diff options
Diffstat (limited to 'board/raspberrypi/rpi/rpi.c')
| -rw-r--r-- | board/raspberrypi/rpi/rpi.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index fbfbf6cbbc..6245b3678f 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -50,7 +50,7 @@ U_BOOT_DEVICE(bcm2835_serials) = { .platdata = &serial_platdata, }; #else -static const struct bcm283x_mu_serial_platdata serial_platdata = { +static struct bcm283x_mu_serial_platdata serial_platdata = { .base = 0x3f215040, .clock = 250000000, .skip_init = true, @@ -452,6 +452,38 @@ int board_init(void) return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); } +#ifndef CONFIG_PL01X_SERIAL +static bool rpi_is_serial_active(void) +{ + int serial_gpio = 15; + struct udevice *dev; + + /* + * The RPi3 disables the mini uart by default. The easiest way to find + * out whether it is available is to check if the RX pin is muxed. + */ + + if (uclass_first_device(UCLASS_GPIO, &dev) || !dev) + return true; + + if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5) + return false; + + return true; +} +#endif + +int board_early_init_f(void) +{ +#ifndef CONFIG_PL01X_SERIAL + /* Disable mini-UART I/O if it's not pinmuxed to our pins */ + if (!rpi_is_serial_active()) + serial_platdata.disabled = true; +#endif + + return 0; +} + int board_mmc_init(bd_t *bis) { ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); |