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