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https://github.com/torvalds/linux
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18cb680f1a
It's inappropriate to call clk_prepare() in mxc_restart(), because the restart routine could be called in atomic context. Move clk_get() and clk_prepare() into mxc_arch_reset_init() and only have the atomic part clk_enable() be called in mxc_restart(). As a result, mxc_arch_reset_init() needs to be called after clk gets initialized. While there, it also changes printk(KERN_ERR ...) to pr_err() and adds __init annotation for mxc_arch_reset_init(). Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
101 lines
3 KiB
C
101 lines
3 KiB
C
/*
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* arch/arm/mach-imx/mm-imx27.c
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*
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* Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/pinctrl/machine.h>
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#include <asm/pgtable.h>
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#include <asm/mach/map.h>
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#include "common.h"
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#include "devices/devices-common.h"
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#include "hardware.h"
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#include "iomux-v1.h"
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/* MX27 memory map definition */
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static struct map_desc imx27_io_desc[] __initdata = {
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/*
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* this fixed mapping covers:
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* - AIPI1
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* - AIPI2
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* - AITC
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* - ROM Patch
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* - and some reserved space
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*/
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imx_map_entry(MX27, AIPI, MT_DEVICE),
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/*
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* this fixed mapping covers:
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* - CSI
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* - ATA
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*/
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imx_map_entry(MX27, SAHB1, MT_DEVICE),
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/*
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* this fixed mapping covers:
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* - EMI
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*/
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imx_map_entry(MX27, X_MEMC, MT_DEVICE),
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};
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/*
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* Initialize the memory map. It is called during the
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* system startup to create static physical to virtual
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* memory map for the IO modules.
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*/
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void __init mx27_map_io(void)
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{
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iotable_init(imx27_io_desc, ARRAY_SIZE(imx27_io_desc));
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}
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void __init imx27_init_early(void)
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{
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mxc_set_cpu_type(MXC_CPU_MX27);
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imx_iomuxv1_init(MX27_IO_ADDRESS(MX27_GPIO_BASE_ADDR),
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MX27_NUM_GPIO_PORT);
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}
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void __init mx27_init_irq(void)
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{
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mxc_init_irq(MX27_IO_ADDRESS(MX27_AVIC_BASE_ADDR));
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}
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static const struct resource imx27_audmux_res[] __initconst = {
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DEFINE_RES_MEM(MX27_AUDMUX_BASE_ADDR, SZ_4K),
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};
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void __init imx27_soc_init(void)
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{
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mxc_arch_reset_init(MX27_IO_ADDRESS(MX27_WDOG_BASE_ADDR));
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mxc_device_init();
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/* i.mx27 has the i.mx21 type gpio */
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mxc_register_gpio("imx21-gpio", 0, MX27_GPIO1_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 1, MX27_GPIO2_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 2, MX27_GPIO3_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 3, MX27_GPIO4_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 4, MX27_GPIO5_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 5, MX27_GPIO6_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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pinctrl_provide_dummies();
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imx_add_imx_dma("imx27-dma", MX27_DMA_BASE_ADDR,
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MX27_INT_DMACH0, 0); /* No ERR irq */
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/* imx27 has the imx21 type audmux */
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platform_device_register_simple("imx21-audmux", 0, imx27_audmux_res,
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ARRAY_SIZE(imx27_audmux_res));
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}
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