diff options
Diffstat (limited to 'arch/arm/mach-mx5/imx51-dt.c')
| -rw-r--r-- | arch/arm/mach-mx5/imx51-dt.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/imx51-dt.c b/arch/arm/mach-mx5/imx51-dt.c new file mode 100644 index 00000000000..ccc61585659 --- /dev/null +++ b/arch/arm/mach-mx5/imx51-dt.c @@ -0,0 +1,116 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2011 Linaro Ltd. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <asm/mach/arch.h> +#include <asm/mach/time.h> +#include <mach/common.h> +#include <mach/mx51.h> + +/* + * Lookup table for attaching a specific name and platform_data pointer to + * devices as they get created by of_platform_populate(). Ideally this table + * would not exist, but the current clock implementation depends on some devices + * having a specific name. + */ +static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = { + OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART1_BASE_ADDR, "imx21-uart.0", NULL), + OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART2_BASE_ADDR, "imx21-uart.1", NULL), + OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART3_BASE_ADDR, "imx21-uart.2", NULL), + OF_DEV_AUXDATA("fsl,imx51-fec", MX51_FEC_BASE_ADDR, "imx27-fec.0", NULL), + OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx51.0", NULL), + OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx51.1", NULL), + OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx51.2", NULL), + OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx51.3", NULL), + OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL), + OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL), + OF_DEV_AUXDATA("fsl,imx51-cspi", MX51_CSPI_BASE_ADDR, "imx35-cspi.0", NULL), + OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C1_BASE_ADDR, "imx-i2c.0", NULL), + OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C2_BASE_ADDR, "imx-i2c.1", NULL), + OF_DEV_AUXDATA("fsl,imx51-sdma", MX51_SDMA_BASE_ADDR, "imx35-sdma", NULL), + OF_DEV_AUXDATA("fsl,imx51-wdt", MX51_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL), + { /* sentinel */ } +}; + +static void __init imx51_tzic_add_irq_domain(struct device_node *np, + struct device_node *interrupt_parent) +{ + irq_domain_add_simple(np, 0); +} + +static void __init imx51_gpio_add_irq_domain(struct device_node *np, + struct device_node *interrupt_parent) +{ + static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS - + 32 * 4; /* imx51 gets 4 gpio ports */ + + irq_domain_add_simple(np, gpio_irq_base); + gpio_irq_base += 32; +} + +static const struct of_device_id imx51_irq_match[] __initconst = { + { .compatible = "fsl,imx51-tzic", .data = imx51_tzic_add_irq_domain, }, + { .compatible = "fsl,imx51-gpio", .data = imx51_gpio_add_irq_domain, }, + { /* sentinel */ } +}; + +static const struct of_device_id imx51_iomuxc_of_match[] __initconst = { + { .compatible = "fsl,imx51-iomuxc-babbage", .data = imx51_babbage_common_init, }, + { /* sentinel */ } +}; + +static void __init imx51_dt_init(void) +{ + struct device_node *node; + const struct of_device_id *of_id; + void (*func)(void); + + of_irq_init(imx51_irq_match); + + node = of_find_matching_node(NULL, imx51_iomuxc_of_match); + if (node) { + of_id = of_match_node(imx51_iomuxc_of_match, node); + func = of_id->data; + func(); + of_node_put(node); + } + + of_platform_populate(NULL, of_default_bus_match_table, + imx51_auxdata_lookup, NULL); +} + +static void __init imx51_timer_init(void) +{ + mx51_clocks_init_dt(); +} + +static struct sys_timer imx51_timer = { + .init = imx51_timer_init, +}; + +static const char *imx51_dt_board_compat[] __initdata = { + "fsl,imx51-babbage", + NULL +}; + +DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)") + .map_io = mx51_map_io, + .init_early = imx51_init_early, + .init_irq = mx51_init_irq, + .handle_irq = imx51_handle_irq, + .timer = &imx51_timer, + .init_machine = imx51_dt_init, + .dt_compat = imx51_dt_board_compat, +MACHINE_END |