From: Dave Gerlach <d-gerlach@ti.com> To: Gururaja Hebbar <gururaja.hebbar@ti.com> Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, Paul Walmsley <paul@pwsan.com>, Kevin Hilman <khilman@linaro.org>, Vaibhav Bedia <vaibhav.bedia@ti.com>, Santosh Shilimkar <santosh.shilimkar@ti.com> Subject: Re: [PATCHv3 5/9] ARM: OMAP2+: AM33XX: Add assembly code for PM operations Date: Mon, 19 Aug 2013 12:51:05 -0500 [thread overview] Message-ID: <52125B09.20004@ti.com> (raw) In-Reply-To: <5212159F.10302@ti.com> On 08/19/2013 07:54 AM, Gururaja Hebbar wrote: > Hi, > > On 8/6/2013 11:19 PM, Dave Gerlach wrote: >> From: Vaibhav Bedia <vaibhav.bedia@ti.com> >> >> In preparation for suspend-resume support for AM33XX, add >> the assembly file with the code which is copied to internal >> memory (OCMC RAM) during bootup and runs from there. >> >> As part of the low power entry (DeepSleep0 mode in AM33XX TRM), >> the code running from OCMC RAM does the following >> 1. Stores the EMIF configuration >> 2. Puts external memory in self-refresh >> 3. Disables EMIF clock >> 4. Executes WFI after writing to MPU_CLKCTRL register. >> > > ...snip... > ...snip... > > >> + ldr r1, [r0, #EMIF_DDR_PHY_CTRL_1] >> + str r1, emif_rd_lat_val >> + >> + /* Put SDRAM in self-refresh */ >> + ldr r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] >> + orr r1, r1, #0xa0 >> + str r1, [r0, #EMIF_POWER_MANAGEMENT_CTRL_SHDW] >> + str r1, [r0, #4] > > This seems to be a bug which I had pointed out to VB earlier. > > r0 ---> base of emif module > > r0 + 4 ---> EMIF4_0_SDRAM_STATUS ===> which is read only register > > > Above 2 lines should be as below > > + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] > + str r1, [r0, #EMIF_POWER_MANAGEMENT_CTRL_SHDW] > > > It works even with the bug because the Shadow register is updated and > that some how seems to take precedence. > > > Thanks & regards > Gururaja > Thanks for pointing this out, I have fixed it for next version. Regards, Dave > >> + >> + ldr r1, dram_sync_word @ a dummy access to DDR as per spec >> + ldr r2, [r1, #0] >
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From: d-gerlach@ti.com (Dave Gerlach) To: linux-arm-kernel@lists.infradead.org Subject: [PATCHv3 5/9] ARM: OMAP2+: AM33XX: Add assembly code for PM operations Date: Mon, 19 Aug 2013 12:51:05 -0500 [thread overview] Message-ID: <52125B09.20004@ti.com> (raw) In-Reply-To: <5212159F.10302@ti.com> On 08/19/2013 07:54 AM, Gururaja Hebbar wrote: > Hi, > > On 8/6/2013 11:19 PM, Dave Gerlach wrote: >> From: Vaibhav Bedia <vaibhav.bedia@ti.com> >> >> In preparation for suspend-resume support for AM33XX, add >> the assembly file with the code which is copied to internal >> memory (OCMC RAM) during bootup and runs from there. >> >> As part of the low power entry (DeepSleep0 mode in AM33XX TRM), >> the code running from OCMC RAM does the following >> 1. Stores the EMIF configuration >> 2. Puts external memory in self-refresh >> 