linaro-dev January 2012

linaro-dev@lists.linaro.org

125 participants
124 discussions

trouble building linux-linaro-3.0-2011.08-0

by John Rigby

I'm having trouble building the Thumb2 kernel on, I actually believe this same code worked some time ago before a toolchain update. There are actually two problems described below. I get past the first with a config change but don't know how to fix the second one. Start with mx51_defconfig, it builds uImage fine: $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- mx51_defconfig $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- uImage Save the working .config to config1 $ cp .config config1 Edit .config and remove this line then run make oldconfig. $ CONFIG_THUMB2_KERNEL is not set $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- oldconfig Answer y to THUMB2_KERNEL and THUMB2_AVOID_R_ARM_THM_JUMP11 Save new Thumb2 enabled config to config2 Here is the diff: $ diff -u config1 config2 --- config1 2011-08-21 14:50:23.014654705 -0600 +++ config2 2011-08-21 14:51:13.164654727 -0600 @@ -339,9 +339,10 @@ CONFIG_PREEMPT_VOLUNTARY=y # CONFIG_PREEMPT is not set CONFIG_HZ=100 -# CONFIG_THUMB2_KERNEL is not set +CONFIG_THUMB2_KERNEL=y +CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11=y +CONFIG_ARM_ASM_UNIFIED=y CONFIG_AEABI=y -# CONFIG_OABI_COMPAT is not set # CONFIG_ARCH_SPARSEMEM_DEFAULT is not set # CONFIG_ARCH_SELECT_MEMORY_MODEL is not set CONFIG_HAVE_ARCH_PFN_VALID=y @@ -1417,7 +1418,6 @@ # CONFIG_DEBUG_SG is not set # CONFIG_DEBUG_NOTIFIERS is not set # CONFIG_DEBUG_CREDENTIALS is not set -CONFIG_FRAME_POINTER=y # CONFIG_BOOT_PRINTK_DELAY is not set # CONFIG_RCU_TORTURE_TEST is not set # CONFIG_BACKTRACE_SELF_TEST is not set @@ -1429,7 +1429,6 @@ # CONFIG_SYSCTL_SYSCALL_CHECK is not set # CONFIG_DEBUG_PAGEALLOC is not set CONFIG_HAVE_FUNCTION_TRACER=y -CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_C_RECORDMCOUNT=y Attempt to build this: $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- uImage ... LD init/built-in.o LD .tmp_vmlinux1 arch/arm/kernel/built-in.o: In function `get_wchan': early_printk.c:(.text+0x1400): undefined reference to `unwind_frame' arch/arm/kernel/built-in.o: In function `walk_stackframe': early_printk.c:(.text+0x2832): undefined reference to `unwind_frame' make: *** [.tmp_vmlinux1] Error 1 Poke around a bit and it looks like setting ARM_UNWIND could make difference so try that. Edit .config the remove # CONFIG_ARM_UNWIND is not set then run make old config again. $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- oldconfig Call the result config3 $ cp .config config3 So here is the cumulative diff $ diff -u config1 config3 --- config1 2011-08-21 14:50:23.014654705 -0600 +++ config3 2011-08-21 14:54:29.584654811 -0600 @@ -339,9 +339,10 @@ CONFIG_PREEMPT_VOLUNTARY=y # CONFIG_PREEMPT is not set CONFIG_HZ=100 -# CONFIG_THUMB2_KERNEL is not set +CONFIG_THUMB2_KERNEL=y +CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11=y +CONFIG_ARM_ASM_UNIFIED=y CONFIG_AEABI=y -# CONFIG_OABI_COMPAT is not set # CONFIG_ARCH_SPARSEMEM_DEFAULT is not set # CONFIG_ARCH_SELECT_MEMORY_MODEL is not set CONFIG_HAVE_ARCH_PFN_VALID=y @@ -1417,7 +1418,6 @@ # CONFIG_DEBUG_SG is not set # CONFIG_DEBUG_NOTIFIERS is not set # CONFIG_DEBUG_CREDENTIALS is not set -CONFIG_FRAME_POINTER=y # CONFIG_BOOT_PRINTK_DELAY is not set # CONFIG_RCU_TORTURE_TEST is not set # CONFIG_BACKTRACE_SELF_TEST is not set @@ -1429,7 +1429,6 @@ # CONFIG_SYSCTL_SYSCALL_CHECK is not set # CONFIG_DEBUG_PAGEALLOC is not set CONFIG_HAVE_FUNCTION_TRACER=y -CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_C_RECORDMCOUNT=y @@ -1443,7 +1442,7 @@ # CONFIG_KGDB is not set # CONFIG_TEST_KSTRTOX is not set # CONFIG_STRICT_DEVMEM is not set -# CONFIG_ARM_UNWIND is not set +CONFIG_ARM_UNWIND=y # CONFIG_DEBUG_USER is not set CONFIG_DEBUG_LL=y CONFIG_EARLY_PRINTK=y Try building again. $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- uImage ... LD vmlinux SYSMAP System.map SYSMAP .tmp_System.map OBJCOPY arch/arm/boot/Image Kernel: arch/arm/boot/Image is ready AS arch/arm/boot/compressed/head.o arch/arm/boot/compressed/head.S: Assembler messages: arch/arm/boot/compressed/head.S:127: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr' arch/arm/boot/compressed/head.S:134: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr' arch/arm/boot/compressed/head.S:136: Error: selected processor does not support requested special purpose register -- `msr cpsr_c,r2' make[2]: *** [arch/arm/boot/compressed/head.o] Error 1 make[1]: *** [arch/arm/boot/compressed/vmlinux] Error 2 make: *** [uImage] Error 2 Here is my gcc version: $ arm-linux-gnueabi-gcc --version arm-linux-gnueabi-gcc (Ubuntu/Linaro 4.6.1-5ubuntu2~ppa1) 4.6.1 Copyright (C) 2011 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. And as version: GNU assembler (GNU Binutils for Ubuntu) 2.21.52.20110707 Copyright 2011 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or later. This program has absolutely no warranty. This assembler was configured for a target of `arm-linux-gnueabi'. Three configs attached: config1 -- original config from make mx51_defconfig config2 -- config after turning on thumb2 config3 -- config after setting ARM_UNWIND Any help would be appreciated. Thanks John

