diff options
Diffstat (limited to 'arch/powerpc/mach-mpc85xx/fdt.c')
| -rw-r--r-- | arch/powerpc/mach-mpc85xx/fdt.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/powerpc/mach-mpc85xx/fdt.c b/arch/powerpc/mach-mpc85xx/fdt.c new file mode 100644 index 0000000000..de0114ad64 --- /dev/null +++ b/arch/powerpc/mach-mpc85xx/fdt.c @@ -0,0 +1,154 @@ +/* + * Copyright 2013 GE Intelligent Platforms, Inc. + * Copyright 2007-2011 Freescale Semiconductor, Inc. + * + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Based on U-Boot arch/powerpc/cpu/mpc85xx/fdt.c and + * common/fdt_support.c - version git-2b26201. + */ +#include <common.h> +#include <init.h> +#include <errno.h> +#include <environment.h> +#include <asm/processor.h> +#include <mach/clock.h> +#include <of.h> + +static void of_setup_crypto_node(void *blob) +{ + struct device_node *crypto_node; + + crypto_node = of_find_compatible_node(blob, NULL, "fsl,sec2.0"); + if (crypto_node == NULL) + return; + + of_delete_node(crypto_node); +} + +/* These properties specify whether the hardware supports the stashing + * of buffer descriptors in L2 cache. + */ +static void fdt_add_enet_stashing(void *fdt) +{ + struct device_node *node; + + node = of_find_compatible_node(fdt, NULL, "gianfar"); + while (node) { + of_set_property(node, "bd-stash", NULL, 0, 1); + of_property_write_u32(node, "rx-stash-len", 96); + of_property_write_u32(node, "rx-stash-idx", 0); + node = of_find_compatible_node(node, NULL, "gianfar"); + } + + node = of_find_compatible_node(fdt, NULL, "fsl,etsec2"); + while (node) { + of_set_property(node, "bd-stash", NULL, 0, 1); + of_property_write_u32(node, "rx-stash-len", 96); + of_property_write_u32(node, "rx-stash-idx", 0); + node = of_find_compatible_node(node, NULL, "fsl,etsec2"); + } +} + +static int fdt_stdout_setup(struct device_node *blob) +{ + struct device_node *node, *alias; + char sername[9] = { 0 }; + const char *prop; + struct console_device *cdev; + int len; + + node = of_create_node(blob, "/chosen"); + if (node == NULL) { + pr_err("%s: could not open /chosen node\n", __func__); + goto error; + } + + cdev = console_get_first_active(); + if (cdev) + sprintf(sername, "serial%d", cdev->dev->id); + else + sprintf(sername, "serial%d", 0); + + alias = of_find_node_by_path_from(blob, "/aliases"); + if (!alias) { + pr_err("%s: could not get aliases node.\n", __func__); + goto error; + } + prop = of_get_property(alias, sername, &len); + of_set_property(node, "linux,stdout-path", prop, len, 1); + + return 0; +error: + return -ENODEV; +} + +static int fdt_cpu_setup(struct device_node *blob, void *unused) +{ + struct device_node *node; + struct sys_info sysinfo; + + /* delete crypto node if not on an E-processor */ + if (!IS_E_PROCESSOR(get_svr())) + of_setup_crypto_node(blob); + + fdt_add_enet_stashing(blob); + fsl_get_sys_info(&sysinfo); + + node = of_find_node_by_type(blob, "cpu"); + while (node) { + const uint32_t *reg; + + of_property_write_u32(node, "timebase-frequency", + fsl_get_timebase_clock()); + of_property_write_u32(node, "bus-frequency", + sysinfo.freqSystemBus); + reg = of_get_property(node, "reg", NULL); + of_property_write_u32(node, "clock-frequency", + sysinfo.freqProcessor[*reg]); + node = of_find_node_by_type(node, "cpu"); + } + + node = of_find_node_by_type(blob, "soc"); + if (node) + of_property_write_u32(node, "bus-frequency", + sysinfo.freqSystemBus); + + node = of_find_compatible_node(blob, NULL, "fsl,elbc"); + if (node) + of_property_write_u32(node, "bus-frequency", + sysinfo.freqLocalBus); + + node = of_find_compatible_node(blob, NULL, "ns16550"); + while (node) { + of_property_write_u32(node, "clock-frequency", + sysinfo.freqSystemBus); + node = of_find_compatible_node(node, NULL, "ns16550"); + } + + node = of_find_compatible_node(blob, NULL, "fsl,mpic"); + if (node) + of_property_write_u32(node, "clock-frequency", + sysinfo.freqSystemBus); + + fdt_stdout_setup(blob); + + return 0; +} + +static int of_register_mpc85xx_fixup(void) +{ + return of_register_fixup(fdt_cpu_setup, NULL); +} +late_initcall(of_register_mpc85xx_fixup); |