From: Ivan Grokhotkov <ivan@espressif.com>
Date: Wed, 26 Jul 2017 05:51:37 +0000 (+0800)
Subject: Merge branch 'feature/sdspi_driver' into 'master'
X-Git-Tag: v3.1-dev~441
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=002f38fa8f9db8ec194f142bd0270408b43e1507;p=esp-idf

Merge branch 'feature/sdspi_driver' into 'master'

SD SPI mode driver

This MR adds functionality to support SD cards connected via SPI interface.
Additionally, two bugs are fixed:
- Definition of `SPI_TRANS_MODE_DIOQIO_ADDR` in spi_master driver
- SD card probing frequency was 4000kHz instead of 400kHz as required by the standard

See merge request !727
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002f38fa8f9db8ec194f142bd0270408b43e1507