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author | Viresh Kumar <viresh.kumar@st.com> | 2012-04-03 17:27:10 +0530 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2012-04-22 22:49:26 +0200 |
commit | 8076dd1b7deeaeb5c6f0b58be95c0a13164e1a99 (patch) | |
tree | 96e3741dec72d84de577b23c9e821a27bf371f63 /arch/arm/plat-spear | |
parent | 52130b6033c580c27d968f64cd73209c9609e4e0 (diff) | |
download | linux-3.10-8076dd1b7deeaeb5c6f0b58be95c0a13164e1a99.tar.gz linux-3.10-8076dd1b7deeaeb5c6f0b58be95c0a13164e1a99.tar.bz2 linux-3.10-8076dd1b7deeaeb5c6f0b58be95c0a13164e1a99.zip |
SPEAr: Remove existing padmux support for SPEAr
We must use pinctrl framework instead of defining per SoC pinmux drivers. This
patch removes existing padmux support present for SPEAr platform.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Stephen Warren <swarren@wwwdotorg.org>
Diffstat (limited to 'arch/arm/plat-spear')
-rw-r--r-- | arch/arm/plat-spear/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/plat-spear/include/plat/padmux.h | 92 | ||||
-rw-r--r-- | arch/arm/plat-spear/padmux.c | 164 |
3 files changed, 1 insertions, 257 deletions
diff --git a/arch/arm/plat-spear/Makefile b/arch/arm/plat-spear/Makefile index 4af6258d0fe..7744802c83e 100644 --- a/arch/arm/plat-spear/Makefile +++ b/arch/arm/plat-spear/Makefile @@ -5,4 +5,4 @@ # Common support obj-y := clock.o restart.o time.o pl080.o -obj-$(CONFIG_ARCH_SPEAR3XX) += shirq.o padmux.o +obj-$(CONFIG_ARCH_SPEAR3XX) += shirq.o diff --git a/arch/arm/plat-spear/include/plat/padmux.h b/arch/arm/plat-spear/include/plat/padmux.h deleted file mode 100644 index 877f3adcf61..00000000000 --- a/arch/arm/plat-spear/include/plat/padmux.h +++ /dev/null @@ -1,92 +0,0 @@ -/* - * arch/arm/plat-spear/include/plat/padmux.h - * - * SPEAr platform specific gpio pads muxing 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. - */ - -#ifndef __PLAT_PADMUX_H -#define __PLAT_PADMUX_H - -#include <linux/types.h> - -/* - * struct pmx_reg: configuration structure for mode reg and mux reg - * - * offset: offset of mode reg - * mask: mask of mode reg - */ -struct pmx_reg { - u32 offset; - u32 mask; -}; - -/* - * struct pmx_dev_mode: configuration structure every group of modes of a device - * - * ids: all modes for this configuration - * mask: mask for supported mode - */ -struct pmx_dev_mode { - u32 ids; - u32 mask; -}; - -/* - * struct pmx_mode: mode definition structure - * - * name: mode name - * mask: mode mask - */ -struct pmx_mode { - char *name; - u32 id; - u32 mask; -}; - -/* - * struct pmx_dev: device definition structure - * - * name: device name - * modes: device configuration array for different modes supported - * mode_count: size of modes array - * is_active: is peripheral active/enabled - * enb_on_reset: if 1, mask bits to be cleared in reg otherwise to be set in reg - */ -struct pmx_dev { - char *name; - struct pmx_dev_mode *modes; - u8 mode_count; - bool is_active; - bool enb_on_reset; -}; - -/* - * struct pmx_driver: driver definition structure - * - * mode: mode to be set - * devs: array of pointer to pmx devices - * devs_count: ARRAY_SIZE of devs - * base: base address of soc config registers - * mode_reg: structure of mode config register - * mux_reg: structure of device mux config register - */ -struct pmx_driver { - struct pmx_mode *mode; - struct pmx_dev **devs; - u8 devs_count; - u32 *base; - struct pmx_reg mode_reg; - struct pmx_reg mux_reg; -}; - -/* pmx functions */ -int pmx_register(struct pmx_driver *driver); - -#endif /* __PLAT_PADMUX_H */ diff --git a/arch/arm/plat-spear/padmux.c b/arch/arm/plat-spear/padmux.c deleted file mode 100644 index 555eec6dc1c..00000000000 --- 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; -} |