diff options
| author | Andy Shevchenko <[email protected]> | 2025-02-05 13:19:20 +0000 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2025-02-05 13:52:57 +0000 |
| commit | 25fac20edd09b60651eabcc57c187b1277f43d08 (patch) | |
| tree | c470ced10bd37e25633a0e99f18eb3470edc7073 /drivers/spi/spi-gpio.c | |
| parent | spi: gpio: Remove stale documentation part (diff) | |
| download | kernel-25fac20edd09b60651eabcc57c187b1277f43d08.tar.gz kernel-25fac20edd09b60651eabcc57c187b1277f43d08.zip | |
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 <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>
Diffstat (limited to 'drivers/spi/spi-gpio.c')
| -rw-r--r-- | drivers/spi/spi-gpio.c | 11 |
1 files 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); |