12 years, 2 months

Initial Linaro+Android kernel for 11.12 is available

by john stultz

Zach reminded me that this month is compressed, so a linaro+android kernel would be needed immediately for 11.12. As Andrey is just ramping up in taking over for the Linaro Android kernel maintenance, I wanted to just get a kernel out, using the older kernel workflow, so that we had something current for 11.12. Anyway. This is straight from Andy Green's linaro-androidization-tracking branch, with a few small build fixes added on that I found in my testing and the base android_*_defconfig files. You can find the tree here: git://android.git.linaro.org/kernel/linaro-android.git linaro-android-3.2-agreen-rebase The current sha is tagged as: linux-linaro-3.2-2011.12-0-android-0 Known issues: There seems to be something in the androidization branch that is causing problems on beagle xm and origen. In my testing beagle xm kernel ends up hanging in mid-boot(after ~4 seconds). And the orgien board doesn't show anything past "Uncompressing Linux... done, booting the kernel". If I drop the androidization patches and go back to the v3.2-rc4 base, both kernels boot until the Android userland environment starts and falls over because the android features are missing. I mucked about for awhile on both of these tonight, but wasn't able to solve either of them, so I'd appreciate any help trying to narrow down what is wrong on Origen (beagle is apparently lower priority). Andy, one issue with the re-factored android patch tree: Its not very bisect-able. If I jump back to a topic branch, frequently there are missing dependencies that keep it from building. Any thoughts on how we can better chase down these sorts of issues? thanks -john

12 years, 2 months

Screen going black with power saving disabled

by E V

Greetings, I have disabled power saving features in linaro ubuntu 11.10 on a PandaBoard, in order to prevent the screen going black, since there is no mouse nor keyboard attached to the board (It is simply displaying videos, in a closed loop). But when I reboot (Or power up after a time with the board off) sometimes this works, and sometimes not. There seems not to be any kind of rule for it to work, it can fail 5 or 6 times (going black after 10 minutes, even when it is set to "never"), and later work ok for 3 or 4 reboots. And then, fail again. Can anyone enlighten me a bit? Sorry for the joke, but my brain is almost as dark as black the screen goes... thanks in advance,

