From: Erwan Le Ray <erwan.leray@st.com>
To: Russell King <linux@armlinux.org.uk>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Arnd Bergmann <arnd@arndb.de>,
Linus Walleij <linus.walleij@linaro.org>,
Olof Johansson <olof@lixom.net>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Nathan Huckleberry <nhuck15@gmail.com>,
Gerald Baeza <gerald.baeza@st.com>,
Erwan Le Ray <erwan.leray@st.com>,
Clement Peron <peron.clem@gmail.com>,
Fabrice Gasnier <fabrice.gasnier@st.com>
Subject: [PATCH v2 3/4] ARM: debug: stm32: add UART early console support for STM32H7
Date: Fri, 31 Jan 2020 14:41:22 +0100 [thread overview]
Message-ID: <20200131134123.27775-4-erwan.leray@st.com> (raw)
In-Reply-To: <20200131134123.27775-1-erwan.leray@st.com>
Add support of early console for STM32H7. Default UART instance is USART1,
but other UART instances can be configured by setting physical and virtual
base addresses in menuconfig.
Signed-off-by: Erwan Le Ray <erwan.leray@st.com>
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 5ff66c294a5a..e5e1703a89c0 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1223,6 +1223,18 @@ choice
If unsure, say N.
+ config STM32H7_DEBUG_UART
+ bool "Use STM32H7 UART for low-level debug"
+ depends on MACH_STM32H743
+ select DEBUG_STM32_UART
+ help
+ Say Y here if you want kernel low-level debugging support
+ on STM32H7 based platforms, which default UART is wired on
+ USART1, but another UART instance can be selected by modifying
+ CONFIG_DEBUG_UART_PHYS.
+
+ If unsure, say N.
+
config TEGRA_DEBUG_UART_AUTO_ODMDATA
bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
depends on ARCH_TEGRA
@@ -1621,7 +1633,8 @@ config DEBUG_UART_PHYS
default 0x3e000000 if DEBUG_BCM_KONA_UART
default 0x3f201000 if DEBUG_BCM2836
default 0x4000e400 if DEBUG_LL_UART_EFM32
- default 0x40011000 if STM32F4_DEBUG_UART || STM32F7_DEBUG_UART
+ default 0x40011000 if STM32F4_DEBUG_UART || STM32F7_DEBUG_UART || \
+ STM32H7_DEBUG_UART
default 0x40028000 if DEBUG_AT91_SAMV7_USART1
default 0x40081000 if DEBUG_LPC18XX_UART0
default 0x40090000 if DEBUG_LPC32XX
diff --git a/arch/arm/include/debug/stm32.S b/arch/arm/include/debug/stm32.S
index b0c7034b33d9..5a2e2b065340 100644
--- a/arch/arm/include/debug/stm32.S
+++ b/arch/arm/include/debug/stm32.S
@@ -9,7 +9,7 @@
#define STM32_USART_TDR_OFF 0x04
#endif
-#ifdef CONFIG_STM32F7_DEBUG_UART
+#if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART)
#define STM32_USART_SR_OFF 0x1C
#define STM32_USART_TDR_OFF 0x28
#endif
--
2.17.1
next prev parent reply other threads:[~2020-01-31 13:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 13:41 [PATCH v2 0/4] STM32 early console Erwan Le Ray
2020-01-31 13:41 ` [PATCH v2 1/4] ARM: debug: stm32: add UART early console configuration for STM32F4 Erwan Le Ray
2020-01-31 13:41 ` [PATCH v2 2/4] ARM: debug: stm32: add UART early console configuration for STM32F7 Erwan Le Ray
2020-01-31 13:41 ` Erwan Le Ray [this message]
2020-01-31 13:41 ` [PATCH v2 4/4] ARM: debug: stm32: add UART early console support for STM32MP1 Erwan Le Ray
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