msm: add gpiomux api for gpio multiplex & configuration.

Add the 'gpiomux' api, which addresses the following shortcomings
of existing tlmm api:

- gpio power-collapse, which is managed by a peripheral processor on
  other targets, must be managed by the application processor on the 8x60.
- The enable/disable flag of the legacy gpio_tlmm_config api
  is not applicable on the 8x60, and causes confusion.
- The gpio 'direction' bits are meaningless for all func_sel
  configurations except for generic-gpio mode (func_sel 0), in which
  case the gpio_direction_* functions should be used.  Having these
  bits in the tlmm api leads to confusion and misuse of the gpiolib
  api, and they have been removed in gpiomux.
- The functional api of the legacy system ran contrary to the typical
  use-case, which is a single massive configuration at boot.  Rather
  than forcing hundreds of 'config' function calls, the new api
  allows data to be configured with a single table.

gpiomux_get and gpiomux_put are meant to be called automatically
when gpio_request and gpio_free are called, giving automatic
gpiomux/tlmm control to those drivers/lines with simple
power profiles - in the simplest cases, an entry in the gpiomux table
and the correct usage of gpiolib is all that is required to get proper
gpio power control.

Signed-off-by: Gregory Bean <gbean@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

1 files changed, 61 insertions, 0 deletions

diff --git a/arch/arm/mach-msm/gpiomux-v2.h b/arch/arm/mach-msm/gpiomux-v2.h
new file mode 100644
index 00000000000..3bf10e7f038
--- /dev/null
+++ b/arch/arm/mach-msm/gpiomux-v2.h
@@ -0,0 +1,61 @@
+/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#ifndef __ARCH_ARM_MACH_MSM_GPIOMUX_V2_H
+#define __ARCH_ARM_MACH_MSM_GPIOMUX_V2_H
+
+#define GPIOMUX_NGPIOS 173
+
+typedef u16 gpiomux_config_t;
+
+enum {
+	GPIOMUX_DRV_2MA  = 0UL << 6,
+	GPIOMUX_DRV_4MA  = 1UL << 6,
+	GPIOMUX_DRV_6MA  = 2UL << 6,
+	GPIOMUX_DRV_8MA  = 3UL << 6,
+	GPIOMUX_DRV_10MA = 4UL << 6,
+	GPIOMUX_DRV_12MA = 5UL << 6,
+	GPIOMUX_DRV_14MA = 6UL << 6,
+	GPIOMUX_DRV_16MA = 7UL << 6,
+};
+
+enum {
+	GPIOMUX_FUNC_GPIO = 0UL  << 2,
+	GPIOMUX_FUNC_1    = 1UL  << 2,
+	GPIOMUX_FUNC_2    = 2UL  << 2,
+	GPIOMUX_FUNC_3    = 3UL  << 2,
+	GPIOMUX_FUNC_4    = 4UL  << 2,
+	GPIOMUX_FUNC_5    = 5UL  << 2,
+	GPIOMUX_FUNC_6    = 6UL  << 2,
+	GPIOMUX_FUNC_7    = 7UL  << 2,
+	GPIOMUX_FUNC_8    = 8UL  << 2,
+	GPIOMUX_FUNC_9    = 9UL  << 2,
+	GPIOMUX_FUNC_A    = 10UL << 2,
+	GPIOMUX_FUNC_B    = 11UL << 2,
+	GPIOMUX_FUNC_C    = 12UL << 2,
+	GPIOMUX_FUNC_D    = 13UL << 2,
+	GPIOMUX_FUNC_E    = 14UL << 2,
+	GPIOMUX_FUNC_F    = 15UL << 2,
+};
+
+enum {
+	GPIOMUX_PULL_NONE   = 0UL,
+	GPIOMUX_PULL_DOWN   = 1UL,
+	GPIOMUX_PULL_KEEPER = 2UL,
+	GPIOMUX_PULL_UP     = 3UL,
+};
+
+#endif