| Message ID | 1402390859-28287-2-git-send-email-ch.naveen@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hello All, On 10 June 2014 14:30, Naveen Krishna Chatradhi <ch.naveen@samsung.com> wrote: > This patch makes the changes in spi-s3c64xx.c driver to make use of > "cs-gpios" from SPI node(parent) instead of "cs-gpio" defined in > slaves "controller-data"(child) node. > > Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> > Cc: Javier Martinez Canillas <javier.martinez@collabora.co.uk> > Cc: Doug Anderson <dianders@chromium.org> > --- > drivers/spi/spi-s3c64xx.c | 56 ++++++++++++++++++++++++++++----------------- > 1 file changed, 35 insertions(+), 21 deletions(-) > > diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c > index 75a5696..0c6013f 100644 > --- a/drivers/spi/spi-s3c64xx.c > +++ b/drivers/spi/spi-s3c64xx.c > @@ -750,47 +750,56 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, > } > > static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( > - struct spi_device *spi) > + struct spi_device *spi, > + struct s3c64xx_spi_csinfo *cs) > { > - struct s3c64xx_spi_csinfo *cs; > - struct device_node *slave_np, *data_np = NULL; > - struct s3c64xx_spi_driver_data *sdd; > + struct device_node *data_np = NULL; > u32 fb_delay = 0; > > - sdd = spi_master_get_devdata(spi->master); > - slave_np = spi->dev.of_node; > - if (!slave_np) { > - dev_err(&spi->dev, "device node not found\n"); > + data_np = of_get_child_by_name(spi->dev.of_node, "controller-data"); > + if (!data_np) { > + dev_err(&spi->dev, "child node 'controller-data' not found\n"); > return ERR_PTR(-EINVAL); > } > > - data_np = of_get_child_by_name(slave_np, "controller-data"); > - if (!data_np) { > - dev_err(&spi->dev, "child node 'controller-data' not found\n"); > + of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay); > + cs->fb_delay = fb_delay; > + of_node_put(data_np); > + > + return cs; > +} > + > +static struct s3c64xx_spi_csinfo *s3c64xx_get_cs_gpios(struct spi_device *spi) > +{ > + struct device_node *parent_np = NULL; > + struct s3c64xx_spi_driver_data *sdd; > + struct s3c64xx_spi_csinfo *cs; > + > + parent_np = of_get_parent(spi->dev.of_node); > + if (!parent_np) { > + dev_err(&spi->dev, "Parent node not found\n"); > return ERR_PTR(-EINVAL); > } > > + sdd = spi_master_get_devdata(spi->master); > + > cs = kzalloc(sizeof(*cs), GFP_KERNEL); > if (!cs) { > - of_node_put(data_np); > + of_node_put(parent_np); > return ERR_PTR(-ENOMEM); > } > > /* The CS line is asserted/deasserted by the gpio pin */ > if (sdd->cs_gpio) > - cs->line = of_get_named_gpio(data_np, "cs-gpio", 0); > + cs->line = of_get_named_gpio(parent_np, "cs-gpios", 0); > > if (!gpio_is_valid(cs->line)) { > dev_err(&spi->dev, "chip select gpio is not specified or invalid\n"); > - kfree(cs); > - of_node_put(data_np); > + of_node_put(parent_np); > return ERR_PTR(-EINVAL); > } > > - of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay); > - cs->fb_delay = fb_delay; > - of_node_put(data_np); > - return cs; > + return s3c64xx_get_slave_ctrldata(spi, cs); > } > > /* > @@ -806,9 +815,14 @@ static int s3c64xx_spi_setup(struct spi_device *spi) > struct s3c64xx_spi_info *sci; > int err; > > + if (!spi->dev.of_node) { > + dev_err(&spi->dev, "device node not found\n"); > + return ERR_PTR(-EINVAL); > + } > + > sdd = spi_master_get_devdata(spi->master); > if (!cs && spi->dev.of_node) { > - cs = s3c64xx_get_slave_ctrldata(spi); > + cs = s3c64xx_get_cs_gpios(spi); > spi->controller_data = cs; > } > > @@ -1077,7 +1091,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) > sdd->sfr_start = mem_res->start; > sdd->cs_gpio = true; > if (pdev->dev.of_node) { > - if (!of_find_property(pdev->dev.of_node, "cs-gpio", NULL)) > + if (!of_find_property(pdev->dev.of_node, "cs-gpios", NULL)) > sdd->cs_gpio = false; > > ret = of_alias_get_id(pdev->dev.of_node, "spi"); > -- > 1.7.9.5 Forgot to add the DTS documentation. Will quickly respin. Thanks. >
