996bb4c5dc
SDCC4 controller has IO_PAD_PWR_SWITCH control bit in MCI_CLK register. Driver should set this bit to 1 if the IO voltage level is within low voltage range (1.7v - 1.9v) else clear it. But driver sets this bit to 1 only if the MMC core layer initiates the voltage switch sequence. So if voltage switch sequence is not initiated (which is the case with non UHS-I cards) then even if the IO voltage level is within low voltage range, IO_PAD_PWR_SWITCH bit remains cleared. This change checks the IO voltage level and based on that sets the IO_PAD_PWR_SWITCH bit. CRs-Fixed: 386445 Change-Id: Id0648b0f87ea9bcc942e855e30da810e0fe5ebf5 Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> (cherry picked from commit 341b9e7dbaf0a3caf6e41d37486e3bccc9795feb)