/* * (C) 2004 Bruno Ducrot * * Licensed under the terms of the GNU GPL License version 2. * * Based on code found in * linux/arch/i386/kernel/cpu/cpufreq/powernow-k8.c * and originally developed by Paul Devriendt */ #include #include #include #include #include #include #include #include #define MCPU 32 #define MSR_FIDVID_STATUS 0xc0010042 #define MSR_S_HI_CURRENT_VID 0x0000001f #define MSR_S_LO_CURRENT_FID 0x0000003f static int get_fidvid(uint32_t cpu, uint32_t *fid, uint32_t *vid) { int err = 1; uint64_t msr = 0; int fd; char file[20]; if (cpu > MCPU) goto out; sprintf(file, "/dev/cpu/%d/msr", cpu); fd = open(file, O_RDONLY); if (fd < 0) goto out; lseek(fd, MSR_FIDVID_STATUS, SEEK_CUR); if (read(fd, &msr, 8) != 8) goto err1; *fid = ((uint32_t )(msr & 0xffffffffull)) & MSR_S_LO_CURRENT_FID; *vid = ((uint32_t )(msr>>32 & 0xffffffffull)) & MSR_S_HI_CURRENT_VID; err = 0; err1: close(fd); out: return err; } /* Return a frequency in MHz, given an input fid */ static uint32_t find_freq_from_fid(uint32_t fid) { return 800 + (fid * 100); } /* Return a voltage in miliVolts, given an input vid */ static uint32_t find_millivolts_from_vid(uint32_t vid) { return 1550-vid*25; } int main (int argc, char *argv[]) { int err; int cpu; uint32_t fid, vid; if (argc < 2) cpu = 0; else cpu = strtoul(argv[1], NULL, 0); err = get_fidvid(cpu, &fid, &vid); if (err) { printf("can't get fid, vid from MSR\n"); printf("Possible trouble: you don't run a powernow-k8 capable cpu\n"); printf("or you are not root, or the msr driver is not present\n"); exit(1); } printf("cpu %d currently at %d MHz and %d mV\n", cpu, find_freq_from_fid(fid), find_millivolts_from_vid(vid)); return 0; } cbc893fd29dab9'>treecommitdiff
path: root/include/dt-bindings/clock/mt2701-clk.h
diff options
context:
space:
mode:
authorBhumika Goyal <bhumirks@gmail.com>2017-01-25 00:54:07 +0530
committerDan Williams <dan.j.williams@intel.com>2017-01-31 18:16:30 -0800
commit970d14e3989160ee9e97c7d75ecbc893fd29dab9 (patch)
tree4a731cac4efedb17f86a912ec56c151d26792abe /include/dt-bindings/clock/mt2701-clk.h
parent7a308bb3016f57e5be11a677d15b821536419d36 (diff)
nvdimm: constify device_type structures
Declare device_type structure as const as it is only stored in the type field of a device structure. This field is of type const, so add const to declaration of device_type structure. File size before: text data bss dec hex filename 19278 3199 16 22493 57dd nvdimm/namespace_devs.o File size after: text data bss dec hex filename 19929 3160 16 23105 5a41 nvdimm/namespace_devs.o Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/dt-bindings/clock/mt2701-clk.h')