From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pl1-x641.google.com ([2607:f8b0:4864:20::641]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kMT3W-0006QP-Lg for barebox@lists.infradead.org; Sun, 27 Sep 2020 09:33:19 +0000 Received: by mail-pl1-x641.google.com with SMTP id x5so1593459plo.6 for ; Sun, 27 Sep 2020 02:33:15 -0700 (PDT) From: Du Huanpeng Date: Sun, 27 Sep 2020 17:32:57 +0800 Message-Id: <1601199177-11599-1-git-send-email-u74147@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2] asm/debug_ll_ns16550.h: add parament divisor To: barebox@lists.infradead.org Cc: a.fatoum@pengutronix.de, duhuanpeng From: duhuanpeng add a parameters for the assembly version for passing divisor, and set the default value to DEBUG_LL_UART_ADDR when no parameter is given. now it is possiable to recalculate divisor in runtime to keep the baudrate unchanged. when pll settings changed outside of barebox. e.g. jtag. Signed-off-by: duhuanpeng --- arch/mips/include/asm/debug_ll_ns16550.h | 4 ++-- arch/riscv/include/asm/debug_ll_ns16550.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/mips/include/asm/debug_ll_ns16550.h b/arch/mips/include/asm/debug_ll_ns16550.h index df58c4c..703bfae 100644 --- a/arch/mips/include/asm/debug_ll_ns16550.h +++ b/arch/mips/include/asm/debug_ll_ns16550.h @@ -58,14 +58,14 @@ static inline void PUTC_LL(char ch) * Macros for use in assembly language code */ -.macro debug_ll_ns16550_init +.macro debug_ll_ns16550_init divisor=DEBUG_LL_UART_DIVISOR #ifdef CONFIG_DEBUG_LL la t0, DEBUG_LL_UART_ADDR li t1, UART_LCR_DLAB /* DLAB on */ sb t1, UART_LCR(t0) /* Write it out */ - li t1, DEBUG_LL_UART_DIVISOR + li t1, \divisor sb t1, UART_DLL(t0) /* write low order byte */ srl t1, t1, 8 sb t1, UART_DLM(t0) /* write high order byte */ diff --git a/arch/riscv/include/asm/debug_ll_ns16550.h b/arch/riscv/include/asm/debug_ll_ns16550.h index e891cbd..f1c2ccb 100644 --- a/arch/riscv/include/asm/debug_ll_ns16550.h +++ b/arch/riscv/include/asm/debug_ll_ns16550.h @@ -88,14 +88,14 @@ static inline void debug_ll_ns16550_init(void) * Macros for use in assembly language code */ -.macro debug_ll_ns16550_init +.macro debug_ll_ns16550_init divisor=DEBUG_LL_UART_DIVISOR #ifdef CONFIG_DEBUG_LL li t0, DEBUG_LL_UART_ADDR li t1, UART_LCR_DLAB /* DLAB on */ UART_REG_S t1, UART_LCR(t0) /* Write it out */ - li t1, DEBUG_LL_UART_DIVISOR + li t1, \divisor UART_REG_S t1, UART_DLL(t0) /* write low order byte */ srl t1, t1, 8 UART_REG_S t1, UART_DLM(t0) /* write high order byte */ -- 2.7.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox