board: ti: am57xx-idk: Configure the CDCE913 clock synthesizer

AM57xx-IDK boards contain the CDCE913 clock synthesizer, and their
reset crystal capacitance load value of 10pF is wrong leading into
lost packets in certain networking tests. Add DT data for this
device, and probe it from the board file to program the crystal
capacitance load value to 0pF to avoid any problems.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --git a/arch/arm/dts/am571x-idk-u-boot.dtsi b/arch/arm/dts/am571x-idk-u-boot.dtsi
new file mode 100644 (file)
index 0000000..6519920
--- /dev/null
+++ b/arch/arm/dts/am571x-idk-u-boot.dtsi
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#include "am57xx-idk-common-u-boot.dtsi"

diff --git a/arch/arm/dts/am572x-idk-u-boot.dtsi b/arch/arm/dts/am572x-idk-u-boot.dtsi
new file mode 100644 (file)
index 0000000..6519920
--- /dev/null
+++ b/arch/arm/dts/am572x-idk-u-boot.dtsi
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#include "am57xx-idk-common-u-boot.dtsi"

diff --git a/arch/arm/dts/am574x-idk-u-boot.dtsi b/arch/arm/dts/am574x-idk-u-boot.dtsi
new file mode 100644 (file)
index 0000000..6519920
--- /dev/null
+++ b/arch/arm/dts/am574x-idk-u-boot.dtsi
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#include "am57xx-idk-common-u-boot.dtsi"

diff --git a/arch/arm/dts/am57xx-idk-common-u-boot.dtsi b/arch/arm/dts/am57xx-idk-common-u-boot.dtsi
new file mode 100644 (file)
index 0000000..b07aea0
--- /dev/null
+++ b/arch/arm/dts/am57xx-idk-common-u-boot.dtsi
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#include "omap5-u-boot.dtsi"
+
+/ {
+       xtal25mhz: xtal25mhz {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <25000000>;
+       };
+};
+
+&i2c1 {
+       cdce913: cdce913@65 {
+               compatible = "ti,cdce913";
+               reg = <0x65>;
+               clocks = <&xtal25mhz>;
+               #clock-cells = <1>;
+               xtal-load-pf = <0>;
+       };
+};

diff --git a/board/ti/am57xx/board.c b/board/ti/am57xx/board.c
index f78e6c2..237a834 100644 (file)
--- a/board/ti/am57xx/board.c
+++ b/board/ti/am57xx/board.c
@@ -30,6 +30,7 @@
 #include <dwc3-omap-uboot.h>
 #include <ti-usb-phy-uboot.h>
 #include <mmc.h>
+#include <dm/uclass.h>
 
 #include "../common/board_detect.h"
 #include "mux_data.h"
@@ -689,6 +690,7 @@ int board_late_init(void)
 {
        setup_board_eeprom_env();
        u8 val;
+       struct udevice *dev;
 
        /*
         * DEV_CTRL.DEV_ON = 1 please - else palmas switches off in 8 seconds
@@ -720,6 +722,9 @@ int board_late_init(void)
 
        am57x_idk_lcd_detect();
 
+       /* Just probe the potentially supported cdce913 device */
+       uclass_get_device(UCLASS_CLK, 0, &dev);
+
 #if !defined(CONFIG_SPL_BUILD)
        board_ti_set_ethaddr(2);
 #endif

diff --git a/configs/am57xx_evm_defconfig b/configs/am57xx_evm_defconfig
index 3b613e1..e2f558c 100644 (file)
--- a/configs/am57xx_evm_defconfig
+++ b/configs/am57xx_evm_defconfig
@@ -98,3 +98,5 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="Texas Instruments"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0451
 CONFIG_USB_GADGET_PRODUCT_NUM=0xd022
+CONFIG_CLK=y
+CONFIG_CLK_CDCE9XX=y