sdhci: Advertise 2.0v supply on SDIO host controller
authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Thu, 11 Jan 2018 13:51:58 +0000 (15:51 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 13 Apr 2018 17:48:31 +0000 (19:48 +0200)
commit905348d08acd1d35d270f49090c3ac1d2c4bc374
tree23e3b364c4ef00723525cc5680f9219f5aaeae18
parentd774913ba20e86338aedda6fee84351739dc100d
sdhci: Advertise 2.0v supply on SDIO host controller

[ Upstream commit 2a609abe71ca59e4bd7139e161eaca2144ae6f2e ]

On Intel Edison the Broadcom Wi-Fi card, which is connected to SDIO,
requires 2.0v, while the host, according to Intel Merrifield TRM,
supports 1.8v supply only.

The card announces itself as

  mmc2: new ultra high speed DDR50 SDIO card at address 0001

Introduce a custom OCR mask for SDIO host controller on Intel Merrifield
and add a special case to sdhci_set_power_noreg() to override 2.0v supply
by enforcing 1.8v power choice.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/host/sdhci-pci-core.c
drivers/mmc/host/sdhci.c