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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2010 DENX Software Engineering
4 *
5 * Anatolij Gustschin, <agust@denx.de>
6 *
7 * PDM360NG board setup
8 */
9
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/io.h>
13#include <linux/of.h>
14#include <linux/of_address.h>
15#include <linux/of_fdt.h>
16
17#include <asm/machdep.h>
18#include <asm/ipic.h>
19
20#include "mpc512x.h"
21
22#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
23 defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
24#include <linux/interrupt.h>
25#include <linux/spi/ads7846.h>
26#include <linux/spi/spi.h>
27#include <linux/notifier.h>
28
29static void *pdm360ng_gpio_base;
30
31static int pdm360ng_get_pendown_state(void)
32{
33 u32 reg;
34
35 reg = in_be32(pdm360ng_gpio_base + 0xc);
36 if (reg & 0x40)
37 setbits32(pdm360ng_gpio_base + 0xc, 0x40);
38
39 reg = in_be32(pdm360ng_gpio_base + 0x8);
40
41 /* return 1 if pen is down */
42 return (reg & 0x40) == 0;
43}
44
45static struct ads7846_platform_data pdm360ng_ads7846_pdata = {
46 .model = 7845,
47 .get_pendown_state = pdm360ng_get_pendown_state,
48 .irq_flags = IRQF_TRIGGER_LOW,
49};
50
51static int __init pdm360ng_penirq_init(void)
52{
53 struct device_node *np;
54
55 np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-gpio");
56 if (!np) {
57 pr_err("%s: Can't find 'mpc5121-gpio' node\n", __func__);
58 return -ENODEV;
59 }
60
61 pdm360ng_gpio_base = of_iomap(np, 0);
62 of_node_put(np);
63 if (!pdm360ng_gpio_base) {
64 pr_err("%s: Can't map gpio regs.\n", __func__);
65 return -ENODEV;
66 }
67 out_be32(pdm360ng_gpio_base + 0xc, 0xffffffff);
68 setbits32(pdm360ng_gpio_base + 0x18, 0x2000);
69 setbits32(pdm360ng_gpio_base + 0x10, 0x40);
70
71 return 0;
72}
73
74static int pdm360ng_touchscreen_notifier_call(struct notifier_block *nb,
75 unsigned long event, void *__dev)
76{
77 struct device *dev = __dev;
78
79 if ((event == BUS_NOTIFY_ADD_DEVICE) &&
80 of_device_is_compatible(dev->of_node, "ti,ads7846")) {
81 dev->platform_data = &pdm360ng_ads7846_pdata;
82 return NOTIFY_OK;
83 }
84 return NOTIFY_DONE;
85}
86
87static struct notifier_block pdm360ng_touchscreen_nb = {
88 .notifier_call = pdm360ng_touchscreen_notifier_call,
89};
90
91static void __init pdm360ng_touchscreen_init(void)
92{
93 if (pdm360ng_penirq_init())
94 return;
95
96 bus_register_notifier(&spi_bus_type, &pdm360ng_touchscreen_nb);
97}
98#else
99static inline void __init pdm360ng_touchscreen_init(void)
100{
101}
102#endif /* CONFIG_TOUCHSCREEN_ADS7846 */
103
104static void __init pdm360ng_init(void)
105{
106 mpc512x_init();
107 pdm360ng_touchscreen_init();
108}
109
110static int __init pdm360ng_probe(void)
111{
112 mpc512x_init_early();
113
114 return 1;
115}
116
117define_machine(pdm360ng) {
118 .name = "PDM360NG",
119 .compatible = "ifm,pdm360ng",
120 .probe = pdm360ng_probe,
121 .setup_arch = mpc512x_setup_arch,
122 .init = pdm360ng_init,
123 .init_IRQ = mpc512x_init_IRQ,
124 .get_irq = ipic_get_irq,
125 .restart = mpc512x_restart,
