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authorMagnus Damm <damm@opensource.se>2013-03-13 20:32:13 +0900
committerSimon Horman <horms+renesas@verge.net.au>2013-04-03 10:30:24 +0900
commit119f5e448d32c11faf22fe81f6f2d78467a47149 (patch)
tree5f300b87c8cb92f6db9de3298637d4afaab2e7e8 /include/linux/platform_data
parent87bd63bfcf177daa272432482c17195f3c0ebb21 (diff)
gpio: Renesas R-Car GPIO driver V3
This patch is V3 of a GPIO driver for the R-Car series of SoCs from Renesas. This driver is designed to be reusable between multiple SoCs that share the same basic building block, but so far it has only been used on R-Car H1 (r8a7779). Each driver instance handles 32 GPIOs with individually maskable IRQs. The driver operates on a single I/O memory range and the 32 GPIOs are hooked up a single interrupt. In the case of R-Car H1 either external IRQ pins or GPIOs with interrupts can be used for on-board interupts. For external IRQs 4 pins are supported, and in the case of GPIO there are 202 GPIOS as 202 interrupts hooked up via 6 driver instances and to the GIC and the Cortex-A9 Quad. At this point this driver is interfacing as a regular platform device driver. In the future DT support will be submitted as an incremental feature patch. Signed-off-by: Magnus Damm <damm@opensource.se> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'include/linux/platform_data')
-rw-r--r--include/linux/platform_data/gpio-rcar.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/platform_data/gpio-rcar.h b/include/linux/platform_data/gpio-rcar.h
new file mode 100644
index 000000000000..bebfcd86fb80
--- /dev/null
+++ b/include/linux/platform_data/gpio-rcar.h
@@ -0,0 +1,25 @@
+/*
+ * Renesas R-Car GPIO Support
+ *
+ * Copyright (C) 2013 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __GPIO_RCAR_H__
+#define __GPIO_RCAR_H__
+
+struct gpio_rcar_config {
+ unsigned int gpio_base;
+ unsigned int irq_base;
+ unsigned int number_of_pins;
+};
+
+#endif /* __GPIO_RCAR_H__ */