1 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/clk-provider.h>
9 #include <linux/delay.h>
20 	readl_relaxed(gate->clk_base + (gate->regs->enb_reg))
22 	writel_relaxed(val, gate->clk_base + (gate->regs->enb_set_reg))
24 	writel_relaxed(val, gate->clk_base + (gate->regs->enb_clr_reg))
27 	readl_relaxed(gate->clk_base + (gate->regs->rst_reg))
29 	writel_relaxed(val, gate->clk_base + (gate->regs->rst_clr_reg))
31 #define periph_clk_to_bit(gate) (1 << (gate->clk_num % 32))
44 	if (!(gate->flags & TEGRA_PERIPH_NO_RESET))  in clk_periph_is_enabled()
58 	if (!(gate->flags & TEGRA_PERIPH_NO_RESET) &&  in clk_periph_enable_locked()
59 	    !(gate->flags & TEGRA_PERIPH_MANUAL_RESET)) {  in clk_periph_enable_locked()
61 			udelay(5); /* reset propogation delay */  in clk_periph_enable_locked()
66 	if (gate->flags & TEGRA_PERIPH_WAR_1005168) {  in clk_periph_enable_locked()
67 		writel_relaxed(0, gate->clk_base + LVL2_CLK_GATE_OVRE);  in clk_periph_enable_locked()
68 		writel_relaxed(BIT(22), gate->clk_base + LVL2_CLK_GATE_OVRE);  in clk_periph_enable_locked()
70 		writel_relaxed(0, gate->clk_base + LVL2_CLK_GATE_OVRE);  in clk_periph_enable_locked()
83 	if (gate->flags & TEGRA_PERIPH_ON_APB)  in clk_periph_disable_locked()
96 	if (!gate->enable_refcnt[gate->clk_num]++)  in clk_periph_enable()
111 	WARN_ON(!gate->enable_refcnt[gate->clk_num]);  in clk_periph_disable()
113 	if (--gate->enable_refcnt[gate->clk_num] == 0)  in clk_periph_disable()
129 	 * be non-zero here if the "unused" duplicate is disabled by CCF.  in clk_periph_disable_unused()
131 	if (!gate->enable_refcnt[gate->clk_num])  in clk_periph_disable_unused()
150 	struct clk_init_data init;  in tegra_clk_register_periph_gate()  local
155 		return ERR_PTR(-EINVAL);  in tegra_clk_register_periph_gate()
160 		return ERR_PTR(-ENOMEM);  in tegra_clk_register_periph_gate()
163 	init.name = name;  in tegra_clk_register_periph_gate()
164 	init.flags = flags;  in tegra_clk_register_periph_gate()
165 	init.parent_names = parent_name ? &parent_name : NULL;  in tegra_clk_register_periph_gate()
166 	init.num_parents = parent_name ? 1 : 0;  in tegra_clk_register_periph_gate()
167 	init.ops = &tegra_clk_periph_gate_ops;  in tegra_clk_register_periph_gate()
169 	gate->magic = TEGRA_CLK_PERIPH_GATE_MAGIC;  in tegra_clk_register_periph_gate()
170 	gate->clk_base = clk_base;  in tegra_clk_register_periph_gate()
171 	gate->clk_num = clk_num;  in tegra_clk_register_periph_gate()
172 	gate->flags = gate_flags;  in tegra_clk_register_periph_gate()
173 	gate->enable_refcnt = enable_refcnt;  in tegra_clk_register_periph_gate()
174 	gate->regs = pregs;  in tegra_clk_register_periph_gate()
176 	/* Data in .init is copied by clk_register(), so stack variable OK */  in tegra_clk_register_periph_gate()
177 	gate->hw.init = &init;  in tegra_clk_register_periph_gate()
179 	clk = clk_register(NULL, &gate->hw);  in tegra_clk_register_periph_gate()