1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2010 DENX Software Engineering
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Anatolij Gustschin, <agust@denx.de>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * PDM360NG board setup
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/io.h>
12*4882a593Smuzhiyun #include <linux/of_address.h>
13*4882a593Smuzhiyun #include <linux/of_fdt.h>
14*4882a593Smuzhiyun #include <linux/of_platform.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <asm/machdep.h>
17*4882a593Smuzhiyun #include <asm/ipic.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include "mpc512x.h"
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
22*4882a593Smuzhiyun defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
23*4882a593Smuzhiyun #include <linux/interrupt.h>
24*4882a593Smuzhiyun #include <linux/spi/ads7846.h>
25*4882a593Smuzhiyun #include <linux/spi/spi.h>
26*4882a593Smuzhiyun #include <linux/notifier.h>
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static void *pdm360ng_gpio_base;
29*4882a593Smuzhiyun
pdm360ng_get_pendown_state(void)30*4882a593Smuzhiyun static int pdm360ng_get_pendown_state(void)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun u32 reg;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun reg = in_be32(pdm360ng_gpio_base + 0xc);
35*4882a593Smuzhiyun if (reg & 0x40)
36*4882a593Smuzhiyun setbits32(pdm360ng_gpio_base + 0xc, 0x40);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun reg = in_be32(pdm360ng_gpio_base + 0x8);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun /* return 1 if pen is down */
41*4882a593Smuzhiyun return (reg & 0x40) == 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun static struct ads7846_platform_data pdm360ng_ads7846_pdata = {
45*4882a593Smuzhiyun .model = 7845,
46*4882a593Smuzhiyun .get_pendown_state = pdm360ng_get_pendown_state,
47*4882a593Smuzhiyun .irq_flags = IRQF_TRIGGER_LOW,
48*4882a593Smuzhiyun };
49*4882a593Smuzhiyun
pdm360ng_penirq_init(void)50*4882a593Smuzhiyun static int __init pdm360ng_penirq_init(void)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun struct device_node *np;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-gpio");
55*4882a593Smuzhiyun if (!np) {
56*4882a593Smuzhiyun pr_err("%s: Can't find 'mpc5121-gpio' node\n", __func__);
57*4882a593Smuzhiyun return -ENODEV;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun pdm360ng_gpio_base = of_iomap(np, 0);
61*4882a593Smuzhiyun of_node_put(np);
62*4882a593Smuzhiyun if (!pdm360ng_gpio_base) {
63*4882a593Smuzhiyun pr_err("%s: Can't map gpio regs.\n", __func__);
64*4882a593Smuzhiyun return -ENODEV;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun out_be32(pdm360ng_gpio_base + 0xc, 0xffffffff);
67*4882a593Smuzhiyun setbits32(pdm360ng_gpio_base + 0x18, 0x2000);
68*4882a593Smuzhiyun setbits32(pdm360ng_gpio_base + 0x10, 0x40);
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return 0;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
pdm360ng_touchscreen_notifier_call(struct notifier_block * nb,unsigned long event,void * __dev)73*4882a593Smuzhiyun static int pdm360ng_touchscreen_notifier_call(struct notifier_block *nb,
74*4882a593Smuzhiyun unsigned long event, void *__dev)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun struct device *dev = __dev;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun if ((event == BUS_NOTIFY_ADD_DEVICE) &&
79*4882a593Smuzhiyun of_device_is_compatible(dev->of_node, "ti,ads7846")) {
80*4882a593Smuzhiyun dev->platform_data = &pdm360ng_ads7846_pdata;
81*4882a593Smuzhiyun return NOTIFY_OK;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun return NOTIFY_DONE;
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun static struct notifier_block pdm360ng_touchscreen_nb = {
87*4882a593Smuzhiyun .notifier_call = pdm360ng_touchscreen_notifier_call,
88*4882a593Smuzhiyun };
89*4882a593Smuzhiyun
pdm360ng_touchscreen_init(void)90*4882a593Smuzhiyun static void __init pdm360ng_touchscreen_init(void)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun if (pdm360ng_penirq_init())
93*4882a593Smuzhiyun return;
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun bus_register_notifier(&spi_bus_type, &pdm360ng_touchscreen_nb);
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun #else
pdm360ng_touchscreen_init(void)98*4882a593Smuzhiyun static inline void __init pdm360ng_touchscreen_init(void)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun #endif /* CONFIG_TOUCHSCREEN_ADS7846 */
102*4882a593Smuzhiyun
pdm360ng_init(void)103*4882a593Smuzhiyun void __init pdm360ng_init(void)
104*4882a593Smuzhiyun {
105*4882a593Smuzhiyun mpc512x_init();
106*4882a593Smuzhiyun pdm360ng_touchscreen_init();
107*4882a593Smuzhiyun }
108*4882a593Smuzhiyun
pdm360ng_probe(void)109*4882a593Smuzhiyun static int __init pdm360ng_probe(void)
110*4882a593Smuzhiyun {
111*4882a593Smuzhiyun if (!of_machine_is_compatible("ifm,pdm360ng"))
112*4882a593Smuzhiyun return 0;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun mpc512x_init_early();
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun return 1;
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun
define_machine(pdm360ng)119*4882a593Smuzhiyun define_machine(pdm360ng) {
120*4882a593Smuzhiyun .name = "PDM360NG",
121*4882a593Smuzhiyun .probe = pdm360ng_probe,
122*4882a593Smuzhiyun .setup_arch = mpc512x_setup_arch,
123*4882a593Smuzhiyun .init = pdm360ng_init,
124*4882a593Smuzhiyun .init_IRQ = mpc512x_init_IRQ,
125*4882a593Smuzhiyun .get_irq = ipic_get_irq,
126*4882a593Smuzhiyun .calibrate_decr = generic_calibrate_decr,
127*4882a593Smuzhiyun .restart = mpc512x_restart,
128*4882a593Smuzhiyun };
129