powerpc: mpc85xx: Add dummy gpio.h to enable CONFIG_OF_CONTROL

If CONFIG_OF_CONTROL is enabled, lib/fdtdec.c is compiled. It includes <asm/gpio.h> and then <asm/gpio.h> includes <asm/arch/gpio.h>. As a result, all the SoCs that enable CONFIG_OF_CONTROL must have <asm/arch/gpio.h>.

The right fix would be to split the lib/fdtdec.c to remove dependency on GPIO.

This commit adds a dummy <asm/arch/gpio.h> to support OF_CONTROL for mpc85xx platform. A file mpc85xx_gpio.h exists in arch/powerpc/include/asm. The defintions in that file conflict with the ones in asm-generic/gpio.h. Hence a dummy header file has been added. This will be removed after FDT-GPIO stuff is fixed correctly.

---
 arch/powerpc/include/asm/arch-mpc85xx/gpio.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 arch/powerpc/include/asm/arch-mpc85xx/gpio.h

new file mode 100644
index 0000000..8beed30
@@ -0,0 +1,15 @@
+/*
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Dummy header file to enable CONFIG_OF_CONTROL.
+ * If CONFIG_OF_CONTROL is enabled, lib/fdtdec.c is compiled.
+ * It includes <asm/arch/gpio.h> via <asm/gpio.h>, so those SoCs that enable
+ * OF_CONTROL must have arch/gpio.h.
+ */
+
+#ifndef __ASM_ARCH_MX85XX_GPIO_H
+#define __ASM_ARCH_MX85XX_GPIO_H
+
+#endif

1.8.1.4

Applied to u-boot-mpc85xx master branch, awaiting upstream.

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