Release 4.7 arch/arm/mach-imx/cpu-imx5.c

/*
 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 *
 * This file contains the CPU initialization code.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>

#include "hardware.h"
#include "common.h"


static int mx5_cpu_rev = -1;


#define IIM_SREV 0x24



static u32 imx5_read_srev_reg(const char *compat)
{
	void __iomem *iim_base;
	struct device_node *np;
	u32 srev;

	np = of_find_compatible_node(NULL, NULL, compat);
	iim_base = of_iomap(np, 0);
	WARN_ON(!iim_base);

	srev = readl(iim_base + IIM_SREV) & 0xff;

	iounmap(iim_base);

	return srev;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
shawn guo
shawn guo
51
73.91%
1
33.33%
sascha hauer
sascha hauer
13
18.84%
1
33.33%
dinh nguyen
dinh nguyen
5
7.25%
1
33.33%
Total
69
100.00%
3
100.00%



static int get_mx51_srev(void)
{
	u32 rev = imx5_read_srev_reg("fsl,imx51-iim");

	switch (rev) {
	case 0x0:
		return IMX_CHIP_REVISION_2_0;
	case 0x10:
		return IMX_CHIP_REVISION_3_0;
	default:
		return IMX_CHIP_REVISION_UNKNOWN;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
shawn guo
shawn guo
14
36.84%
1
25.00%
jason liu
jason liu
10
26.32%
1
25.00%
dinh nguyen
dinh nguyen
9
23.68%
1
25.00%
sascha hauer
sascha hauer
5
13.16%
1
25.00%
Total
38
100.00%
4
100.00%

/*
 * Returns:
 *      the silicon revision of the cpu
 *      -EINVAL - not a mx51
 */


int mx51_revision(void)
{
	if (!cpu_is_mx51())
		return -EINVAL;

	if (mx5_cpu_rev == -1)
		mx5_cpu_rev = get_mx51_srev();

	return mx5_cpu_rev;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
sascha hauer
sascha hauer
27
84.38%
1
33.33%
jason liu
jason liu
3
9.38%
1
33.33%
dinh nguyen
dinh nguyen
2
6.25%
1
33.33%
Total
32
100.00%
3
100.00%


EXPORT_SYMBOL(mx51_revision);

#ifdef CONFIG_NEON

/*
 * All versions of the silicon before Rev. 3 have broken NEON implementations.
 * Dependent on link order - so the assumption is that vfp_init is called
 * before us.
 */


int __init mx51_neon_fixup(void)
{
	if (mx51_revision() < IMX_CHIP_REVISION_3_0 &&
			(elf_hwcap & HWCAP_NEON)) {
		elf_hwcap &= ~HWCAP_NEON;
		pr_info("Turning off NEON support, detected broken NEON implementation\n");
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
amit kucheria
amit kucheria
35
97.22%
1
50.00%
dinh nguyen
dinh nguyen
1
2.78%
1
50.00%
Total
36
100.00%
2
100.00%

#endif



static int get_mx53_srev(void)
{
	u32 rev = imx5_read_srev_reg("fsl,imx53-iim");

	switch (rev) {
	case 0x0:
		return IMX_CHIP_REVISION_1_0;
	case 0x2:
		return IMX_CHIP_REVISION_2_0;
	case 0x3:
		return IMX_CHIP_REVISION_2_1;
	default:
		return IMX_CHIP_REVISION_UNKNOWN;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dinh nguyen
dinh nguyen
25
56.82%
1
33.33%
richard zhao
richard zhao
17
38.64%
1
33.33%
shawn guo
shawn guo
2
4.55%
1
33.33%
Total
44
100.00%
3
100.00%

/*
 * Returns:
 *      the silicon revision of the cpu
 *      -EINVAL - not a mx53
 */


int mx53_revision(void)
{
	if (!cpu_is_mx53())
		return -EINVAL;

	if (mx5_cpu_rev == -1)
		mx5_cpu_rev = get_mx53_srev();

	return mx5_cpu_rev;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
dinh nguyen
dinh nguyen
29
90.62%
2
66.67%
jason liu
jason liu
3
9.38%
1
33.33%
Total
32
100.00%
3
100.00%


EXPORT_SYMBOL(mx53_revision);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
dinh nguyen
dinh nguyen
80
25.97%
2
20.00%
shawn guo
shawn guo
75
24.35%
2
20.00%
sascha hauer
sascha hauer
62
20.13%
1
10.00%
amit kucheria
amit kucheria
54
17.53%
2
20.00%
jason liu
jason liu
17
5.52%
1
10.00%
richard zhao
richard zhao
17
5.52%
1
10.00%
fabio estevam
fabio estevam
3
0.97%
1
10.00%
Total
308
100.00%
10
100.00%
  
Directory: arch/arm/mach-imx

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.