From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422731Ab3BOPya (ORCPT ); Fri, 15 Feb 2013 10:54:30 -0500 Received: from vsp-authed02.binero.net ([195.74.38.226]:35271 "HELO vsp-authed-03-02.binero.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S935939Ab3BOPwq (ORCPT ); Fri, 15 Feb 2013 10:52:46 -0500 From: Andreas Larsson To: Grant Likely Cc: Mark Brown , spi-devel-general@lists.sourceforge.net, Mingkai Hu , Anton Vorontsov , Joakim Tjernlund , Kumar Gala , Peter Korsgaard , linux-kernel@vger.kernel.org, software@gaisler.com Subject: [PATCH v3 5/7] spi: spi-fsl-spi: Add support for setting a maximum number of bits per word Date: Fri, 15 Feb 2013 16:52:25 +0100 Message-Id: <1360943547-2186-6-git-send-email-andreas@gaisler.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1360943547-2186-1-git-send-email-andreas@gaisler.com> References: <1360943547-2186-1-git-send-email-andreas@gaisler.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Acked-by: Anton Vorontsov Signed-off-by: Andreas Larsson --- drivers/spi/spi-fsl-lib.h | 1 + drivers/spi/spi-fsl-spi.c | 8 +++++++- 2 files changed, 8 insertions(+), 1 deletions(-) diff --git a/drivers/spi/spi-fsl-lib.h b/drivers/spi/spi-fsl-lib.h index 5a9c36c..d5c788b 100644 --- a/drivers/spi/spi-fsl-lib.h +++ b/drivers/spi/spi-fsl-lib.h @@ -71,6 +71,7 @@ struct mpc8xxx_spi { #ifdef CONFIG_SPI_FSL_SPI int type; + u8 max_bits_per_word; void (*set_shifts)(u32 *rx_shift, u32 *tx_shift, int bits_per_word, int msb_first); diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index 9ae3c44..91d3d26 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -213,7 +213,8 @@ static int fsl_spi_setup_transfer(struct spi_device *spi, /* Make sure its a bit width we support [4..16, 32] */ if ((bits_per_word < 4) - || ((bits_per_word > 16) && (bits_per_word != 32))) + || ((bits_per_word > 16) && (bits_per_word != 32)) + || (bits_per_word > mpc8xxx_spi->max_bits_per_word)) return -EINVAL; if (!hz) @@ -520,6 +521,7 @@ static struct spi_master * fsl_spi_probe(struct device *dev, mpc8xxx_spi = spi_master_get_devdata(master); mpc8xxx_spi->spi_do_one_msg = fsl_spi_do_one_msg; mpc8xxx_spi->spi_remove = fsl_spi_remove; + mpc8xxx_spi->max_bits_per_word = 32; mpc8xxx_spi->type = fsl_spi_get_type(dev); ret = fsl_spi_cpm_init(mpc8xxx_spi); @@ -557,6 +559,10 @@ static struct spi_master * fsl_spi_probe(struct device *dev, /* Enable SPI interface */ regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE; + if (mpc8xxx_spi->max_bits_per_word < 8) { + regval &= ~SPMODE_LEN(0xF); + regval |= SPMODE_LEN(mpc8xxx_spi->max_bits_per_word - 1); + } if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) regval |= SPMODE_OP; -- 1.7.0.4