From c5b34a29acb17343479ace6219e8ae55677a9a26 Mon Sep 17 00:00:00 2001 From: Jimmy Zhang Date: Tue, 10 Apr 2012 05:17:06 +0000 Subject: [PATCH] tegra: Add EMC settings for Seaboard Set Seaboard to optimal memory settings based on the SOC in use (T20 or T25). Signed-off-by: Simon Glass Acked-by: Stephen Warren Signed-off-by: Jimmy Zhang Signed-off-by: Tom Warren --- board/nvidia/common/Makefile | 1 + board/nvidia/common/board.c | 14 ++++++++-- board/nvidia/common/emc.c | 53 ++++++++++++++++++++++++++++++++++++ board/nvidia/common/emc.h | 29 ++++++++++++++++++++ 4 files changed, 95 insertions(+), 2 deletions(-) create mode 100644 board/nvidia/common/emc.c create mode 100644 board/nvidia/common/emc.h diff --git a/board/nvidia/common/Makefile b/board/nvidia/common/Makefile index 3e748fdd20..a93d4583e7 100644 --- a/board/nvidia/common/Makefile +++ b/board/nvidia/common/Makefile @@ -27,6 +27,7 @@ LIB = $(obj)lib$(VENDOR).o COBJS-y += board.o COBJS-$(CONFIG_SPI_UART_SWITCH) += uart-spi-switch.o +COBJS-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o COBJS := $(COBJS-y) SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c index 1d6b002702..2e22133591 100644 --- a/board/nvidia/common/board.c +++ b/board/nvidia/common/board.c @@ -23,6 +23,7 @@ #include #include +#include #include #include #include @@ -30,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -39,6 +41,7 @@ #include #include #include "board.h" +#include "emc.h" DECLARE_GLOBAL_DATA_PTR; @@ -82,6 +85,8 @@ static void power_det_init(void) */ int board_init(void) { + __maybe_unused int err; + /* Do clocks and UART first so that printf() works */ clock_init(); clock_verify(); @@ -105,8 +110,13 @@ int board_init(void) # ifdef CONFIG_TEGRA_PMU if (pmu_set_nominal()) debug("Failed to select nominal voltages\n"); -# endif -#endif +# ifdef CONFIG_TEGRA_CLOCK_SCALING + err = board_emc_init(); + if (err) + debug("Memory controller init failed: %d\n", err); +# endif +# endif /* CONFIG_TEGRA_PMU */ +#endif /* CONFIG_TEGRA_I2C */ #ifdef CONFIG_USB_EHCI_TEGRA pin_mux_usb(); diff --git a/board/nvidia/common/emc.c b/board/nvidia/common/emc.c new file mode 100644 index 0000000000..8e4290ceed --- /dev/null +++ b/board/nvidia/common/emc.c @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +/* These rates are hard-coded for now, until fdt provides them */ +#define EMC_SDRAM_RATE_T20 (333000 * 2 * 1000) +#define EMC_SDRAM_RATE_T25 (380000 * 2 * 1000) + +int board_emc_init(void) +{ + unsigned rate; + + switch (tegra_get_chip_type()) { + default: + case TEGRA_SOC_T20: + rate = EMC_SDRAM_RATE_T20; + break; + case TEGRA_SOC_T25: + rate = EMC_SDRAM_RATE_T25; + break; + } + return tegra_set_emc(gd->fdt_blob, rate); +} diff --git a/board/nvidia/common/emc.h b/board/nvidia/common/emc.h new file mode 100644 index 0000000000..ec1b115f45 --- /dev/null +++ b/board/nvidia/common/emc.h @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2010,2011 NVIDIA Corporation + * + * 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 + */ + +#ifndef _NVIDIA_EMC_H_ +#define _NVIDIA_EMC_H_ + +int board_emc_init(void); + +#endif -- 2.25.1