinod Koul <vkoul@kernel.org> Signed-off-by:
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Paul Cercueil authored
The JZ4740 fbdev driver has been replaced with the ingenic-drm driver. Signed-off-by:
Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Paul Cercueil authored
The board now uses the simple-audio-card driver. Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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Paul Cercueil authored
Update the defconfig to select the new drivers instead of the old ones. Signed-off-by:
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Paul Cercueil authored
Move all the platform data to devicetree. The only bit dropped is the PWM beeper, which requires the PWM driver to be updated. I figured it's okay to remove it here since it's really a non-critical device, and it'll be re-introduced soon enough. The other change is the CS line of the SPI is now set as active low. The SPI core would have forced "active low" anyway, unless the 'spi-cs-high' property is set. In the process of moving to devicetree, we also switched to new drivers: - We use the simple-audio-card and simple-amplifier drivers instead of the custom ASoC code; - We use the new Ingenic DRM driver coupled with the GiantPlus GPM940B0 DRM panel driver instead of the old framebuffer driver; - We use the new jz4780-dma driver instead of the old jz4740-dma one; - We use the ingenic-nand and jz4740-ecc drivers instead of the old jz4740-nand driver; - We use ingenic-battery instead of jz4740-battery; - We use iio-hwmon instead of jz4740-hwmon; - We use ingenic-iio instead of the old jz4740-adc MFD driver. Signed-off-by:
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Paul Cercueil authored
Add nodes for the MMC, AIC, ADC, CODEC, MUSB, LCD, memory, and BCH controllers. Signed-off-by:
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Fabian Mewes authored
HAVE_LATENCYTOP_SUPPORT was removed all together in commit da48d094 ("Kconfig: remove HAVE_LATENCYTOP_SUPPORT"). This commit removes a leftover in the MIPS Kconfig. Signed-off-by:
Fabian Mewes <architekt@coding4coffee.org> Signed-off-by:
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Zhou Yanjie authored
Add X1000 system type for cat /proc/cpuinfo to give out X1000. Signed-off-by:
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- 26 Jul, 2019 6 commits
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Vincenzo Frascino authored
Running "make" on an already compiled kernel tree will rebuild the vdso library even if this has not been modified. $ make GEN Makefile Using linux as source for kernel CALL linux/scripts/atomic/check-atomics.sh CALL linux/scripts/checksyscalls.sh <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] CHK include/generated/compile.h VDSO arch/mips/vdso/vdso.so.dbg.raw OBJCOPY arch/mips/vdso/vdso.so.raw GENVDSO arch/mips/vdso/vdso-image.c CC arch/mips/vdso/vdso-image.o AR arch/mips/vdso/built-in.a AR arch/mips/built-in.a CHK include/generated/autoksyms.h GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o AR init/built-in.a LD vmlinux.o MODPOST vmlinux.o MODINFO modules.builtin.modinfo KSYM .tmp_kallsyms1.o KSYM .tmp_kallsyms2.o LD vmlinux SORTEX vmlinux SYSMAP System.map Building modules, stage 2. ITS arch/mips/boot/vmlinux.gz.its OBJCOPY arch/mips/boot/vmlinux.bin MODPOST 7 modules GZIP arch/mips/boot/vmlinux.bin.gz ITB arch/mips/boot/vmlinux.gz.itb The issue is generated by the fact that "if_changed" is called twice in a single target. Fix the build bug merging the two commands into a single function. Signed-off-by:
Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by:
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Vincenzo Frascino authored
The vdso library for o32 and n32 does not compile compile correctly when building outside of the source tree due to a wrong inclusion path for config-n32-o32-env.c resulting in the error below: cc1: fatal error: arch/mips/vdso/config-n32-o32-env.c: No such file or dnirectory compilation terminated. arch/mips/vdso/Makefile:153: recipe for target 'arch/mips/vdso/vgettimeofday-o32.o' failed make[3]: *** [arch/mips/vdso/vgettimeofday-o32.o] Error 1 scripts/Makefile.build:490: recipe for target 'arch/mips/vdso' failed Fix the config-n32-o32-env.c inclusion path prepending the $(srctree) variable. Signed-off-by:
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Edward Matijević authored
The Netgear R6200 v1 uses a BCM4718A1 SOC and a BCM4352/BCM4360 for 5GHz wireless. This patch adds support for detecting this model board and registers the 3 buttons. I have tested that the device can boot kernels 4.14 and 4.19 under OpenWRT. There is one issue that the LEDs on the device are controlled by a 74HC164 that uses bit-banging instead of SPI so it isn't accessible to the kernel without adding a workaround. Without any workaround the device on boot will flash all LEDs once then the power LED will remain amber as all other LEDs stay off. Signed-off-by:
Edward Matijevic <motolav@gmail.com> Acked-by:
Hauke Mehrtens <hauke@hauke-m.de> [paul.burton@mips.com: - Sort bcm47xx_board_list_board_id alphabetically by board type. - Fix whitespace. - Wrap commit message & drop OpenWRT-based justification for bcm47xx_board_list_board_id being mis-sorted.] Signed-off-by:
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Vincenzo Frascino authored
With the release of Linux 5.1 has been added a new syscall, clock_gettime64, that provided a 64 bit time value for a specified clock_ID to make the kernel Y2038 safe on 32 bit architectures. Update the mips32 specific vDSO library accordingly with what it has been done for the kernel syscall exposing the clock_gettime64 entry point. Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Signed-off-by:
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Vincenzo Frascino authored
The generic vDSO library provides an implementation of clock_getres() that can be leveraged by each architecture. Add clock_getres() entry point on mips. Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Signed-off-by:
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Vincenzo Frascino authored
The mips vDSO library requires some adaptations to take advantage of the newly introduced generic vDSO library. Introduce the following changes: - Modification of vdso.c to be compliant with the common vdso datapage - Use of lib/vdso for gettimeofday Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Signed-off-by:
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- 23 Jul, 2019 1 commit
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Paul Burton authored
Our R8000 CPU support can only be included if a system selects CONFIG_SYS_HAS_CPU_R8000. No system does, making all R8000-related CPU support dead code. Remove it. Signed-off-by:
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