12 years, 2 months

LiveBuild failure creating nano image

by Matt Waddel

Hi, I have encountered a failure running live-build that I could use some help debugging. Using the instructions in the LiveBuild wiki page: https://wiki.linaro.org/Platform/DevPlatform/CrossCompile/LiveBuild the procedure fails during the adduser step. The failure is: I: create linaro user Can't set $0 with prctl(): Bad address at /usr/sbin/adduser line 86. Here is the perl code around line 86 in adduser: ---- my %config; # configuration hash my @defaults = ("/etc/adduser.conf"); my $nogroup_id = getgrnam("nogroup") || 65534; $0 =~ s+.*/++; <<<<<<<<< Line 86 >>>>>>>>>>> ---- This is the call to adduser from the 01-setup_user_linaro.chroot script that causes the problem: adduser --gecos linaro --disabled-login linaro The funny thing about this failure, if I chroot into the build area and run that command manually, everything works fine. 1st, what is that perl command doing? 2nd, anybody have any ideas on what would cause this failure? TIA, Matt

12 years, 2 months

[PATCH] SMDK5250: Add ethernet support

by Chander Kashyap

This patch enable support for SMC911X based ethernet device. Signed-off-by: Chander Kashyap <chander.kashyap(a)linaro.org> --- board/samsung/smdk5250/smdk5250.c | 89 +++++++++++++++++++++++++++++++++++++ include/configs/smdk5250.h | 13 +++++- 2 files changed, 100 insertions(+), 2 deletions(-) diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c index 2684620..a1b1a48 100644 --- a/board/samsung/smdk5250/smdk5250.c +++ b/board/samsung/smdk5250/smdk5250.c @@ -31,10 +31,95 @@ DECLARE_GLOBAL_DATA_PTR; struct exynos5_gpio_part1 *gpio1; +static void smc9115_pre_init(void) +{ + u32 smc_bw_conf, smc_bc_conf; + int i; + + /* + * SROM:CS1 and EBI + * + * GPY0[0] SROM_CSn[0] + * GPY0[1] SROM_CSn[1](2) + * GPY0[2] SROM_CSn[2] + * GPY0[3] SROM_CSn[3] + * GPY0[4] EBI_OEn(2) + * GPY0[5] EBI_EEn(2) + * + * GPY1[0] EBI_BEn[0](2) + * GPY1[1] EBI_BEn[1](2) + * GPY1[2] SROM_WAIT(2) + * GPY1[3] EBI_DATA_RDn(2) + */ + s5p_gpio_cfg_pin(&gpio1->y0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2)); + s5p_gpio_cfg_pin(&gpio1->y0, 4, GPIO_FUNC(2)); + s5p_gpio_cfg_pin(&gpio1->y0, 5, GPIO_FUNC(2)); + + for (i = 0; i < 4; i++) + s5p_gpio_cfg_pin(&gpio1->y1, i, GPIO_FUNC(2)); + + /* + * EBI: 8 Addrss Lines + * + * GPY3[0] EBI_ADDR[0](2) + * GPY3[1] EBI_ADDR[1](2) + * GPY3[2] EBI_ADDR[2](2) + * GPY3[3] EBI_ADDR[3](2) + * GPY3[4] EBI_ADDR[4](2) + * GPY3[5] EBI_ADDR{5](2) + * GPY3[6] EBI_ADDR[6](2) + * GPY3[7] EBI_ADDR{7](2) + * + * EBI: 16 Data Lines + * + * GPY5[0] EBI_DATA[0](2) + * GPY5[1] EBI_DATA[1](2) + * GPY5[2] EBI_DATA[2](2) + * GPY5[3] EBI_DATA[3](2) + * GPY5[4] EBI_DATA[4](2) + * GPY5[5] EBI_DATA{5](2) + * GPY5[6] EBI_DATA[6](2) + * GPY5[7] EBI_DATA{7](2) + * + * GPY6[0] EBI_DATA[8](2) + * GPY6[1] EBI_DATA[9](2) + * GPY6[2] EBI_DATA[10](2) + * GPY6[3] EBI_DATA110](2) + * GPY6[4] EBI_DATA[12](2) + * GPY6[5] EBI_DATA{13](2) + * GPY6[6] EBI_DATA[14](2) + * GPY6[7] EBI_DATA{15](2) + */ + for (i = 0; i < 8; i++) { + s5p_gpio_cfg_pin(&gpio1->y3, i, GPIO_FUNC(2)); + s5p_gpio_set_pull(&gpio1->y3, i, GPIO_PULL_UP); + + s5p_gpio_cfg_pin(&gpio1->y5, i, GPIO_FUNC(2)); + s5p_gpio_set_pull(&gpio1->y5, i, GPIO_PULL_UP); + + s5p_gpio_cfg_pin(&gpio1->y6, i, GPIO_FUNC(2)); + s5p_gpio_set_pull(&gpio1->y6, i, GPIO_PULL_UP); + } + + /* Ethernet needs data bus width of 16 bits */ + smc_bw_conf = SROMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK) + | SROMC_BYTE_ENABLE(CONFIG_ENV_SROM_BANK); + + smc_bc_conf = SROMC_BC_TACS(0x01) | SROMC_BC_TCOS(0x01) + | SROMC_BC_TACC(0x06) | SROMC_BC_TCOH(0x01) + | SROMC_BC_TAH(0x0C) | SROMC_BC_TACP(0x09) + | SROMC_BC_PMC(0x01); + + /* Select and configure the SROMC bank */ + s5p_config_sromc(CONFIG_ENV_SROM_BANK, smc_bw_conf, smc_bc_conf); +} + int board_init(void) { gpio1 = (struct exynos5_gpio_part1 *) samsung_get_base_gpio_part1(); + smc9115_pre_init(); + gd->bd->bi_boot_params = (PHYS_SDRAM_1 + 0x100UL); return 0; } @@ -79,6 +164,10 @@ void dram_init_banksize(void) gd->bd->bi_dram[7].size = get_ram_size((long *)PHYS_SDRAM_8, \ PHYS_SDRAM_8_SIZE); } +int board_eth_init(bd_t *bis) +{ + return smc911x_initialize(0, CONFIG_SMC911X_BASE); +} #ifdef CONFIG_DISPLAY_BOARDINFO int checkboard(void) diff --git a/include/configs/smdk5250.h b/include/configs/smdk5250.h index 6f2ef4c..4ad4bd2 100644 --- a/include/configs/smdk5250.h +++ b/include/configs/smdk5250.h @@ -98,8 +98,7 @@ #define CONFIG_CMD_MMC #define CONFIG_CMD_EXT2 #define CONFIG_CMD_FAT -#undef CONFIG_CMD_NET -#undef CONFIG_CMD_NFS +#define CONFIG_CMD_NET #define CONFIG_BOOTDELAY 3 #define CONFIG_ZERO_BOOTDELAY_CHECK @@ -196,6 +195,16 @@ #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_LOAD_ADDR - 0x1000000) #define MMC_MAX_CHANNEL 5 +/* Ethernet Controllor Driver */ +#ifdef CONFIG_CMD_NET +#define CONFIG_NET_MULTI +#define CONFIG_SMC911X +#define CONFIG_SMC911X_BASE 0x5000000 +#define CONFIG_SMC911X_16_BIT +#define CONFIG_ENV_SROM_BANK 1 +#define CONFIG_ETHADDR "00:40:5c:26:0a:5b" +#endif /*CONFIG_CMD_NET*/ + /* Enable devicetree support */ #define CONFIG_OF_LIBFDT -- 1.7.5.4

12 years, 2 months

[PATCH] ARM: pl330: fix null pointer dereference in pl330_chan_ctrl()

by Mans Rullgard

This fixes the thrd->req_running field being accessed before thrd is checked for null. The error was introduced in abb959f. Signed-off-by: Mans Rullgard <mans.rullgard(a)linaro.org> --- arch/arm/common/pl330.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/arch/arm/common/pl330.c b/arch/arm/common/pl330.c index 8d8df74..67abef5 100644 --- a/arch/arm/common/pl330.c +++ b/arch/arm/common/pl330.c @@ -1496,12 +1496,13 @@ int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op) struct pl330_thread *thrd = ch_id; struct pl330_dmac *pl330; unsigned long flags; - int ret = 0, active = thrd->req_running; + int ret = 0, active; if (!thrd || thrd->free || thrd->dmac->state == DYING) return -EINVAL; pl330 = thrd->dmac; + active = thrd->req_running; spin_lock_irqsave(&pl330->lock, flags); -- 1.7.8.3

