Hello Mark, Thanks for the review. On 2 July 2014 22:26, Mark Brown <broonie@xxxxxxxxxx> wrote: > On Fri, Jun 13, 2014 at 09:29:50AM +0530, Naveen Krishna Chatradhi wrote: > >> Hence, spi-s3c64xx.c is broken since "Jun 21 11:26:12 2013" and >> considering the time with no compliants about the breakage. > > I'm not clear what the breakage is? Some boards are broken but what's > the driver issue? ToT was broken for few boards exynos4412-trats2.dts, exynos4210-smdkv310.dts and exynos5250-smdk5250.dts With some DTS changes SPI works well, spi-s3c64xx.c driver had no issues. > >> if (!spi_get_ctldata(spi)) { >> /* Request gpio only if cs line is asserted by gpio pins */ >> - if (sdd->cs_gpio) { >> - err = gpio_request_one(cs->line, GPIOF_OUT_INIT_HIGH, >> - dev_name(&spi->dev)); >> + if (gpio_is_valid(spi->cs_gpio)) { >> + err = gpio_request_one(spi->cs_gpio, >> + GPIOF_OUT_INIT_HIGH, >> + dev_name(&spi->dev)); >> if (err) { >> dev_err(&spi->dev, >> "Failed to get /CS gpio [%d]: %d\n", >> - cs->line, err); >> + spi->cs_gpio, err); >> goto err_gpio_req; >> } >> - >> - spi->cs_gpio = cs->line; >> + } else { >> + dev_err(&spi->dev, "chip select gpio is invalid\n"); >> + return -EINVAL; >> } > > This appears to be making it mandatory to specify a GPIO when previously > it was not mandatory which I believe breaks some SoCs - the native chip > select has to be used on some devices as there is no pinmux option to > make it a GPIO (this was why the native chip select support was added). I read the commit "3146beec21b64f4551fcf0ac148381d54dc41b1b" "spi: s3c64xx: Added provision for dedicated cs pin" I understand "cs_gpio" shouldn't be mandatory. Will remove the else part. > > Also I'd need to check but are you sure that GPIO 0 is not valid? gpio_is_valid() returns true for "number >= 0 && number < ARCH_NR_GPIOS" -- Shine bright, (: Nav :) -- 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