1 // SPDX-License-Identifier: GPL-2.0
3  * JZ47xx SoCs TCU Operating System Timer driver
11 #include <linux/mfd/ingenic-tcu.h>
25  * The TCU_REG_OST_CNT{L,R} from <linux/mfd/ingenic-tcu.h> are only for the
47 	return readl(ingenic_ost->regs + OST_REG_CNTL);  in ingenic_ost_read_cntl()
53 	return readl(ingenic_ost->regs + OST_REG_CNTH);  in ingenic_ost_read_cnth()
69 	struct device *dev = &pdev->dev;  in ingenic_ost_probe()
78 		return -EINVAL;  in ingenic_ost_probe()
82 		return -ENOMEM;  in ingenic_ost_probe()
86 	ost->regs = devm_platform_ioremap_resource(pdev, 0);  in ingenic_ost_probe()
87 	if (IS_ERR(ost->regs))  in ingenic_ost_probe()
88 		return PTR_ERR(ost->regs);  in ingenic_ost_probe()
90 	map = device_node_to_regmap(dev->parent->of_node);  in ingenic_ost_probe()
96 	ost->clk = devm_clk_get_enabled(dev, "ost");  in ingenic_ost_probe()
97 	if (IS_ERR(ost->clk))  in ingenic_ost_probe()
98 		return PTR_ERR(ost->clk);  in ingenic_ost_probe()
101 	if (soc_info->is64bit)  in ingenic_ost_probe()
109 	rate = clk_get_rate(ost->clk);  in ingenic_ost_probe()
111 	/* Enable OST TCU channel */  in ingenic_ost_probe()
114 	cs = &ost->cs;  in ingenic_ost_probe()
115 	cs->name	= "ingenic-ost";  in ingenic_ost_probe()
116 	cs->rating	= 320;  in ingenic_ost_probe()
117 	cs->flags	= CLOCK_SOURCE_IS_CONTINUOUS;  in ingenic_ost_probe()
118 	cs->mask	= CLOCKSOURCE_MASK(32);  in ingenic_ost_probe()
120 	if (soc_info->is64bit)  in ingenic_ost_probe()
121 		cs->read = ingenic_ost_clocksource_readl;  in ingenic_ost_probe()
123 		cs->read = ingenic_ost_clocksource_readh;  in ingenic_ost_probe()
131 	if (soc_info->is64bit)  in ingenic_ost_probe()
143 	clk_disable(ost->clk);  in ingenic_ost_suspend()
152 	return clk_enable(ost->clk);  in ingenic_ost_resume()
170 	{ .compatible = "ingenic,jz4725b-ost", .data = &jz4725b_ost_soc_info, },
171 	{ .compatible = "ingenic,jz4760b-ost", .data = &jz4760b_ost_soc_info, },
172 	{ .compatible = "ingenic,jz4770-ost", .data = &jz4760b_ost_soc_info, },
178 		.name = "ingenic-ost",