1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
67  * interrupt controller, which is for use when the chip is in deep-sleep mode.
68  * We don't support deep sleep or have a GPC-PIC driver; we need all interrupts
72  * parent for the soc node and letting that get inherited by all other devices
74  * set the world right by just changing the interrupt-parent property of the soc
75  * node to refer to GIC instead of GPC.  This will get us by until we write our
79  * node, so for them to use interrupts we need to apply the same fix as we do
80  * for the soc node.
83  *  - SOC node exists and has GPC as its interrupt parent.
84  *  - GPC node exists and has GIC as its interrupt parent.
85  *  - GIC node exists and is its own interrupt parent or has no parent.
89  * per-soc logic.  We handle this at platform attach time rather than via the
93  * This just in:  as of the import of dts files from linux 4.15 on 2018-02-10,
94  * they appear to have applied a new style rule to the dts which forbids leading
95  * zeroes in the @address qualifiers on node names.  Since we have to find those
96  * nodes by string matching we now have to search for both flavors of each node
103 	static const char *propname = "interrupt-parent";  in fix_node_iparent()
104 	phandle_t node, iparent;  in fix_node_iparent()  local
106 	if ((node = OF_finddevice(nodepath)) == -1)  in fix_node_iparent()
108 	if (OF_getencprop(node, propname, &iparent, sizeof(iparent)) <= 0)  in fix_node_iparent()
113 	OF_setprop(node, propname, &gicxref, sizeof(gicxref));  in fix_node_iparent()
123 	/* GIC node may be child of soc node, or appear directly at root. */  in fix_fdt_interrupt_data()
124 	gicnode = OF_finddevice("/soc/interrupt-controller@00a01000");  in fix_fdt_interrupt_data()
125 	if (gicnode == -1)  in fix_fdt_interrupt_data()
126 		gicnode = OF_finddevice("/soc/interrupt-controller@a01000");  in fix_fdt_interrupt_data()
127 	if (gicnode == -1) {  in fix_fdt_interrupt_data()
128 		gicnode = OF_finddevice("/interrupt-controller@00a01000");  in fix_fdt_interrupt_data()
129 		if (gicnode == -1)  in fix_fdt_interrupt_data()
130 			gicnode = OF_finddevice("/interrupt-controller@a01000");  in fix_fdt_interrupt_data()
131 		if (gicnode == -1)  in fix_fdt_interrupt_data()
136 	/* If gic node has no parent, pretend it is its own parent. */  in fix_fdt_interrupt_data()
137 	result = OF_getencprop(gicnode, "interrupt-parent", &gicipar,  in fix_fdt_interrupt_data()
142 	gpcnode = OF_finddevice("/soc/aips-bus@02000000/gpc@020dc000");  in fix_fdt_interrupt_data()
143 	if (gpcnode == -1)  in fix_fdt_interrupt_data()
144 		gpcnode = OF_finddevice("/soc/aips-bus@2000000/gpc@20dc000");  in fix_fdt_interrupt_data()
145 	if (gpcnode == -1)  in fix_fdt_interrupt_data()
147 	if (gpcnode == -1)  in fix_fdt_interrupt_data()
149 	result = OF_getencprop(gpcnode, "interrupt-parent", &gpcipar,  in fix_fdt_interrupt_data()
167 	phandle_t node;  in fix_fdt_iomuxc_data()  local
170 	 * The linux dts defines two nodes with the same mmio address range,  in fix_fdt_iomuxc_data()
171 	 * iomuxc-gpr and the regular iomuxc.  The -grp node is a simple_mfd and  in fix_fdt_iomuxc_data()
176 	 * range because it partially overlaps with the -gpr range.  in fix_fdt_iomuxc_data()
179 	 * just disable the iomuxc-gpr node because we don't have a driver for  in fix_fdt_iomuxc_data()
182 	 * If we ever write a -gpr driver, this code should probably switch to  in fix_fdt_iomuxc_data()
184 	 * regs, then the -gpr driver can be a regular syscon driver that iomuxc  in fix_fdt_iomuxc_data()
187 	node = OF_finddevice("/soc/aips-bus@2000000/iomuxc-gpr@20e0000");  in fix_fdt_iomuxc_data()
188 	if (node == -1)  in fix_fdt_iomuxc_data()
189 	    node = OF_finddevice("/soc/bus@2000000/iomuxc-gpr@20e0000");  in fix_fdt_iomuxc_data()
190 	if (node != -1)  in fix_fdt_iomuxc_data()
191 		OF_setprop(node, "status", "disabled", sizeof("disabled"));  in fix_fdt_iomuxc_data()
198 	/* Fix soc interrupt-parent property. */  in imx6_attach()
201 	/* Fix iomuxc-gpr and iomuxc nodes both using the same mmio range. */  in imx6_attach()
221  * This attempts to cover the most-used devices with 1MB section mappings, which
227  * AIPS1/AIPS2 cover most of the on-chip devices such as uart, spi, i2c, etc.
262  * This code is based on the way u-boot does it.  Information found on the web
268  * (non-lite flavor).  However, Freescale doesn't seem to have assigned it a
274  * register may be ncpu-1.
276  * This hasn't been tested yet on a dual[-lite].