3. Disables EMIF clock >> 4. Executes WFI after writing to MPU_CLKCTRL register. >> > > ...snip... > ...snip... > > >> + ldr r1, [r0, #EMIF_DDR_PHY_CTRL_1] >> + str r1, emif_rd_lat_val >> + >> + /* Put SDRAM in self-refresh */ >> + ldr r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] >> + orr r1, r1, #0xa0 >> + str r1, [r0, #EMIF_POWER_MANAGEMENT_CTRL_SHDW] >> + str r1, [r0, #4] > > This seems to be a bug which I had pointed out to VB earlier. > > r0 ---> base of emif module > > r0 + 4 ---> EMIF4_0_SDRAM_STATUS ===> which is read only register > > > Above 2 lines should be as below > > + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] > + str r1, [r0, #EMIF_POWER_MANAGEMENT_CTRL_SHDW] > > > It works even with the bug because the Shadow register is updated and > that some how seems to take precedence. > > > Thanks & regards > Gururaja > Thanks for pointing this out, I have fixed it for next version. Regards, Dave > >> + >> + ldr r1, dram_sync_word @ a dummy access to DDR as per spec >> + ldr r2, [r1, #0] >
next prev parent reply other threads:[~2013-08-19 17:51 UTC|newest] Thread overview: 212+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-08-06 17:49 [PATCHv3 0/9] ARM: OMAP2+: AM33XX: Add suspend-resume support Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-06 17:49 ` [PATCHv3 1/9] memory: emif: Move EMIF register defines to include/linux/ Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 0:48 ` Russ Dill 2013-08-08 0:48 ` Russ Dill 2013-08-08 13:35 ` Santosh Shilimkar 2013-08-08 13:35 ` Santosh Shilimkar 2013-08-12 19:32 ` Greg Kroah-Hartman 2013-08-12 19:32 ` Greg Kroah-Hartman 2013-08-12 19:33 ` Santosh Shilimkar 2013-08-12 19:33 ` Santosh Shilimkar 2013-08-06 17:49 ` [PATCHv3 2/9] ARM: OMAP2+: AM33XX: control: Add some control module registers and APIs Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 0:52 ` Russ Dill 2013-08-08 0:52 ` Russ Dill 2013-08-08 13:44 ` Santosh Shilimkar 2013-08-08 13:44 ` Santosh Shilimkar 2013-08-08 16:16 ` Dave Gerlach 2013-08-08 16:16 ` Dave Gerlach 2013-08-09 5:11 ` Tony Lindgren 2013-08-09 5:11 ` Tony Lindgren 2013-08-09 20:55 ` Dave Gerlach 2013-08-09 20:55 ` Dave Gerlach 2013-08-12 7:54 ` Tony Lindgren 2013-08-12 7:54 ` Tony Lindgren 2013-08-12 19:17 ` Kevin Hilman 2013-08-12 19:17 ` Kevin Hilman 2013-08-12 21:40 ` Dave Gerlach 2013-08-12 21:40 ` Dave Gerlach 2013-08-13 14:29 ` Kevin Hilman 2013-08-13 14:29 ` Kevin Hilman 2013-08-13 15:08 ` Santosh Shilimkar 2013-08-13 15:08 ` Santosh Shilimkar 2013-08-13 16:19 ` Kevin Hilman 2013-08-13 16:19 ` Kevin Hilman 2013-08-13 18:18 ` Santosh Shilimkar 2013-08-13 18:18 ` Santosh Shilimkar 2013-08-13 18:30 ` Russ Dill 2013-08-13 18:30 ` Russ Dill 2013-08-13 18:40 ` Santosh Shilimkar 2013-08-13 18:40 ` Santosh Shilimkar 2013-08-13 19:11 ` Kevin Hilman 2013-08-13 19:11 ` Kevin Hilman 2013-08-14 17:27 ` Suman Anna 2013-08-14 17:27 ` Suman Anna 2013-08-14 19:16 ` Russ Dill 2013-08-14 19:16 ` Russ Dill 