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serial: fdt: add device tree support for pl01x

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This patch adds device tree support for arm pl010/pl011 driver.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Vikas Manocha 2015-05-06 11:46:29 -07:00 • committed by Tom Rini
parent a69bdba9c6
commit 6975172930
2 changed files with 36 additions and 1 deletions
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7
doc/device-tree-bindings/serial/pl01x.txt Normal file
View file

@ -0,0 +1,7 @@
* ARM AMBA Primecell PL011 & PL010 serial UART
Required properties:
- compatible: must be "arm,primecell", "arm,pl011" or "arm,pl010"
- reg: exactly one register range with length 0x1000
- clock: input clock frequency for the UART (used to calculate the baud
rate divisor)

30
drivers/serial/serial_pl01x.c
View file

@ -20,6 +20,9 @@
#include <dm/platform_data/serial_pl01x.h> #include <dm/platform_data/serial_pl01x.h>
#include <linux/compiler.h> #include <linux/compiler.h>
#include "serial_pl01x_internal.h" #include "serial_pl01x_internal.h"
#include <fdtdec.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_DM_SERIAL #ifndef CONFIG_DM_SERIAL
@ -28,7 +31,6 @@ static enum pl01x_type pl01x_type __attribute__ ((section(".data")));
static struct pl01x_regs *base_regs __attribute__ ((section(".data"))); static struct pl01x_regs *base_regs __attribute__ ((section(".data")));
#define NUM_PORTS (sizeof(port)/sizeof(port[0])) #define NUM_PORTS (sizeof(port)/sizeof(port[0]))
DECLARE_GLOBAL_DATA_PTR;
#endif #endif
static int pl01x_putc(struct pl01x_regs *regs, char c) static int pl01x_putc(struct pl01x_regs *regs, char c)
@ -351,9 +353,35 @@ static const struct dm_serial_ops pl01x_serial_ops = {
.setbrg = pl01x_serial_setbrg, .setbrg = pl01x_serial_setbrg,
}; };
#ifdef CONFIG_OF_CONTROL
static const struct udevice_id pl01x_serial_id[] ={
{.compatible = "arm,pl011", .data = TYPE_PL011},
{.compatible = "arm,pl010", .data = TYPE_PL010},
{}
};
static int pl01x_serial_ofdata_to_platdata(struct udevice *dev)
{
struct pl01x_serial_platdata *plat = dev_get_platdata(dev);
fdt_addr_t addr;
addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
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->type = dev_get_driver_data(dev);
return 0;
}
#endif
U_BOOT_DRIVER(serial_pl01x) = { U_BOOT_DRIVER(serial_pl01x) = {
.name = "serial_pl01x", .name = "serial_pl01x",
.id = UCLASS_SERIAL, .id = UCLASS_SERIAL,
.of_match = of_match_ptr(pl01x_serial_id),
.ofdata_to_platdata = of_match_ptr(pl01x_serial_ofdata_to_platdata),
.platdata_auto_alloc_size = sizeof(struct pl01x_serial_platdata),
.probe = pl01x_serial_probe, .probe = pl01x_serial_probe,
.ops = &pl01x_serial_ops, .ops = &pl01x_serial_ops,
.flags = DM_FLAG_PRE_RELOC, .flags = DM_FLAG_PRE_RELOC,