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Message-ID: <CAKpemQLyieDP1r11v1WJ+-SXeseUiPKsCK6SBf-FSCOxGkEWHw@mail.gmail.com>
Date: Fri, 24 Nov 2023 06:58:31 +0200
From: Bret Joseph <bretjoseph@...il.com>
To: Chen-Yu Tsai <wenst@...omium.org>
Cc: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Mark Brown <broonie@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
LKML <linux-kernel@...r.kernel.org>,
Zhiyong Tao <zhiyong.tao@...iatek.com>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v3 3/3] regulator: mt6358: Add output voltage fine tuning
to variable LDOs
ok if thats the case it means I will have to customize things on my end.
On Fri, 24 Nov 2023 at 06:29, Chen-Yu Tsai <wenst@...omium.org> wrote:
>
> Please keep the whole CC list. Please don't top post.
>
> On Thu, Nov 23, 2023 at 7:27 PM Bret Joseph <bretjoseph@...il.com> wrote:
> >
> > /sys/kernel/debug/regmap/1000d000.pwrap/registers
> > 1e00: 2808
> > 1e02: 2808
> > 1e04: 2000
> > 1e06: 2000
> > 1e08: 2808
>
> According to the datasheet I have, x8xx is not a valid voltage setting.
> It wasn't valid before my patch either.
>
> This is vcama1.
>
> > 1e0a: 2808
> > 1e0c: 2000
> > 1e0e: 2000
> > 1e10: 0000 # I have deleted everything with 0000
> > 1e20: 2808
> > 1e22: 2808
> > 1e24: 2000
> > 1e26: 2000
> > 1e28: 2808
>
> x8xx is not valid here either. This is vcn33.
>
> > 1e2a: 2808
> > 1e2c: 2000
>
> x0xx is not valid here either. This is vsim1.
>
> > 1e2e: 2000
>
> x0xx for register 0x1e30 is not valid. This is vsim2.
> x0xx for register 0x1e38 is not valid. This is vemc.
> x0xx for register 0x1e3c is not valid. This is vldo28.
> x0xx for register 0x1e48 is not valid. This is vmch.
> x0xx for register 0x1e4c is not valid. This is vmc.
>
> > 1e80: 2808
> > 1e82: 2808
> > 1e84: 2000
> > 1e86: 2000
> > 1e88: 2808
> > 1e8a: 2808
> > 1e8c: 2000
> > 1e8e: 2000
>
> x0xx for register 0x1e98 is not valid. This is vefuse.
>
> > 1ea0: 2808
> > 1ea2: 2808
> > 1ea4: 2000
> > 1ea6: 2000
> > 1ea8: 2808
> > 1eaa: 2808
> > 1eac: 2000
> > 1eae: 2000
>
> x0xx for register 0x1eae is not valid. This is vcamd.
>
> So basically all the failures you see are due to (as far as the datasheet
> says) invalid values. The driver prior to my patch would error out as well.
>
> Either the register readback is faulty on your platform, or your bootloader
> has configured the system into a weird state.
