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authorJason Liu <jason.hui@linaro.org>2011-08-26 07:35:19 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2011-08-26 08:50:58 +0200
commitd27536c6619221528114746317def345467a3e80 (patch)
tree1387ede4d6cdd306361b33c4954540fd1727b4c3
parentARM: imx: Introduce generic function for displaying silicon revision (diff)
downloadlinux-d27536c6619221528114746317def345467a3e80.tar.xz
linux-d27536c6619221528114746317def345467a3e80.zip
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>
-rw-r--r--arch/arm/mach-imx/Makefile2
-rw-r--r--arch/arm/mach-imx/clock-imx25.c6
-rw-r--r--arch/arm/mach-imx/cpu-imx25.c41
-rw-r--r--arch/arm/plat-mxc/include/mach/mx25.h4
4 files changed, 52 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index e9eb36dad888..0a5332c694bd 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -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
diff --git a/arch/arm/mach-imx/clock-imx25.c b/arch/arm/mach-imx/clock-imx25.c
index e63e23504fe5..b0fec74c8c91 100644
--- a/arch/arm/mach-imx/clock-imx25.c
+++ b/arch/arm/mach-imx/clock-imx25.c
@@ -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;
diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c
new file mode 100644
index 000000000000..6914bcbf84e4
--- /dev/null
+++ b/arch/arm/mach-imx/cpu-imx25.c
@@ -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);
diff --git a/arch/arm/plat-mxc/include/mach/mx25.h b/arch/arm/plat-mxc/include/mach/mx25.h
index 087cd7ac8d52..8dcab80acff3 100644
--- a/arch/arm/plat-mxc/include/mach/mx25.h
+++ b/arch/arm/plat-mxc/include/mach/mx25.h
@@ -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__ */