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| geertu | somlo: The actual voltage will depend on the board (e.g. 1.8V-only eMMC), so DT is the right place. | 07:21 |
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| somlo | geertu: huh, ok then -- v13 coming out later today, with REGULATOR and DT voltage config support :) | 12:35 |
| somlo | I'll send another update to litex_json2dts_linux, too | 12:36 |
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| shorne | somlo: there are hardly andy drivers depending on REGULATOR_FIXED_VOLTAGE, interesting | 14:07 |
| geertu | shorne: That's why everybody has CONFIG_REGULATOR_FIXED_VOLTAGE=y in his defconfig file? | 14:12 |
| geertu | some platforms do select REGULATOR_FIXED_VOLTAGE (if REGULATOR) | 14:12 |
| shorne | I guess so, we could also 'select REGULATOR_FIXED_VOLTAGE' insteaed of depends | 14:13 |
| shorne | I am just looking at some drivers that use regulators/power-supplies | 14:14 |
| cr1901 | shorne: Not related to anything, but congrats on getting openrisc merged into glibc | 14:14 |
| geertu | yes, and better than using depends, as that might create a circular dependency | 14:14 |
| geertu | cr1901: +1 | 14:14 |
| shorne | drivers/gpu/drm/panel/panel-sitronix-st7789v.c: ctx->power = devm_regulator_get(&spi->dev, "power"); | 14:15 |
| geertu | cr1901: 7-8 years after I last played with OpenRISC on a de0-nano (before FLOSS FPGA toolchains emerged) | 14:16 |
| shorne | cr1901: thanks, doing that work has made the whole toolchain improve. Now I can get back to hardware projects :) | 14:16 |
| cr1901 | The more CPUs we have, the merrier | 14:16 |
| shorne | geertu: it probably took me 3 years to get the glibc port upstreamed :) | 14:16 |
| cr1901 | (Which reminds me, at some point soon, need to add Cora to LiteX) | 14:17 |
| shorne | just looking more, almost all mmc host dirvers use: mmc_regulator_get_supply, but nothing about dependencies in Kconfig that I see | 14:24 |
| geertu | shorne: So mmc_regulator_get_supply() would return -EPROBE_DEFER? Or device links even prevents getting that far? | 14:25 |
| shorne | maybe an oversight? I see select REGULATOR_FIXED_VOLTAGE if REGULATOR in some arch/*/Kconfig too | 14:26 |
| shorne | it looks like its returning -EPROBE_DEFER to me. | 14:27 |
| shorne | we could test when driver v13 comes out | 14:27 |
| shorne | but, device links only would fail if the dependency is specified. If you lave out the regulator from dts it will not defer calling probe. | 14:28 |
| geertu | shorne: true | 14:34 |
| shorne | this is the only commit I find: 26c2b19e9daf ("mmc: mtk-sd: select REGULATOR") | 14:34 |
| shorne | thats related to mmc and regulators config | 14:35 |
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| a3f | geertu: Great! Should import them back into barebox now ^^ | 16:13 |
| somlo | geertu, shorne: my plan is to "ret = mmc_regulator_get_supply(mmc); if (ret || mmc->ocr_avail == 0) mmc->ocr_avail = MMC_VOD_32_33 | MMC_VOD_33_34;" | 16:19 |
| somlo | i.e., fall back to 3.3V if anything at all smells wrong | 16:20 |
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| somlo | we can definitely "select CONFIG_REGULATOR_FIXED_VOLTAGE" in Kconfig as well | 16:20 |
| somlo | I think most of the other existing drivers using mmc_regulator_get_supply() simply blindly assume CONFIG_REGULATOR_* is enabled, tbh | 16:21 |
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| shorne | somlo: if we do anything I think "select REGULATOR" would be it. But I am fine with leaving it out as we have the fallback | 20:56 |
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| shorne | cavium.c does something similar: | 20:59 |
| shorne | if (IS_ERR(mmc->supply.vmmc)) | 20:59 |
| shorne | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | 20:59 |
| shorne | so does drivers/mmc/host/dw_mmc.c, drivers/mmc/host/mxcmmc.c | 21:04 |
| shorne | All others seem to use one or the other | 21:04 |
| shorne | git grep -C4 'mmc_regulator_get_supply\|ocr_avail.*VDD' -- drivers/mmc/ | 21:08 |
| shorne | to see the details | 21:08 |
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