12 years, 2 months

[RFC PATCH 0/2] thermal: Add generic cpu cooling devices according to thermal framework

by Amit Daniel Kachhap

PATCH 1) [thermal: Add a new trip type to use cooling device instance number] This patch adds a new trip type THERMAL_TRIP_STATE_ACTIVE which passes cooling device instance number and may be helpful for cpufreq cooling devices to take the correct cooling action. PATCH 2) [thermal: Add generic cpu cooling implementation] This patch adds generic cpu cooling low level implementation through frequency clipping and cpu hotplug. In future, other cpu related cooling devices may be added here. An ACPI version of this already exists(drivers/acpi/processor_thermal.c). But this will be useful for platforms like ARM using the generic thermal interface along with the generic cpu cooling devices. The cooling device registration API's return cooling device pointers which can be easily binded with the thermal zone trip points. Amit Daniel Kachhap (2): thermal: Add a new trip type to use cooling device instance number thermal: Add generic cpu cooling implementation Documentation/thermal/cpu-cooling-api.txt | 52 +++++ Documentation/thermal/sysfs-api.txt | 4 +- drivers/thermal/Kconfig | 11 + drivers/thermal/Makefile | 1 + drivers/thermal/cpu_cooling.c | 302 +++++++++++++++++++++++++++++ drivers/thermal/thermal_sys.c | 27 +++- include/linux/cpu_cooling.h | 45 +++++ include/linux/thermal.h | 1 + 8 files changed, 440 insertions(+), 3 deletions(-) create mode 100644 Documentation/thermal/cpu-cooling-api.txt create mode 100644 drivers/thermal/cpu_cooling.c create mode 100644 include/linux/cpu_cooling.h

12 years, 2 months

[linux-pm][RFC PATCH] thermal: Add support to report cooling statistics achieved by cooling devices

