diff options
Diffstat (limited to 'drivers/clk/mediatek/clk-cpumux.c')
-rw-r--r-- | drivers/clk/mediatek/clk-cpumux.c | 69 |
1 files changed, 64 insertions, 5 deletions
diff --git a/drivers/clk/mediatek/clk-cpumux.c b/drivers/clk/mediatek/clk-cpumux.c index e188018bc906..c11b3fae622e 100644 --- a/drivers/clk/mediatek/clk-cpumux.c +++ b/drivers/clk/mediatek/clk-cpumux.c @@ -5,13 +5,24 @@ */ #include <linux/clk-provider.h> +#include <linux/container_of.h> +#include <linux/err.h> #include <linux/mfd/syscon.h> #include <linux/module.h> +#include <linux/regmap.h> #include <linux/slab.h> #include "clk-mtk.h" #include "clk-cpumux.h" +struct mtk_clk_cpumux { + struct clk_hw hw; + struct regmap *regmap; + u32 reg; + u32 mask; + u8 shift; +}; + static inline struct mtk_clk_cpumux *to_mtk_clk_cpumux(struct clk_hw *_hw) { return container_of(_hw, struct mtk_clk_cpumux, hw); @@ -77,6 +88,21 @@ mtk_clk_register_cpumux(const struct mtk_composite *mux, return clk; } +static void mtk_clk_unregister_cpumux(struct clk *clk) +{ + struct mtk_clk_cpumux *cpumux; + struct clk_hw *hw; + + hw = __clk_get_hw(clk); + if (!hw) + return; + + cpumux = to_mtk_clk_cpumux(hw); + + clk_unregister(clk); + kfree(cpumux); +} + int mtk_clk_register_cpumuxes(struct device_node *node, const struct mtk_composite *clks, int num, struct clk_onecell_data *clk_data) @@ -87,25 +113,58 @@ int mtk_clk_register_cpumuxes(struct device_node *node, regmap = device_node_to_regmap(node); if (IS_ERR(regmap)) { - pr_err("Cannot find regmap for %pOF: %ld\n", node, - PTR_ERR(regmap)); + pr_err("Cannot find regmap for %pOF: %pe\n", node, regmap); return PTR_ERR(regmap); } for (i = 0; i < num; i++) { const struct mtk_composite *mux = &clks[i]; + if (!IS_ERR_OR_NULL(clk_data->clks[mux->id])) { + pr_warn("%pOF: Trying to register duplicate clock ID: %d\n", + node, mux->id); + continue; + } + clk = mtk_clk_register_cpumux(mux, regmap); if (IS_ERR(clk)) { - pr_err("Failed to register clk %s: %ld\n", - mux->name, PTR_ERR(clk)); - continue; + pr_err("Failed to register clk %s: %pe\n", mux->name, clk); + goto err; } clk_data->clks[mux->id] = clk; } return 0; + +err: + while (--i >= 0) { + const struct mtk_composite *mux = &clks[i]; + + if (IS_ERR_OR_NULL(clk_data->clks[mux->id])) + continue; + + mtk_clk_unregister_cpumux(clk_data->clks[mux->id]); + clk_data->clks[mux->id] = ERR_PTR(-ENOENT); + } + + return PTR_ERR(clk); +} + +void mtk_clk_unregister_cpumuxes(const struct mtk_composite *clks, int num, + struct clk_onecell_data *clk_data) +{ + int i; + + for (i = num; i > 0; i--) { + const struct mtk_composite *mux = &clks[i - 1]; + + if (IS_ERR_OR_NULL(clk_data->clks[mux->id])) + continue; + + mtk_clk_unregister_cpumux(clk_data->clks[mux->id]); + clk_data->clks[mux->id] = ERR_PTR(-ENOENT); + } } MODULE_LICENSE("GPL"); |