From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754264AbbJ0M6M (ORCPT ); Tue, 27 Oct 2015 08:58:12 -0400 Received: from unicorn.mansr.com ([81.2.72.234]:53772 "EHLO unicorn.mansr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754046AbbJ0M6L (ORCPT ); Tue, 27 Oct 2015 08:58:11 -0400 From: Mans Rullgard To: Russell King , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RESEND][PATCH] ARM: debug: add support for Palmchip 16550-like UART Date: Tue, 27 Oct 2015 12:57:57 +0000 Message-Id: <1445950678-16097-1-git-send-email-mans@mansr.com> X-Mailer: git-send-email 2.6.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some SoCs have a Palmchip UART with a non-standard register layout. This allows the debug console to work with these. Signed-off-by: Mans Rullgard --- arch/arm/Kconfig.debug | 8 ++++++++ arch/arm/include/debug/8250.S | 12 ++++++++++++ 2 files changed, 20 insertions(+) diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 0cfd7f9..9039fff 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1597,6 +1597,14 @@ 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 variant" + 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/8250.S b/arch/arm/include/debug/8250.S index 7f7446f..2332f40 100644 --- a/arch/arm/include/debug/8250.S +++ b/arch/arm/include/debug/8250.S @@ -9,6 +9,18 @@ */ #include +#ifdef CONFIG_DEBUG_UART_8250_PALMCHIP + +#undef UART_TX +#undef UART_LSR +#undef UART_MSR + +#define UART_TX 1 +#define UART_LSR 7 +#define UART_MSR 8 + +#endif + .macro addruart, rp, rv, tmp ldr \rp, =CONFIG_DEBUG_UART_PHYS ldr \rv, =CONFIG_DEBUG_UART_VIRT -- 2.6.2