by Amit Daniel Kachhap

Add a sysfs node code to report effective cooling of all cooling devices attached to each trip points of a thermal zone. The cooling data reported will be absolute if the higher temperature trip points are arranged first otherwise the cooling stats is the cumulative effect of the earlier invoked cooling handlers. The basic assumption is that cooling devices will bring down the temperature in a symmetric manner and those statistics can be stored back and used for further tuning of the system. Signed-off-by: Amit Daniel Kachhap <amit.kachhap(a)linaro.org> --- Documentation/thermal/sysfs-api.txt | 10 ++++ drivers/thermal/thermal_sys.c | 96 +++++++++++++++++++++++++++++++++++ include/linux/thermal.h | 8 +++ 3 files changed, 114 insertions(+), 0 deletions(-) diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index b61e46f..1db9a9d 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -209,6 +209,13 @@ passive Valid values: 0 (disabled) or greater than 1000 RW, Optional +trip_stats + This attribute presents the effective cooling generated from all the + cooling devices attached to a trip point. The output is a pair of value + for each trip point. Each pair represents + (trip index, cooling temperature difference in millidegree Celsius) + RO, Optional + ***************************** * Cooling device attributes * ***************************** @@ -261,6 +268,9 @@ method, the sys I/F structure will be built like this: |---cdev0_trip_point: 1 /* cdev0 can be used for passive */ |---cdev1: --->/sys/class/thermal/cooling_device3 |---cdev1_trip_point: 2 /* cdev1 can be used for active[0]*/ + |---trip_stats 0 0 + 1 8000 /*trip 1 causes 8 degree Celsius drop*/ + 2 3000 /*trip 2 causes 3 degree Celsius drop*/ |cooling_device0: |---type: Processor diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index dd9a574..47e7b6e 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -92,6 +92,64 @@ static void release_idr(struct idr *idr, struct mutex *lock, int id) if (lock) mutex_unlock(lock); } +static void update_cooling_stats(struct thermal_zone_device *tz, long cur_temp) +{ + int count, max_index, cur_interval; + long trip_temp, max_temp = 0, cool_temp; + static int last_trip_level = -1; + + if (cur_temp >= tz->last_temperature) + return; + + /* find the trip according to last temperature */ + for (count = 0; count < tz->trips; count++) { + tz->ops->get_trip_temp(tz, count, &trip_temp); + if (tz->last_temperature >= trip_temp) { + if (max_temp < trip_temp) { + max_temp = trip_temp; + max_index = count; + } + } + } + + if (!max_temp) { + last_trip_level = -1; + return; + } + + cur_interval = tz->stat[max_index].interval_ptr; + cool_temp = tz->last_temperature - cur_temp; + + if (last_trip_level != max_index) { + if (++cur_interval == INTERVAL_HISTORY) + cur_interval = 0; + tz->stat[max_index].cool_temp[cur_interval] = cool_temp; + tz->stat[max_index].interval_ptr = cur_interval; + last_trip_level = max_index; + } else { + tz->stat[max_index].cool_temp[cur_interval] += cool_temp; + } +} + +static int calculate_cooling_temp_avg(struct thermal_zone_device *tz, int trip, + int *avg_cool) +{ + int result = 0, count = 0, used_data = 0; + + if (trip > THERMAL_MAX_TRIPS) + return -EINVAL; + + *avg_cool = 0; + for (count = 0; count < INTERVAL_HISTORY; count++) { + if (tz->stat[trip].cool_temp[count] > 0) { + *avg_cool += tz->stat[trip].cool_temp[count]; + used_data++; + } + } + if (used_data > 1) + *avg_cool = (*avg_cool)/used_data; + return result; +} /* sys I/F for thermal zone */ @@ -493,6 +551,26 @@ temp_crit_show(struct device *dev, struct device_attribute *attr, return sprintf(buf, "%ld\n", temperature); } +static ssize_t +thermal_cooling_trip_stats_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + int avg_cool = 0, result, trip_index; + ssize_t len = 0; + + for (trip_index = 0; trip_index < tz->trips; trip_index++) { + result = calculate_cooling_temp_avg(tz, + trip_index, &avg_cool); + if (!result) + len += sprintf(buf + len, "%d %d\n", + trip_index, avg_cool); + } + return len; +} +static DEVICE_ATTR(trip_stats, 0444, + thermal_cooling_trip_stats_show, NULL); static struct thermal_hwmon_device * thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) @@ -1049,6 +1127,8 @@ void thermal_zone_device_update(struct thermal_zone_device *tz) goto leave; } + update_cooling_stats(tz, temp); + for (count = 0; count < tz->trips; count++) { tz->ops->get_trip_type(tz, count, &trip_type); tz->ops->get_trip_temp(tz, count, &trip_temp); @@ -1181,6 +1261,13 @@ struct thermal_zone_device *thermal_zone_device_register(char *type, return ERR_PTR(result); } + /*Allocate variables for cooling stats*/ + tz->stat = devm_kzalloc(&tz->device, + sizeof(struct thermal_cooling_stats) * trips, + GFP_KERNEL); + if (!tz->stat) + goto unregister; + /* sys I/F */ if (type) { result = device_create_file(&tz->device, &dev_attr_type); @@ -1207,6 +1294,12 @@ struct thermal_zone_device *thermal_zone_device_register(char *type, passive = 1; } + if (trips > 0) { + result = device_create_file(&tz->device, &dev_attr_trip_stats); + if (result) + goto unregister; + } + if (!passive) result = device_create_file(&tz->device, &dev_attr_passive); @@ -1282,6 +1375,9 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) for (count = 0; count < tz->trips; count++) TRIP_POINT_ATTR_REMOVE(&tz->device, count); + if (tz->trips > 0) + device_remove_file(&tz->device, &dev_attr_trip_stats); + thermal_remove_hwmon_sysfs(tz); release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); idr_destroy(&tz->idr); diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 47b4a27..47504c7 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -72,6 +72,13 @@ struct thermal_cooling_device_ops { #define THERMAL_TRIPS_NONE -1 #define THERMAL_MAX_TRIPS 12 #define THERMAL_NAME_LENGTH 20 +#define INTERVAL_HISTORY 12 + +struct thermal_cooling_stats { + int cool_temp[INTERVAL_HISTORY]; + int interval_ptr; +}; + struct thermal_cooling_device { int id; char type[THERMAL_NAME_LENGTH]; @@ -102,6 +109,7 @@ struct thermal_zone_device { struct list_head cooling_devices; struct idr idr; struct mutex lock; /* protect cooling devices list */ + struct thermal_cooling_stats *stat; struct list_head node; struct delayed_work poll_queue; }; -- 1.7.1

