1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
7 * 2006 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
11 #include <linux/stddef.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/errno.h>
15 #include <linux/major.h>
16 #include <linux/delay.h>
17 #include <linux/irq.h>
18 #include <linux/export.h>
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
22 #include <linux/phy.h>
23 #include <linux/spi/spi.h>
24 #include <linux/fsl_devices.h>
25 #include <linux/reboot.h>
27 #include <linux/atomic.h>
31 #include <asm/machdep.h>
32 #include <sysdev/fsl_soc.h>
33 #include <mm/mmu_decl.h>
35 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */
37 static phys_addr_t immrbase = -1;
39 phys_addr_t get_immrbase(void)
41 struct device_node *soc;
46 soc = of_find_node_by_type(NULL, "soc");
50 if (!of_range_to_resource(soc, 0, &res))
59 EXPORT_SYMBOL(get_immrbase);
61 u32 fsl_get_sys_freq(void)
63 static u32 sysfreq = -1;
64 struct device_node *soc;
69 soc = of_find_node_by_type(NULL, "soc");
73 of_property_read_u32(soc, "clock-frequency", &sysfreq);
74 if (sysfreq == -1 || !sysfreq)
75 of_property_read_u32(soc, "bus-frequency", &sysfreq);
80 EXPORT_SYMBOL(fsl_get_sys_freq);
82 #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE)
86 static u32 brgfreq = -1;
87 struct device_node *node;
92 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
94 of_property_read_u32(node, "clock-frequency", &brgfreq);
99 /* Legacy device binding -- will go away when no users are left. */
100 node = of_find_node_by_type(NULL, "cpm");
102 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
104 node = of_find_node_by_type(NULL, "qe");
107 of_property_read_u32(node, "brg-frequency", &brgfreq);
108 if (brgfreq == -1 || !brgfreq)
109 if (!of_property_read_u32(node, "bus-frequency",
118 EXPORT_SYMBOL(get_brgfreq);
120 u32 get_baudrate(void)
122 static u32 fs_baudrate = -1;
123 struct device_node *node;
125 if (fs_baudrate != -1)
128 node = of_find_node_by_type(NULL, "serial");
130 of_property_read_u32(node, "current-speed", &fs_baudrate);
137 EXPORT_SYMBOL(get_baudrate);
138 #endif /* CONFIG_CPM2 */
140 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
141 static __be32 __iomem *rstcr;
143 static int fsl_rstcr_restart(struct notifier_block *this,
144 unsigned long mode, void *cmd)
147 /* set reset control register */
148 out_be32(rstcr, 0x2); /* HRESET_REQ */
153 static int __init setup_rstcr(void)
155 struct device_node *np;
157 static struct notifier_block restart_handler = {
158 .notifier_call = fsl_rstcr_restart,
162 for_each_node_by_name(np, "global-utilities") {
163 if (of_property_read_bool(np, "fsl,has-rstcr")) {
164 rstcr = of_iomap(np, 0) + 0xb0;
166 printk (KERN_ERR "Error: reset control "
167 "register not mapped!\n");
169 register_restart_handler(&restart_handler);
180 arch_initcall(setup_rstcr);
184 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
185 struct platform_diu_data_ops diu_ops;
186 EXPORT_SYMBOL(diu_ops);
189 #ifdef CONFIG_EPAPR_PARAVIRT
191 * Restart the current partition
193 * This function should be assigned to the ppc_md.restart function pointer,
194 * to initiate a partition restart when we're running under the Freescale
197 void __noreturn fsl_hv_restart(char *cmd)
199 pr_info("hv restart\n");
200 fh_partition_restart(-1);
205 * Halt the current partition
207 * This function should be assigned to the pm_power_off and ppc_md.halt
208 * function pointers, to shut down the partition when we're running under
209 * the Freescale hypervisor.
211 void __noreturn fsl_hv_halt(void)
213 pr_info("hv exit\n");
214 fh_partition_stop(-1);