This patch modifies the spi-s3c64xx.c driver to fetch the Chip select or Slave select gpio line property "cs-gpios" from SPI node instead of "controller_data" subnode.
Rename the property "cs-gpio" to "cs-gpios" in accordance with the SPI core. Such that s3c64xx.c can use spi->cs_gpio instead of parsing the property in the driver. Update the dt-bindings ion spi/spi-samsung.txt Signed-off-by: Naveen Krishna Chatradhi <ch.nav...@samsung.com> Acked-by: Rob Herring <r...@kernel.org> Cc: Javier Martinez Canillas <javier.marti...@collabora.co.uk> Cc: Doug Anderson <diand...@chromium.org> Cc: Tomasz Figa <t.f...@samsung.com> --- This patch is a rework of the change @ http://www.mail-archive.com/devicetree@vger.kernel.org/msg34500.html I'm not sure if i can carry forward the other Signed-offs and Tested-bys .../devicetree/bindings/spi/spi-samsung.txt | 10 +++++----- drivers/spi/spi-s3c64xx.c | 18 ++++++++---------- 2 files changed, 13 insertions(+), 15 deletions(-) diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt index 655b665..ff3c4c9 100644 --- a/Documentation/devicetree/bindings/spi/spi-samsung.txt +++ b/Documentation/devicetree/bindings/spi/spi-samsung.txt @@ -39,15 +39,15 @@ Optional Board Specific Properties: - num-cs: Specifies the number of chip select lines supported. If not specified, the default number of chip select lines is set to 1. +- cs-gpios: A gpio specifier that specifies the gpio line used as + the slave select line by the spi controller. The format of the gpio + specifier depends on the gpio controller (Also read spi-bus.txt). + SPI Controller specific data in SPI slave nodes: - The spi slave nodes should provide the following information which is required by the spi controller. - - cs-gpio: A gpio specifier that specifies the gpio line used as - the slave select line by the spi controller. The format of the gpio - specifier depends on the gpio controller. - - samsung,spi-feedback-delay: The sampling phase shift to be applied on the miso line (to account for any lag in the miso line). The following are the valid values. @@ -85,6 +85,7 @@ Example: #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&spi0_bus>; + cs-gpios = <&gpa2 5 1 0 3>; w25q80bw@0 { #address-cells = <1>; @@ -94,7 +95,6 @@ Example: spi-max-frequency = <10000>; controller-data { - cs-gpio = <&gpa2 5 1 0 3>; samsung,spi-feedback-delay = <0>; }; diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 75a5696..72bfba6 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -764,12 +764,6 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( 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"); - return ERR_PTR(-EINVAL); - } - cs = kzalloc(sizeof(*cs), GFP_KERNEL); if (!cs) { of_node_put(data_np); @@ -777,13 +771,17 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( } /* 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 = spi->cs_gpio; 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); + 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"); return ERR_PTR(-EINVAL); } @@ -1077,7 +1075,7 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
