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soc/tegra: fuse: Set up in early initcall

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Rather than rely on explicit initialization order called from SoC setup
code, use a plain initcall and rely on initcall ordering to take care of
dependencies.

This driver exposes some functionality (querying the chip ID) needed at
very early stages of the boot process. An early initcall is good enough
provided that some of the dependencies are deferred to later stages. To
make sure any abuses are easily caught, output a warning message if the
chip ID is queried while it can't be read yet.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2014-07-11 11:13:30 +02:00
parent c090e11163
commit 24fa5af810
4 changed files with 14 additions and 6 deletions
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11
drivers/soc/tegra/fuse/fuse-tegra.c
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@@ -23,6 +23,7 @@
#include <linux/of_address.h>
#include <linux/io.h>
#include <soc/tegra/common.h>
#include <soc/tegra/fuse.h>
#include "fuse.h"
@@ -125,11 +126,14 @@ int tegra_fuse_create_sysfs(struct device *dev, int size,
return device_create_bin_file(dev, &fuse_bin_attr);
}
void __init tegra_init_fuse(void)
static int __init tegra_init_fuse(void)
{
struct device_node *np;
void __iomem *car_base;
if (!soc_is_tegra())
return 0;
tegra_init_apbmisc();
np = of_find_matching_node(NULL, car_match);
@@ -139,7 +143,7 @@ void __init tegra_init_fuse(void)
iounmap(car_base);
} else {
pr_err("Could not enable fuse clk. ioremap tegra car failed.\n");
return;
return -ENXIO;
}
if (tegra_get_chip_id() == TEGRA20)
@@ -153,4 +157,7 @@ void __init tegra_init_fuse(void)
tegra_sku_info.core_process_id);
pr_debug("Tegra CPU Speedo ID %d, Soc Speedo ID %d\n",
tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id);
return 0;
}
early_initcall(tegra_init_fuse);