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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 | /* * 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_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) { unsigned long root = of_get_flat_dt_root(); return of_flat_dt_is_compatible(root, "ifm,pdm360ng"); } define_machine(pdm360ng) { .name = "PDM360NG", .probe = pdm360ng_probe, .setup_arch = mpc512x_setup_diu, .init = pdm360ng_init, .init_early = mpc512x_init_diu, .init_IRQ = mpc512x_init_IRQ, .get_irq = ipic_get_irq, .calibrate_decr = generic_calibrate_decr, .restart = mpc512x_restart, }; |