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Hi All, Was looking for a patch for Dothan cpufreq support but could only find the stepping identification code here: ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.7/2.6.7-mm6/broken-out/bk-cpufreq.patch So here's a patch on top of the above patch that adds all of the dothan frequency/voltages for processors 715, 725, 735, 745, 755 Tested and working as it should so far with a 745. The stepping in the model table for the others may need to be tweaked. The Dothan processor datasheet 30218903.pdf defines 4 voltages for each frequency (VID#A through VID#D) whereas Banias only suggests a typical voltage and no min or max for each freq so i've used the OP macro to allow definition of all voltages (A through D) but the macro currently just uses VID#C at compile time (the second lowest voltage profile). The docs define these 4 profiles but don't say anywhere in which cases they should be used. I guess it may be a case of usage of the differing profiles based on the tolerance and accuracy of the power supply in use for the specific application. ~mc --- ./arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c.bk-patched 2004-08-06 11:26:05.000000000 +0800 +++ ./arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c 2004-08-06 12:42:32.000000000 +0800 @@ -198,6 +198,82 @@ OP(1700, 1484), { .frequency = CPUFREQ_TABLE_END } }; + +#undef OP + +/* Dothan processor datasheet 30218903.pdf defines 4 voltages for each + frequency (VID#A through VID#D) - this macro allows us to define all + of these but we only use the VID#C voltages at compile time - this may + need some work if we want to select the voltage profile at runtime. */ + +#define OP(mhz, mva, mvb, mvc, mvd) \ + { \ + .frequency = (mhz) * 1000, \ + .index = (((mhz)/100) << 8) | ((mvc - 700) / 16) \ + } + +/* Intel Pentium M processor 715 / 1.50GHz (Dothan) */ +static struct cpufreq_frequency_table dothan_1500[] = +{ + OP( 600, 988, 988, 988, 988), + OP( 800, 1068, 1068, 1068, 1052), + OP(1000, 1148, 1148, 1132, 1116), + OP(1200, 1228, 1212, 1212, 1180), + OP(1500, 1340, 1324, 1308, 1276), + { .frequency = CPUFREQ_TABLE_END } +}; + +/* Intel Pentium M processor 725 / 1.60GHz (Dothan) */ +static struct cpufreq_frequency_table dothan_1600[] = +{ + OP( 600, 988, 988, 988, 988), + OP( 800, 1068, 1068, 1052, 1052), + OP(1000, 1132, 1132, 1116, 1116), + OP(1200, 1212, 1196, 1180, 1164), + OP(1400, 1276, 1260, 1244, 1228), + OP(1600, 1340, 1324, 1308, 1276), + { .frequency = CPUFREQ_TABLE_END } +}; + +/* Intel Pentium M processor 735 / 1.70GHz (Dothan) */ +static struct cpufreq_frequency_table dothan_1700[] = +{ + OP( 600, 988, 988, 988, 988), + OP( 800, 1052, 1052, 1052, 1052), + OP(1000, 1116, 1116, 1116, 1100), + OP(1200, 1180, 1180, 1164, 1148), + OP(1400, 1244, 1244, 1228, 1212), + OP(1700, 1340, 1324, 1308, 1276), + { .frequency = CPUFREQ_TABLE_END } +}; + +/* Intel Pentium M processor 745 / 1.80GHz (Dothan) */ +static struct cpufreq_frequency_table dothan_1800[] = +{ + OP( 600, 988, 988, 988, 988), + OP( 800, 1052, 1052, 1052, 1036), + OP(1000, 1116, 1100, 1100, 1084), + OP(1200, 1164, 1164, 1148, 1132), + OP(1400, 1228, 1212, 1212, 1180), + OP(1600, 1292, 1276, 1260, 1228), + OP(1800, 1340, 1324, 1308, 1276), + { .frequency = CPUFREQ_TABLE_END } +}; + +/* Intel Pentium M processor 755 / 2.00GHz (Dothan) */ +static struct cpufreq_frequency_table dothan_2000[] = +{ + OP( 600, 988, 988, 988, 988), + OP( 800, 1052, 1036, 1036, 1036), + OP(1000, 1100, 1084, 1084, 1084), + OP(1200, 1148, 1132, 1132, 1116), + OP(1400, 1196, 1180, 1180, 1164), + OP(1600, 1244, 1228, 1228, 1196), + OP(1800, 1292, 1276, 1276, 1244), + OP(2000, 1340, 1324, 1308, 1276), + { .frequency = CPUFREQ_TABLE_END } +}; + #undef OP #define _BANIAS(cpuid, max, name) \ @@ -208,6 +284,13 @@ } #define BANIAS(max) _BANIAS(&cpu_id_banias, max, #max) +#define DOTHAN(cpuid, max, name) \ +{ .cpu_id = cpuid, \ + .model_name = "Intel(R) Pentium(R) M processor " name "GHz", \ + .max_freq = (max)*1000, \ + .op_points = dothan_##max, \ +} + /* CPU models, their operating frequency range, and freq/voltage operating points */ static struct cpu_model models[] = @@ -221,6 +304,11 @@ BANIAS(1500), BANIAS(1600), BANIAS(1700), + DOTHAN(&cpu_id_dothan_b0, 1500, "1.50"), /* check stepping and name */ + DOTHAN(&cpu_id_dothan_b0, 1600, "1.60"), /* check stepping and name */ + DOTHAN(&cpu_id_dothan_b0, 1700, "1.70"), /* check stepping and name */ + DOTHAN(&cpu_id_dothan_b0, 1800, "1.80"), + DOTHAN(&cpu_id_dothan_b0, 2000, "2.00"), /* check stepping and name */ { NULL, } }; #undef _BANIAS | ||||||||||
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