>
>
> ChenYu
>
> > /sys/kernel/debug/regulator/regulator_summary
> > regulator use open bypass opmode voltage
> > current min max
> > ---------------------------------------------------------------------------------------
> > regulator-dummy 3 35 0 unknown 0mV 0mA 0mV 0mV
> > vdram1 0 0 0 normal 500mV 0mA
> > 500mV 2087mV
> > vcore 0 0 0 normal 500mV 0mA
> > 500mV 1293mV
> > vpa 0 0 0 normal 500mV
> > 0mA 500mV 3650mV
> > vproc11 0 0 0 normal 500mV 0mA
> > 500mV 1293mV
> > vproc12 0 0 0 normal 500mV 0mA
> > 500mV 1293mV
> > vgpu 0 0 0 normal 500mV 0mA
> > 500mV 1293mV
> > vs2 0 0 0 normal 500mV
> > 0mA 500mV 2087mV
> > vmodem 0 0 0 normal 500mV 0mA
> > 500mV 1293mV
> > vs1 2 5 0 normal 1000mV
> > 0mA 1000mV 2587mV
> > vio18 1 0 0 unknown 1800mV 0mA
> > 1800mV 1800mV
> > vcamio 0 0 0 unknown 1800mV 0mA
> > 1800mV 1800mV
> > vcn18 0 0 0 unknown 1800mV 0mA
> > 1800mV 1800mV
> > vefuse 0 0 0 unknown 1700mV 0mA
> > 1700mV 1900mV
> > vrf18 0 0 0 unknown 1800mV
> > 0mA 1800mV 1800mV
> > vdram2 0 0 0 unknown 600mV 0mA
> > 600mV 1800mV
> > vsim1 0 0 0 unknown 1700mV 0mA
> > 1700mV 3100mV
> > vibr 0 0 0 unknown 1200mV
> > 0mA 1200mV 3300mV
> > vrf12 0 0 0 unknown 1200mV
> > 0mA 1200mV 1200mV
> > vusb 0 0 0 unknown 3000mV
> > 0mA 3000mV 3100mV
> > vcamd 0 0 0 unknown 900mV 0mA
> > 900mV 1800mV
> > vfe28 0 0 0 unknown 2800mV
> > 0mA 2800mV 2800mV
> > vsram_proc11 0 0 0 unknown 500mV 0mA 500mV 1293mV
> > vcn28 0 0 0 unknown 2800mV 0mA
> > 2800mV 2800mV
> > vsram_others 0 0 0 unknown 500mV 0mA
> > 500mV 1293mV
> > vsram_gpu 0 0 0 unknown 500mV 0mA
> > 500mV 1293mV
> > vxo22 0 0 0 unknown 2200mV 0mA
> > 2200mV 2200mV
> > vaux18 0 0 0 unknown 1800mV 0mA
> > 1800mV 1800mV
> > vmch 0 0 0 unknown 2900mV 0mA
> > 2900mV 3300mV
> > vbif28 0 0 0 unknown 2800mV
> > 0mA 2800mV 2800mV
> > vsram_proc12 0 0 0 unknown 550mV 0mA 500mV 1293mV
> > vcama1 0 0 0 unknown 1800mV 0mA
> > 1800mV 3000mV
> > vemc 0 0 0 unknown 2900mV 0mA
> > 2900mV 3300mV
> > vio28 1 0 0 unknown 2800mV
> > 0mA 2800mV 2800mV
> > va12 0 0 0 unknown 1200mV
> > 0mA 1200mV 1200mV
> > VCN33 0 0 0 unknown 3300mV 0mA
> > 0mV 0mV
> > vcama2 0 0 0 unknown 1800mV 0mA
> > 1800mV 3000mV
> > vmc 0 0 0 unknown 1800mV
> > 0mA 1800mV 3300mV
> > vldo28 0 0 0 unknown 2800mV 0mA
> > 2800mV 3000mV
> > vaud28 0 0 0 unknown 2800mV 0mA
> > 2800mV 2800mV
> > vsim2 0 0 0 unknown 1700mV 0mA
> > 1700mV 3100mV
> >
> > I have also seen errors when consumers use regulators which I think
> > could be related to setting values on regulators
> > Here is an example using mtk-ccifreq driver
> > [ 0.668869] mtk-ccifreq cci: no pinctrl handle
> > [ 0.669128] device: 'regulator:regulator.5--platform:cci': device_add
> > [ 0.669278] devices_kset: Moving cci to end of list
> > [ 0.669311] PM: Moving platform:cci to end of list
> > [ 0.669340] mtk-ccifreq cci: Linked as a consumer to regulator.5
> > [ 0.669713] of: _opp_add_static_v2: turbo:0 rate:500000000 uv:600000
> > uvmin:600000 uvmax:600000 latency:0 level:0
> > [ 0.669969] of: _opp_add_static_v2: turbo:0 rate:560000000 uv:675000
> > uvmin:675000 uvmax:675000 latency:0 level:0
