19 Dec
2017
19 Dec
'17
5:01 p.m.
On 11/26/2017 11:59 PM, Yangbo Lu wrote:
The BRDCFG5[SPISDHC] register field of Qixis device is used to control SPI and SDHC signal routing.
10 = Force SDHC Mode
- SPI_CS[0] is routed to CPLD for SDHC_VS use.
- SPI_CS[1] is unused.
- SPI_CS[2:3] are routed to the TDMRiser slot.
11 = Force eMMC Mode
- SPI_CS[0:3] are routed to the eMMC card.
0X = Auto Mode
- If SDHC_CS_B=0 (SDHC card installed): Use SDHC mode described above.
- Else SDHC_CS_B=1 (no SDHC card installed): Use eMMC mode described above.
In default the hardware uses auto mode, but sometimes we need to use force SDHC mode to support SD card hotplug, or SD sleep waking up in kernel. This patch is to support force SDHC mode by hwconfig.
Signed-off-by: Yangbo Lu yangbo.lu@nxp.com
Applied to fsl-qoriq master. Thanks.
York