12 years, 2 months

[PATCH V6 0/7] add a generic cpufreq driver

by Richard Zhao

The driver is based on clock and regulator APIs and support single core and multi core ARM SoCs. For multi core, it assume all cores share the same clock and voltage. Thanks Arnd, Mark, Jamie, Shawn, Rob, for your review. Changes in V6: - add scaling_available_freqs Changes in V5: - add more comments - rename trans-latency to clk-trans-latency, and it only describe clk latency. Regulator latency is got from regulator_set_voltage_time. Changes in v4: - add depends on HAVE_CLK && OF && REGULATOR - add set_cpu_freq fail check - regulator_put wehn module exit - add pr_fmt and convert all printk to pr_xxx - use voltage range - comment and doc fix - add cpu_volts value pre-check in module init - add helpfull module parameter max_freq - remove compatible string check on Arnd's comment. - remove generic-cpufreq to clk-reg-cpufreq Changes in v3: - move adjusting smp loops_per_jiffy to arm common code, and also adjust global loops_per_jiffy. - remove adjusting loops_per_jiffy in imx and omap cpufreq drivers. - check compatible "generic-cpufreq" when module_init - change printk to pr_xxx - add generic-cpufreq DT binding doc Changes in v2: - add volatage change support - change '_' in property name to '-' - use initial value to calculate loops_per_jiffy - fix reading cpu_volts property bug - let cpufreq_frequency_table_cpuinfo routines handle cpu_freq_khz_max/min - don't change freq in arm_cpufreq_exit, because every core share the same freq. - use unsigned long describe frequency as much as possible. Because clk use unsigned long, but cpufreq use unsigned int. [PATCH V6 1/7] ARM: add cpufreq transiton notifier to adjust [PATCH V6 2/7] arm/imx: cpufreq: remove loops_per_jiffy recalculate [PATCH V6 3/7] cpufreq: OMAP: remove loops_per_jiffy recalculate for [PATCH V6 4/7] cpufreq: add clk-reg cpufreq driver [PATCH V6 5/7] dts/imx6q: add cpufreq property [PATCH V6 6/7] arm/imx6q: register arm_clk as cpu to clkdev [PATCH V6 7/7] arm/imx6q: select ARCH_HAS_CPUFREQ Thanks Richard

12 years, 2 months

Connect Sessions from the Developer Platform Team

by Ricardo Salveti

Hey folks, As usual, follows a list of the sessions the Developer Platform Team will lead at this Connect: Ubuntu LEB and LAVA: Current status and future planning for proper image testing and validation https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… Improvements and future discussions for LTs and the Ubuntu LEB https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… Packaged Kernel CI: Current Status and Next Steps https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… Sysroots: Automation, Maintenance and Future Work https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… U-Boot-Linaro Future Planning https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… Developer Platform: Future Planning https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… Cross Build with Multi-Arch: Current state and future planning https://blueprints.launchpad.net/linaro-ubuntu/+spec/linaro-platforms-q112-… Please make sure you subscribe to the ones you'd like to attend, and also add yourself as 'essential' to the ones you really like to participate (so the scheduler can find a free spot that's also available for you). This is not yet the final list, as we'll probably have additional ones until the end of the week, but you can always look for all the sessions related with the Developer Platform Team at https://blueprints.launchpad.net/linaro-ubuntu?searchtext=linaro-platforms-… Thanks, -- Ricardo Salveti de Araujo

12 years, 2 months

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linaro-dev January 2012