> > [ 0.670245] of: _opp_add_static_v2: turbo:0 rate:612000000 uv:693750
> > uvmin:693750 uvmax:693750 latency:0 level:0
> > [ 0.670512] of: _opp_add_static_v2: turbo:0 rate:682000000 uv:718750
> > uvmin:718750 uvmax:718750 latency:0 level:0
> > [ 0.670763] of: _opp_add_static_v2: turbo:0 rate:752000000 uv:743750
> > uvmin:743750 uvmax:743750 latency:0 level:0
> > [ 0.671031] of: _opp_add_static_v2: turbo:0 rate:822000000 uv:768750
> > uvmin:768750 uvmax:768750 latency:0 level:0
> > [ 0.671598] of: _opp_add_static_v2: turbo:0 rate:875000000 uv:781250
> > uvmin:781250 uvmax:781250 latency:0 level:0
> > [ 0.671921] of: _opp_add_static_v2: turbo:0 rate:927000000 uv:800000
> > uvmin:800000 uvmax:800000 latency:0 level:0
> > [ 0.672178] of: _opp_add_static_v2: turbo:0 rate:980000000 uv:818750
> > uvmin:818750 uvmax:818750 latency:0 level:0
> > [ 0.672434] of: _opp_add_static_v2: turbo:0 rate:1050000000 uv:843750
> > uvmin:843750 uvmax:843750 latency:0 level:0
> > [ 0.672681] of: _opp_add_static_v2: turbo:0 rate:1120000000 uv:862500
> > uvmin:862500 uvmax:862500 latency:0 level:0
> > [ 0.672945] of: _opp_add_static_v2: turbo:0 rate:1155000000 uv:887500
> > uvmin:887500 uvmax:887500 latency:0 level:0
> > [ 0.673200] of: _opp_add_static_v2: turbo:0 rate:1190000000 uv:906250
> > uvmin:906250 uvmax:906250 latency:0 level:0
> > [ 0.673465] of: _opp_add_static_v2: turbo:0 rate:1260000000 uv:950000
> > uvmin:950000 uvmax:950000 latency:0 level:0
> > [ 0.673720] of: _opp_add_static_v2: turbo:0 rate:1330000000 uv:993750
> > uvmin:993750 uvmax:993750 latency:0 level:0
> > [ 0.673988] of: _opp_add_static_v2: turbo:0 rate:1400000000 uv:1031250
> > uvmin:1031250 uvmax:1031250 latency:0 level:0
> > [ 0.674327] device: 'cci': device_add
> > [ 0.674499] PM: Adding info for No Bus:cci
> > [ 0.674643] mtk-ccifreq cci: error -EPROBE_DEFER: devfreq_add_device:
> > Unable to start governor for the device
> > [ 0.675571] device: 'cci': device_unregister
> > [ 0.675730] PM: Removing info for No Bus:cci
> > [ 0.675862] mtk-ccifreq cci: failed to add devfreq device: -517
> > [ 0.680084] mtk-ccifreq cci: Driver mtk-ccifreq requests probe deferral
> > [ 0.680148] ------------[ cut here ]------------
> > [ 0.680163] WARNING: CPU: 6 PID: 56 at _regulator_put+0x340/0x354
> > [ 0.680190] Modules linked in:
> > [ 0.680208] CPU: 6 PID: 56 Comm: kworker/u16:1 Tainted: G W
> > 6.7.0-rc1-next-20231115-g2b600507077d-dirty #34
> > [ 0.680232] Hardware name: MT6769H (DT)
> > [ 0.680246] Workqueue: events_unbound deferred_probe_work_func
> > [ 0.680268] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> > [ 0.680285] pc : _regulator_put+0x340/0x354
> > [ 0.680302] lr : regulator_put+0x58/0x8c
> > [ 0.680317] sp : ffffffc080483950
> > [ 0.680328] x29: ffffffc080483950 x28: ffffff80c0030000 x27: ffffffdd002037f0
> > [ 0.680353] x26: ffffffdd01747650 x25: ffffff80c0f5d0c0 x24: ffffffdd00180d80
> > [ 0.680376] x23: ffffffc080483a98 x22: ffffffdd01f46d50 x21: ffffff80c0f5d780
> > [ 0.680400] x20: ffffffdd01ee2bc0 x19: ffffff80c0f5d780 x18: ffffff80c1f8c660