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 75a5696..0c6013f 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -750,47 +750,56 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, } static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( - struct spi_device *spi) + struct spi_device *spi, + struct s3c64xx_spi_csinfo *cs) { - struct s3c64xx_spi_csinfo *cs; - struct device_node *slave_np, *data_np = NULL; - struct s3c64xx_spi_driver_data *sdd; + struct device_node *data_np = NULL; u32 fb_delay = 0; - sdd = spi_master_get_devdata(spi->master); - slave_np = spi->dev.of_node; - if (!slave_np) { - dev_err(&spi->dev, "device node not found\n"); + data_np = of_get_child_by_name(spi->dev.of_node, "controller-data"); + if (!data_np) { + dev_err(&spi->dev, "child node 'controller-data' not found\n"); return ERR_PTR(-EINVAL); } - data_np = of_get_child_by_name(slave_np, "controller-data"); - if (!data_np) { - dev_err(&spi->dev, "child node 'controller-data' not found\n"); + of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay); + cs->fb_delay = fb_delay; + of_node_put(data_np); + + return cs; +} + +static struct s3c64xx_spi_csinfo *s3c64xx_get_cs_gpios(struct spi_device *spi) +{ + struct device_node *parent_np = NULL; + struct s3c64xx_spi_driver_data *sdd; + struct s3c64xx_spi_csinfo *cs; + + parent_np = of_get_parent(spi->dev.of_node); + if (!parent_np) { + dev_err(&spi->dev, "Parent node not found\n"); return ERR_PTR(-EINVAL); } + sdd = spi_master_get_devdata(spi->master); + cs = kzalloc(sizeof(*cs), GFP_KERNEL); if (!cs) { - of_node_put(data_np); + of_node_put(parent_np); return ERR_PTR(-ENOMEM); } /* The CS line is asserted/deasserted by the gpio pin */ if (sdd->cs_gpio) - cs->line = of_get_named_gpio(data_np, "cs-gpio", 0); + cs->line = of_get_named_gpio(parent_np, "cs-gpios", 0); if (!gpio_is_valid(cs->line)) { dev_err(&spi->dev, "chip select gpio is not specified or invalid\n"); - kfree(cs); - of_node_put(data_np); + of_node_put(parent_np); return ERR_PTR(-EINVAL); } - of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay); - cs->fb_delay = fb_delay; - of_node_put(data_np); - return cs; + return s3c64xx_get_slave_ctrldata(spi, cs); } /* @@ -806,9 +815,14 @@ static int s3c64xx_spi_setup(struct spi_device *spi) struct s3c64xx_spi_info *sci; int err; + if (!spi->dev.of_node) { + dev_err(&spi->dev, "device node not found\n"); + return ERR_PTR(-EINVAL); + } + sdd = spi_master_get_devdata(spi->master); if (!cs && spi->dev.of_node) { - cs = s3c64xx_get_slave_ctrldata(spi); + cs = s3c64xx_get_cs_gpios(spi); spi->controller_data = cs; } @@ -1077,7 +1091,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) sdd->sfr_start = mem_res->start; sdd->cs_gpio = true; if (pdev->dev.of_node) { - if (!of_find_property(pdev->dev.of_node, "cs-gpio", NULL)) + if (!of_find_property(pdev->dev.of_node, "cs-gpios", NULL)) sdd->cs_gpio = false; ret = of_alias_get_id(pdev->dev.of_node, "spi");
This patch makes the changes in spi-s3c64xx.c driver to make use of "cs-gpios" from SPI node(parent) instead of "cs-gpio" defined in slaves "controller-data"(child) node. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Cc: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Cc: Doug Anderson <dianders@chromium.org> --- drivers/spi/spi-s3c64xx.c | 56 ++++++++++++++++++++++++++++----------------- 1 file changed, 35 insertions(+), 21 deletions(-)