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MIPS: OCTEON: Use device tree to probe for flash chips. 

Don't assume they are there, the device tree will tell us.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9461/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
David Daney 2015-03-05 17:31:31 +03:00 committed by Ralf Baechle
parent 8c1e6b14e2
commit 7f481716bc
1 changed files with 37 additions and 5 deletions
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42
arch/mips/cavium-octeon/flash_setup.c
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@ -8,10 +8,11 @@
* Copyright (C) 2007, 2008 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/semaphore.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/of_platform.h>
#include <linux/mtd/partitions.h>
#include <asm/octeon/octeon.h>
@ -66,14 +67,22 @@ static void octeon_flash_map_copy_to(struct map_info *map, unsigned long to,
*
* Returns Zero on success
*/
static int __init flash_init(void)
static int octeon_flash_probe(struct platform_device *pdev)
{
union cvmx_mio_boot_reg_cfgx region_cfg;
u32 cs;
int r;
struct device_node *np = pdev->dev.of_node;
r = of_property_read_u32(np, "reg", &cs);
if (r)
return r;
/*
* Read the bootbus region 0 setup to determine the base
* address of the flash.
*/
union cvmx_mio_boot_reg_cfgx region_cfg;
region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0));
region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
if (region_cfg.s.en) {
/*
* The bootloader always takes the flash and sets its
@ -109,4 +118,27 @@ static int __init flash_init(void)
return 0;
}
late_initcall(flash_init);
static const struct of_device_id of_flash_match[] = {
{
.compatible = "cfi-flash",
},
{ },
};
MODULE_DEVICE_TABLE(of, of_flash_match);
static struct platform_driver of_flash_driver = {
.driver = {
.name = "octeon-of-flash",
.owner = THIS_MODULE,
.of_match_table = of_flash_match,
},
.probe = octeon_flash_probe,
};
static int octeon_flash_init(void)
{
return platform_driver_register(&of_flash_driver);
}
late_initcall(octeon_flash_init);
MODULE_LICENSE("GPL");