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ARM: mx25: Print silicon revision on boot 

Silicon revision is useful information to have during kernel boot.
Print the MX25 silicon revision.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Jason Liu <jason.hui@linaro.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Jason Liu 2011-08-26 13:35:19 +08:00 committed by Sascha Hauer
parent 059e58f6f3
commit d27536c661
4 changed files with 52 additions and 1 deletions
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2
arch/arm/mach-imx/Makefile
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@ -3,7 +3,7 @@ obj-$(CONFIG_IMX_HAVE_DMA_V1) += dma-v1.o
obj-$(CONFIG_ARCH_MX1) += clock-imx1.o mm-imx1.o
obj-$(CONFIG_MACH_MX21) += clock-imx21.o mm-imx21.o
obj-$(CONFIG_ARCH_MX25) += clock-imx25.o mm-imx25.o ehci-imx25.o
obj-$(CONFIG_ARCH_MX25) += clock-imx25.o mm-imx25.o ehci-imx25.o cpu-imx25.o
obj-$(CONFIG_MACH_MX27) += cpu-imx27.o pm-imx27.o
obj-$(CONFIG_MACH_MX27) += clock-imx27.o mm-imx27.o ehci-imx27.o

6
arch/arm/mach-imx/clock-imx25.c
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@ -263,6 +263,7 @@ DEFINE_CLOCK(audmux_clk, 0, CCM_CGCR1, 0, NULL, NULL, NULL);
DEFINE_CLOCK(csi_clk, 0, CCM_CGCR1, 4, get_rate_csi, NULL, &csi_per_clk);
DEFINE_CLOCK(can1_clk, 0, CCM_CGCR1, 2, get_rate_ipg, NULL, NULL);
DEFINE_CLOCK(can2_clk, 1, CCM_CGCR1, 3, get_rate_ipg, NULL, NULL);
DEFINE_CLOCK(iim_clk, 0, CCM_CGCR1, 26, NULL, NULL, NULL);
#define _REGISTER_CLOCK(d, n, c) \
{ \
@ -310,6 +311,7 @@ static struct clk_lookup lookups[] = {
_REGISTER_CLOCK("flexcan.1", NULL, can2_clk)
/* i.mx25 has the i.mx35 type sdma */
_REGISTER_CLOCK("imx35-sdma", NULL, sdma_clk)
_REGISTER_CLOCK(NULL, "iim", iim_clk)
};
int __init mx25_clocks_init(void)
@ -334,6 +336,10 @@ int __init mx25_clocks_init(void)
/* Clock source for gpt is ahb_div */
__raw_writel(__raw_readl(CRM_BASE+0x64) & ~(1 << 5), CRM_BASE + 0x64);
clk_enable(&iim_clk);
imx_print_silicon_rev("i.MX25", mx25_revision());
clk_disable(&iim_clk);
mxc_timer_init(&gpt_clk, MX25_IO_ADDRESS(MX25_GPT1_BASE_ADDR), 54);
return 0;

41
arch/arm/mach-imx/cpu-imx25.c Normal file
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@ -0,0 +1,41 @@
/*
* MX25 CPU type detection
*
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
* Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/module.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/iim.h>
static int mx25_cpu_rev = -1;
static int mx25_read_cpu_rev(void)
{
u32 rev;
rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV));
switch (rev) {
case 0x00:
return IMX_CHIP_REVISION_1_0;
case 0x01:
return IMX_CHIP_REVISION_1_1;
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);

4
arch/arm/plat-mxc/include/mach/mx25.h
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@ -104,4 +104,8 @@
#define MX25_DMA_REQ_SSI1_RX0 28
#define MX25_DMA_REQ_SSI1_TX0 29
#ifndef __ASSEMBLY__
extern int mx25_revision(void);
#endif
#endif /* ifndef __MACH_MX25_H__ */