From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Gonzalez Subject: [RESEND PATCH v2] ARM: debug: add support for Palmchip BK-310x UART Date: Mon, 18 Jan 2016 09:27:47 +0100 Message-ID: <569CA203.6050001@sigmadesigns.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: arm-soc Cc: Sebastian Frias , Mans Rullgard , linux-serial , Linux ARM , Peter Hurley List-Id: linux-serial@vger.kernel.org From: Mans Rullgard Some SoCs use a Palmchip BK-310x UART which is mostly 16550 compatible but with a different register layout. While this UART has previously only been supported in MIPS based chips (Alchemy, Ralink), the ARM based SMP87xx series from Sigma Designs also uses it. This patch allows the debug console to work with this type of UART. Signed-off-by: Mans Rullgard Signed-off-by: Marc Gonzalez --- Peter, this is the patch I've been using on Tango for earlyprintk support. arm-soc, this is just the Nov 8 patch with my Signed-off-by tag. --- arch/arm/Kconfig.debug | 9 +++++++++ arch/arm/include/debug/palmchip.S | 11 +++++++++++ 2 files changed, 20 insertions(+) create mode 100644 arch/arm/include/debug/palmchip.S diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 259c0ca9c99a..708aa9150c00 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1304,6 +1304,7 @@ config DEBUG_SIRFSOC_UART config DEBUG_LL_INCLUDE string default "debug/sa1100.S" if DEBUG_SA1100 + default "debug/palmchip.S" if DEBUG_UART_8250_PALMCHIP default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250 default "debug/at91.S" if DEBUG_AT91_UART default "debug/asm9260.S" if DEBUG_ASM9260_UART @@ -1588,6 +1589,14 @@ config DEBUG_UART_8250_WORD DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2 || \ DEBUG_BRCMSTB_UART +config DEBUG_UART_8250_PALMCHIP + bool "8250 UART is Palmchip BK-310x" + depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 + help + Palmchip provides a UART implementation compatible with 16550 + except for having a different register layout. Say Y here if + the debug UART is of this type. + config DEBUG_UART_8250_FLOW_CONTROL bool "Enable flow control for 8250 UART" depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 diff --git a/arch/arm/include/debug/palmchip.S b/arch/arm/include/debug/palmchip.S new file mode 100644 index 000000000000..6824b2d1c38e --- /dev/null +++ b/arch/arm/include/debug/palmchip.S @@ -0,0 +1,11 @@ +#include + +#undef UART_TX +#undef UART_LSR +#undef UART_MSR + +#define UART_TX 1 +#define UART_LSR 7 +#define UART_MSR 8 + +#include From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc_gonzalez@sigmadesigns.com (Marc Gonzalez) Date: Mon, 18 Jan 2016 09:27:47 +0100 Subject: [RESEND PATCH v2] ARM: debug: add support for Palmchip BK-310x UART Message-ID: <569CA203.6050001@sigmadesigns.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Mans Rullgard Some SoCs use a Palmchip BK-310x UART which is mostly 16550 compatible but with a different register layout. While this UART has previously only been supported in MIPS based chips (Alchemy, Ralink), the ARM based SMP87xx series from Sigma Designs also uses it. This patch allows the debug console to work with this type of UART. Signed-off-by: Mans Rullgard Signed-off-by: Marc Gonzalez --- Peter, this is the patch I've been using on Tango for earlyprintk support. arm-soc, this is just the Nov 8 patch with my Signed-off-by tag. --- arch/arm/Kconfig.debug | 9 +++++++++ arch/arm/include/debug/palmchip.S | 11 +++++++++++ 2 files changed, 20 insertions(+) create mode 100644 arch/arm/include/debug/palmchip.S diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 259c0ca9c99a..708aa9150c00 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1304,6 +1304,7 @@ config DEBUG_SIRFSOC_UART config DEBUG_LL_INCLUDE string default "debug/sa1100.S" if DEBUG_SA1100 + default "debug/palmchip.S" if DEBUG_UART_8250_PALMCHIP default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250 default "debug/at91.S" if DEBUG_AT91_UART default "debug/asm9260.S" if DEBUG_ASM9260_UART @@ -1588,6 +1589,14 @@ config DEBUG_UART_8250_WORD DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2 || \ DEBUG_BRCMSTB_UART +config DEBUG_UART_8250_PALMCHIP + bool "8250 UART is Palmchip BK-310x" + depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 + help + Palmchip provides a UART implementation compatible with 16550 + except for having a different register layout. Say Y here if + the debug UART is of this type. + config DEBUG_UART_8250_FLOW_CONTROL bool "Enable flow control for 8250 UART" depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 diff --git a/arch/arm/include/debug/palmchip.S b/arch/arm/include/debug/palmchip.S new file mode 100644 index 000000000000..6824b2d1c38e --- /dev/null +++ b/arch/arm/include/debug/palmchip.S @@ -0,0 +1,11 @@ +#include + +#undef UART_TX +#undef UART_LSR +#undef UART_MSR + +#define UART_TX 1 +#define UART_LSR 7 +#define UART_MSR 8 + +#include