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authorSylvain Lemieux <slemieux@tycoint.com>2015-07-27 17:37:36 (GMT)
committerTom Rini <trini@konsulko.com>2015-08-17 12:11:05 (GMT)
commit2783fe6903f58e4d18ba72f044fa9ebffc6df810 (patch)
treee62e72f8230a723af4ba0900a6b6474cd0ab680f /arch/arm
parent576007aec9a4a5f4f3dd1f690fb26a8c05ceb75f (diff)
downloadu-boot-2783fe6903f58e4d18ba72f044fa9ebffc6df810.tar.xz
arm: lpc32xx: gpio macro for pin mapping
Add LPC32xx GPIO interface macro for pin mapping. Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/include/asm/arch-lpc32xx/gpio_grp.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h b/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h
new file mode 100644
index 0000000..c9cf9df
--- /dev/null
+++ b/arch/arm/include/asm/arch-lpc32xx/gpio_grp.h
@@ -0,0 +1,40 @@
+/*
+ * LPC32xx GPIO interface macro for pin mapping.
+ *
+ * (C) Copyright 2015 DENX Software Engineering GmbH
+ * Written-by: Sylvain Lemieux <slemieux@@tycoint.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _LPC32XX_GPIO_GRP_H
+#define _LPC32XX_GPIO_GRP_H
+
+/*
+ * Macro to map the pin for the lpc32xx_gpio driver.
+ * Note: - GPIOS are considered here as homogeneous and linear, from 0 to 127;
+ * mapping is done per register, as group of 32.
+ * (see drivers/gpio/lpc32xx_gpio.c for details).
+ * - macros can be use with the following pins:
+ * P0.0 - P0.7
+ * P1.0 - P1.23
+ * P2.0 - P2.12
+ * P3 GPI_0 - GPI_9 / GPI_15 - GPI_23 / GPI_25 / GPI_27 - GPI_28
+ * P3 GPO_0 - GPO_23
+ * P3 GPIO_0 - GPIO_5 (output register only)
+ */
+#define LPC32XX_GPIO_P0_GRP 0
+#define LPC32XX_GPIO_P1_GRP 32
+#define LPC32XX_GPIO_P2_GRP 64
+#define LPC32XX_GPI_P3_GRP 96
+#define LPC32XX_GPO_P3_GRP 96
+#define LPC32XX_GPIO_P3_GRP (LPC32XX_GPO_P3_GRP + 25)
+
+/*
+ * A specific GPIO can be selected with this macro
+ * ie, GPIO P0.1 can be selected with LPC32XX_GPIO(LPC32XX_GPIO_P0_GRP, 1)
+ * See the LPC32x0 User's guide for GPIO group numbers
+ */
+#define LPC32XX_GPIO(x, y) ((x) + (y))
+
+#endif /* _LPC32XX_GPIO_GRP_H */