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soc/tegra: fuse: Add FUSE clock check in tegra_fuse_readl()

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tegra_fuse_readl() can be called from drivers at any time. If this API
is called before tegra_fuse_probe(), we end up enabling the clock before
it is registered. Add a check for the FUSE clock in tegra_fuse_readl()
and propagate any errors.

Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Nagarjuna Kristam 2019-09-03 16:26:52 +05:30 committed by Thierry Reding
parent 54ecb8f702
commit 0a728e0bda
1 changed files with 4 additions and 1 deletions
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5
drivers/soc/tegra/fuse/fuse-tegra.c
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@ -186,9 +186,12 @@ u32 __init tegra_fuse_read_early(unsigned int offset)
int tegra_fuse_readl(unsigned long offset, u32 *value) int tegra_fuse_readl(unsigned long offset, u32 *value)
{ {
if (!fuse->read) if (!fuse->read || !fuse->clk)
return -EPROBE_DEFER; return -EPROBE_DEFER;
if (IS_ERR(fuse->clk))
return PTR_ERR(fuse->clk);
*value = fuse->read(fuse, offset); *value = fuse->read(fuse, offset);
return 0; return 0;