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Message-ID: <20250205132127.742750-3-andriy.shevchenko@linux.intel.com> Date: Wed, 5 Feb 2025 15:19:20 +0200 From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Mark Brown <broonie@...nel.org> Subject: [PATCH v1 2/2] 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 <andriy.shevchenko@...ux.intel.com> --- drivers/spi/spi-gpio.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c index 80a1aed42951..405deb6677c1 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); -- 2.43.0.rc1.1336.g36b5255a03ac
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