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128 lines
2.8 KiB
128 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2010 DENX Software Engineering |
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* |
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* Anatolij Gustschin, <[email protected]> |
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* |
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* PDM360NG board setup |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/io.h> |
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#include <linux/of_address.h> |
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#include <linux/of_fdt.h> |
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#include <linux/of_platform.h> |
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#include <asm/machdep.h> |
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#include <asm/ipic.h> |
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#include "mpc512x.h" |
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#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \ |
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defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE) |
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#include <linux/interrupt.h> |
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#include <linux/spi/ads7846.h> |
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#include <linux/spi/spi.h> |
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#include <linux/notifier.h> |
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static void *pdm360ng_gpio_base; |
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static int pdm360ng_get_pendown_state(void) |
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{ |
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u32 reg; |
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reg = in_be32(pdm360ng_gpio_base + 0xc); |
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if (reg & 0x40) |
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setbits32(pdm360ng_gpio_base + 0xc, 0x40); |
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reg = in_be32(pdm360ng_gpio_base + 0x8); |
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/* return 1 if pen is down */ |
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return (reg & 0x40) == 0; |
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} |
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static struct ads7846_platform_data pdm360ng_ads7846_pdata = { |
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.model = 7845, |
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.get_pendown_state = pdm360ng_get_pendown_state, |
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.irq_flags = IRQF_TRIGGER_LOW, |
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}; |
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static int __init pdm360ng_penirq_init(void) |
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{ |
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struct device_node *np; |
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np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-gpio"); |
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if (!np) { |
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pr_err("%s: Can't find 'mpc5121-gpio' node\n", __func__); |
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return -ENODEV; |
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} |
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pdm360ng_gpio_base = of_iomap(np, 0); |
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of_node_put(np); |
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if (!pdm360ng_gpio_base) { |
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pr_err("%s: Can't map gpio regs.\n", __func__); |
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return -ENODEV; |
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} |
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out_be32(pdm360ng_gpio_base + 0xc, 0xffffffff); |
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setbits32(pdm360ng_gpio_base + 0x18, 0x2000); |
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setbits32(pdm360ng_gpio_base + 0x10, 0x40); |
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return 0; |
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} |
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static int pdm360ng_touchscreen_notifier_call(struct notifier_block *nb, |
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unsigned long event, void *__dev) |
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{ |
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struct device *dev = __dev; |
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if ((event == BUS_NOTIFY_ADD_DEVICE) && |
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of_device_is_compatible(dev->of_node, "ti,ads7846")) { |
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dev->platform_data = &pdm360ng_ads7846_pdata; |
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return NOTIFY_OK; |
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} |
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return NOTIFY_DONE; |
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} |
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static struct notifier_block pdm360ng_touchscreen_nb = { |
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.notifier_call = pdm360ng_touchscreen_notifier_call, |
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}; |
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static void __init pdm360ng_touchscreen_init(void) |
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{ |
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if (pdm360ng_penirq_init()) |
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return; |
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bus_register_notifier(&spi_bus_type, &pdm360ng_touchscreen_nb); |
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} |
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#else |
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static inline void __init pdm360ng_touchscreen_init(void) |
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{ |
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} |
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#endif /* CONFIG_TOUCHSCREEN_ADS7846 */ |
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void __init pdm360ng_init(void) |
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{ |
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mpc512x_init(); |
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pdm360ng_touchscreen_init(); |
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} |
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static int __init pdm360ng_probe(void) |
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{ |
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if (!of_machine_is_compatible("ifm,pdm360ng")) |
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return 0; |
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mpc512x_init_early(); |
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return 1; |
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} |
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define_machine(pdm360ng) { |
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.name = "PDM360NG", |
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.probe = pdm360ng_probe, |
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.setup_arch = mpc512x_setup_arch, |
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.init = pdm360ng_init, |
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.init_IRQ = mpc512x_init_IRQ, |
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.get_irq = ipic_get_irq, |
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.calibrate_decr = generic_calibrate_decr, |
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.restart = mpc512x_restart, |
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};
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