diff options
| author | Tero Kristo | 2019-09-27 19:14:28 +0300 |
|---|---|---|
| committer | Tom Rini | 2019-10-11 13:32:39 -0400 |
| commit | 9850d4e52f7f8da1bab7fae32f90e8eba7b4f6af (patch) | |
| tree | eda030a2d6c8602a85030b59d91d9a8ad803aaa0 | |
| parent | e8e683d33b0ccd43e03809bf4ea88a899a867473 (diff) | |
board: ti: am43xx-idk: Configure the CDCE913 clock synthesizer
AM43xx-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>
| -rw-r--r-- | arch/arm/dts/am437x-idk-evm-u-boot.dtsi | 14 | ||||
| -rw-r--r-- | board/ti/am43xx/board.c | 5 | ||||
| -rw-r--r-- | configs/am43xx_evm_defconfig | 2 |
3 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/dts/am437x-idk-evm-u-boot.dtsi b/arch/arm/dts/am437x-idk-evm-u-boot.dtsi index 3aa9195e44d..50fe09cfc36 100644 --- a/arch/arm/dts/am437x-idk-evm-u-boot.dtsi +++ b/arch/arm/dts/am437x-idk-evm-u-boot.dtsi @@ -9,6 +9,12 @@ ocp { u-boot,dm-spl; }; + + xtal25mhz: xtal25mhz { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <25000000>; + }; }; &uart0 { @@ -17,6 +23,14 @@ &i2c0 { u-boot,dm-spl; + + cdce913: cdce913@65 { + compatible = "ti,cdce913"; + reg = <0x65>; + clocks = <&xtal25mhz>; + #clock-cells = <1>; + xtal-load-pf = <0>; + }; }; &mmc1 { diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c index 2e09cc20e8c..f5ecf871bca 100644 --- a/board/ti/am43xx/board.c +++ b/board/ti/am43xx/board.c @@ -720,6 +720,7 @@ static int device_okay(const char *path) int board_late_init(void) { + struct udevice *dev; #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG set_board_info_env(NULL); @@ -737,6 +738,10 @@ int board_late_init(void) if (device_okay("/ocp/omap_dwc3@483c0000")) enable_usb_clocks(1); #endif + + /* Just probe the potentially supported cdce913 device */ + uclass_get_device(UCLASS_CLK, 0, &dev); + return 0; } #endif diff --git a/configs/am43xx_evm_defconfig b/configs/am43xx_evm_defconfig index 7c74047f3ae..7367c6952b0 100644 --- a/configs/am43xx_evm_defconfig +++ b/configs/am43xx_evm_defconfig @@ -78,3 +78,5 @@ CONFIG_USB_GADGET_VENDOR_NUM=0x0403 CONFIG_USB_GADGET_PRODUCT_NUM=0xbd00 CONFIG_USB_GADGET_DOWNLOAD=y CONFIG_USB_ETHER=y +CONFIG_CLK=y +CONFIG_CLK_CDCE9XX=y |