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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/mips/mti-malta/malta-platform.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | arch/mips/mti-malta/malta-platform.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c new file mode 100644 index 000000000..4ffbcc58c --- /dev/null +++ b/arch/mips/mti-malta/malta-platform.c @@ -0,0 +1,77 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2006, 07 MIPS Technologies, Inc. + * written by Ralf Baechle (ralf@linux-mips.org) + * written by Ralf Baechle <ralf@linux-mips.org> + * + * Copyright (C) 2008 Wind River Systems, Inc. + * updated by Tiejun Chen <tiejun.chen@windriver.com> + * + * 1. Probe driver for the Malta's UART ports: + * + * o 2 ports in the SMC SuperIO + * o 1 port in the CBUS UART, a discrete 16550 which normally is only used + * for bringups. + * + * We don't use 8250_platform.c on Malta as it would result in the CBUS + * UART becoming ttyS0. + * + * 2. Register RTC-CMOS platform device on Malta. + */ +#include <linux/init.h> +#include <linux/serial_8250.h> +#include <linux/irq.h> +#include <linux/platform_device.h> +#include <asm/mips-boards/maltaint.h> + +#define SMC_PORT(base, int) \ +{ \ + .iobase = base, \ + .irq = int, \ + .uartclk = 1843200, \ + .iotype = UPIO_PORT, \ + .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | \ + UPF_MAGIC_MULTIPLIER, \ + .regshift = 0, \ +} + +#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP) + +static struct plat_serial8250_port uart8250_data[] = { + SMC_PORT(0x3F8, 4), + SMC_PORT(0x2F8, 3), +#ifndef CONFIG_MIPS_CMP + { + .mapbase = 0x1f000900, /* The CBUS UART */ + .irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2, + .uartclk = 3686400, /* Twice the usual clk! */ + .iotype = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ? + UPIO_MEM32BE : UPIO_MEM32, + .flags = CBUS_UART_FLAGS, + .regshift = 3, + }, +#endif + { }, +}; + +static struct platform_device malta_uart8250_device = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = uart8250_data, + }, +}; + +static struct platform_device *malta_devices[] __initdata = { + &malta_uart8250_device, +}; + +static int __init malta_add_devices(void) +{ + return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices)); +} + +device_initcall(malta_add_devices); |