2013-08-20 23:39 ` Paul Walmsley 2013-08-20 23:39 ` Paul Walmsley 2013-08-21 17:32 ` Suman Anna 2013-08-21 17:32 ` Suman Anna 2013-08-06 17:49 ` [PATCHv3 3/9] ARM: OMAP: DTB: Update IRQ data for WKUP_M3 Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 0:53 ` Russ Dill 2013-08-08 0:53 ` Russ Dill 2013-08-08 13:46 ` Santosh Shilimkar 2013-08-08 13:46 ` Santosh Shilimkar 2013-08-06 17:49 ` [PATCHv3 4/9] ARM: OMAP2+: AM33XX: Reserve memory to comply with EMIF spec Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 2:30 ` Russ Dill 2013-08-08 2:30 ` Russ Dill 2013-08-08 14:19 ` Santosh Shilimkar 2013-08-08 14:19 ` Santosh Shilimkar 2013-08-08 18:16 ` Kevin Hilman 2013-08-08 18:16 ` Kevin Hilman 2013-08-08 19:31 ` Santosh Shilimkar 2013-08-08 19:31 ` Santosh Shilimkar 2013-08-08 20:05 ` Kevin Hilman 2013-08-08 20:05 ` Kevin Hilman 2013-08-08 20:11 ` Santosh Shilimkar 2013-08-08 20:11 ` Santosh Shilimkar 2013-08-09 15:11 ` Kevin Hilman 2013-08-09 15:11 ` Kevin Hilman 2013-08-09 16:25 ` Dave Gerlach 2013-08-09 16:25 ` Dave Gerlach 2013-08-06 17:49 ` [PATCHv3 5/9] ARM: OMAP2+: AM33XX: Add assembly code for PM operations Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 7:02 ` Russ Dill 2013-08-08 7:02 ` Russ Dill 2013-08-08 14:50 ` Santosh Shilimkar 2013-08-08 14:50 ` Santosh Shilimkar 2013-08-08 15:16 ` Russ Dill 2013-08-08 15:16 ` Russ Dill 2013-08-08 15:22 ` Santosh Shilimkar 2013-08-08 15:22 ` Santosh Shilimkar 2013-08-08 16:03 ` Russ Dill 2013-08-08 16:03 ` Russ Dill 2013-08-19 12:54 ` Gururaja Hebbar 2013-08-19 12:54 ` Gururaja Hebbar 2013-08-19 17:51 ` Dave Gerlach [this message] 2013-08-19 17:51 ` Dave Gerlach 2013-08-06 17:49 ` [PATCHv3 6/9] ARM: OMAP2+: timer: Add suspend-resume callbacks for clkevent device Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 7:03 ` Russ Dill 2013-08-08 7:03 ` Russ Dill 2013-08-08 14:23 ` Santosh Shilimkar 2013-08-08 14:23 ` Santosh Shilimkar 2013-08-08 16:09 ` Dave Gerlach 2013-08-08 16:09 ` Dave Gerlach 2013-08-08 18:25 ` Kevin Hilman 2013-08-08 18:25 ` Kevin Hilman 2013-08-08 19:49 ` Dave Gerlach 2013-08-08 19:49 ` Dave Gerlach 2013-08-06 17:49 ` [PATCHv3 7/9] ARM: OMAP: omap_device: Add APIs to enable and idle hwmods Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 7:05 ` Russ Dill 2013-08-08 7:05 ` Russ Dill 2013-08-08 14:26 ` Santosh Shilimkar 2013-08-08 14:26 ` Santosh Shilimkar 2013-08-06 17:49 ` [PATCHv3 8/9] ARM: OMAP2+: AM33XX: Basic suspend resume support Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-07 16:22 ` Nishanth Menon 2013-08-07 16:22 ` Nishanth Menon 2013-08-07 18:12 ` Dave Gerlach 2013-08-07 18:12 ` Dave Gerlach 2013-08-07 19:16 ` Nishanth Menon 2013-08-07 19:16 ` Nishanth Menon 2013-08-08 8:45 ` Russ Dill 2013-08-08 8:45 ` Russ Dill 2013-08-08 12:26 ` Nishanth Menon 2013-08-08 12:26 ` Nishanth Menon 2013-08-08 15:03 ` Santosh Shilimkar 2013-08-08 15:03 ` Santosh Shilimkar 2013-08-08 16:06 ` Dave Gerlach 2013-08-08 16:06 ` Dave