Messages in this thread Patch in this message | | | From | Andy Shevchenko <> | Subject | [PATCH v2 1/2] spi: Allow to have all native CSs in use along with GPIOs | Date | Tue, 20 Apr 2021 19:44:24 +0300 |
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The commit 7d93aecdb58d ("spi: Add generic support for unused native cs with cs-gpios") excludes the valid case for the controllers that doesn't need to switch native CS in order to perform the transfer, i.e. when
0 native ... ... <n> - 1 native <n> GPIO <n> + 1 GPIO ... ...
where <n> defines maximum of native CSs supported by the controller.
To allow this, bail out from spi_get_gpio_descs() conditionally for the controllers which explicitly marked with SPI_MASTER_GPIO_SS.
Fixes: 7d93aecdb58d ("spi: Add generic support for unused native cs with cs-gpios") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- v2: no changes drivers/spi/spi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 36c46feab6d4..9c3730a9f7d5 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -2610,8 +2610,9 @@ static int spi_get_gpio_descs(struct spi_controller *ctlr) } ctlr->unused_native_cs = ffz(native_cs_mask); - if (num_cs_gpios && ctlr->max_native_cs && - ctlr->unused_native_cs >= ctlr->max_native_cs) { + + if ((ctlr->flags & SPI_MASTER_GPIO_SS) && num_cs_gpios && + ctlr->max_native_cs && ctlr->unused_native_cs >= ctlr->max_native_cs) { dev_err(dev, "No unused native chip select available\n"); return -EINVAL; } -- 2.30.2
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