>>-----Original Message----- >>From: Kevin Hilman [mailto:khilman@xxxxxxxxxxxxxxxxxxx] >>Sent: Wednesday, September 29, 2010 5:01 AM >>To: Gopinath, Thara >>Cc: linux-omap@xxxxxxxxxxxxxxx; paul@xxxxxxxxx; Cousson, Benoit; Sripathy, >>Vishwanath; Sawant, Anand >>Subject: Re: [PATCH v3 03/11] OMAP3: PM: Adding smartreflex driver support. >> >>Thara Gopinath <thara@xxxxxx> writes: >> >>> SmartReflex modules do adaptive voltage control for real-time >>> voltage adjustments. With Smartreflex the power supply voltage >>> can be adapted to the silicon performance(manufacturing process, >>> temperature induced performance, age induced performance etc). >>> >>> There are differnet classes of smartreflex implementation. >>> Class-0: Manufacturing Test Calibration >>> Class-1: Boot-Time Software Calibration >>> Class-2: Continuous Software Calibration >>> Class-3: Continuous Hardware Calibration >>> Class-4: Fully Integrated Power Management >>> >>> OMAP3 has two smartreflex modules one associated with VDD1 and the >>> other associated with VDD2. >>> This patch adds support for smartreflex driver. The driver is designed >>> for Class-1 , Class-2 and Class-3 support and is a platform driver. >>> Smartreflex driver can be enabled through a Kconfig option >>> "SmartReflex support" under "System type"->"TI OMAP implementations" menu. >>> >>> Smartreflex autocompensation feature can be enabled runtime through >>> a debug fs option. >>> To enable smartreflex autocompensation feature >>> echo 1 > /debugfs/pm_debug/smartreflex/sr_<X>/autocomp >>> To disable smartreflex autocompensation feature >>> echo 0 > /debugfs/pm_debug/smartreflex/sr_<X>/autocomp >>> >>> where X can be mpu, core , iva etc. >>> >> >>[...] >> >>> +static void sr_set_regfields(struct omap_sr *sr) >>> +{ >>> + /* >>> + * For time being these values are defined in smartreflex.h >>> + * and populated during init. May be they can be moved to board >>> + * file or pmic specific data structure. In that case these structure >>> + * fields will have to be populated using the pdata or pmic structure. >>> + */ >>> + if (cpu_is_omap34xx()) { >>> + sr->err_weight = OMAP3430_SR_ERRWEIGHT; >>> + sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT; >>> + sr->accum_data = OMAP3430_SR_ACCUMDATA; >>> + if (!(strcmp(sr->voltdm->name, "mpu"))) { >>> + sr->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT; >>> + sr->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT; >>> + } else { >>> + sr->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT; >>> + sr->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT; >>> + } >>> + } >>> + /* TODO: 3630 and Omap4 specific bit field values */ >> >>This comment is still present even after the OMAP4 series is applied. >> >>[...] >> >>> +/* >>> + * 3430 specific values. Maybe these should be passed from board file or >>> + * pmic structures. >>> + */ >>> +#define OMAP3430_SR_ACCUMDATA 0x1f4 >>> + >>> +#define OMAP3430_SR1_SENPAVGWEIGHT 0x03 >>> +#define OMAP3430_SR1_SENNAVGWEIGHT 0x03 >>> + >>> +#define OMAP3430_SR2_SENPAVGWEIGHT 0x01 >>> +#define OMAP3430_SR2_SENNAVGWEIGHT 0x01 >>> + >>> +#define OMAP3430_SR_ERRWEIGHT 0x04 >>> +#define OMAP3430_SR_ERRMAXLIMIT 0x02 >>> + >>> +/* TODO:3630/OMAP4 values if it has to come from this file */ >> >>ditto >> >>It's best to just not put these kind of things into the code in the >>first place, they tend to be forgotten and stale quickly. Will fix this and post V4. >> >>Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
