diff options
| -rw-r--r-- | doc/device-tree-bindings/serial/bcm2835-aux-uart.txt | 10 | ||||
| -rw-r--r-- | drivers/serial/serial_bcm283x_mu.c | 28 |
2 files changed, 38 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/serial/bcm2835-aux-uart.txt b/doc/device-tree-bindings/serial/bcm2835-aux-uart.txt new file mode 100644 index 0000000..75886e5 --- /dev/null +++ b/doc/device-tree-bindings/serial/bcm2835-aux-uart.txt @@ -0,0 +1,10 @@ +* BCM283x mini UART + +Required properties: +- compatible: must be "brcm,bcm2835-aux-uart" +- reg: exactly one register range with length 0x1000 +- clock: input clock frequency for the UART (used to calculate the baud + rate divisor) + +Optional properties: +- skip-init: if present, the baud rate divisor is not changed diff --git a/drivers/serial/serial_bcm283x_mu.c b/drivers/serial/serial_bcm283x_mu.c index f4e062f..e361909 100644 --- a/drivers/serial/serial_bcm283x_mu.c +++ b/drivers/serial/serial_bcm283x_mu.c @@ -25,6 +25,8 @@ #include <linux/compiler.h> #include <fdtdec.h> +DECLARE_GLOBAL_DATA_PTR; + struct bcm283x_mu_regs { u32 io; u32 iir; @@ -132,9 +134,35 @@ static const struct dm_serial_ops bcm283x_mu_serial_ops = { .setbrg = bcm283x_mu_serial_setbrg, }; +#if CONFIG_IS_ENABLED(OF_CONTROL) +static const struct udevice_id bcm283x_mu_serial_id[] = { + {.compatible = "brcm,bcm2835-aux-uart"}, + {} +}; + +static int bcm283x_mu_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev); + fdt_addr_t addr; + + addr = dev_get_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + plat->base = addr; + plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "clock", 1); + plat->skip_init = fdtdec_get_bool(gd->fdt_blob, dev->of_offset, + "skip-init"); + plat->disabled = false; + return 0; +} +#endif + U_BOOT_DRIVER(serial_bcm283x_mu) = { .name = "serial_bcm283x_mu", .id = UCLASS_SERIAL, + .of_match = of_match_ptr(bcm283x_mu_serial_id), + .ofdata_to_platdata = of_match_ptr(bcm283x_mu_serial_ofdata_to_platdata), .platdata_auto_alloc_size = sizeof(struct bcm283x_mu_serial_platdata), .probe = bcm283x_mu_serial_probe, .ops = &bcm283x_mu_serial_ops, |