1 // SPDX-License-Identifier: GPL-2.0-only
6  * Clock driver for Exynos clock output
11 #include <linux/clk-provider.h>
53 		.compatible = "samsung,exynos3250-pmu",
56 		.compatible = "samsung,exynos4210-pmu",
59 		.compatible = "samsung,exynos4212-pmu",
62 		.compatible = "samsung,exynos4412-pmu",
65 		.compatible = "samsung,exynos5250-pmu",
68 		.compatible = "samsung,exynos5410-pmu",
71 		.compatible = "samsung,exynos5420-pmu",
74 		.compatible = "samsung,exynos5433-pmu",
89 	if (!dev->parent) {  in exynos_clkout_match_parent_dev()
91 		return -EINVAL;  in exynos_clkout_match_parent_dev()
94 	match = of_match_device(exynos_clkout_ids, dev->parent);  in exynos_clkout_match_parent_dev()
97 		return -EINVAL;  in exynos_clkout_match_parent_dev()
99 	variant = match->data;  in exynos_clkout_match_parent_dev()
101 	*mux_mask = variant->mux_mask;  in exynos_clkout_match_parent_dev()
114 	clkout = devm_kzalloc(&pdev->dev,  in exynos_clkout_probe()
118 		return -ENOMEM;  in exynos_clkout_probe()
120 	ret = exynos_clkout_match_parent_dev(&pdev->dev, &mux_mask);  in exynos_clkout_probe()
124 	clkout->np = pdev->dev.of_node;  in exynos_clkout_probe()
125 	if (!clkout->np) {  in exynos_clkout_probe()
127 		 * pdev->dev.parent was checked by exynos_clkout_match_parent_dev()  in exynos_clkout_probe()
130 		clkout->np = pdev->dev.parent->of_node;  in exynos_clkout_probe()
135 	spin_lock_init(&clkout->slock);  in exynos_clkout_probe()
142 		parents[i] = of_clk_get_by_name(clkout->np, name);  in exynos_clkout_probe()
153 		return -EINVAL;  in exynos_clkout_probe()
155 	clkout->reg = of_iomap(clkout->np, 0);  in exynos_clkout_probe()
156 	if (!clkout->reg) {  in exynos_clkout_probe()
157 		ret = -ENODEV;  in exynos_clkout_probe()
161 	clkout->gate.reg = clkout->reg + EXYNOS_PMU_DEBUG_REG;  in exynos_clkout_probe()
162 	clkout->gate.bit_idx = EXYNOS_CLKOUT_DISABLE_SHIFT;  in exynos_clkout_probe()
163 	clkout->gate.flags = CLK_GATE_SET_TO_DISABLE;  in exynos_clkout_probe()
164 	clkout->gate.lock = &clkout->slock;  in exynos_clkout_probe()
166 	clkout->mux.reg = clkout->reg + EXYNOS_PMU_DEBUG_REG;  in exynos_clkout_probe()
167 	clkout->mux.mask = mux_mask;  in exynos_clkout_probe()
168 	clkout->mux.shift = EXYNOS_CLKOUT_MUX_SHIFT;  in exynos_clkout_probe()
169 	clkout->mux.lock = &clkout->slock;  in exynos_clkout_probe()
171 	clkout->data.hws[0] = clk_hw_register_composite(NULL, "clkout",  in exynos_clkout_probe()
172 				parent_names, parent_count, &clkout->mux.hw,  in exynos_clkout_probe()
173 				&clk_mux_ops, NULL, NULL, &clkout->gate.hw,  in exynos_clkout_probe()
176 	if (IS_ERR(clkout->data.hws[0])) {  in exynos_clkout_probe()
177 		ret = PTR_ERR(clkout->data.hws[0]);  in exynos_clkout_probe()
181 	clkout->data.num = EXYNOS_CLKOUT_NR_CLKS;  in exynos_clkout_probe()
182 	ret = of_clk_add_hw_provider(clkout->np, of_clk_hw_onecell_get, &clkout->data);  in exynos_clkout_probe()
189 	clk_hw_unregister(clkout->data.hws[0]);  in exynos_clkout_probe()
191 	iounmap(clkout->reg);  in exynos_clkout_probe()
197 	dev_err(&pdev->dev, "failed to register clkout clock\n");  in exynos_clkout_probe()
206 	of_clk_del_provider(clkout->np);  in exynos_clkout_remove()
207 	clk_hw_unregister(clkout->data.hws[0]);  in exynos_clkout_remove()
208 	iounmap(clkout->reg);  in exynos_clkout_remove()
215 	clkout->pmu_debug_save = readl(clkout->reg + EXYNOS_PMU_DEBUG_REG);  in exynos_clkout_suspend()
224 	writel(clkout->pmu_debug_save, clkout->reg + EXYNOS_PMU_DEBUG_REG);  in exynos_clkout_resume()
234 		.name = "exynos-clkout",
245 MODULE_DESCRIPTION("Samsung Exynos clock output driver");