arm: Tegra: power: make power.c/.h common for future Tegra3 LCD use

Signed-off-by: Tom Warren <twarren@nvidia.com>

BUG=none
TEST=built Seaboard and Waluigi OK. Booted Waluigi OK.

Change-Id: I1bfbe03945d7dae44e0840349b9698fc08cef07d
Reviewed-on: https://gerrit.chromium.org/gerrit/11504
Tested-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Che-Liang Chiou <clchiou@chromium.org>
Commit-Ready: Che-Liang Chiou <clchiou@chromium.org>

2 files changed, 56 insertions, 1 deletions

diff --git a/arch/arm/cpu/armv7/tegra-common/Makefile b/arch/arm/cpu/armv7/tegra-common/Makefile
index 577a342694..226d190447 100644
--- a/arch/arm/cpu/armv7/tegra-common/Makefile
+++ b/arch/arm/cpu/armv7/tegra-common/Makefile
@@ -31,7 +31,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)libtegra-common.o
 
 SOBJS-y	:= lowlevel_init.o
-COBJS-y	:= ap20.o board.o clock.o timer.o
+COBJS-y	:= ap20.o board.o clock.o power.o timer.o
 
 SOBJS	:= $(SOBJS-y)
 COBJS	:= $(COBJS-y)
diff --git a/arch/arm/cpu/armv7/tegra-common/power.c b/arch/arm/cpu/armv7/tegra-common/power.c
new file mode 100644
index 0000000000..d337bf0955
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra-common/power.c
@@ -0,0 +1,55 @@
+/*
+ * 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
+ */
+
+/* Tegra2 power control functions */
+
+#include <asm/io.h>
+#include <asm/arch-tegra/bitfield.h>
+#include <asm/arch/clock.h>
+#include <asm/arch-tegra/pmc.h>
+#include <asm/arch-tegra/power.h>
+#include <asm/arch/tegra.h>
+#include <common.h>
+
+void power_enable_partition(enum power_partition_id id)
+{
+	struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+	enum power_partition_id clamp_id = id;
+
+	/* The order of these operations is important */
+	reset_set_enable(PERIPH_ID_3D, 1);
+
+	/* Turn the power gate on if it's not on already */
+	if (!(readl(&pmc->pmc_pwrgate_status) & (1 << id)))
+		writel(PWRGATE_ENABLE | id, &pmc->pmc_pwrgate_toggle);
+
+	clock_enable(PERIPH_ID_3D);
+	udelay(10);
+
+	/* The SOC switches these IDs for clamping */
+	if (clamp_id == POWERP_PCI)
+		clamp_id = POWERP_VIDEO_DEC;
+	else if (clamp_id == POWERP_VIDEO_DEC)
+		clamp_id = POWERP_PCI;
+	writel(1 << clamp_id, &pmc->pmc_remove_clamping);
+
+	reset_set_enable(PERIPH_ID_3D, 0);
+}