From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id A141BB86EC for ; Sat, 15 Aug 2009 08:26:05 +1000 (EST) Received: from buildserver.ru.mvista.com (unknown [213.79.90.228]) by ozlabs.org (Postfix) with ESMTP id C188DDDD0B for ; Sat, 15 Aug 2009 08:26:04 +1000 (EST) Date: Sat, 15 Aug 2009 02:26:03 +0400 From: Anton Vorontsov To: David Brownell Subject: [PATCH 6/8] spi_mpc8xxx: Factor out SPI mode change steps into a call Message-ID: <20090814222603.GF14458@oksana.dev.rtsoft.ru> References: <20090814222453.GA9568@oksana.dev.rtsoft.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: <20090814222453.GA9568@oksana.dev.rtsoft.ru> Cc: spi-devel-general@lists.sourceforge.net, Andrew Morton , linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , We'll add more steps soon, so get rid of the duplication. Signed-off-by: Anton Vorontsov --- drivers/spi/spi_mpc8xxx.c | 56 +++++++++++++++++++------------------------- 1 files changed, 24 insertions(+), 32 deletions(-) diff --git a/drivers/spi/spi_mpc8xxx.c b/drivers/spi/spi_mpc8xxx.c index 518671b..4b119ea 100644 --- a/drivers/spi/spi_mpc8xxx.c +++ b/drivers/spi/spi_mpc8xxx.c @@ -155,6 +155,26 @@ MPC83XX_SPI_TX_BUF(u8) MPC83XX_SPI_TX_BUF(u16) MPC83XX_SPI_TX_BUF(u32) +static void mpc8xxx_spi_change_mode(struct spi_device *spi) +{ + struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master); + struct spi_mpc8xxx_cs *cs = spi->controller_state; + __be32 __iomem *mode = &mspi->base->mode; + unsigned long flags; + + if (cs->hw_mode == mpc8xxx_spi_read_reg(mode)) + return; + + /* Turn off IRQs locally to minimize time that SPI is disabled. */ + local_irq_save(flags); + + /* Turn off SPI unit prior changing mode */ + mpc8xxx_spi_write_reg(mode, cs->hw_mode & ~SPMODE_ENABLE); + mpc8xxx_spi_write_reg(mode, cs->hw_mode); + + local_irq_restore(flags); +} + static void mpc8xxx_spi_chipselect(struct spi_device *spi, int value) { struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master); @@ -168,27 +188,13 @@ static void mpc8xxx_spi_chipselect(struct spi_device *spi, int value) } if (value == BITBANG_CS_ACTIVE) { - u32 regval = mpc8xxx_spi_read_reg(&mpc8xxx_spi->base->mode); - mpc8xxx_spi->rx_shift = cs->rx_shift; mpc8xxx_spi->tx_shift = cs->tx_shift; mpc8xxx_spi->get_rx = cs->get_rx; mpc8xxx_spi->get_tx = cs->get_tx; - if (cs->hw_mode != regval) { - unsigned long flags; - __be32 __iomem *mode = &mpc8xxx_spi->base->mode; - - regval = cs->hw_mode; - /* Turn off IRQs locally to minimize time that - * SPI is disabled - */ - local_irq_save(flags); - /* Turn off SPI unit prior changing mode */ - mpc8xxx_spi_write_reg(mode, regval & ~SPMODE_ENABLE); - mpc8xxx_spi_write_reg(mode, regval); - local_irq_restore(flags); - } + mpc8xxx_spi_change_mode(spi); + if (pdata->cs_control) pdata->cs_control(spi, pol); } @@ -198,7 +204,6 @@ static int mpc8xxx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) { struct mpc8xxx_spi *mpc8xxx_spi; - u32 regval; u8 bits_per_word, pm; u32 hz; struct spi_mpc8xxx_cs *cs = spi->controller_state; @@ -286,21 +291,8 @@ int mpc8xxx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) pm--; cs->hw_mode |= SPMODE_PM(pm); - regval = mpc8xxx_spi_read_reg(&mpc8xxx_spi->base->mode); - if (cs->hw_mode != regval) { - unsigned long flags; - __be32 __iomem *mode = &mpc8xxx_spi->base->mode; - - regval = cs->hw_mode; - /* Turn off IRQs locally to minimize time - * that SPI is disabled - */ - local_irq_save(flags); - /* Turn off SPI unit prior changing mode */ - mpc8xxx_spi_write_reg(mode, regval & ~SPMODE_ENABLE); - mpc8xxx_spi_write_reg(mode, regval); - local_irq_restore(flags); - } + + mpc8xxx_spi_change_mode(spi); return 0; } -- 1.6.3.3