mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
![Arnd Bergmann](/assets/img/avatar_default.png)
Coldfire is now the only target that implements the clk_get()/clk_put() helpers itself rather than using the common implementation. Most coldfire variants only have two distinct clocks and use the clk code purely for lookup. Change those over to use clkdev_lookup instead but leave the custom clk interface for those two clocks. Also leave the four SoCs that have gated clocks. Acked-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/***************************************************************************/
|
|
|
|
/*
|
|
* m528x.c -- platform support for ColdFire 528x based boards
|
|
*
|
|
* Sub-architcture dependent initialization code for the Freescale
|
|
* 5280, 5281 and 5282 CPUs.
|
|
*
|
|
* Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
|
|
* Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
|
|
*/
|
|
|
|
/***************************************************************************/
|
|
|
|
#include <linux/clkdev.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/coldfire.h>
|
|
#include <asm/mcfsim.h>
|
|
#include <asm/mcfuart.h>
|
|
#include <asm/mcfclk.h>
|
|
|
|
/***************************************************************************/
|
|
|
|
DEFINE_CLK(pll, "pll.0", MCF_CLK);
|
|
DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
|
|
|
|
static struct clk_lookup m528x_clk_lookup[] = {
|
|
CLKDEV_INIT(NULL, "pll.0", &clk_pll),
|
|
CLKDEV_INIT(NULL, "sys.0", &clk_sys),
|
|
CLKDEV_INIT("mcfpit.0", NULL, &clk_pll),
|
|
CLKDEV_INIT("mcfpit.1", NULL, &clk_pll),
|
|
CLKDEV_INIT("mcfpit.2", NULL, &clk_pll),
|
|
CLKDEV_INIT("mcfpit.3", NULL, &clk_pll),
|
|
CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
|
|
CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
|
|
CLKDEV_INIT("mcfuart.2", NULL, &clk_sys),
|
|
CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
|
|
CLKDEV_INIT("fec.0", NULL, &clk_sys),
|
|
CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),
|
|
};
|
|
|
|
/***************************************************************************/
|
|
|
|
static void __init m528x_qspi_init(void)
|
|
{
|
|
#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
|
|
/* setup Port QS for QSPI with gpio CS control */
|
|
__raw_writeb(0x07, MCFGPIO_PQSPAR);
|
|
#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
static void __init m528x_i2c_init(void)
|
|
{
|
|
#if IS_ENABLED(CONFIG_I2C_IMX)
|
|
u16 paspar;
|
|
|
|
/* setup Port AS Pin Assignment Register for I2C */
|
|
/* set PASPA0 to SCL and PASPA1 to SDA */
|
|
paspar = readw(MCFGPIO_PASPAR);
|
|
paspar |= 0xF;
|
|
writew(paspar, MCFGPIO_PASPAR);
|
|
#endif /* IS_ENABLED(CONFIG_I2C_IMX) */
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
static void __init m528x_uarts_init(void)
|
|
{
|
|
u8 port;
|
|
|
|
/* make sure PUAPAR is set for UART0 and UART1 */
|
|
port = readb(MCFGPIO_PUAPAR);
|
|
port |= 0x03 | (0x03 << 2);
|
|
writeb(port, MCFGPIO_PUAPAR);
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
static void __init m528x_fec_init(void)
|
|
{
|
|
u16 v16;
|
|
|
|
/* Set multi-function pins to ethernet mode for fec0 */
|
|
v16 = readw(MCFGPIO_PASPAR);
|
|
writew(v16 | 0xf00, MCFGPIO_PASPAR);
|
|
writeb(0xc0, MCFGPIO_PEHLPAR);
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
#ifdef CONFIG_WILDFIRE
|
|
void wildfire_halt(void)
|
|
{
|
|
writeb(0, 0x30000007);
|
|
writeb(0x2, 0x30000007);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_WILDFIREMOD
|
|
void wildfiremod_halt(void)
|
|
{
|
|
printk(KERN_INFO "WildFireMod hibernating...\n");
|
|
|
|
/* Set portE.5 to Digital IO */
|
|
writew(readw(MCFGPIO_PEPAR) & ~(1 << (5 * 2)), MCFGPIO_PEPAR);
|
|
|
|
/* Make portE.5 an output */
|
|
writeb(readb(MCFGPIO_PDDR_E) | (1 << 5), MCFGPIO_PDDR_E);
|
|
|
|
/* Now toggle portE.5 from low to high */
|
|
writeb(readb(MCFGPIO_PODR_E) & ~(1 << 5), MCFGPIO_PODR_E);
|
|
writeb(readb(MCFGPIO_PODR_E) | (1 << 5), MCFGPIO_PODR_E);
|
|
|
|
printk(KERN_EMERG "Failed to hibernate. Halting!\n");
|
|
}
|
|
#endif
|
|
|
|
void __init config_BSP(char *commandp, int size)
|
|
{
|
|
#ifdef CONFIG_WILDFIRE
|
|
mach_halt = wildfire_halt;
|
|
#endif
|
|
#ifdef CONFIG_WILDFIREMOD
|
|
mach_halt = wildfiremod_halt;
|
|
#endif
|
|
mach_sched_init = hw_timer_init;
|
|
m528x_uarts_init();
|
|
m528x_fec_init();
|
|
m528x_qspi_init();
|
|
m528x_i2c_init();
|
|
|
|
clkdev_add_table(m528x_clk_lookup, ARRAY_SIZE(m528x_clk_lookup));
|
|
}
|
|
|
|
/***************************************************************************/
|