[PATCH v5 09/13] tegra: add T20 power management controller driver
Lucas Stach
dev at lynxeye.de
Fri Apr 12 06:28:21 EDT 2013
Currently only implements system wide reset functionality.
Signed-off-by: Lucas Stach <dev at lynxeye.de>
---
arch/arm/dts/tegra20.dtsi | 5 ++
arch/arm/mach-tegra/Makefile | 2 +-
arch/arm/mach-tegra/include/mach/tegra20-pmc.h | 37 ++++++++++++++
arch/arm/mach-tegra/reset.c | 39 ---------------
arch/arm/mach-tegra/tegra20-pmc.c | 68 ++++++++++++++++++++++++++
5 files changed, 111 insertions(+), 40 deletions(-)
create mode 100644 arch/arm/mach-tegra/include/mach/tegra20-pmc.h
delete mode 100644 arch/arm/mach-tegra/reset.c
create mode 100644 arch/arm/mach-tegra/tegra20-pmc.c
diff --git a/arch/arm/dts/tegra20.dtsi b/arch/arm/dts/tegra20.dtsi
index cc76527..91858ec 100644
--- a/arch/arm/dts/tegra20.dtsi
+++ b/arch/arm/dts/tegra20.dtsi
@@ -17,4 +17,9 @@
reg = <0x60006000 0x1000>;
#clock-cells = <1>;
};
+
+ pmc {
+ compatible = "nvidia,tegra20-pmc";
+ reg = <0x7000e400 0x400>;
+ };
};
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 1112d11..131a1d9 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -1,3 +1,3 @@
-obj-y += reset.o
obj-y += tegra20-car.o
+obj-y += tegra20-pmc.o
obj-y += tegra20-timer.o
diff --git a/arch/arm/mach-tegra/include/mach/tegra20-pmc.h b/arch/arm/mach-tegra/include/mach/tegra20-pmc.h
new file mode 100644
index 0000000..a905399
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/tegra20-pmc.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2013 Lucas Stach <l.stach at pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* register definitions */
+#define PMC_CNTRL 0x000
+#define PMC_CNTRL_FUSE_OVERRIDE (1 << 18)
+#define PMC_CNTRL_INTR_POLARITY (1 << 17)
+#define PMC_CNTRL_CPUPWRREQ_OE (1 << 16)
+#define PMC_CNTRL_CPUPWRREQ_POLARITY (1 << 15)
+#define PMC_CNTRL_SIDE_EFFECT_LP0 (1 << 14)
+#define PMC_CNTRL_AOINIT (1 << 13)
+#define PMC_CNTRL_PWRGATE_DIS (1 << 12)
+#define PMC_CNTRL_SYSCLK_OE (1 << 11)
+#define PMC_CNTRL_SYSCLK_POLARITY (1 << 10)
+#define PMC_CNTRL_PWRREQ_OE (1 << 9)
+#define PMC_CNTRL_PWRREQ_POLARITY (1 << 8)
+#define PMC_CNTRL_BLINK_EN (1 << 7)
+#define PMC_CNTRL_GLITCHDET_DIS (1 << 6)
+#define PMC_CNTRL_LATCHWAKE_EN (1 << 5)
+#define PMC_CNTRL_MAIN_RST (1 << 4)
+#define PMC_CNTRL_KBC_RST (1 << 3)
+#define PMC_CNTRL_RTC_RST (1 << 2)
+#define PMC_CNTRL_RTC_CLK_DIS (1 << 1)
+#define PMC_CNTRL_KBC_CLK_DIS (1 << 0)
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
deleted file mode 100644
index 91f9b3b..0000000
--- a/arch/arm/mach-tegra/reset.c
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2011 Antony Pavlov <antonynpavlov at gmail.com>
- *
- * This file is part of barebox.
- * 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 version 2
- * as published by the Free Software Foundation.
- *
- * 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.
- *
- */
-
-/**
- * @file
- * @brief Resetting an malta board
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <mach/iomap.h>
-
-#define PRM_RSTCTRL TEGRA_PMC_BASE
-
-void __noreturn reset_cpu(ulong addr)
-{
- int rstctrl;
-
- rstctrl = __raw_readl((char *)PRM_RSTCTRL);
- rstctrl |= 0x10;
- __raw_writel(rstctrl, (char *)PRM_RSTCTRL);
-
- unreachable();
-}
-EXPORT_SYMBOL(reset_cpu);
diff --git a/arch/arm/mach-tegra/tegra20-pmc.c b/arch/arm/mach-tegra/tegra20-pmc.c
new file mode 100644
index 0000000..b7d84d8
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra20-pmc.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2013 Lucas Stach <l.stach at pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file
+ * @brief Device driver for the Tegra 20 power management controller.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+
+#include <mach/tegra20-pmc.h>
+
+static void __iomem *pmc_base;
+
+/* main SoC reset trigger */
+void __noreturn reset_cpu(ulong addr)
+{
+ writel(PMC_CNTRL_MAIN_RST, pmc_base + PMC_CNTRL);
+
+ unreachable();
+}
+EXPORT_SYMBOL(reset_cpu);
+
+static int tegra20_pmc_probe(struct device_d *dev)
+{
+ pmc_base = dev_request_mem_region(dev, 0);
+ if (!pmc_base) {
+ dev_err(dev, "could not get memory region\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static __maybe_unused struct of_device_id tegra20_pmc_dt_ids[] = {
+ {
+ .compatible = "nvidia,tegra20-pmc",
+ }, {
+ /* sentinel */
+ }
+};
+
+static struct driver_d tegra20_pmc_driver = {
+ .probe = tegra20_pmc_probe,
+ .name = "tegra20-pmc",
+ .of_compatible = DRV_OF_COMPAT(tegra20_pmc_dt_ids),
+};
+
+static int tegra20_pmc_init(void)
+{
+ return platform_driver_register(&tegra20_pmc_driver);
+}
+coredevice_initcall(tegra20_pmc_init);
--
1.8.1.4
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