aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/plat-mxc/iomux-v3.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-14 13:42:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-14 13:42:43 -0700
commit2cf4d4514d5b43c1f3b64bd0ec8b9853bde8f1dc (patch)
treee35a625496acc6ac852846d40b8851186b9d1ac4 /arch/arm/plat-mxc/iomux-v3.c
parent44b7532b8b464f606053562400719c9c21276037 (diff)
parentce53895a5d24e0ee19fb92f56c17323fb4c9ab27 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (417 commits) MAINTAINERS: EB110ATX is not ebsa110 MAINTAINERS: update Eric Miao's email address and status fb: add support of LCD display controller on pxa168/910 (base layer) [ARM] 5552/1: ep93xx get_uart_rate(): use EP93XX_SYSCON_PWRCNT and EP93XX_SYSCON_PWRCN [ARM] pxa/sharpsl_pm: zaurus needs generic pxa suspend/resume routines [ARM] 5544/1: Trust PrimeCell resource sizes [ARM] pxa/sharpsl_pm: cleanup of gpio-related code. [ARM] pxa/sharpsl_pm: drop set_irq_type calls [ARM] pxa/sharpsl_pm: merge pxa-specific code into generic one [ARM] pxa/sharpsl_pm: merge the two sharpsl_pm.c since it's now pxa specific [ARM] sa1100: remove unused collie_pm.c [ARM] pxa: fix the conflicting non-static declarations of global_gpios[] [ARM] 5550/1: Add default configure file for w90p910 platform [ARM] 5549/1: Add clock api for w90p910 platform. [ARM] 5548/1: Add gpio api for w90p910 platform [ARM] 5551/1: Add multi-function pin api for w90p910 platform. [ARM] Make ARM_VIC_NR depend on ARM_VIC [ARM] 5546/1: ARM PL022 SSP/SPI driver v3 ARM: OMAP4: SMP: Update defconfig for OMAP4430 ARM: OMAP4: SMP: Enable SMP support for OMAP4430 ...
Diffstat (limited to 'arch/arm/plat-mxc/iomux-v3.c')
-rw-r--r--arch/arm/plat-mxc/iomux-v3.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/iomux-v3.c b/arch/arm/plat-mxc/iomux-v3.c
new file mode 100644
index 00000000000..77a078f9513
--- /dev/null
+++ b/arch/arm/plat-mxc/iomux-v3.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ * <armlinux@phytec.de>
+ *
+ * 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, or (at your option) any later version.
+ * 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.
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/gpio.h>
+
+#include <mach/hardware.h>
+#include <asm/mach/map.h>
+#include <mach/iomux-v3.h>
+
+#define IOMUX_BASE IO_ADDRESS(IOMUXC_BASE_ADDR)
+
+static unsigned long iomux_v3_pad_alloc_map[0x200 / BITS_PER_LONG];
+
+/*
+ * setups a single pin:
+ * - reserves the pin so that it is not claimed by another driver
+ * - setups the iomux according to the configuration
+ */
+int mxc_iomux_v3_setup_pad(struct pad_desc *pad)
+{
+ unsigned int pad_ofs = pad->pad_ctrl_ofs;
+
+ if (test_and_set_bit(pad_ofs >> 2, iomux_v3_pad_alloc_map))
+ return -EBUSY;
+ if (pad->mux_ctrl_ofs)
+ __raw_writel(pad->mux_mode, IOMUX_BASE + pad->mux_ctrl_ofs);
+
+ if (pad->select_input_ofs)
+ __raw_writel(pad->select_input,
+ IOMUX_BASE + pad->select_input_ofs);
+
+ if (!(pad->pad_ctrl & NO_PAD_CTRL))
+ __raw_writel(pad->pad_ctrl, IOMUX_BASE + pad->pad_ctrl_ofs);
+ return 0;
+}
+EXPORT_SYMBOL(mxc_iomux_v3_setup_pad);
+
+int mxc_iomux_v3_setup_multiple_pads(struct pad_desc *pad_list, unsigned count)
+{
+ struct pad_desc *p = pad_list;
+ int i;
+ int ret;
+
+ for (i = 0; i < count; i++) {
+ ret = mxc_iomux_v3_setup_pad(p);
+ if (ret)
+ goto setup_error;
+ p++;
+ }
+ return 0;
+
+setup_error:
+ mxc_iomux_v3_release_multiple_pads(pad_list, i);
+ return ret;
+}
+EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);
+
+void mxc_iomux_v3_release_pad(struct pad_desc *pad)
+{
+ unsigned int pad_ofs = pad->pad_ctrl_ofs;
+
+ clear_bit(pad_ofs >> 2, iomux_v3_pad_alloc_map);
+}
+EXPORT_SYMBOL(mxc_iomux_v3_release_pad);
+
+void mxc_iomux_v3_release_multiple_pads(struct pad_desc *pad_list, int count)
+{
+ struct pad_desc *p = pad_list;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ mxc_iomux_v3_release_pad(p);
+ p++;
+ }
+}
+EXPORT_SYMBOL(mxc_iomux_v3_release_multiple_pads);