mirror/rt-n56u
1
0
Fork 0
mirror of https://github.com/hanwckf/rt-n56u.git synced 2025-12-20 01:10:08 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

kernel: fix GPIO Read-Modify-Write potencial problem fix reset MT7603

Browse Source
This commit is contained in:
Oleg Sviridov
2020-07-17 17:32:20 +03:00
committed by hanwckf
parent 66ce9e68d4
commit cc814d0ce0
1 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
trunk/linux-3.4.x/arch/mips/rt2880/pci.c
View File

@@ -112,7 +112,8 @@ static int pcie_link_status = 0;
#define GPIO_PCIE_PORT2 7 // TXD3 (I2S_WS)
#endif
#define RALINK_GPIO_CTRL0 *(volatile u32 *)(RALINK_PIO_BASE + 0x00)
#define RALINK_GPIO_DATA0 *(volatile u32 *)(RALINK_PIO_BASE + 0x20)
#define RALINK_GPIO_DSET0 *(volatile u32 *)(RALINK_PIO_BASE + 0x30)
#define RALINK_GPIO_DCLR0 *(volatile u32 *)(RALINK_PIO_BASE + 0x40)
#endif
#define ASSERT_SYSRST_PCIE(val) do { \
@@ -639,7 +640,7 @@ int __init init_ralink_pci(void)
mdelay(50);
RALINK_GPIO_CTRL0 |= val; // switch PERST_N pin to output mode
mdelay(50);
RALINK_GPIO_DATA0 &= ~(val); // fall PERST_N pin (reset peripherals)
RALINK_GPIO_DCLR0 = val; // fall PERST_N pin (reset peripherals)
#else /* !defined (GPIO_PERST) */
RALINK_GPIOMODE &= ~(0x3<<PCIE_SHARE_PIN_SW); // fall PERST_N pin (reset peripherals)
#endif
@@ -689,7 +690,7 @@ int __init init_ralink_pci(void)
#if defined (CONFIG_PCIE_PORT2)
val |= (0x1<<GPIO_PCIE_PORT2);
#endif
RALINK_GPIO_DATA0 |= val; // rise PERST_N pin (complete reset peripherals)
RALINK_GPIO_DSET0 = val; // rise PERST_N pin (complete reset peripherals)
#else /* !defined (GPIO_PERST) */
RALINK_PCI_PCICFG_ADDR &= ~(1<<1); // release PCIRST
#endif