forked from Minki/linux
04aafd713b
When gpio core dynamically allocate gpio number for a port, it starts from the end of the total range, 0 ~ ARCH_NR_GPIOS. That said, the earlier a port gets probed, the bigger gpio number it gets assigned. To match this, the irq_base for gpio should be assigned from 'MXC_GPIO_IRQ_START + ARCH_NR_GPIOS' decreasingly. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/*
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* Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2011 Linaro Ltd.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include <mach/common.h>
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#include <mach/mx51.h>
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/*
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* Lookup table for attaching a specific name and platform_data pointer to
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* devices as they get created by of_platform_populate(). Ideally this table
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* would not exist, but the current clock implementation depends on some devices
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* having a specific name.
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*/
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static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = {
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OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART1_BASE_ADDR, "imx21-uart.0", NULL),
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OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART2_BASE_ADDR, "imx21-uart.1", NULL),
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OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART3_BASE_ADDR, "imx21-uart.2", NULL),
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OF_DEV_AUXDATA("fsl,imx51-fec", MX51_FEC_BASE_ADDR, "imx27-fec.0", NULL),
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OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx51.0", NULL),
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OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx51.1", NULL),
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OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx51.2", NULL),
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OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx51.3", NULL),
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OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
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OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
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OF_DEV_AUXDATA("fsl,imx51-cspi", MX51_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
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OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
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OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
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OF_DEV_AUXDATA("fsl,imx51-sdma", MX51_SDMA_BASE_ADDR, "imx35-sdma", NULL),
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OF_DEV_AUXDATA("fsl,imx51-wdt", MX51_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
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{ /* sentinel */ }
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};
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static int __init imx51_tzic_add_irq_domain(struct device_node *np,
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struct device_node *interrupt_parent)
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{
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irq_domain_add_simple(np, 0);
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return 0;
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}
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static int __init imx51_gpio_add_irq_domain(struct device_node *np,
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struct device_node *interrupt_parent)
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{
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static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
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gpio_irq_base -= 32;
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irq_domain_add_simple(np, gpio_irq_base);
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return 0;
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}
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static const struct of_device_id imx51_irq_match[] __initconst = {
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{ .compatible = "fsl,imx51-tzic", .data = imx51_tzic_add_irq_domain, },
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{ .compatible = "fsl,imx51-gpio", .data = imx51_gpio_add_irq_domain, },
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{ /* sentinel */ }
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};
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static const struct of_device_id imx51_iomuxc_of_match[] __initconst = {
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{ .compatible = "fsl,imx51-iomuxc-babbage", .data = imx51_babbage_common_init, },
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{ /* sentinel */ }
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};
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static void __init imx51_dt_init(void)
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{
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struct device_node *node;
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const struct of_device_id *of_id;
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void (*func)(void);
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of_irq_init(imx51_irq_match);
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node = of_find_matching_node(NULL, imx51_iomuxc_of_match);
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if (node) {
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of_id = of_match_node(imx51_iomuxc_of_match, node);
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func = of_id->data;
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func();
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of_node_put(node);
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}
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of_platform_populate(NULL, of_default_bus_match_table,
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imx51_auxdata_lookup, NULL);
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}
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static void __init imx51_timer_init(void)
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{
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mx51_clocks_init_dt();
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}
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static struct sys_timer imx51_timer = {
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.init = imx51_timer_init,
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};
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static const char *imx51_dt_board_compat[] __initdata = {
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"fsl,imx51-babbage",
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NULL
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};
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DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
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.map_io = mx51_map_io,
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.init_early = imx51_init_early,
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.init_irq = mx51_init_irq,
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.handle_irq = imx51_handle_irq,
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.timer = &imx51_timer,
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.init_machine = imx51_dt_init,
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.dt_compat = imx51_dt_board_compat,
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MACHINE_END
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