Gerlach 2013-08-08 16:22 ` Nishanth Menon 2013-08-08 16:22 ` Nishanth Menon 2013-08-08 21:14 ` Kevin Hilman 2013-08-08 21:14 ` Kevin Hilman 2013-08-08 21:32 ` Nishanth Menon 2013-08-08 21:32 ` Nishanth Menon 2013-08-08 23:04 ` Kevin Hilman 2013-08-08 23:04 ` Kevin Hilman 2013-08-09 15:11 ` Nishanth Menon 2013-08-09 15:11 ` Nishanth Menon 2013-08-09 16:12 ` Kevin Hilman 2013-08-09 16:12 ` Kevin Hilman 2013-08-09 16:36 ` Nishanth Menon 2013-08-09 16:36 ` Nishanth Menon 2013-08-09 20:34 ` Kevin Hilman 2013-08-09 20:34 ` Kevin Hilman 2013-08-09 21:35 ` Nishanth Menon 2013-08-09 21:35 ` Nishanth Menon 2013-08-09 22:28 ` Russ Dill 2013-08-09 22:28 ` Russ Dill 2013-08-12 16:09 ` Kevin Hilman 2013-08-12 16:09 ` Kevin Hilman 2013-08-30 17:29 ` Vaibhav Bedia 2013-08-30 17:29 ` Vaibhav Bedia 2013-08-20 22:48 ` Paul Walmsley 2013-08-20 22:48 ` Paul Walmsley 2013-08-23 14:56 ` Dave Gerlach 2013-08-23 14:56 ` Dave Gerlach 2013-08-13 7:43 ` Russ Dill 2013-08-13 7:43 ` Russ Dill 2013-08-13 14:59 ` Kevin Hilman 2013-08-13 14:59 ` Kevin Hilman 2013-08-27 21:45 ` Kevin Hilman 2013-08-27 21:45 ` Kevin Hilman 2013-08-29 21:41 ` Dave Gerlach 2013-08-29 21:41 ` Dave Gerlach 2013-08-29 22:02 ` Kevin Hilman 2013-08-29 22:02 ` Kevin Hilman 2013-08-30 17:39 ` Vaibhav Bedia 2013-08-30 17:39 ` Vaibhav Bedia 2013-08-30 21:18 ` Kevin Hilman 2013-08-30 21:18 ` Kevin Hilman 2013-08-06 17:49 ` [PATCHv3 9/9] ARM: OMAP2+: AM33XX: Hookup AM33XX PM code into OMAP builds Dave Gerlach 2013-08-06 17:49 ` Dave Gerlach 2013-08-08 8:47 ` Russ Dill 2013-08-08 8:47 ` Russ Dill 2013-08-08 14:53 ` Santosh Shilimkar 2013-08-08 14:53 ` Santosh Shilimkar 2013-08-08 13:31 ` [PATCHv3 0/9] ARM: OMAP2+: AM33XX: Add suspend-resume support Santosh Shilimkar 2013-08-08 13:31 ` Santosh Shilimkar 2013-08-11 11:53 ` Daniel Mack 2013-08-11 11:53 ` Daniel Mack 2013-08-12 18:59 ` Dave Gerlach 2013-08-12 18:59 ` Dave Gerlach 2013-08-13 12:39 ` Daniel Mack 2013-08-13 12:39 ` Daniel Mack 2013-08-13 15:33 ` Dave Gerlach 2013-08-13 15:33 ` Dave Gerlach 2013-08-13 15:51 ` Daniel Mack 2013-08-13 15:51 ` Daniel Mack 2013-08-19 9:23 ` Gururaja Hebbar 2013-08-19 9:23 ` Gururaja Hebbar 2013-08-19 17:47 ` Dave Gerlach 2013-08-19 17:47 ` Dave Gerlach 2013-08-27 20:23 ` Kevin Hilman 2013-08-27 20:23 ` Kevin Hilman 2013-08-29 21:30 ` Dave Gerlach 2013-08-29 21:30 ` Dave Gerlach 2013-08-29 21:52 ` Kevin Hilman 2013-08-29 21:52 ` Kevin Hilman 2013-08-29 22:20 ` Dave Gerlach 2013-08-29 22:20 ` Dave Gerlach 2013-08-29 22:20 ` Kevin Hilman 2013-08-29 22:20 ` Kevin Hilman 2013-08-29 22:43 ` Russ Dill 2013-08-29 22:43 ` Russ Dill 2013-08-29 23:02 ` Kevin Hilman 2013-08-29 23:02 ` Kevin Hilman 2013-09-03 17:24 ` Dave Gerlach 2013-09-03 17:24 ` Dave Gerlach 2013-09-04 15:01 ` Kevin Hilman 2013-09-04 15:01 ` Kevin Hilman 2013-09-04 15:12 ` Russ Dill 2013-09-04 15:12 ` Russ Dill 2013-09-04 15:18 ` Kevin Hilman 2013-09-04 15:18 ` Kevin Hilman
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