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-rw-r--r--arch/arm/plat-spear/padmux.c164
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/arm/plat-spear/padmux.c b/arch/arm/plat-spear/padmux.c
deleted file mode 100644
index 555eec6..0000000
--- a/arch/arm/plat-spear/padmux.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * arch/arm/plat-spear/include/plat/padmux.c
- *
- * SPEAr platform specific gpio pads muxing source file
- *
- * Copyright (C) 2009 ST Microelectronics
- * Viresh Kumar<viresh.kumar@st.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <plat/padmux.h>
-
-/*
- * struct pmx: pmx definition structure
- *
- * base: base address of configuration registers
- * mode_reg: mode configurations
- * mux_reg: muxing configurations
- * active_mode: pointer to current active mode
- */
-struct pmx {
- u32 base;
- struct pmx_reg mode_reg;
- struct pmx_reg mux_reg;
- struct pmx_mode *active_mode;
-};
-
-static struct pmx *pmx;
-
-/**
- * pmx_mode_set - Enables an multiplexing mode
- * @mode - pointer to pmx mode
- *
- * It will set mode of operation in hardware.
- * Returns -ve on Err otherwise 0
- */
-static int pmx_mode_set(struct pmx_mode *mode)
-{
- u32 val;
-
- if (!mode->name)
- return -EFAULT;
-
- pmx->active_mode = mode;
-
- val = readl(pmx->base + pmx->mode_reg.offset);
- val &= ~pmx->mode_reg.mask;
- val |= mode->mask & pmx->mode_reg.mask;
- writel(val, pmx->base + pmx->mode_reg.offset);
-
- return 0;
-}
-
-/**
- * pmx_devs_enable - Enables list of devices
- * @devs - pointer to pmx device array
- * @count - number of devices to enable
- *
- * It will enable pads for all required peripherals once and only once.
- * If peripheral is not supported by current mode then request is rejected.
- * Conflicts between peripherals are not handled and peripherals will be
- * enabled in the order they are present in pmx_dev array.
- * In case of conflicts last peripheral enabled will be present.
- * Returns -ve on Err otherwise 0
- */
-static int pmx_devs_enable(struct pmx_dev **devs, u8 count)
-{
- u32 val, i, mask;
-
- if (!count)
- return -EINVAL;
-
- val = readl(pmx->base + pmx->mux_reg.offset);
- for (i = 0; i < count; i++) {
- u8 j = 0;
-
- if (!devs[i]->name || !devs[i]->modes) {
- printk(KERN_ERR "padmux: dev name or modes is null\n");
- continue;
- }
- /* check if peripheral exists in active mode */
- if (pmx->active_mode) {
- bool found = false;
- for (j = 0; j < devs[i]->mode_count; j++) {
- if (devs[i]->modes[j].ids &
- pmx->active_mode->id) {
- found = true;
- break;
- }
- }
- if (found == false) {
- printk(KERN_ERR "%s device not available in %s"\
- "mode\n", devs[i]->name,
- pmx->active_mode->name);
- continue;
- }
- }
-
- /* enable peripheral */
- mask = devs[i]->modes[j].mask & pmx->mux_reg.mask;
- if (devs[i]->enb_on_reset)
- val &= ~mask;
- else
- val |= mask;
-
- devs[i]->is_active = true;
- }
- writel(val, pmx->base + pmx->mux_reg.offset);
- kfree(pmx);
-
- /* this will ensure that multiplexing can't be changed now */
- pmx = (struct pmx *)-1;
-
- return 0;
-}
-
-/**
- * pmx_register - registers a platform requesting pad mux feature
- * @driver - pointer to driver structure containing driver specific parameters
- *
- * Also this must be called only once. This will allocate memory for pmx
- * structure, will call pmx_mode_set, will call pmx_devs_enable.
- * Returns -ve on Err otherwise 0
- */
-int pmx_register(struct pmx_driver *driver)
-{
- int ret = 0;
-
- if (pmx)
- return -EPERM;
- if (!driver->base || !driver->devs)
- return -EFAULT;
-
- pmx = kzalloc(sizeof(*pmx), GFP_KERNEL);
- if (!pmx)
- return -ENOMEM;
-
- pmx->base = (u32)driver->base;
- pmx->mode_reg.offset = driver->mode_reg.offset;
- pmx->mode_reg.mask = driver->mode_reg.mask;
- pmx->mux_reg.offset = driver->mux_reg.offset;
- pmx->mux_reg.mask = driver->mux_reg.mask;
-
- /* choose mode to enable */
- if (driver->mode) {
- ret = pmx_mode_set(driver->mode);
- if (ret)
- goto pmx_fail;
- }
- ret = pmx_devs_enable(driver->devs, driver->devs_count);
- if (ret)
- goto pmx_fail;
-
- return 0;
-
-pmx_fail:
- return ret;
-}