Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
51 lines
1006 B
C
51 lines
1006 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* MX25 CPU type detection
|
|
*
|
|
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
|
|
* Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include "iim.h"
|
|
#include "hardware.h"
|
|
|
|
static int mx25_cpu_rev = -1;
|
|
|
|
static int mx25_read_cpu_rev(void)
|
|
{
|
|
u32 rev;
|
|
void __iomem *iim_base;
|
|
struct device_node *np;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,imx25-iim");
|
|
iim_base = of_iomap(np, 0);
|
|
of_node_put(np);
|
|
BUG_ON(!iim_base);
|
|
rev = readl(iim_base + MXC_IIMSREV);
|
|
iounmap(iim_base);
|
|
|
|
switch (rev) {
|
|
case 0x00:
|
|
return IMX_CHIP_REVISION_1_0;
|
|
case 0x01:
|
|
return IMX_CHIP_REVISION_1_1;
|
|
case 0x02:
|
|
return IMX_CHIP_REVISION_1_2;
|
|
default:
|
|
return IMX_CHIP_REVISION_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
int mx25_revision(void)
|
|
{
|
|
if (mx25_cpu_rev == -1)
|
|
mx25_cpu_rev = mx25_read_cpu_rev();
|
|
|
|
return mx25_cpu_rev;
|
|
}
|
|
EXPORT_SYMBOL(mx25_revision);
|