MIPS: TXx9: Add TX4939 RNG support

Add platform support for RNG of TX4939 SoC.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/include/asm/txx9/tx4939.h b/arch/mips/include/asm/txx9/tx4939.h
index 050364d..d4f342c 100644 (file)
--- a/arch/mips/include/asm/txx9/tx4939.h
+++ b/arch/mips/include/asm/txx9/tx4939.h
@@ -45,6 +45,8 @@
 #define TX4939_RTC_REG         (TX4939_REG_BASE + 0xfb00)
 #define TX4939_CIR_REG         (TX4939_REG_BASE + 0xfc00)
 
+#define TX4939_RNG_REG         (TX4939_CRYPTO_REG + 0xb0)
+
 struct tx4939_le_reg {
        __u32 r;
        __u32 unused;
@@ -547,5 +549,6 @@ void tx4939_ndfmc_init(unsigned int hold, unsigned int spw,
 void tx4939_dmac_init(int memcpy_chan0, int memcpy_chan1);
 void tx4939_aclc_init(void);
 void tx4939_sramc_init(void);
+void tx4939_rng_init(void);
 
 #endif /* __ASM_TXX9_TX4939_H */

diff --git a/arch/mips/txx9/generic/setup_tx4939.c b/arch/mips/txx9/generic/setup_tx4939.c
index df13a89..3dc19f4 100644 (file)
--- a/arch/mips/txx9/generic/setup_tx4939.c
+++ b/arch/mips/txx9/generic/setup_tx4939.c
@@ -500,6 +500,23 @@ void __init tx4939_sramc_init(void)
                txx9_sramc_init(&tx4939_sram_resource);
 }
 
+void __init tx4939_rng_init(void)
+{
+       static struct resource res = {
+               .start = TX4939_RNG_REG & 0xfffffffffULL,
+               .end = (TX4939_RNG_REG & 0xfffffffffULL) + 0x30 - 1,
+               .flags = IORESOURCE_MEM,
+       };
+       static struct platform_device pdev = {
+               .name = "tx4939-rng",
+               .id = -1,
+               .num_resources = 1,
+               .resource = &res,
+       };
+
+       platform_device_register(&pdev);
+}
+
 static void __init tx4939_stop_unused_modules(void)
 {
        __u64 pcfg, rst = 0, ckd = 0;

diff --git a/arch/mips/txx9/rbtx4939/setup.c b/arch/mips/txx9/rbtx4939/setup.c
index b919696..c033ffe 100644 (file)
--- a/arch/mips/txx9/rbtx4939/setup.c
+++ b/arch/mips/txx9/rbtx4939/setup.c
@@ -502,6 +502,7 @@ static void __init rbtx4939_device_init(void)
        tx4939_aclc_init();
        platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
        tx4939_sramc_init();
+       tx4939_rng_init();
 }
 
 static void __init rbtx4939_setup(void)