Hello, With the TWL6030 PMIC, during reset the VMMC regulator doesn't reach 0V and only drops to 1.8V, furthermore the pulse width is under 200us whereas the SD specification expect 1ms. Fortunately, the WR_S bit allows the TWL6030 to no reset at all the VMMC during warm reset and keep the current voltage. Thanks to this workaround the SD card doesn't reach a undefined reset stage. The first patch describes the new property needed for this "feature". The second one is just a small cleanup done while I wrote the last patch, but as it was not really related to the feature itself, I made a separate patch for it. The last patch adds the feature in the driver. Gregory Gregory CLEMENT (3): dt-bindings: regulator: twl6030: Add retain-on-reset property regulator: twl6030: use variable for device node regulator: twl6030: workaround the VMMC reset behavior .../bindings/regulator/twl-regulator.txt | 7 +++++++ drivers/regulator/twl6030-regulator.c | 21 +++++++++++++++---- 2 files changed, 24 insertions(+), 4 deletions(-) -- 2.20.1
