From 1963a2afc81afe6d85e7a12538b74a9919d958ae Mon Sep 17 00:00:00 2001 From: Gregory Bean Date: Sat, 28 Aug 2010 10:05:44 -0700 Subject: 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 Signed-off-by: Daniel Walker --- arch/arm/mach-msm/gpiomux-v2.h | 61 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 arch/arm/mach-msm/gpiomux-v2.h (limited to 'arch/arm/mach-msm/gpiomux-v2.h') diff --git a/arch/arm/mach-msm/gpiomux-v2.h b/arch/arm/mach-msm/gpiomux-v2.h new file mode 100644 index 000000000000..3bf10e7f0381 --- /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 -- cgit v1.2.3-59-g8ed1b