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stm32mp: add syscon for STGEN

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Add STGEN as SYSCON device: allow access to device address
defined in device tree

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2018-03-20 11:45:14 +01:00 committed by Tom Rini
parent b90f0e7c37
commit e16750ff0e
4 changed files with 36 additions and 0 deletions
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7
arch/arm/dts/stm32mp157-u-boot.dtsi
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@ -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 {

1
arch/arm/mach-stm32mp/Makefile
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@ -6,5 +6,6 @@
obj-y += cpu.o
obj-y += dram_init.o
obj-y += syscon.o
obj-$(CONFIG_SPL_BUILD) += spl.o

5
arch/arm/mach-stm32mp/include/mach/stm32.h
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@ -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

23
arch/arm/mach-stm32mp/syscon.c Normal file
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@ -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,
};