Document the use of l7, l10 and l15 in the High Speed Qualcomm USB2 PHY, in order to keep the regulators voted on when USB is active. Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20221222203636.250190-3-marijn.suijten@somainline.org