1 // SPDX-License-Identifier: GPL-2.0-or-later
5  *  Copyright (C) 2000-2003 Deep Blue Solutions Ltd.
19 #include <linux/clk.h>
24 #define KMI_BASE	(kmi->base)
28 	struct clk		*clk;  member
42 		serio_interrupt(kmi->io, readb(KMIDATA), 0);  in amba_kmi_int()
52 	struct amba_kmi_port *kmi = io->port_data;  in amba_kmi_write()
55 	while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && --timeleft)  in amba_kmi_write()
66 	struct amba_kmi_port *kmi = io->port_data;  in amba_kmi_open()
70 	ret = clk_prepare_enable(kmi->clk);  in amba_kmi_open()
72 		goto out;  in amba_kmi_open()
74 	divisor = clk_get_rate(kmi->clk) / 8000000 - 1;  in amba_kmi_open()
78 	ret = request_irq(kmi->irq, amba_kmi_int, IRQF_SHARED, "kmi-pl050",  in amba_kmi_open()
81 		printk(KERN_ERR "kmi: failed to claim IRQ%d\n", kmi->irq);  in amba_kmi_open()
91 	clk_disable_unprepare(kmi->clk);  in amba_kmi_open()
92  out:  in amba_kmi_open()
98 	struct amba_kmi_port *kmi = io->port_data;  in amba_kmi_close()
102 	free_irq(kmi->irq, kmi);  in amba_kmi_close()
103 	clk_disable_unprepare(kmi->clk);  in amba_kmi_close()
120 		ret = -ENOMEM;  in amba_kmi_probe()
121 		goto out;  in amba_kmi_probe()
125 	io->id.type	= SERIO_8042;  in amba_kmi_probe()
126 	io->write	= amba_kmi_write;  in amba_kmi_probe()
127 	io->open	= amba_kmi_open;  in amba_kmi_probe()
128 	io->close	= amba_kmi_close;  in amba_kmi_probe()
129 	strlcpy(io->name, dev_name(&dev->dev), sizeof(io->name));  in amba_kmi_probe()
130 	strlcpy(io->phys, dev_name(&dev->dev), sizeof(io->phys));  in amba_kmi_probe()
131 	io->port_data	= kmi;  in amba_kmi_probe()
132 	io->dev.parent	= &dev->dev;  in amba_kmi_probe()
134 	kmi->io		= io;  in amba_kmi_probe()
135 	kmi->base	= ioremap(dev->res.start, resource_size(&dev->res));  in amba_kmi_probe()
136 	if (!kmi->base) {  in amba_kmi_probe()
137 		ret = -ENOMEM;  in amba_kmi_probe()
138 		goto out;  in amba_kmi_probe()
141 	kmi->clk = clk_get(&dev->dev, "KMIREFCLK");  in amba_kmi_probe()
142 	if (IS_ERR(kmi->clk)) {  in amba_kmi_probe()
143 		ret = PTR_ERR(kmi->clk);  in amba_kmi_probe()
147 	kmi->irq = dev->irq[0];  in amba_kmi_probe()
150 	serio_register_port(kmi->io);  in amba_kmi_probe()
154 	iounmap(kmi->base);  in amba_kmi_probe()
155  out:  in amba_kmi_probe()
166 	serio_unregister_port(kmi->io);  in amba_kmi_remove()
167 	clk_put(kmi->clk);  in amba_kmi_remove()
168 	iounmap(kmi->base);  in amba_kmi_remove()
178 	serio_reconnect(kmi->io);  in amba_kmi_resume()
197 		.name	= "kmi-pl050",