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.
Help me understand this. When you eject the SD card, does the CPLD logic detect the SDHC_CS_B and change the signal routing? Are you trying to fix the signal routing by forcing the mode?
Signed-off-by: Yangbo Lu yangbo.lu@nxp.com
board/freescale/ls1088a/ls1088a.c | 18 ++++++++++++++++++ board/freescale/ls1088a/ls1088a_qixis.h | 6 ++++++ include/configs/ls1088ardb.h | 2 ++ 3 files changed, 26 insertions(+)
diff --git a/board/freescale/ls1088a/ls1088a.c b/board/freescale/ls1088a/ls1088a.c index 96d9ae7f1d..60f40edb5a 100644 --- a/board/freescale/ls1088a/ls1088a.c +++ b/board/freescale/ls1088a/ls1088a.c @@ -18,6 +18,7 @@ #include <environment.h> #include <asm/arch-fsl-layerscape/soc.h> #include <asm/arch/ppa.h> +#include <hwconfig.h>
#include "../common/qixis.h" #include "ls1088a_qixis.h" @@ -296,6 +297,23 @@ void board_retimer_init(void) select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT); }
+#ifdef CONFIG_MISC_INIT_R +int misc_init_r(void) +{ +#ifdef CONFIG_TARGET_LS1088ARDB
- u8 brdcfg5;
- if (hwconfig("esdhc-force-sd")) {
brdcfg5 = QIXIS_READ(brdcfg[5]);brdcfg5 &= ~BRDCFG5_SPISDHC_MASK;brdcfg5 |= BRDCFG5_FORCE_SD;QIXIS_WRITE(brdcfg[5], brdcfg5);- }
+#endif
Would it be appropriate to check if eMMC is used before taking the forced value?
York