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Signed-off-by: Chenhui Zhao --- arch/powerpc/sysdev/fsl_soc.c | 31 +++++++++++++++++++++++++++++++ arch/powerpc/sysdev/fsl_soc.h | 1 + 2 files changed, 32 insertions(+) diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c index 99269c0..ffb7c1c 100644 --- a/arch/powerpc/sysdev/fsl_soc.c +++ b/arch/powerpc/sysdev/fsl_soc.c @@ -45,6 +45,37 @@ extern void init_fcc_ioports(struct fs_platform_info*); extern void init_fec_ioports(struct fs_platform_info*); extern void init_smc_ioports(struct fs_uart_platform_info*); static phys_addr_t immrbase = -1; +static phys_addr_t dcsrbase = -1; + +phys_addr_t get_dcsrbase(void) +{ + struct device_node *np; + const __be32 *prop; + int size; + u32 naddr; + + if (dcsrbase != -1) + return dcsrbase; + + np = of_find_compatible_node(NULL, NULL, "fsl,dcsr"); + if (!np) + return -1; + + prop = of_get_property(np, "#address-cells", &size); + if (prop && size == 4) + naddr = be32_to_cpup(prop); + else + naddr = 2; + + prop = of_get_property(np, "ranges", NULL); + if (prop) + dcsrbase = of_translate_address(np, prop + naddr); + + of_node_put(np); + + return dcsrbase; +} +EXPORT_SYMBOL(get_dcsrbase); phys_addr_t get_immrbase(void) { diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h index 4c5a19e..5fdd3a5 100644 --- a/arch/powerpc/sysdev/fsl_soc.h +++ b/arch/powerpc/sysdev/fsl_soc.h @@ -6,6 +6,7 @@ struct spi_device; +extern phys_addr_t get_dcsrbase(void); extern phys_addr_t get_immrbase(void); #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx) extern u32 get_brgfreq(void);