mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 14:16:37 +07:00
ee36d17221
N.B. This is old style of hardcoding platform device specific info in code and it's instantiation thererof using platform_add_devices(). Subsequent patches replace this with DeviceTree based runtime probe. This patch has been retained just as an example of "don't-do-this" for newer kernel ports. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/*
|
|
* ARC FPGA Platform support code
|
|
*
|
|
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/console.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/clk.h>
|
|
#include <plat/memmap.h>
|
|
|
|
/*----------------------- Platform Devices -----------------------------*/
|
|
|
|
#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)
|
|
|
|
static unsigned long arc_uart_info[] = {
|
|
CONFIG_ARC_SERIAL_BAUD, /* uart->baud */
|
|
-1, /* uart->port.uartclk */
|
|
-1, /* uart->is_emulated (runtime @running_on_hw) */
|
|
0
|
|
};
|
|
|
|
#define ARC_UART_DEV(n) \
|
|
\
|
|
static struct resource arc_uart##n##_res[] = { \
|
|
{ \
|
|
.start = UART##n##_BASE, \
|
|
.end = UART##n##_BASE + 0xFF, \
|
|
.flags = IORESOURCE_MEM, \
|
|
}, \
|
|
{ \
|
|
.start = UART##n##_IRQ, \
|
|
.end = UART##n##_IRQ, \
|
|
.flags = IORESOURCE_IRQ, \
|
|
}, \
|
|
}; \
|
|
\
|
|
static struct platform_device arc_uart##n##_dev = { \
|
|
.name = "arc-uart", \
|
|
.id = n, \
|
|
.num_resources = ARRAY_SIZE(arc_uart##n##_res), \
|
|
.resource = arc_uart##n##_res, \
|
|
.dev = { \
|
|
.platform_data = &arc_uart_info, \
|
|
}, \
|
|
}
|
|
|
|
ARC_UART_DEV(0);
|
|
#if CONFIG_SERIAL_ARC_NR_PORTS > 1
|
|
ARC_UART_DEV(1);
|
|
#endif
|
|
|
|
static struct platform_device *fpga_early_devs[] __initdata = {
|
|
#if defined(CONFIG_SERIAL_ARC_CONSOLE)
|
|
&arc_uart0_dev,
|
|
#endif
|
|
};
|
|
|
|
static void arc_fpga_serial_init(void)
|
|
{
|
|
arc_uart_info[1] = arc_get_core_freq();
|
|
|
|
/* To let driver workaround ISS bug: baudh Reg can't be set to 0 */
|
|
arc_uart_info[2] = !running_on_hw;
|
|
|
|
early_platform_add_devices(fpga_early_devs,
|
|
ARRAY_SIZE(fpga_early_devs));
|
|
|
|
/*
|
|
* ARC console driver registers itself as an early platform driver
|
|
* of class "earlyprintk".
|
|
* Install it here, followed by probe of devices.
|
|
* The installation here doesn't require earlyprintk in command line
|
|
* To do so however, replace the lines below with
|
|
* parse_early_param();
|
|
* early_platform_driver_probe("earlyprintk", 1, 1);
|
|
* ^^
|
|
*/
|
|
early_platform_driver_register_all("earlyprintk");
|
|
early_platform_driver_probe("earlyprintk", 1, 0);
|
|
|
|
/*
|
|
* This is to make sure that arc uart would be preferred console
|
|
* despite one/more of following:
|
|
* -command line lacked "console=ttyARC0" or
|
|
* -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever)
|
|
* Note that this needs to be done after above early console is reg,
|
|
* otherwise the early console never gets a chance to run.
|
|
*/
|
|
add_preferred_console("ttyARC", 0, "115200");
|
|
}
|
|
|
|
#else
|
|
|
|
static void arc_fpga_serial_init(void)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_SERIAL_ARC */
|
|
|
|
/*
|
|
* Early Platform Initialization called from setup_arch()
|
|
*/
|
|
void __init arc_platform_early_init(void)
|
|
{
|
|
pr_info("[plat-arcfpga]: registering early dev resources\n");
|
|
|
|
arc_fpga_serial_init();
|
|
}
|
|
|
|
static struct platform_device *fpga_devs[] __initdata = {
|
|
#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)
|
|
&arc_uart0_dev,
|
|
#if CONFIG_SERIAL_ARC_NR_PORTS > 1
|
|
&arc_uart1_dev,
|
|
#endif
|
|
#endif
|
|
};
|
|
|
|
int __init fpga_plat_init(void)
|
|
{
|
|
pr_info("[plat-arcfpga]: registering device resources\n");
|
|
|
|
platform_add_devices(fpga_devs, ARRAY_SIZE(fpga_devs));
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(fpga_plat_init);
|