config du tpm dans la dts

conf/machine/pengwyn.conf

@@ -10,7 +10,7 @@ IMAGE_CLASSES += "sdcard_image-pengwyn"
 IMAGE_FSTYPES ?= "tar.bz2 ext4 wic wic.bmap"
 WKS_FILE ?= "pengwyn.wks"
 #MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "kernel-image kernel-devicetree"
-MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "kernel-image"
+MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "kernel-image kernel-modules"
 do_image_wic[depends] += " \
 	mtools-native:do_populate_sysroot \
 	dosfstools-native:do_populate_sysroot \
@@ -18,6 +18,11 @@ do_image_wic[depends] += " \
 	virtual/dtb:do_deploy \
 "
 
+# A list of machine-dependent packages not essential for booting the image. 
+# Thus, the build does not fail if the packages do not exist. 
+# However, the packages are required for a fully-featured image
+#MACHINE_EXTRA_RRECOMMENDS = "kernel-modules"
+
 # Normally AM335 boards use ttyS0, but ICE uses ttyS3, so try both
 SERIAL_CONSOLES = "115200;ttyS0 115200;ttyO0 115200;ttyAMA0"
 SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"

recipes-kernel/dts/files/am335x-pengwyn.dts

@@ -330,6 +330,16 @@
 	pinctrl-0 = <&spi0_pins>;
 
 	status = "okay";
+	slb9670@0 {
+		// number of cells required to define a chip select address on the SPI bus.
+		#address-cells = <1>;
+		// should be zero
+		#size-cells = <0>;
+                // name of SPI bus controller following generic names recommended practice
+                compatible = "infineon,slb9670";
+		spi-max-frequency = <500000>;
+        	reg = <0>;
+	};
 };
 
 &elm {