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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* * Copyright (C) 2010 DENX Software Engineering * * Anatolij Gustschin, <agust@denx.de> * * PDM360NG board setup * * This 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/kernel.h> #include <linux/io.h> #include <linux/of_address.h> #include <linux/of_fdt.h> #include <linux/of_platform.h> #include <asm/machdep.h> #include <asm/ipic.h> #include "mpc512x.h" #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \ defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE) #include <linux/interrupt.h> #include <linux/spi/ads7846.h> #include <linux/spi/spi.h> #include <linux/notifier.h> static void *pdm360ng_gpio_base; static int pdm360ng_get_pendown_state(void) { u32 reg; reg = in_be32(pdm360ng_gpio_base + 0xc); if (reg & 0x40) setbits32(pdm360ng_gpio_base + 0xc, 0x40); reg = in_be32(pdm360ng_gpio_base + 0x8); /* return 1 if pen is down */ return (reg & 0x40) == 0; } static struct ads7846_platform_data pdm360ng_ads7846_pdata = { .model = 7845, .get_pendown_state = pdm360ng_get_pendown_state, .irq_flags = IRQF_TRIGGER_LOW, }; static int __init pdm360ng_penirq_init(void) { struct device_node *np; np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-gpio"); if (!np) { pr_err("%s: Can't find 'mpc5121-gpio' node\n", __func__); return -ENODEV; } pdm360ng_gpio_base = of_iomap(np, 0); of_node_put(np); if (!pdm360ng_gpio_base) { pr_err("%s: Can't map gpio regs.\n", __func__); return -ENODEV; } out_be32(pdm360ng_gpio_base + 0xc, 0xffffffff); setbits32(pdm360ng_gpio_base + 0x18, 0x2000); setbits32(pdm360ng_gpio_base + 0x10, 0x40); return 0; } static int pdm360ng_touchscreen_notifier_call(struct notifier_block *nb, unsigned long event, void *__dev) { struct device *dev = __dev; if ((event == BUS_NOTIFY_ADD_DEVICE) && of_device_is_compatible(dev->of_node, "ti,ads7846")) { dev->platform_data = &pdm360ng_ads7846_pdata; return NOTIFY_OK; } return NOTIFY_DONE; } static struct notifier_block pdm360ng_touchscreen_nb = { .notifier_call = pdm360ng_touchscreen_notifier_call, }; static void __init pdm360ng_touchscreen_init(void) { if (pdm360ng_penirq_init()) return; bus_register_notifier(&spi_bus_type, &pdm360ng_touchscreen_nb); } #else static inline void __init pdm360ng_touchscreen_init(void) { } #endif /* CONFIG_TOUCHSCREEN_ADS7846 */ void __init pdm360ng_init(void) { mpc512x_init(); pdm360ng_touchscreen_init(); } static int __init pdm360ng_probe(void) { if (!of_machine_is_compatible("ifm,pdm360ng")) return 0; mpc512x_init_early(); return 1; } define_machine(pdm360ng) { .name = "PDM360NG", .probe = pdm360ng_probe, .setup_arch = mpc512x_setup_arch, .init = pdm360ng_init, .init_IRQ = mpc512x_init_IRQ, .get_irq = ipic_get_irq, .calibrate_decr = generic_calibrate_decr, .restart = mpc512x_restart, }; |