1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
68  * interrupt controller, which is for use when the chip is in deep-sleep mode.
69  * We don't support deep sleep or have a GPC-PIC driver; we need all interrupts
75  * set the world right by just changing the interrupt-parent property of the soc
84  *  - SOC node exists and has GPC as its interrupt parent.
85  *  - GPC node exists and has GIC as its interrupt parent.
86  *  - GIC node exists and is its own interrupt parent or has no parent.
90  * per-soc logic.  We handle this at platform attach time rather than via the
94  * This just in:  as of the import of dts files from linux 4.15 on 2018-02-10,
104 	static const char *propname = "interrupt-parent";  in fix_node_iparent()
107 	if ((node = OF_finddevice(nodepath)) == -1)  in fix_node_iparent()
125 	gicnode = OF_finddevice("/soc/interrupt-controller@00a01000");  in fix_fdt_interrupt_data()
126 	if (gicnode == -1)  in fix_fdt_interrupt_data()
127 		gicnode = OF_finddevice("/soc/interrupt-controller@a01000");  in fix_fdt_interrupt_data()
128 	if (gicnode == -1) {  in fix_fdt_interrupt_data()
129 		gicnode = OF_finddevice("/interrupt-controller@00a01000");  in fix_fdt_interrupt_data()
130 		if (gicnode == -1)  in fix_fdt_interrupt_data()
131 			gicnode = OF_finddevice("/interrupt-controller@a01000");  in fix_fdt_interrupt_data()
132 		if (gicnode == -1)  in fix_fdt_interrupt_data()
138 	result = OF_getencprop(gicnode, "interrupt-parent", &gicipar,  in fix_fdt_interrupt_data()
143 	gpcnode = OF_finddevice("/soc/aips-bus@02000000/gpc@020dc000");  in fix_fdt_interrupt_data()
144 	if (gpcnode == -1)  in fix_fdt_interrupt_data()
145 		gpcnode = OF_finddevice("/soc/aips-bus@2000000/gpc@20dc000");  in fix_fdt_interrupt_data()
146 	if (gpcnode == -1)  in fix_fdt_interrupt_data()
148 	if (gpcnode == -1)  in fix_fdt_interrupt_data()
150 	result = OF_getencprop(gpcnode, "interrupt-parent", &gpcipar,  in fix_fdt_interrupt_data()
172 	 * iomuxc-gpr and the regular iomuxc.  The -grp node is a simple_mfd and  in fix_fdt_iomuxc_data()
173 	 * a syscon, but it only has access to a small subset of the iomuxc  in fix_fdt_iomuxc_data()
174 	 * registers, so it can't serve as the accessor for the iomuxc driver's  in fix_fdt_iomuxc_data()
176 	 * preventing the real iomuxc driver from allocating its mmio register  in fix_fdt_iomuxc_data()
177 	 * range because it partially overlaps with the -gpr range.  in fix_fdt_iomuxc_data()
180 	 * just disable the iomuxc-gpr node because we don't have a driver for  in fix_fdt_iomuxc_data()
183 	 * If we ever write a -gpr driver, this code should probably switch to  in fix_fdt_iomuxc_data()
184 	 * modifying the reg property so that the range covers all the iomuxc  in fix_fdt_iomuxc_data()
185 	 * regs, then the -gpr driver can be a regular syscon driver that iomuxc  in fix_fdt_iomuxc_data()
188 	node = OF_finddevice("/soc/aips-bus@2000000/iomuxc-gpr@20e0000");  in fix_fdt_iomuxc_data()
189 	if (node == -1)  in fix_fdt_iomuxc_data()
190 	    node = OF_finddevice("/soc/bus@2000000/iomuxc-gpr@20e0000");  in fix_fdt_iomuxc_data()
191 	if (node != -1)  in fix_fdt_iomuxc_data()
199 	/* Fix soc interrupt-parent property. */  in imx6_attach()
202 	/* Fix iomuxc-gpr and iomuxc nodes both using the same mmio range. */  in imx6_attach()
222  * This attempts to cover the most-used devices with 1MB section mappings, which
228  * AIPS1/AIPS2 cover most of the on-chip devices such as uart, spi, i2c, etc.
263  * This code is based on the way u-boot does it.  Information found on the web
269  * (non-lite flavor).  However, Freescale doesn't seem to have assigned it a
275  * register may be ncpu-1.
277  * This hasn't been tested yet on a dual[-lite].