126};
1/*
2 * Copyright (C) 2010 DENX Software Engineering
3 *
4 * Anatolij Gustschin, <agust@denx.de>
5 *
6 * PDM360NG board setup
7 *
8 * This is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/io.h>
17#include <linux/of_platform.h>
18
19#include <asm/machdep.h>
20#include <asm/ipic.h>
21
22#include "mpc512x.h"
23
24#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
25 defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
26#include <linux/interrupt.h>
27#include <linux/spi/ads7846.h>
28#include <linux/spi/spi.h>
29#include <linux/notifier.h>
30
31static void *pdm360ng_gpio_base;
32
33static int pdm360ng_get_pendown_state(void)
34{
35 u32 reg;
36
37 reg = in_be32(pdm360ng_gpio_base + 0xc);
38 if (reg & 0x40)
39 setbits32(pdm360ng_gpio_base + 0xc, 0x40);
40
41 reg = in_be32(pdm360ng_gpio_base + 0x8);
42
43 /* return 1 if pen is down */
44 return (reg & 0x40) == 0;
45}
46
47static struct ads7846_platform_data pdm360ng_ads7846_pdata = {
48 .model = 7845,
49 .get_pendown_state = pdm360ng_get_pendown_state,
50 .irq_flags = IRQF_TRIGGER_LOW,
51};
52
53static int __init pdm360ng_penirq_init(void)
54{
55 struct device_node *np;
56
57 np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-gpio");
58 if (!np) {
59 pr_err("%s: Can't find 'mpc5121-gpio' node\n", __func__);
60 return -ENODEV;
61 }
62
63 pdm360ng_gpio_base = of_iomap(np, 0);
64 of_node_put(np);
65 if (!pdm360ng_gpio_base) {
66 pr_err("%s: Can't map gpio regs.\n", __func__);
67 return -ENODEV;
68 }
69 out_be32(pdm360ng_gpio_base + 0xc, 0xffffffff);
70 setbits32(pdm360ng_gpio_base + 0x18, 0x2000);
71 setbits32(pdm360ng_gpio_base + 0x10, 0x40);
72
73 return 0;
74}
75
76static int pdm360ng_touchscreen_notifier_call(struct notifier_block *nb,
77 unsigned long event, void *__dev)
78{
79 struct device *dev = __dev;
80
81 if ((event == BUS_NOTIFY_ADD_DEVICE) &&
82 of_device_is_compatible(dev->of_node, "ti,ads7846")) {
83 dev->platform_data = &pdm360ng_ads7846_pdata;
84 return NOTIFY_OK;
85 }
86 return NOTIFY_DONE;
87}
88
89static struct notifier_block pdm360ng_touchscreen_nb = {
90 .notifier_call = pdm360ng_touchscreen_notifier_call,
91};
92
93static void __init pdm360ng_touchscreen_init(void)
94{
95 if (pdm360ng_penirq_init())
96 return;
97
98 bus_register_notifier(&spi_bus_type, &pdm360ng_touchscreen_nb);
99}
100#else
101static inline void __init pdm360ng_touchscreen_init(void)
102{
103}
104#endif /* CONFIG_TOUCHSCREEN_ADS7846 */
105
106void __init pdm360ng_init(void)
107{
108 mpc512x_init();
109 pdm360ng_touchscreen_init();
110}
111
112static int __init pdm360ng_probe(void)
113{
114 unsigned long root = of_get_flat_dt_root();
115
116 return of_flat_dt_is_compatible(root, "ifm,pdm360ng");
117}
118
119define_machine(pdm360ng) {
120 .name = "PDM360NG",
121 .probe = pdm360ng_probe,
122 .setup_arch = mpc512x_setup_diu,
123 .init = pdm360ng_init,
124 .init_early = mpc512x_init_diu,
125 .init_IRQ = mpc512x_init_IRQ,
126 .get_irq = ipic_get_irq,
127 .calibrate_decr = generic_calibrate_decr,
128 .restart = mpc512x_restart,
129};