From mboxrd@z Thu Jan 1 00:00:00 1970 From: jun.nie@linaro.org (Jun Nie) Date: Fri, 27 Mar 2015 21:52:32 +0800 Subject: [PATCH v2 3/7] ARM: zx: add low level debug support for zx296702 In-Reply-To: <1427464356-20112-1-git-send-email-jun.nie@linaro.org> References: <1427464356-20112-1-git-send-email-jun.nie@linaro.org> Message-ID: <1427464356-20112-4-git-send-email-jun.nie@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Use the UART0 peripheral for low level debug. Only the UART port 0 is currently supported. Signed-off-by: Jun Nie --- arch/arm/Kconfig.debug | 14 ++++++++++++++ arch/arm/include/debug/pl01x.S | 7 +++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 970de75..8f0ad72 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1169,6 +1169,18 @@ choice For more details about semihosting, please see chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd. + config DEBUG_ZTE_ZX + bool "Use ZTE ZX UART" + select DEBUG_UART_PL01X + depends on ARCH_ZX + help + Say Y here if you are enabling ZTE ZX296702 SOC and need + debug uart support. + + This option is preferred over the platform specific + options; the platform specific options are deprecated + and will be soon removed. + config DEBUG_LL_UART_8250 bool "Kernel low-level debugging via 8250 UART" help @@ -1349,6 +1361,7 @@ config DEBUG_UART_PHYS default 0x02531000 if DEBUG_KEYSTONE_UART1 default 0x03010fe0 if ARCH_RPC default 0x07000000 if DEBUG_SUN9I_UART0 + default 0x09405000 if DEBUG_ZTE_ZX default 0x10009000 if DEBUG_REALVIEW_STD_PORT || \ DEBUG_VEXPRESS_UART0_CA9 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT @@ -1479,6 +1492,7 @@ config DEBUG_UART_VIRT default 0xfb009000 if DEBUG_REALVIEW_STD_PORT default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT default 0xfc40ab00 if DEBUG_BRCMSTB_UART + default 0xfc705000 if DEBUG_ZTE_ZX default 0xfcfe8600 if DEBUG_UART_BCM63XX default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX default 0xfd000000 if ARCH_SPEAR13XX diff --git a/arch/arm/include/debug/pl01x.S b/arch/arm/include/debug/pl01x.S index 92ef808..f7d8323 100644 --- a/arch/arm/include/debug/pl01x.S +++ b/arch/arm/include/debug/pl01x.S @@ -12,6 +12,13 @@ */ #include +#ifdef CONFIG_DEBUG_ZTE_ZX +#undef UART01x_DR +#undef UART01x_FR +#define UART01x_DR 0x04 +#define UART01x_FR 0x14 +#endif + #ifdef CONFIG_DEBUG_UART_PHYS .macro addruart, rp, rv, tmp ldr \rp, =CONFIG_DEBUG_UART_PHYS -- 1.9.1