From: Andy Shevchenko Date: Wed, 5 Feb 2025 13:19:20 +0000 (+0200) Subject: spi: gpio: Support a single always-selected device X-Git-Tag: v6.15-rc1~182^2~35^2 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=25fac20edd09b60651eabcc57c187b1277f43d08;p=thirdparty%2Flinux.git spi: gpio: Support a single always-selected device The generic SPI code, the SPI GPIO driver functions support a single always-connected device cases. The only impediment is that board instantiation prevents that from happening. Update spi_gpio_probe_pdata() checks to support the mentioned hardware setup. Signed-off-by: Andy Shevchenko Link: https://patch.msgid.link/20250205132127.742750-3-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c index 80a1aed429518..405deb6677c17 100644 --- a/drivers/spi/spi-gpio.c +++ b/drivers/spi/spi-gpio.c @@ -313,15 +313,14 @@ static int spi_gpio_probe_pdata(struct platform_device *pdev, struct spi_gpio *spi_gpio = spi_controller_get_devdata(host); int i; - if (!pdata || !pdata->num_chipselect) + if (!pdata) return -ENODEV; - /* - * The host needs to think there is a chipselect even if not - * connected - */ - host->num_chipselect = pdata->num_chipselect ?: 1; + /* It's just one always-selected device, fine to continue */ + if (!pdata->num_chipselect) + return 0; + host->num_chipselect = pdata->num_chipselect; spi_gpio->cs_gpios = devm_kcalloc(dev, host->num_chipselect, sizeof(*spi_gpio->cs_gpios), GFP_KERNEL);