> > [ 0.680423] x17: 000000040044ffff x16: 005000f4b5593519 x15: ffffffdd0221fdb0
> > [ 0.680446] x14: 0000000000000891 x13: 0000000000000891 x12: 0000000000000001
> > [ 0.680468] x11: 0000000000000891 x10: 000000000001cde2 x9 : 0000000000001464
> > [ 0.680491] x8 : 000000008020001f x7 : ffffff80c249e600 x6 : 000000000000018d
> > [ 0.680513] x5 : 00000000000091ec x4 : 00000000000091d3 x3 : ffffffdd01a5e070
> > [ 0.680535] x2 : 0000000000000001 x1 : ffffffdd01ee2b60 x0 : 0000000000000002
> > [ 0.680558] Call trace:
> > [ 0.680568] _regulator_put+0x340/0x354
> > [ 0.680583] regulator_put+0x58/0x8c
> > [ 0.680597] devm_regulator_release+0x30/0x4c
> > [ 0.680613] release_nodes+0x8c/0xdc
> > [ 0.680629] devres_release_all+0xc0/0x164
> > [ 0.680646] device_unbind_cleanup+0x34/0xe4
> > [ 0.680660] really_probe+0x200/0x75c
> > [ 0.680674] __driver_probe_device+0x100/0x2e4
> > [ 0.680688] driver_probe_device+0x6c/0x1d4
> > [ 0.680703] __device_attach_driver+0x170/0x238
> > [ 0.680717] bus_for_each_drv+0xbc/0x18c
> > [ 0.680734] __device_attach+0x124/0x2ec
> > [ 0.680748] device_initial_probe+0x30/0x4c
> > [ 0.680762] bus_probe_device+0x138/0x168
> > [ 0.680775] deferred_probe_work_func+0x134/0x1fc
> > [ 0.680790] process_scheduled_works+0x26c/0x73c
> > [ 0.680808] worker_thread+0x294/0x690
> > [ 0.680823] kthread+0x1fc/0x22c
> > [ 0.680837] ret_from_fork+0x10/0x20
> > [ 0.680853] ---[ end trace 0000000000000000 ]---
> > [ 0.680923] mtk-ccifreq cci: Dropping the link to regulator.5
> > [ 0.680941] device: 'regulator:regulator.5--platform:cci': device_unregister
> > [ 0.681041] platform cci: Added to deferred list
> >
> > On Thu, 23 Nov 2023 at 08:25, Chen-Yu Tsai <wenst@...omium.org> wrote:
> > >
> > > Hi Bret,
> > >
> > > On Thu, Nov 16, 2023 at 12:52 AM Bret Joseph <bretjoseph@...il.com> wrote:
> > > >
> > > > In mt6358-regulator.c
> > > >
> > > > static const struct regulator_ops mt6358_volt_table_ops = {
> > > > .list_voltage = regulator_list_voltage_pickable_linear_range,
> > > > .map_voltage = regulator_map_voltage_pickable_linear_range,
> > > > .set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
> > > > .get_voltage_sel = mt6358_get_buck_voltage_sel /*regulator_get_voltage_sel_pickable_regmap*/,
> > > > .set_voltage_time_sel = regulator_set_voltage_time_sel,
> > > > .enable = regulator_enable_regmap,
> > > > .disable = regulator_disable_regmap,
> > > > .is_enabled = regulator_is_enabled_regmap,
> > > > .get_status = mt6358_get_status,
> > > > };
> > > >
> > > > the function [regulator_get_voltage_sel_pickable_regmap] causes a -EINVAL when registering
> > > >
> > > > vsim1 vusb vcamd vefuse vmch vcama1 vemc vmc vldo28 vsim2
> > > >
> > > > using [mt6358_get_buck_voltage_sel] results in a successful probe
> > >
> > > Sure it will probe, but any values you read back will be bogus.
> > >
> > > Can you provide a dump of /sys/kernel/debug/regulator/regulator_summary
> > > and `grep ^1e..: /sys/kernel/debug/regmap/1000d000.pwrap/registers`,
> > > and also any relevant logs?
> > >
> > > ChenYu
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