Explicitly disabling unused IPs/blocks. This will lower power consumption.
Signed-off-by: Sandeep Singh Sandeep@freescale.com --- arch/powerpc/cpu/mpc85xx/Makefile | 1 + arch/powerpc/cpu/mpc85xx/b4860_cpu.c | 130 ++++++++++++++++++++++++++++++++++ arch/powerpc/include/asm/processor.h | 1 + board/freescale/b4860qds/b4860qds.c | 2 + 4 files changed, 134 insertions(+), 0 deletions(-) create mode 100644 arch/powerpc/cpu/mpc85xx/b4860_cpu.c
diff --git a/arch/powerpc/cpu/mpc85xx/Makefile b/arch/powerpc/cpu/mpc85xx/Makefile index cefd57b..340f3dd 100644 --- a/arch/powerpc/cpu/mpc85xx/Makefile +++ b/arch/powerpc/cpu/mpc85xx/Makefile @@ -149,6 +149,7 @@ COBJS-$(CONFIG_PPC_T4240) += t4240_serdes.o COBJS-$(CONFIG_PPC_T4160) += t4240_serdes.o COBJS-$(CONFIG_PPC_B4420) += b4860_serdes.o COBJS-$(CONFIG_PPC_B4860) += b4860_serdes.o +COBJS-$(CONFIG_PPC_B4860) += b4860_cpu.o COBJS-$(CONFIG_BSC9132) += bsc9132_serdes.o COBJS-$(CONFIG_PPC_T1040) += t1040_serdes.o
diff --git a/arch/powerpc/cpu/mpc85xx/b4860_cpu.c b/arch/powerpc/cpu/mpc85xx/b4860_cpu.c new file mode 100644 index 0000000..600842a --- /dev/null +++ b/arch/powerpc/cpu/mpc85xx/b4860_cpu.c @@ -0,0 +1,130 @@ +/* + * Copyright 2013 Freescale Semiconductor, Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/processor.h> +#include <asm/io.h> + +#define DISABLE_DDR1 0x8000 +#define DISABLE_DDR2 0x4000 +#define DISABLE_MAPLE_LTE0 0x0080 +#define DISABLE_MAPLE_LTE1 0x0040 +#define DISABLE_MAPLE_WCDMA 0x0020 + +/* Set DCFG_DEVDISRn for devices to be disabled for B4860 */ +#define B4860_DCFG_DEVDISR1 0 +#define B4860_DCFG_DEVDISR2 0 +#define B4860_DCFG_DEVDISR3 0 +#define B4860_DCFG_DEVDISR4 0 +#define B4860_DCFG_DEVDISR5 0 + +/* Set DCFG_DEVDISRn for devices to be disabled for G4860 */ +#define G4860_DCFG_DEVDISR1 0 +#define G4860_DCFG_DEVDISR2 0 +#define G4860_DCFG_DEVDISR3 (DISABLE_MAPLE_LTE0 | DISABLE_MAPLE_LTE1 |\ + DISABLE_MAPLE_WCDMA) +#define G4860_DCFG_DEVDISR4 0 +#define G4860_DCFG_DEVDISR5 0 + +/* Set DCFG_DEVDISRn for devices to be disabled for B4060 */ +#define B4060_DCFG_DEVDISR1 0 +#define B4060_DCFG_DEVDISR2 0 +#define B4060_DCFG_DEVDISR3 0 +#define B4060_DCFG_DEVDISR4 0 +#define B4060_DCFG_DEVDISR5 DISABLE_DDR2 + +/* Set DCFG_DEVDISRn for devices to be disabled for G4060 */ +#define G4060_DCFG_DEVDISR1 0 +#define G4060_DCFG_DEVDISR2 0 +#define G4060_DCFG_DEVDISR3 (DISABLE_MAPLE_LTE0 | DISABLE_MAPLE_LTE1 |\ + DISABLE_MAPLE_WCDMA) +#define G4060_DCFG_DEVDISR4 0 +#define G4060_DCFG_DEVDISR5 DISABLE_DDR2 + +/* Set DCFG_DEVDISRn for devices to be disabled for B4420 */ +#define B4420_DCFG_DEVDISR1 0 +#define B4420_DCFG_DEVDISR2 0 +#define B4420_DCFG_DEVDISR3 DISABLE_MAPLE_LTE1 +#define B4420_DCFG_DEVDISR4 0 +#define B4420_DCFG_DEVDISR5 