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authorAndres Salomon <dilinger@collabora.co.uk>2009-12-15 05:00:32 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 19:53:27 +0300
commit5f0a96b044d8edaee20f4a32ef6c393599ca55f8 (patch)
treea46994e95854d1771ea6829826793f8bceb39751 /include/linux/cs5535.h
parent1f2f38d89d1eced2079189cd880eeacee378370a (diff)
downloadlinux-5f0a96b044d8edaee20f4a32ef6c393599ca55f8.tar.xz
cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support
This creates a CS5535/CS5536 GPIO driver which uses a gpio_chip backend (allowing GPIO users to use the generic GPIO API if desired) while also allowing architecture-specific users directly (via the cs5535_gpio_* functions). Tested on an OLPC machine. Some Leemotes also use CS5536 (with a mips cpu), which is why this is in drivers/gpio rather than arch/x86. Currently, it conflicts with older geode GPIO support; once MFGPT support is reworked to also be more generic, the older geode code will be removed. Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: David Brownell <david-b@pacbell.net> Reviewed-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/cs5535.h')
-rw-r--r--include/linux/cs5535.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/include/linux/cs5535.h b/include/linux/cs5535.h
new file mode 100644
index 000000000000..cfea689dfa34
--- /dev/null
+++ b/include/linux/cs5535.h
@@ -0,0 +1,58 @@
+/*
+ * AMD CS5535/CS5536 definitions
+ * Copyright (C) 2006 Advanced Micro Devices, Inc.
+ * Copyright (C) 2009 Andres Salomon <dilinger@collabora.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#ifndef _CS5535_H
+#define _CS5535_H
+
+/* MSRs */
+#define MSR_LBAR_SMB 0x5140000B
+#define MSR_LBAR_GPIO 0x5140000C
+#define MSR_LBAR_MFGPT 0x5140000D
+#define MSR_LBAR_ACPI 0x5140000E
+#define MSR_LBAR_PMS 0x5140000F
+
+/* resource sizes */
+#define LBAR_GPIO_SIZE 0xFF
+#define LBAR_MFGPT_SIZE 0x40
+#define LBAR_ACPI_SIZE 0x40
+#define LBAR_PMS_SIZE 0x80
+
+/* GPIOs */
+#define GPIO_OUTPUT_VAL 0x00
+#define GPIO_OUTPUT_ENABLE 0x04
+#define GPIO_OUTPUT_OPEN_DRAIN 0x08
+#define GPIO_OUTPUT_INVERT 0x0C
+#define GPIO_OUTPUT_AUX1 0x10
+#define GPIO_OUTPUT_AUX2 0x14
+#define GPIO_PULL_UP 0x18
+#define GPIO_PULL_DOWN 0x1C
+#define GPIO_INPUT_ENABLE 0x20
+#define GPIO_INPUT_INVERT 0x24
+#define GPIO_INPUT_FILTER 0x28
+#define GPIO_INPUT_EVENT_COUNT 0x2C
+#define GPIO_READ_BACK 0x30
+#define GPIO_INPUT_AUX1 0x34
+#define GPIO_EVENTS_ENABLE 0x38
+#define GPIO_LOCK_ENABLE 0x3C
+#define GPIO_POSITIVE_EDGE_EN 0x40
+#define GPIO_NEGATIVE_EDGE_EN 0x44
+#define GPIO_POSITIVE_EDGE_STS 0x48
+#define GPIO_NEGATIVE_EDGE_STS 0x4C
+
+#define GPIO_MAP_X 0xE0
+#define GPIO_MAP_Y 0xE4
+#define GPIO_MAP_Z 0xE8
+#define GPIO_MAP_W 0xEC
+
+void cs5535_gpio_set(unsigned offset, unsigned int reg);
+void cs5535_gpio_clear(unsigned offset, unsigned int reg);
+int cs5535_gpio_isset(unsigned offset, unsigned int reg);
+
+#endif