1 // SPDX-License-Identifier: GPL-2.0-only
7  * Tero Kristo <t-kristo@ti.com>
10 #include <linux/clk-provider.h>
15 #include <linux/clk/ti.h>
32  * we have some non-atomic read/write
39 static int _omap2_clk_deny_idle(struct clk_hw_omap *clk)  in _omap2_clk_deny_idle()  argument
41 	if (clk->ops && clk->ops->deny_idle) {  in _omap2_clk_deny_idle()
45 		clk->autoidle_count++;  in _omap2_clk_deny_idle()
46 		if (clk->autoidle_count == 1)  in _omap2_clk_deny_idle()
47 			clk->ops->deny_idle(clk);  in _omap2_clk_deny_idle()
54 static int _omap2_clk_allow_idle(struct clk_hw_omap *clk)  in _omap2_clk_allow_idle()  argument
56 	if (clk->ops && clk->ops->allow_idle) {  in _omap2_clk_allow_idle()
60 		clk->autoidle_count--;  in _omap2_clk_allow_idle()
61 		if (clk->autoidle_count == 0)  in _omap2_clk_allow_idle()
62 			clk->ops->allow_idle(clk);  in _omap2_clk_allow_idle()
70  * omap2_clk_deny_idle - disable autoidle on an OMAP clock
71  * @clk: struct clk * to disable autoidle for
75 int omap2_clk_deny_idle(struct clk *clk)  in omap2_clk_deny_idle()  argument
79 	if (!clk)  in omap2_clk_deny_idle()
80 		return -EINVAL;  in omap2_clk_deny_idle()
82 	hw = __clk_get_hw(clk);  in omap2_clk_deny_idle()
90 	return -EINVAL;  in omap2_clk_deny_idle()
94  * omap2_clk_allow_idle - enable autoidle on an OMAP clock
95  * @clk: struct clk * to enable autoidle for
99 int omap2_clk_allow_idle(struct clk *clk)  in omap2_clk_allow_idle()  argument
103 	if (!clk)  in omap2_clk_allow_idle()
104 		return -EINVAL;  in omap2_clk_allow_idle()
106 	hw = __clk_get_hw(clk);  in omap2_clk_allow_idle()
114 	return -EINVAL;  in omap2_clk_allow_idle()
117 static void _allow_autoidle(struct clk_ti_autoidle *clk)  in _allow_autoidle()  argument
121 	val = ti_clk_ll_ops->clk_readl(&clk->reg);  in _allow_autoidle()
123 	if (clk->flags & AUTOIDLE_LOW)  in _allow_autoidle()
124 		val &= ~(1 << clk->shift);  in _allow_autoidle()
126 		val |= (1 << clk->shift);  in _allow_autoidle()
128 	ti_clk_ll_ops->clk_writel(val, &clk->reg);  in _allow_autoidle()
131 static void _deny_autoidle(struct clk_ti_autoidle *clk)  in _deny_autoidle()  argument
135 	val = ti_clk_ll_ops->clk_readl(&clk->reg);  in _deny_autoidle()
137 	if (clk->flags & AUTOIDLE_LOW)  in _deny_autoidle()
138 		val |= (1 << clk->shift);  in _deny_autoidle()
140 		val &= ~(1 << clk->shift);  in _deny_autoidle()
142 	ti_clk_ll_ops->clk_writel(val, &clk->reg);  in _deny_autoidle()
146  * _clk_generic_allow_autoidle_all - enable autoidle for all clocks
160  * _clk_generic_deny_autoidle_all - disable autoidle for all clocks
174  * of_ti_clk_autoidle_setup - sets up hardware autoidle for a clock
178  * for presence of 'ti,autoidle-shift' property in the device tree
187 	struct clk_ti_autoidle *clk;  in of_ti_clk_autoidle_setup()  local
191 	if (of_property_read_u32(node, "ti,autoidle-shift", &shift))  in of_ti_clk_autoidle_setup()
194 	clk = kzalloc(sizeof(*clk), GFP_KERNEL);  in of_ti_clk_autoidle_setup()
196 	if (!clk)  in of_ti_clk_autoidle_setup()
197 		return -ENOMEM;  in of_ti_clk_autoidle_setup()
199 	clk->shift = shift;  in of_ti_clk_autoidle_setup()
200 	clk->name = ti_dt_clk_name(node);  in of_ti_clk_autoidle_setup()
201 	ret = ti_clk_get_reg_addr(node, 0, &clk->reg);  in of_ti_clk_autoidle_setup()
203 		kfree(clk);  in of_ti_clk_autoidle_setup()
207 	if (of_property_read_bool(node, "ti,invert-autoidle-bit"))  in of_ti_clk_autoidle_setup()
208 		clk->flags |= AUTOIDLE_LOW;  in of_ti_clk_autoidle_setup()
210 	list_add(&clk->node, &autoidle_clks);  in of_ti_clk_autoidle_setup()
216  * omap2_clk_enable_autoidle_all - enable autoidle on all OMAP clocks that
238  * omap2_clk_disable_autoidle_all - disable autoidle on all OMAP clocks that