From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754008Ab0ESQfm (ORCPT ); Wed, 19 May 2010 12:35:42 -0400 Received: from wolverine01.qualcomm.com ([199.106.114.254]:10205 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752215Ab0ESQfl (ORCPT ); Wed, 19 May 2010 12:35:41 -0400 X-IronPort-AV: E=McAfee;i="5400,1158,5987"; a="41961683" From: Abhijeet Dharmapurikar To: Daniel Walker Cc: Abhijeet Dharmapurikar , David Brown , Daniel Walker , Bryan Huntsman , Alan Cox , Greg Kroah-Hartman , Andrew Morton , Brian Swetland , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] msm_serial: fix serial on trout Date: Wed, 19 May 2010 09:35:35 -0700 Message-Id: <1274286935-8474-1-git-send-email-adharmap@codeaurora.org> X-Mailer: git-send-email 1.5.6.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org All targets report the correct uartclk except trout. For trout force mnd counter values as if uartclk was fed by tcxo/4. For other targets set the mnd counter based on uartclk. Signed-off-by: Abhijeet Dharmapurikar --- drivers/serial/msm_serial.c | 33 ++++++++++++++++++++++++++++----- drivers/serial/msm_serial.h | 6 ++++++ 2 files changed, 34 insertions(+), 5 deletions(-) diff --git a/drivers/serial/msm_serial.c b/drivers/serial/msm_serial.c index ecdc0fa..7021c8c 100644 --- a/drivers/serial/msm_serial.c +++ b/drivers/serial/msm_serial.c @@ -315,16 +315,37 @@ static void msm_reset(struct uart_port *port) msm_write(port, UART_CR_CMD_SET_RFR, UART_CR); } + +static void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) +{ + msm_write(port, 0x06, UART_MREG); + msm_write(port, 0xF1, UART_NREG); + msm_write(port, 0x0F, UART_DREG); + msm_write(port, 0x1A, UART_MNDREG); +} + +static void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port) +{ + msm_write(port, 0x18, UART_MREG); + msm_write(port, 0xF6, UART_NREG); + msm_write(port, 0x0F, UART_DREG); + msm_write(port, 0x0A, UART_MNDREG); +} + +static void msm_serial_set_mnd_regs_from_uartclk(struct uart_port *port) +{ + if (port->uartclk == 19200000) + msm_serial_set_mnd_regs_tcxo(port); + else + msm_serial_set_mnd_regs_tcxoby4(port); +} + static void msm_init_clock(struct uart_port *port) { struct msm_port *msm_port = UART_TO_MSM(port); clk_enable(msm_port->clk); - - msm_write(port, 0xC0, UART_MREG); - msm_write(port, 0xB2, UART_NREG); - msm_write(port, 0x7D, UART_DREG); - msm_write(port, 0x1C, UART_MNDREG); + msm_serial_set_mnd_regs(port); } static int msm_startup(struct uart_port *port) @@ -706,6 +727,8 @@ static int __init msm_serial_probe(struct platform_device *pdev) if (unlikely(IS_ERR(msm_port->clk))) return PTR_ERR(msm_port->clk); port->uartclk = clk_get_rate(msm_port->clk); + printk(KERN_INFO "uartclk = %d\n", port->uartclk); + resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (unlikely(!resource)) diff --git a/drivers/serial/msm_serial.h b/drivers/serial/msm_serial.h index 689f1fa..4767211 100644 --- a/drivers/serial/msm_serial.h +++ b/drivers/serial/msm_serial.h @@ -114,4 +114,10 @@ #define UART_MISR 0x0010 #define UART_ISR 0x0014 +#ifdef CONFIG_MACH_TROUT +#define msm_serial_set_mnd_regs msm_serial_set_mnd_regs_tcxoby4 +#else +#define msm_serial_set_mnd_regs msm_serial_set_mnd_regs_from_uartclk +#endif + #endif /* __DRIVERS_SERIAL_MSM_SERIAL_H */ -- 1.5.6.3