add AHCI driver patch

conf/machine/boards/elphel393/elphel393.dts

@@ -448,6 +448,14 @@
 			interrupt-parent = <&ps7_scugic_0>;
 			interrupts = <0 7 4>;
 		} ;
+		elphel_ahci: elphel-ahci@80000000 {
+                        compatible = "elphel,elphel-ahci";
+                        interrupt-parent = <&ps7_scugic_0>;
+                        interrupts = <0x0 0x1d 0x4>;
+                        reg = <0x80000000 0x1000>;
+                        clb_offs = <0x800>;
+                        fb_offs = <0xc00>;
+                };
 	} ;
 	elphel393_pwr: elphel393-pwr@0 {
 		compatible = "elphel,elphel393-pwr-1.00";

recipes-kernel/linux/config/elphel393.cfg

@@ -22,4 +22,12 @@ CONFIG_CMA_SIZE_SEL_MBYTES=y
 CONFIG_CMA_ALIGNMENT=8
 #CONFIG_CMA_AREAS=7 #obsolete
 
-CONFIG_MTD_TESTS=y
+CONFIG_MTD_TESTS=y
\ No newline at end of file
+
+#
+# AHCI driver related configs
+#
+CONFIG_ATA=y
+CONFIG_ATA_VERBOSE_ERROR=y
+CONFIG_SATA_AHCI_PLATFORM=y
+CONFIG_AHCI_ELPHEL=M

recipes-kernel/linux/linux-xlnx/drivers-ahci-elphel.patch

+diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
+index 5f60155..5d93116 100644
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -157,6 +157,16 @@ config AHCI_XGENE
+ 	help
+ 	 This option enables support for APM X-Gene SoC SATA host controller.
+ 
++config AHCI_ELPHEL
++	tristate "Elphel AHCI SATA driver support for elphel393 camera series"
++	depends on ARM
++	default m if ARM
++	help
++	  This option enables support for Elphel AHCI SATA controller in elphel393
++	  series cameras.
++
++	  If unsure, say N.
++
+ config SATA_FSL
+ 	tristate "Freescale 3.0Gbps SATA support"
+ 	depends on FSL_SOC
+diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
+index ae41107..212dfed 100644
+--- a/drivers/ata/Makefile
++++ b/drivers/ata/Makefile
+@@ -5,6 +5,7 @@ obj-$(CONFIG_ATA)		+= libata.o
+ obj-$(CONFIG_SATA_AHCI)		+= ahci.o libahci.o
+ obj-$(CONFIG_SATA_ACARD_AHCI)	+= acard-ahci.o libahci.o
+ obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o libahci_platform.o
++obj-$(CONFIG_AHCI_ELPHEL)	+= ahci_elphel.o libahci.o libahci_platform.o
+ obj-$(CONFIG_SATA_FSL)		+= sata_fsl.o
+ obj-$(CONFIG_SATA_INIC162X)	+= sata_inic162x.o
+ obj-$(CONFIG_SATA_SIL24)	+= sata_sil24.o

recipes-kernel/linux/linux-xlnx_4.0.bbappend

@@ -6,6 +6,7 @@ SRC_URI_append += " file://xilinx_emacps.c.patch"
 SRC_URI_append += " file://xilinx_uartps.c.patch"
 SRC_URI_append += " file://si5338_vsc330x.patch"
 SRC_URI_append += " file://drivers-elphel.patch"
+SRC_URI_append += " file://drivers-ahci-elphel.patch"
 
 SRC_URI_append += " file://${MACHINE}.scc"
 KERNEL_FEATURES_append = " ${MACHINE}.scc"