Merge tag 'spi-fix-v5.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A relatively large set of fixes here, the biggest part of it is for
  fallout from the GPIO descriptor rework that affected several of the
  devices with usable native chip select support. There's also some new
  PCI IDs for Intel Jasper Lake devices.

  The conversion to platform_get_irq() in the fsl driver is an
  incremental fix for build errors introduced on SPARC by the earlier
  fix for error handling in probe in that driver"

* tag 'spi-fix-v5.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: fsl: use platform_get_irq() instead of of_irq_to_resource()
  spi: nxp-fspi: Ensure width is respected in spi-mem operations
  spi: spi-ti-qspi: Fix a bug when accessing non default CS
  spi: fsl: don't map irq during probe
  spi: spi-cavium-thunderx: Add missing pci_release_regions()
  spi: sprd: Fix the incorrect SPI register
  gpiolib: of: Make of_gpio_spi_cs_get_count static
  spi: fsl: Handle the single hardwired chipselect case
  gpio: Handle counting of Freescale chipselects
  spi: fsl: Fix GPIO descriptor support
  spi: dw: Correct handling of native chipselect
  spi: cadence: Correct handling of native chipselect
  spi: pxa2xx: Add support for Intel Jasper Lake

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index dc27b1a88e93..b696e4598a24 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -23,6 +23,29 @@
 #include "gpiolib.h"
 #include "gpiolib-of.h"
 
+/**
+ * of_gpio_spi_cs_get_count() - special GPIO counting for SPI
+ * Some elder GPIO controllers need special quirks. Currently we handle
+ * the Freescale GPIO controller with bindings that doesn't use the
+ * established "cs-gpios" for chip selects but instead rely on
+ * "gpios" for the chip select lines. If we detect this, we redirect
+ * the counting of "cs-gpios" to count "gpios" transparent to the
+ * driver.
+ */
+static int of_gpio_spi_cs_get_count(struct device *dev, const char *con_id)
+{
+	struct device_node *np = dev->of_node;
+
+	if (!IS_ENABLED(CONFIG_SPI_MASTER))
+		return 0;
+	if (!con_id || strcmp(con_id, "cs"))
+		return 0;
+	if (!of_device_is_compatible(np, "fsl,spi") &&
+	    !of_device_is_compatible(np, "aeroflexgaisler,spictrl"))
+		return 0;
+	return of_gpio_named_count(np, "gpios");
+}
+
 /*
  * This is used by external users of of_gpio_count() from <linux/of_gpio.h>
  *
@@ -35,6 +58,10 @@ int of_gpio_get_count(struct device *dev, const char *con_id)
 	char propname[32];
 	unsigned int i;
 
+	ret = of_gpio_spi_cs_get_count(dev, con_id);
+	if (ret > 0)
+		return ret;
+
 	for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
 		if (con_id)
 			snprintf(propname, sizeof(propname), "%s-%s",