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https://github.com/edk2-porting/linux-next.git
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b78d8e59a6
The patch makes necessary changes on gpio-mxc as below to turn it into an upstanding gpio driver. * Add a list to save all mx2 ports references, so that mx2_gpio_irq_handler can walk through all interrupt status registers * Use readl/writel to replace mach-specific accessors __raw_readl/__raw_writel * Change mxc_gpio_init into mxc_gpio_probe function * Move "struct mxc_gpio_port" into gpio-mxc.c, as it needs not to be public at all, and also make some other cleanup on plat-mxc/include/mach/gpio.h at the same time And the patch then migrates mach-imx and mach-mx5 to the updated driver by adding corresponding platform devices. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
86 lines
2.4 KiB
C
86 lines
2.4 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 <mach/hardware.h>
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#include <mach/common.h>
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#include <asm/pgtable.h>
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#include <asm/mach/map.h>
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#include <mach/irqs.h>
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#include <mach/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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mxc_arch_reset_init(MX27_IO_ADDRESS(MX27_WDOG_BASE_ADDR));
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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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void __init imx27_soc_init(void)
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{
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mxc_register_gpio(0, MX27_GPIO1_BASE_ADDR, SZ_4K, MX27_INT_GPIO, 0);
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mxc_register_gpio(1, MX27_GPIO2_BASE_ADDR, SZ_4K, MX27_INT_GPIO, 0);
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mxc_register_gpio(2, MX27_GPIO3_BASE_ADDR, SZ_4K, MX27_INT_GPIO, 0);
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mxc_register_gpio(3, MX27_GPIO4_BASE_ADDR, SZ_4K, MX27_INT_GPIO, 0);
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mxc_register_gpio(4, MX27_GPIO5_BASE_ADDR, SZ_4K, MX27_INT_GPIO, 0);
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mxc_register_gpio(5, MX27_GPIO6_BASE_ADDR, SZ_4K, MX27_INT_GPIO, 0);
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}
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