forked from Minki/linux
2abbbb63c9
- implement all of the init, init early, and setup arch routines in the shared source file for the MPC512x PowerPC platform, and make all MPC512x based boards (ADS, PDM, generic) use those common routines - remove declarations from header files for routines which aren't referenced from external callers any longer this modification concentrates knowledge about the optional FSL DIU support in one spot within the shared code, and makes all boards benefit transparently from future improvements in the shared platform code the change does not modify any behaviour but preserves all code paths Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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* Copyright (C) 2010 DENX Software Engineering
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*
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* Anatolij Gustschin, <agust@denx.de>
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*
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* PDM360NG board setup
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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_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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unsigned long root = of_get_flat_dt_root();
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return of_flat_dt_is_compatible(root, "ifm,pdm360ng");
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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_early = mpc512x_init_early,
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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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