mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 21:50:54 +07:00
7350f41972
Wrong MPP configuration would cause <cpu>_mpp_conf loop infinitely because the mpp list iterator would not be incremented. Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
|
|
* arch/arm/mach-mv78x00/mpp.c
|
|
*
|
|
* MPP functions for Marvell MV78x00 SoCs
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mbus.h>
|
|
#include <linux/io.h>
|
|
#include <asm/gpio.h>
|
|
#include <mach/hardware.h>
|
|
#include "common.h"
|
|
#include "mpp.h"
|
|
|
|
static unsigned int __init mv78xx0_variant(void)
|
|
{
|
|
u32 dev, rev;
|
|
|
|
mv78xx0_pcie_id(&dev, &rev);
|
|
|
|
if (dev == MV78100_DEV_ID && rev >= MV78100_REV_A0)
|
|
return MPP_78100_A0_MASK;
|
|
|
|
printk(KERN_ERR "MPP setup: unknown mv78x00 variant "
|
|
"(dev %#x rev %#x)\n", dev, rev);
|
|
return 0;
|
|
}
|
|
|
|
#define MPP_CTRL(i) (DEV_BUS_VIRT_BASE + (i) * 4)
|
|
#define MPP_NR_REGS (1 + MPP_MAX/8)
|
|
|
|
void __init mv78xx0_mpp_conf(unsigned int *mpp_list)
|
|
{
|
|
u32 mpp_ctrl[MPP_NR_REGS];
|
|
unsigned int variant_mask;
|
|
int i;
|
|
|
|
variant_mask = mv78xx0_variant();
|
|
if (!variant_mask)
|
|
return;
|
|
|
|
/* Initialize gpiolib. */
|
|
orion_gpio_init();
|
|
|
|
printk(KERN_DEBUG "initial MPP regs:");
|
|
for (i = 0; i < MPP_NR_REGS; i++) {
|
|
mpp_ctrl[i] = readl(MPP_CTRL(i));
|
|
printk(" %08x", mpp_ctrl[i]);
|
|
}
|
|
printk("\n");
|
|
|
|
for ( ; *mpp_list; mpp_list++) {
|
|
unsigned int num = MPP_NUM(*mpp_list);
|
|
unsigned int sel = MPP_SEL(*mpp_list);
|
|
int shift, gpio_mode;
|
|
|
|
if (num > MPP_MAX) {
|
|
printk(KERN_ERR "mv78xx0_mpp_conf: invalid MPP "
|
|
"number (%u)\n", num);
|
|
continue;
|
|
}
|
|
if (!(*mpp_list & variant_mask)) {
|
|
printk(KERN_WARNING
|
|
"mv78xx0_mpp_conf: requested MPP%u config "
|
|
"unavailable on this hardware\n", num);
|
|
continue;
|
|
}
|
|
|
|
shift = (num & 7) << 2;
|
|
mpp_ctrl[num / 8] &= ~(0xf << shift);
|
|
mpp_ctrl[num / 8] |= sel << shift;
|
|
|
|
gpio_mode = 0;
|
|
if (*mpp_list & MPP_INPUT_MASK)
|
|
gpio_mode |= GPIO_INPUT_OK;
|
|
if (*mpp_list & MPP_OUTPUT_MASK)
|
|
gpio_mode |= GPIO_OUTPUT_OK;
|
|
if (sel != 0)
|
|
gpio_mode = 0;
|
|
orion_gpio_set_valid(num, gpio_mode);
|
|
}
|
|
|
|
printk(KERN_DEBUG " final MPP regs:");
|
|
for (i = 0; i < MPP_NR_REGS; i++) {
|
|
writel(mpp_ctrl[i], MPP_CTRL(i));
|
|
printk(" %08x", mpp_ctrl[i]);
|
|
}
|
|
printk("\n");
|
|
}
|