DISABLE_DDR2 + + +void cpu_device_disable() +{ + ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR; + + /* get devdisr */ + u32 *devdisr1 = in_be32(&gur->devdisr); + u32 *devdisr2 = in_be32(&gur->devdisr2); + u32 *devdisr3 = in_be32(&gur->devdisr3); + u32 *devdisr4 = in_be32(&gur->devdisr4); + u32 *devdisr5 = in_be32(&gur->devdisr5); + + /* get SVR info */ + u32 svr = SVR_SOC_VER(get_svr()); + + /* + * Decide on the basis of SVR which devices to disable for a + * particular personality + */ + switch (svr) { + case SVR_B4860: + setbits_be32(devdisr1, B4860_DCFG_DEVDISR1); + setbits_be32(devdisr2, B4860_DCFG_DEVDISR2); + setbits_be32(devdisr3, B4860_DCFG_DEVDISR3); + setbits_be32(devdisr4, B4860_DCFG_DEVDISR4); + setbits_be32(devdisr5, B4860_DCFG_DEVDISR5); + break; + case SVR_G4860: + setbits_be32(devdisr1, G4860_DCFG_DEVDISR1); + setbits_be32(devdisr2, G4860_DCFG_DEVDISR2); + setbits_be32(devdisr3, G4860_DCFG_DEVDISR3); + setbits_be32(devdisr4, G4860_DCFG_DEVDISR4); + setbits_be32(devdisr5, G4860_DCFG_DEVDISR5); + break; + case SVR_B4060: + setbits_be32(devdisr1, B4060_DCFG_DEVDISR1); + setbits_be32(devdisr2, B4060_DCFG_DEVDISR2); + setbits_be32(devdisr3, B4060_DCFG_DEVDISR3); + setbits_be32(devdisr4, B4060_DCFG_DEVDISR4); + setbits_be32(devdisr5, B4060_DCFG_DEVDISR5); + break; + case SVR_G4060: + setbits_be32(devdisr1, G4060_DCFG_DEVDISR1); + setbits_be32(devdisr2, G4060_DCFG_DEVDISR2); + setbits_be32(devdisr3, G4060_DCFG_DEVDISR3); + setbits_be32(devdisr4, G4060_DCFG_DEVDISR4); + setbits_be32(devdisr5, G4060_DCFG_DEVDISR5); + break; + case SVR_B4420: + setbits_be32(devdisr1, B4420_DCFG_DEVDISR1); + setbits_be32(devdisr2, B4420_DCFG_DEVDISR2); + setbits_be32(devdisr3, B4420_DCFG_DEVDISR3); + setbits_be32(devdisr4, B4420_DCFG_DEVDISR4); + setbits_be32(devdisr5, B4420_DCFG_DEVDISR5); + break; + default: + printf("Unused devices not disabled:" + "No matching SVR\n"); + break; + } +} diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 64a6f9c..143d561 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -1125,6 +1125,7 @@ #define SVR_B4860 0X868000 #define SVR_G4860 0x868001 #define SVR_G4060 0x868003 +#define SVR_B4060 0x868002 #define SVR_B4440 0x868100 #define SVR_G4440 0x868101 #define SVR_B4420 0x868102 diff --git a/board/freescale/b4860qds/b4860qds.c b/board/freescale/b4860qds/b4860qds.c index b1b012c..5e2efd3 100644 --- a/board/freescale/b4860qds/b4860qds.c +++ b/board/freescale/b4860qds/b4860qds.c @@ -575,6 +575,8 @@ int board_early_init_r(void) int ret; u32 svr = SVR_SOC_VER(get_svr());
+ cpu_device_disable(); + /* Create law for MAPLE only for personalities having MAPLE */ if ((svr == SVR_B4860) || (svr == SVR_B4440) || (svr == SVR_B4420) || (svr == SVR_B4220)) {