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: Fri, 21 Jan 2011 23:20:23 +0530 Message-ID: <001501cbb993$b25c0fe0$17142fa0$@com> References: <005301cbb947$6d682730$48387590$@com> <23149.10.24.255.17.1295604867.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]:39793 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754285Ab1AURuY (ORCPT ); Fri, 21 Jan 2011 12:50:24 -0500 Received: by mail-fx0-f46.google.com with SMTP id 20so2022168fxm.19 for ; Fri, 21 Jan 2011 09:50:23 -0800 (PST) In-Reply-To: <23149.10.24.255.17.1295604867.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 Please see responses inline below. 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}, }; 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}, }; 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}, }; ---------------------------------------------------------- Please let me know your comments. Regards, Lesly A M > > Part number of TPS used in our board is TPS65950 BZXNR > > with regards, > - Nagendra. >