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clk: sprd: set max_register according to mapping range
In sprd clock driver, regmap_config.max_register was set to a fixed value
which is likely larger than the address range configured in device tree,
when reading registers through debugfs it would cause access violation.
Fixes: d41f59fd92
("clk: sprd: Add common infrastructure")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20230316023624.758204-1-chunyan.zhang@unisoc.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
parent
5cf9d015be
commit
47d4308653
1 changed files with 6 additions and 3 deletions
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@ -17,7 +17,6 @@ static const struct regmap_config sprdclk_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 32,
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.max_register = 0xffff,
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.fast_io = true,
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};
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@ -43,6 +42,8 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
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struct device *dev = &pdev->dev;
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struct device_node *node = dev->of_node, *np;
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struct regmap *regmap;
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struct resource *res;
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struct regmap_config reg_config = sprdclk_regmap_config;
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if (of_find_property(node, "sprd,syscon", NULL)) {
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regmap = syscon_regmap_lookup_by_phandle(node, "sprd,syscon");
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@ -59,12 +60,14 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
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return PTR_ERR(regmap);
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}
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} else {
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base = devm_platform_ioremap_resource(pdev, 0);
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base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
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if (IS_ERR(base))
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return PTR_ERR(base);
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reg_config.max_register = resource_size(res) - reg_config.reg_stride;
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regmap = devm_regmap_init_mmio(&pdev->dev, base,
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&sprdclk_regmap_config);
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®_config);
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if (IS_ERR(regmap)) {
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pr_err("failed to init regmap\n");
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return PTR_ERR(regmap);
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