forked from Minki/linux
mips: cdmm: Add mti,mips-cdmm dtb node support
Since having and mapping the CDMM block is platform specific, then instead of just returning a zero-address, lets make the default CDMM base address search method (mips_cdmm_phys_base()) to do something useful. For instance to find the address in a dedicated dtb-node in order to support of-based platforms by default. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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@ -13,6 +13,8 @@
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#include <linux/cpu.h>
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#include <linux/cpumask.h>
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#include <linux/io.h>
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#include <linux/of_address.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/smp.h>
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@ -337,9 +339,22 @@ static phys_addr_t mips_cdmm_cur_base(void)
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* Picking a suitable physical address at which to map the CDMM region is
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* platform specific, so this weak function can be overridden by platform
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* code to pick a suitable value if none is configured by the bootloader.
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* By default this method tries to find a CDMM-specific node in the system
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* dtb. Note that this won't work for early serial console.
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*/
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phys_addr_t __weak mips_cdmm_phys_base(void)
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{
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struct device_node *np;
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struct resource res;
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int err;
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np = of_find_compatible_node(NULL, NULL, "mti,mips-cdmm");
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if (np) {
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err = of_address_to_resource(np, 0, &res);
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if (!err)
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return res.start;
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}
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return 0;
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}
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