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263291fa44
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it was merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: Sam Ravnborg <sam@ravnborg.org> Link: https://lore.kernel.org/all/20230718143211.1066810-1-robh@kernel.org/ Signed-off-by: Rob Herring <robh@kernel.org>
151 lines
3.1 KiB
C
151 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* auxio.c: Probing for the Sparc AUXIO register at boot time.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*
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* Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <asm/prom.h>
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#include <asm/io.h>
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#include <asm/auxio.h>
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void __iomem *auxio_register = NULL;
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EXPORT_SYMBOL(auxio_register);
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enum auxio_type {
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AUXIO_TYPE_NODEV,
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AUXIO_TYPE_SBUS,
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AUXIO_TYPE_EBUS
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};
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static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
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static DEFINE_SPINLOCK(auxio_lock);
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static void __auxio_rmw(u8 bits_on, u8 bits_off, int ebus)
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{
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if (auxio_register) {
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unsigned long flags;
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u8 regval, newval;
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spin_lock_irqsave(&auxio_lock, flags);
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regval = (ebus ?
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(u8) readl(auxio_register) :
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sbus_readb(auxio_register));
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newval = regval | bits_on;
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newval &= ~bits_off;
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if (!ebus)
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newval &= ~AUXIO_AUX1_MASK;
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if (ebus)
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writel((u32) newval, auxio_register);
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else
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sbus_writeb(newval, auxio_register);
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spin_unlock_irqrestore(&auxio_lock, flags);
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}
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}
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static void __auxio_set_bit(u8 bit, int on, int ebus)
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{
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u8 bits_on = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
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u8 bits_off = 0;
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if (!on) {
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u8 tmp = bits_off;
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bits_off = bits_on;
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bits_on = tmp;
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}
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__auxio_rmw(bits_on, bits_off, ebus);
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}
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void auxio_set_led(int on)
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{
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int ebus = auxio_devtype == AUXIO_TYPE_EBUS;
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u8 bit;
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bit = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
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__auxio_set_bit(bit, on, ebus);
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}
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EXPORT_SYMBOL(auxio_set_led);
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static void __auxio_sbus_set_lte(int on)
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{
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__auxio_set_bit(AUXIO_AUX1_LTE, on, 0);
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}
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void auxio_set_lte(int on)
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{
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switch(auxio_devtype) {
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case AUXIO_TYPE_SBUS:
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__auxio_sbus_set_lte(on);
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break;
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case AUXIO_TYPE_EBUS:
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default:
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break;
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}
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}
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EXPORT_SYMBOL(auxio_set_lte);
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static const struct of_device_id auxio_match[] = {
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{
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.name = "auxio",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, auxio_match);
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static int auxio_probe(struct platform_device *dev)
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{
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struct device_node *dp = dev->dev.of_node;
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unsigned long size;
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if (of_node_name_eq(dp->parent, "ebus")) {
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auxio_devtype = AUXIO_TYPE_EBUS;
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size = sizeof(u32);
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} else if (of_node_name_eq(dp->parent, "sbus")) {
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auxio_devtype = AUXIO_TYPE_SBUS;
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size = 1;
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} else {
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printk("auxio: Unknown parent bus type [%pOFn]\n",
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dp->parent);
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return -ENODEV;
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}
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auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
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if (!auxio_register)
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return -ENODEV;
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printk(KERN_INFO "AUXIO: Found device at %pOF\n", dp);
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if (auxio_devtype == AUXIO_TYPE_EBUS)
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auxio_set_led(AUXIO_LED_ON);
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return 0;
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}
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static struct platform_driver auxio_driver = {
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.probe = auxio_probe,
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.driver = {
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.name = "auxio",
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.of_match_table = auxio_match,
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},
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};
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static int __init auxio_init(void)
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{
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return platform_driver_register(&auxio_driver);
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}
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/* Must be after subsys_initcall() so that busses are probed. Must
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* be before device_initcall() because things like the floppy driver
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* need to use the AUXIO register.
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*/
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fs_initcall(auxio_init);
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