Add STGEN as SYSCON device: allow access to device address
defined in device tree
Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
---
arch/arm/dts/stm32mp157-u-boot.dtsi | 7 +++++++
arch/arm/mach-stm32mp/Makefile | 1 +
arch/arm/mach-stm32mp/include/mach/stm32.h | 5 +++++
arch/arm/mach-stm32mp/syscon.c | 23 +++++++++++++++++++++++
4 files changed, 36 insertions(+)
create mode 100644 arch/arm/mach-stm32mp/syscon.c
diff --git a/arch/arm/dts/stm32mp157-u-boot.dtsi
b/arch/arm/dts/stm32mp157-u-boot.dtsi
index d374b2b..7a9a4ce 100644
--- a/arch/arm/dts/stm32mp157-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp157-u-boot.dtsi
@@ -31,6 +31,13 @@
soc {
u-boot,dm-pre-reloc;
};
+
+ stgen: stgen@5C008000 {
+ compatible = "st,stm32-stgen";
+ reg = <0x5C008000 0x1000>;
+ status = "okay";
+ u-boot,dm-pre-reloc;
+ };
};
&clk_hsi {
diff --git a/arch/arm/mach-stm32mp/Makefile b/arch/arm/mach-stm32mp/Makefile
index 4620869..a495c53 100644
--- a/arch/arm/mach-stm32mp/Makefile
+++ b/arch/arm/mach-stm32mp/Makefile
@@ -6,5 +6,6 @@
obj-y += cpu.o
obj-y += dram_init.o
+obj-y += syscon.o
obj-$(CONFIG_SPL_BUILD) += spl.o
diff --git a/arch/arm/mach-stm32mp/include/mach/stm32.h
b/arch/arm/mach-stm32mp/include/mach/stm32.h
index 40faeb0..c7a2789 100644
--- a/arch/arm/mach-stm32mp/include/mach/stm32.h
+++ b/arch/arm/mach-stm32mp/include/mach/stm32.h
@@ -25,6 +25,11 @@
#define STM32_DDR_SIZE SZ_1G
#ifndef __ASSEMBLY__
+/* enumerated used to identify the SYSCON driver instance */
+enum {
+ STM32MP_SYSCON_UNKNOWN,
+ STM32MP_SYSCON_STGEN,
+};
/*
* enumerated for boot interface from Bootrom, used in TAMP_BOOT_CONTEXT
diff --git a/arch/arm/mach-stm32mp/syscon.c b/arch/arm/mach-stm32mp/syscon.c
new file mode 100644
index 0000000..5641745
--- /dev/null
+++ b/arch/arm/mach-stm32mp/syscon.c
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <syscon.h>
+#include <asm/arch/stm32.h>
+
+static const struct udevice_id stm32mp_syscon_ids[] = {
+ { .compatible = "st,stm32-stgen",
+ .data = STM32MP_SYSCON_STGEN },
+ { }
+};
+
+U_BOOT_DRIVER(syscon_stm32mp) = {
+ .name = "stmp32mp_syscon",
+ .id = UCLASS_SYSCON,
+ .of_match = stm32mp_syscon_ids,
+ .bind = dm_scan_fdt_dev,
+};
--
2.7.4
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