From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nagendra" Subject: RE: OMAP3 - PM - Question - Disabling CLKEN and HFCLKOUT signals from TWL4030 scripts Date: Mon, 24 Jan 2011 22:20:26 +0530 Message-ID: <00d701cbbbe6$d15bfd10$7413f730$@com> References: <005301cbb947$6d682730$48387590$@com> <23149.10.24.255.17.1295604867.squirrel@dbdmail.itg.ti.com> <001501cbb993$b25c0fe0$17142fa0$@com> <44872.10.24.255.17.1295846556.squirrel@dbdmail.itg.ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-fx0-f46.google.com ([209.85.161.46]:47693 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753756Ab1AXQuU (ORCPT ); Mon, 24 Jan 2011 11:50:20 -0500 Received: by fxm20 with SMTP id 20so4220333fxm.19 for ; Mon, 24 Jan 2011 08:50:19 -0800 (PST) In-Reply-To: <44872.10.24.255.17.1295846556.squirrel@dbdmail.itg.ti.com> Content-Language: en-us Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: 'Lesly A M' Cc: linux-omap@vger.kernel.org, ratheesh@mistralsolutions.com Hi Lesly, > Hi Nagendra, > >> Hi All, >> >> We are working on Power management on OMAP3 (3530) and I am trying to >> disable CLKEN and HFCLKOUT through TWL4030 power scripts. However we have >> not been able to achieve this. >> >> Following are the changes and tests done so far. >> >> - VAUX1, CLKEN and HFCLKOUT were assigned to P1 group. >> - Wrote Singular messages to turn on/off these signals in TWL4030 scripts. >> - We observed that VAUX1 is able to switch ON/OFF properly as per the > script >> but HFCLKOUT and CLKEN are not behaving as expected. >> - However if we try writing CLKEN_DEV_GRP to zero, CLKEN is going low. >> - We have made sure that SYS_OFF_MODE and CLK_REQ signals go low during > the >> system OFF mode, LVL_WAKEUP bit enabled in Px_SW_EVENTS, and STS_CHG bit > in >> STS_HW_CONDITIONS is zero. >> >> Is there anything that I am missing? Kindly let me know. > > Did try probing the sys_clkreq from OMAP? > Yes nSLEEP1, nSLEEP2 and SYS_CLK_REQ signals go low during system > OFF mode. > > Are you sending SLEEP/OFF command in singular msg? > Yes. > > Also check the HFCLKOUT_REMAP register for SLEEP_STATE[3:0], if using SLEEP > cmd. > > We are setting SLEEP_STATE field of CLKEN and HFCLKOUT to OFF mode. > > PSP version : 3.0.1.6 > > Following is the TWL4030 power scripts that we are trying to get CLKEN > signal to OFF state. This is based on rx51-peripherals.c > > ----------------------------------------------- > static struct twl4030_ins sleep_on_seq[] __initdata = { > {MSG_SINGULAR(DEV_GRP_P1, RES_CLKEN, RES_STATE_OFF), 2}, you have to sent sleep cmd to RES_HFCLKOUT also.(* attach HFCLKOUT to P3) > }; > > static struct twl4030_script sleep_on_script __initdata = { > .script = sleep_on_seq, > .size = ARRAY_SIZE(sleep_on_seq), > .flags = TWL4030_SLEEP_SCRIPT, > }; > > static struct twl4030_ins wakeup_seq[] __initdata = { > {MSG_SINGULAR(DEV_GRP_P1, RES_CLKEN, RES_STATE_ACTIVE), 2}, > }; > > static struct twl4030_script wakeup_script __initdata = { > .script = wakeup_seq, > .size = ARRAY_SIZE(wakeup_seq), > .flags = TWL4030_WAKEUP12_SCRIPT, > }; > > static struct twl4030_ins wakeup_p3_seq[] __initdata = { > {MSG_SINGULAR(DEV_GRP_P3, RES_CLKEN, RES_STATE_ACTIVE), 2}, you have to wakeup cmd to RES_HFCLKOUT also. (* attach HFCLKOUT to P3) > }; > > static struct twl4030_script wakeup_p3_script __initdata = { > .script = wakeup_p3_seq, > .size = ARRAY_SIZE(wakeup_p3_seq), > .flags = TWL4030_WAKEUP3_SCRIPT, > }; > > static struct twl4030_ins wrst_seq[] __initdata = { > /* > * Reset twl4030. > * Reset VDD1 regulator. > * Reset VDD2 regulator. > * Reset VPLL1 regulator. > * Enable sysclk output. > * Reenable twl4030. > */ > {MSG_SINGULAR(DEV_GRP_NULL, RES_RESET, RES_STATE_OFF), 2}, > {MSG_BROADCAST(DEV_GRP_NULL, RES_GRP_ALL, 0, 1, RES_STATE_ACTIVE), > 0x13}, > {MSG_BROADCAST(DEV_GRP_NULL, RES_GRP_PP, 0, 3, RES_STATE_OFF), > 0x13}, > {MSG_SINGULAR(DEV_GRP_NULL, RES_VDD1, RES_STATE_WRST), 0x13}, > {MSG_SINGULAR(DEV_GRP_NULL, RES_VDD2, RES_STATE_WRST), 0x13}, > {MSG_SINGULAR(DEV_GRP_NULL, RES_VPLL1, RES_STATE_WRST), 0x35}, > {MSG_SINGULAR(DEV_GRP_P3, RES_HFCLKOUT, RES_STATE_ACTIVE), 2}, > {MSG_SINGULAR(DEV_GRP_NULL, RES_RESET, RES_STATE_ACTIVE), 2}, > }; > > static struct twl4030_script wrst_script __initdata = { > .script = wrst_seq, > .size = ARRAY_SIZE(wrst_seq), > .flags = TWL4030_WRST_SCRIPT, > }; > > static struct twl4030_script *twl4030_scripts[] __initdata = { > /* wakeup12 script should be loaded before sleep script, otherwise a > board might hit retention before loading of wakeup script is > completed. This can cause boot failures depending on timing > issues. > */ > &wakeup_script, > &sleep_on_script, > &wakeup_p3_script, > &wrst_script, > }; > > static struct twl4030_resconfig twl4030_rconfig[] __initdata = { > { .resource = RES_CLKEN, .devgroup = DEV_GRP_P1, > .type = -1, .type2 = -1 , .remap_off = RES_STATE_OFF, .remap_sleep > = RES_STATE_OFF > }, > { .resource = RES_HFCLKOUT, .devgroup = -1, > .type = -1, .type2 = -1, .remap_off = RES_STATE_OFF, .remap_sleep > = RES_STATE_OFF > }, > > { 0, 0}, > }; > ---------------------------------------------------------- >> Part number of TPS used in our board is TPS65950 BZXNR >> You are using which code base (mainline kernel) ? We tried putting HFCLKOUT tied to P3 and put it into OFF state, but that did not work. 1. Is it necessary to put HFCLKOUT to OFF/SLEEP before switch OFF CLKEN? 2. We observe that none of RC resources can be put into sleep/off mode. Is there any dependency for this to work? 3. We are using Linux version 2.6.32 from PSP 3.0.1.6 release Regards, Lesly A M