[U-Boot] [PATCH] dwc_ahsata: return failure for MX6 if not IMX6Q

[Tim Harvey]

The IMX6QUAD/DUAL have SATA, but the IMX6SOLO/DL do not. Return an error
indicating no such port instead of attempting a memory access that results
in a data abort and reset. This dynamic detection is necessary for bootloaders
that support multiple variants of the IMX6 SoC.

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
 drivers/block/dwc_ahsata.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
index 3569214..638a585 100644
--- a/drivers/block/dwc_ahsata.c
+++ b/drivers/block/dwc_ahsata.c
@@ -17,6 +17,7 @@
 #include <asm/io.h>
 #include <linux/bitops.h>
 #include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
 #include "dwc_ahsata.h"
 
 struct sata_port_regs {
@@ -558,6 +559,12 @@ int init_sata(int dev)
 	u32 linkmap;
 	struct ahci_probe_ent *probe_ent = NULL;
 
+#if defined(CONFIG_MX6)
+	if (!is_cpu_type(MXC_CPU_MX6Q)) {
+		printf("No device detected!\n");
+		return 1;
+	}
+#endif
 	if (dev < 0 || dev > (CONFIG_SYS_SATA_MAX_DEVICE - 1)) {
 		printf("The sata index %d is out of ranges\n\r", dev);
 		return -1;
-- 
1.8.3.2