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From bd9106f5907080b467026bdaaea979fac8c7badb Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 4 May 2014 14:34:31 +0200
Subject: [PATCH 06/17] bcma: get sprom from devicetree
This patch make it possible to device an sprom provider in device tree
and get the sprom from this driver. Every time there is such a provider
it gets asked for a sprom.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
drivers/bcma/sprom.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)
--- a/drivers/bcma/sprom.c
+++ b/drivers/bcma/sprom.c
@@ -15,6 +15,8 @@
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out);
@@ -46,6 +48,46 @@ int bcma_arch_register_fallback_sprom(in
return 0;
}
+#ifdef CONFIG_OF
+static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
+ struct ssb_sprom *out)
+{
+ const __be32 *handle;
+ struct device_node *sprom_node;
+ struct platform_device *sprom_dev;
+ struct ssb_sprom *sprom;
+
+ if (!bus->host_pdev || !bus->host_pdev->dev.of_node)
+ return -ENOENT;
+
+ handle = of_get_property(bus->host_pdev->dev.of_node, "sprom", NULL);
+ if (!handle)
+ return -ENOENT;
+
+ sprom_node = of_find_node_by_phandle(be32_to_cpup(handle));
+ if (!sprom_node)
+ return -ENOENT;
+
+ sprom_dev = of_find_device_by_node(sprom_node);
+ if (!sprom_dev)
+ return -ENOENT;
+
+ sprom = platform_get_drvdata(sprom_dev);
+ if (!sprom)
+ return -ENOENT;
+
+ memcpy(out, sprom, sizeof(*out));
+
+ return 0;
+}
+#else
+static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
+ struct ssb_sprom *out)
+{
+ return -ENOENT;
+}
+#endif
+
static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus,
struct ssb_sprom *out)
{
@@ -580,7 +622,14 @@ int bcma_sprom_get(struct bcma_bus *bus)
u16 *sprom;
size_t sprom_sizes[] = { SSB_SPROMSIZE_WORDS_R4,
SSB_SPROMSIZE_WORDS_R10, };
- int i, err = 0;
+ int i, err;
+
+ err = bcma_fill_sprom_with_dt(bus, &bus->sprom);
+ if (err == 0) {
+ bcma_info(bus, "Found sprom from device tree provider\n");
+ return 0;
+ }
+ err = 0;
if (!bus->drv_cc.core)
return -EOPNOTSUPP;
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