Merge remote-tracking branch 'regulator/fix/qcom-spmi' into regulator-linus
[sfrench/cifs-2.6.git] / arch / arm / mach-footbridge / personal-pci.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/arch/arm/mach-footbridge/personal-pci.c
4  *
5  * PCI bios-type initialisation for PCI machines
6  *
7  * Bits taken from various places.
8  */
9 #include <linux/kernel.h>
10 #include <linux/pci.h>
11 #include <linux/init.h>
12
13 #include <asm/irq.h>
14 #include <asm/mach/pci.h>
15 #include <asm/mach-types.h>
16
17 static int irqmap_personal_server[] __initdata = {
18         IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
19         IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
20 };
21
22 static int __init personal_server_map_irq(const struct pci_dev *dev, u8 slot,
23         u8 pin)
24 {
25         unsigned char line;
26
27         pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
28
29         if (line > 0x40 && line <= 0x5f) {
30                 /* line corresponds to the bit controlling this interrupt
31                  * in the footbridge.  Ignore the first 8 interrupt bits,
32                  * look up the rest in the map.  IN0 is bit number 8
33                  */
34                 return irqmap_personal_server[(line & 0x1f) - 8];
35         } else if (line == 0) {
36                 /* no interrupt */
37                 return 0;
38         } else
39                 return irqmap_personal_server[(line - 1) & 3];
40 }
41
42 static struct hw_pci personal_server_pci __initdata = {
43         .map_irq                = personal_server_map_irq,
44         .nr_controllers         = 1,
45         .ops                    = &dc21285_ops,
46         .setup                  = dc21285_setup,
47         .preinit                = dc21285_preinit,
48         .postinit               = dc21285_postinit,
49 };
50
51 static int __init personal_pci_init(void)
52 {
53         if (machine_is_personal_server())
54                 pci_common_init(&personal_server_pci);
55         return 0;
56 }
57
58 subsys_initcall(personal_pci_init);