Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758009AbaGCNXP (ORCPT ); Thu, 3 Jul 2014 09:23:15 -0400 Received: from mail-we0-f172.google.com ([74.125.82.172]:50934 "EHLO mail-we0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757834AbaGCNXK (ORCPT ); Thu, 3 Jul 2014 09:23:10 -0400 From: Manuel Lauss To: Linux-MIPS , Mike Turquette Cc: linux-kernel@vger.kernel.org, Manuel Lauss Subject: [RFC PATCH v2 03/11] MIPS: Alchemy: platform: use clk framework for uarts Date: Thu, 3 Jul 2014 15:22:34 +0200 Message-Id: <1404393762-858019-4-git-send-email-manuel.lauss@gmail.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1404393762-858019-1-git-send-email-manuel.lauss@gmail.com> References: <1404393762-858019-1-git-send-email-manuel.lauss@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the clock framework to get the rate of the peripheral clock. Remove the now obsolete get_uart_baud_base function. Signed-off-by: Manuel Lauss --- v2: initial version, taken from original patch #2 arch/mips/alchemy/common/clocks.c | 19 ------------------- arch/mips/alchemy/common/platform.c | 13 ++++++++++++- arch/mips/include/asm/mach-au1x00/au1000.h | 2 -- 3 files changed, 12 insertions(+), 22 deletions(-) diff --git a/arch/mips/alchemy/common/clocks.c b/arch/mips/alchemy/common/clocks.c index 35db35b..e77fa9b 100644 --- a/arch/mips/alchemy/common/clocks.c +++ b/arch/mips/alchemy/common/clocks.c @@ -38,7 +38,6 @@ #define AU1000_SRC_CLK 12000000 static unsigned int au1x00_clock; /* Hz */ -static unsigned long uart_baud_base; /* * Set the au1000_clock @@ -55,21 +54,6 @@ unsigned int get_au1x00_speed(void) EXPORT_SYMBOL(get_au1x00_speed); /* - * The UART baud base is not known at compile time ... if - * we want to be able to use the same code on different - * speed CPUs. - */ -unsigned long get_au1x00_uart_baud_base(void) -{ - return uart_baud_base; -} - -void set_au1x00_uart_baud_base(unsigned long new_baud_base) -{ - uart_baud_base = new_baud_base; -} - -/* * We read the real processor speed from the PLL. This is important * because it is more accurate than computing it from the 32 KHz * counter, if it exists. If we don't have an accurate processor @@ -96,9 +80,6 @@ unsigned long au1xxx_calc_clock(void) /* On Alchemy CPU:counter ratio is 1:1 */ mips_hpt_frequency = cpu_speed; - /* Equation: Baudrate = CPU / (SD * 2 * CLKDIV * 16) */ - set_au1x00_uart_baud_base(cpu_speed / - (2 * ((AU1X_RDSYS(AU1000_SYS_POWERCTRL) & 0x03) + 2) * 16)); set_au1x00_speed(cpu_speed); diff --git a/arch/mips/alchemy/common/platform.c b/arch/mips/alchemy/common/platform.c index 4cdc8fd..e70d5c1 100644 --- a/arch/mips/alchemy/common/platform.c +++ b/arch/mips/alchemy/common/platform.c @@ -11,6 +11,7 @@ * warranty of any kind, whether express or implied. */ +#include #include #include #include @@ -99,10 +100,20 @@ static struct platform_device au1xx0_uart_device = { static void __init alchemy_setup_uarts(int ctype) { - unsigned int uartclk = get_au1x00_uart_baud_base() * 16; + long uartclk; int s = sizeof(struct plat_serial8250_port); int c = alchemy_get_uarts(ctype); struct plat_serial8250_port *ports; + struct clk *clk = clk_get(NULL, ALCHEMY_PERIPH_CLK); + + if (IS_ERR(clk)) + return; + if (clk_prepare_enable(clk)) { + clk_put(clk); + return; + } + uartclk = clk_get_rate(clk); + clk_put(clk); ports = kzalloc(s * (c + 1), GFP_KERNEL); if (!ports) { diff --git a/arch/mips/include/asm/mach-au1x00/au1000.h b/arch/mips/include/asm/mach-au1x00/au1000.h index 734b4ac..46ce1fe 100644 --- a/arch/mips/include/asm/mach-au1x00/au1000.h +++ b/arch/mips/include/asm/mach-au1x00/au1000.h @@ -829,8 +829,6 @@ static inline int alchemy_get_macs(int type) /* arch/mips/au1000/common/clocks.c */ extern void set_au1x00_speed(unsigned int new_freq); extern unsigned int get_au1x00_speed(void); -extern void set_au1x00_uart_baud_base(unsigned long new_baud_base); -extern unsigned long get_au1x00_uart_baud_base(void); extern unsigned long au1xxx_calc_clock(void); /* PM: arch/mips/alchemy/common/sleeper.S, power.c, irq.c */ -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/