diff options
| author | Jason Liu <jason.hui@linaro.org> | 2011-08-26 13:35:19 +0800 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-08-26 08:50:58 +0200 |
| commit | d27536c6619221528114746317def345467a3e80 (patch) | |
| tree | 1387ede4d6cdd306361b33c4954540fd1727b4c3 /arch/arm/mach-imx | |
| parent | 059e58f6f3db8f563c7fef860b69c4e148f397ae (diff) | |
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>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-imx/clock-imx25.c | 6 | ||||
| -rw-r--r-- | arch/arm/mach-imx/cpu-imx25.c | 41 |
3 files changed, 48 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); |