[U-Boot] [PATCH v4 04/20] tegra: tegra124: Add a PMC syscon driver

[Simon Glass]

The PMC can be modelled as a syscon peripheral. Add a driver for this
so that it can be accessed by drivers when needed. Enable it for tegra124
boards.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v4: None
Changes in v3:
- Update commit message, enable for all tegra124 boards not just nyan-big

Changes in v2: None

 arch/arm/include/asm/arch-tegra/tegra.h |  5 +++++
 arch/arm/mach-tegra/Kconfig             |  2 ++
 arch/arm/mach-tegra/tegra124/Makefile   |  1 +
 arch/arm/mach-tegra/tegra124/pmc.c      | 19 +++++++++++++++++++
 4 files changed, 27 insertions(+)
 create mode 100644 arch/arm/mach-tegra/tegra124/pmc.c

diff --git a/arch/arm/include/asm/arch-tegra/tegra.h b/arch/arm/include/asm/arch-tegra/tegra.h
index 3add1b3c09..3b9711d28e 100644
--- a/arch/arm/include/asm/arch-tegra/tegra.h
+++ b/arch/arm/include/asm/arch-tegra/tegra.h
@@ -97,6 +97,11 @@ enum {
 	TEGRA_SOC_UNKNOWN	= -1,
 };
 
+/* Tegra system controller (SYSCON) devices */
+enum {
+	TEGRA_SYSCON_PMC,
+};
+
 #else  /* __ASSEMBLY__ */
 #define PRM_RSTCTRL		NV_PA_PMC_BASE
 #endif
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 89d2a499e4..51e50907d2 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -85,6 +85,8 @@ config TEGRA114
 config TEGRA124
 	bool "Tegra124 family"
 	select TEGRA_ARMV7_COMMON
+	imply REGMAP
+	imply SYSCON
 
 config TEGRA210
 	bool "Tegra210 family"
diff --git a/arch/arm/mach-tegra/tegra124/Makefile b/arch/arm/mach-tegra/tegra124/Makefile
index c00de6151e..d275dafdc4 100644
--- a/arch/arm/mach-tegra/tegra124/Makefile
+++ b/arch/arm/mach-tegra/tegra124/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_SPL_BUILD) += cpu.o
 obj-y	+= clock.o
 obj-y	+= funcmux.o
 obj-y	+= pinmux.o
+obj-y	+= pmc.o
 obj-y	+= xusb-padctl.o
 obj-y	+= ../xusb-padctl-common.o
 
diff --git a/arch/arm/mach-tegra/tegra124/pmc.c b/arch/arm/mach-tegra/tegra124/pmc.c
new file mode 100644
index 0000000000..be82acf11e
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra124/pmc.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2017 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <syscon.h>
+
+static const struct udevice_id tegra124_syscon_ids[] = {
+	{ .compatible = "nvidia,tegra124-pmc", .data = TEGRA_SYSCON_PMC },
+};
+
+U_BOOT_DRIVER(syscon_tegra124) = {
+	.name = "tegra124_syscon",
+	.id = UCLASS_SYSCON,
+	.of_match = tegra124_syscon_ids,
+};
-- 
2.13.2.932.g7449e964c-goog