1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
From 4d6a758f2cd2122a7d895f913854c13da62ba6df Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 13 Mar 2020 21:09:12 +0100
Subject: [PATCH] staging: mt7621-pci: release gpios after pci initialization
R3G's LEDs fail to initialize because one of them uses GPIO8
Hence, release the GPIO resources after PCIe initialization
and properly release also in driver error path.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200313200913.24321-6-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -484,6 +484,15 @@ static void mt7621_pcie_reset_ep_deasser
mdelay(PERST_DELAY_MS);
}
+static void mt7621_pcie_release_gpios(struct mt7621_pcie *pcie)
+{
+ struct mt7621_pcie_port *port;
+
+ list_for_each_entry(port, &pcie->ports, list)
+ if (port->gpio_rst)
+ gpiod_put(port->gpio_rst);
+}
+
static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie)
{
struct device *dev = pcie->dev;
@@ -683,7 +692,8 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pcie_init_virtual_bridges(pcie);
if (err) {
dev_err(dev, "Nothing is connected in virtual bridges. Exiting...");
- return 0;
+ err = 0;
+ goto out_release_gpios;
}
mt7621_pcie_enable_ports(pcie);
@@ -691,7 +701,7 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pci_parse_request_of_pci_ranges(pcie);
if (err) {
dev_err(dev, "Error requesting pci resources from ranges");
- return err;
+ goto out_release_gpios;
}
setup_cm_memory_region(pcie);
@@ -699,16 +709,19 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pcie_request_resources(pcie, &res);
if (err) {
dev_err(dev, "Error requesting resources\n");
- return err;
+ goto out_release_gpios;
}
err = mt7621_pcie_register_host(bridge, &res);
if (err) {
dev_err(dev, "Error registering host\n");
- return err;
+ goto out_release_gpios;
}
- return 0;
+out_release_gpios:
+ mt7621_pcie_release_gpios(pcie);
+
+ return err;
}
static const struct of_device_id mt7621_pci_ids[] = {
|
