Doug Anderson wrote: > > Mark or Kukjin, > Hi, > On Thu, Jun 12, 2014 at 8:59 PM, Naveen Krishna Chatradhi > <ch.naveen@xxxxxxxxxxx> wrote: > > Since, (3146bee spi: s3c64xx: Added provision for dedicated cs pin) > > > > spi-s3c64xx.c driver expects > > 1. chip select gpios from "cs-gpio"(singular) under the > > "controller-data" node of the client/slave device of the SPI. > > > > 2. "cs-gpio"(singular) entry to be present in the SPI device node. > > > > Eg of current broken usage: > > &spi_1 { > > cs-gpio <>; /* this entry is checked during probe */ > > ... > > slave_node { > > controller-data { > > cs-gpio <&gpioa2 5 0>; > > /* This field is parsed during .setup() */ > > } > > }; > > }; > > > > The following dts files which were using this driver. But, > > din't have the "cs-gpio" entry under SPI node. > > -- arch/arm/boot/dts/exynos4210-smdkv310.dts > > -- arch/arm/boot/dts/exynos4412-trats2.dts > > -- arch/arm/boot/dts/exynos5250-smdk5250.dts > > > > Also, the SPI core and many drivers moved on to using "cs-gpios" > > from SPI node and removed the gpio handling code from drivers > > (including spi-s3c64xx.c). > > > > Hence, spi-s3c64xx.c is broken since "Jun 21 11:26:12 2013" and > > considering the time with no compliants about the breakage. > > > > We are assuming it is safe to remove the "cs-gpio"(singular) usage > > from device tree binding of spi-samsung.txt and makes appropriate > > changes in the driver to use "cs-gpios"(plural) from > > SPI device node. > > > > Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx> > > Acked-by: Rob Herring <robh@xxxxxxxxxx> > > Reviewed-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx> > > Tested-by: Doug Anderson <dianders@xxxxxxxxxxxx> > > Cc: Tomasz Figa <t.figa@xxxxxxxxxxx> > > --- > > Changes since v4: > > 1. Added reviewed by from Javier and Tested by from Doug > > > > Changes since v3: > > 1. Remove the sdd->cs_gpio and use gpio_is_valid(spi->cs_gpio) instead > > 2. Keep cs->line only for Non-DT platforms and use spi->cs_gpio > > for DT platforms > > > > .../devicetree/bindings/spi/spi-samsung.txt | 8 ++-- > > drivers/spi/spi-s3c64xx.c | 41 ++++++++------------ > > 2 files changed, 20 insertions(+), 29 deletions(-) > > Is one of you two planning to apply (parts 1 and 2)? I know that > Kukjin needs to handle the part 3 (the .dts files)... > Once Mark takes spi driver related patches, I will pick DT related patches into samsung tree. > Ideally it seems like it could go to 3.16 since it is a bugfix... > I think so but it depends on Mark's comments ;-) Thanks, Kukjin -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html