bcm53xx: add support for the PCIe controller
[openwrt/svn-archive/archive.git] / target / linux / bcm53xx / patches-3.14 / 123-bcma-get-sprom-from-devicetree.patch
1 From 5d94449a92e4121b408e7cb8931a47984135eeea Mon Sep 17 00:00:00 2001
2 From: Hauke Mehrtens <hauke@hauke-m.de>
3 Date: Sun, 4 May 2014 14:34:31 +0200
4 Subject: [PATCH 07/15] bcma: get sprom from devicetree
5
6 This patch make it possible to device an sprom provider in device tree
7 and get the sprom from this driver. Every time there is such a provider
8 it gets asked for a sprom.
9
10 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
11 ---
12 drivers/bcma/sprom.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
13 1 file changed, 50 insertions(+), 1 deletion(-)
14
15 --- a/drivers/bcma/sprom.c
16 +++ b/drivers/bcma/sprom.c
17 @@ -15,6 +15,8 @@
18 #include <linux/io.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/slab.h>
21 +#include <linux/of.h>
22 +#include <linux/of_platform.h>
23
24 static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out);
25
26 @@ -46,6 +48,46 @@ int bcma_arch_register_fallback_sprom(in
27 return 0;
28 }
29
30 +#ifdef CONFIG_OF
31 +static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
32 + struct ssb_sprom *out)
33 +{
34 + const phandle *handle;
35 + struct device_node *sprom_node;
36 + struct platform_device *sprom_dev;
37 + struct ssb_sprom *sprom;
38 +
39 + if (!bus->host_pdev || !bus->host_pdev->dev.of_node)
40 + return -ENOENT;
41 +
42 + handle = of_get_property(bus->host_pdev->dev.of_node, "sprom", NULL);
43 + if (!handle)
44 + return -ENOENT;
45 +
46 + sprom_node = of_find_node_by_phandle(be32_to_cpup(handle));
47 + if (!sprom_node)
48 + return -ENOENT;
49 +
50 + sprom_dev = of_find_device_by_node(sprom_node);
51 + if (!sprom_dev)
52 + return -ENOENT;
53 +
54 + sprom = platform_get_drvdata(sprom_dev);
55 + if (!sprom)
56 + return -ENOENT;
57 +
58 + memcpy(out, sprom, sizeof(*out));
59 +
60 + return 0;
61 +}
62 +#else
63 +static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
64 + struct ssb_sprom *out)
65 +{
66 + return -ENOENT;
67 +}
68 +#endif
69 +
70 static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus,
71 struct ssb_sprom *out)
72 {
73 @@ -553,7 +595,14 @@ int bcma_sprom_get(struct bcma_bus *bus)
74 u16 *sprom;
75 size_t sprom_sizes[] = { SSB_SPROMSIZE_WORDS_R4,
76 SSB_SPROMSIZE_WORDS_R10, };
77 - int i, err = 0;
78 + int i, err;
79 +
80 + err = bcma_fill_sprom_with_dt(bus, &bus->sprom);
81 + if (err == 0) {
82 + bcma_info(bus, "Found sprom from device tree provider\n");
83 + return 0;
84 + }
85 + err = 0;
86
87 if (!bus->drv_cc.core)
88 return -EOPNOTSUPP;