[PATCH rtems 4/6] bsps/imx*: Support more GPIO controllers

[Christian Mauderer]

The imx-gpio driver used in i.MX and i.MXRT BSPs generates a name based
on a fixed string. The original code only used one digit for the
controller. With the 13 GPIO controllers of the i.MXRT1166, that isn't
enough any more. This patch extends the name to two digits which should
be enough for the next controller generations.
---
 bsps/arm/shared/pins/imx-gpio.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/bsps/arm/shared/pins/imx-gpio.c b/bsps/arm/shared/pins/imx-gpio.c
index 615e13da7d..8b7d09e864 100644
--- a/bsps/arm/shared/pins/imx-gpio.c
+++ b/bsps/arm/shared/pins/imx-gpio.c
@@ -33,14 +33,17 @@
 #include <rtems.h>
 #include <rtems/sysinit.h>
 
-#define IMX_GPIO_ALIAS_NAME "gpioX"
+/*
+ * Most of the time it's gpio1 or gpio13.
+ */
+#define IMX_GPIO_ALIAS_NAME "gpioXY"
 
 /*
- * i.MX6ULL has 5, i.MX7D has 7
+ * i.MX6ULL has 5, i.MX7D has 7, i.MXRT1160 has 13 (base) + 2 (core-specific).
  *
  * Be careful when changing this. The attach() does a simple ASCII conversion.
  */
-#define IMX_MAX_GPIO_MODULES 7
+#define IMX_MAX_GPIO_MODULES 15
 
 struct imx_gpio_regs {
   uint32_t dr;
@@ -88,7 +91,14 @@ static void imx_gpio_attach(void)
     int len;
 
     memcpy(imx_gpio[i].name, IMX_GPIO_ALIAS_NAME, sizeof(IMX_GPIO_ALIAS_NAME));
-    imx_gpio[i].name[sizeof(IMX_GPIO_ALIAS_NAME)-2] = (char)('0' + i);
+    if (i < 10) {
+      imx_gpio[i].name[sizeof(IMX_GPIO_ALIAS_NAME)-3] = (char)('0' + i);
+      imx_gpio[i].name[sizeof(IMX_GPIO_ALIAS_NAME)-2] = '\0';
+    } else {
+      imx_gpio[i].name[sizeof(IMX_GPIO_ALIAS_NAME)-3] = (char)('0' + i / 10);
+      imx_gpio[i].name[sizeof(IMX_GPIO_ALIAS_NAME)-2] = (char)('0' + i % 10);
+      imx_gpio[i].name[sizeof(IMX_GPIO_ALIAS_NAME)-1] = '\0';
+    }
 
     path = fdt_get_alias(fdt, imx_gpio[i].name);
     if (path == NULL) {
-- 
2.35.3