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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright © 2006-2007 Intel Corporation
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*/
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#include <linux/delay.h>
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#include <linux/export.h>
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#include <linux/i2c-algo-bit.h>
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#include <linux/i2c.h>
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#include "psb_drv.h"
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#include "psb_intel_reg.h"
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/*
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* Intel GPIO access functions
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*/
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#define I2C_RISEFALL_TIME 20
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static int get_clock(void *data)
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{
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struct gma_i2c_chan *chan = data;
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struct drm_device *dev = chan->drm_dev;
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u32 val;
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val = REG_READ(chan->reg);
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return (val & GPIO_CLOCK_VAL_IN) != 0;
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}
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static int get_data(void *data)
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{
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struct gma_i2c_chan *chan = data;
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struct drm_device *dev = chan->drm_dev;
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u32 val;
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val = REG_READ(chan->reg);
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return (val & GPIO_DATA_VAL_IN) != 0;
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}
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static void set_clock(void *data, int state_high)
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{
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struct gma_i2c_chan *chan = data;
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struct drm_device *dev = chan->drm_dev;
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u32 reserved = 0, clock_bits;
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/* On most chips, these bits must be preserved in software. */
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reserved =
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REG_READ(chan->reg) & (GPIO_DATA_PULLUP_DISABLE |
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GPIO_CLOCK_PULLUP_DISABLE);
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if (state_high)
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clock_bits = GPIO_CLOCK_DIR_IN | GPIO_CLOCK_DIR_MASK;
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else
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clock_bits = GPIO_CLOCK_DIR_OUT | GPIO_CLOCK_DIR_MASK |
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GPIO_CLOCK_VAL_MASK;
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REG_WRITE(chan->reg, reserved | clock_bits);
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udelay(I2C_RISEFALL_TIME); /* wait for the line to change state */
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}
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static void set_data(void *data, int state_high)
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{
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struct gma_i2c_chan *chan = data;
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struct drm_device *dev = chan->drm_dev;
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u32 reserved = 0, data_bits;
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/* On most chips, these bits must be preserved in software. */
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reserved =
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REG_READ(chan->reg) & (GPIO_DATA_PULLUP_DISABLE |
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GPIO_CLOCK_PULLUP_DISABLE);
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if (state_high)
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data_bits = GPIO_DATA_DIR_IN | GPIO_DATA_DIR_MASK;
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else
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data_bits =
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GPIO_DATA_DIR_OUT | GPIO_DATA_DIR_MASK |
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GPIO_DATA_VAL_MASK;
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REG_WRITE(chan->reg, reserved | data_bits);
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udelay(I2C_RISEFALL_TIME); /* wait for the line to change state */
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}
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/**
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* gma_i2c_create - instantiate an Intel i2c bus using the specified GPIO reg
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* @dev: DRM device
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* @reg: GPIO reg to use
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* @name: name for this bus
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*
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* Creates and registers a new i2c bus with the Linux i2c layer, for use
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* in output probing and control (e.g. DDC or SDVO control functions).
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*
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* Possible values for @reg include:
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* %GPIOA
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* %GPIOB
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* %GPIOC
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* %GPIOD
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* %GPIOE
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* %GPIOF
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* %GPIOG
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* %GPIOH
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* see PRM for details on how these different busses are used.
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*/
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struct gma_i2c_chan *gma_i2c_create(struct drm_device *dev, const u32 reg,
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const char *name)
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{
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struct gma_i2c_chan *chan;
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chan = kzalloc_obj(struct gma_i2c_chan);
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if (!chan)
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goto out_free;
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chan->drm_dev = dev;
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chan->reg = reg;
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snprintf(chan->base.name, I2C_NAME_SIZE, "intel drm %s", name);
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chan->base.owner = THIS_MODULE;
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chan->base.algo_data = &chan->algo;
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chan->base.dev.parent = dev->dev;
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chan->algo.setsda = set_data;
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chan->algo.setscl = set_clock;
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chan->algo.getsda = get_data;
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chan->algo.getscl = get_clock;
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chan->algo.udelay = 20;
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chan->algo.timeout = usecs_to_jiffies(2200);
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chan->algo.data = chan;
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i2c_set_adapdata(&chan->base, chan);
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if (i2c_bit_add_bus(&chan->base))
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goto out_free;
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/* JJJ: raise SCL and SDA? */
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set_data(chan, 1);
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set_clock(chan, 1);
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udelay(20);
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return chan;
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out_free:
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kfree(chan);
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return NULL;
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}
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/**
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* gma_i2c_destroy - unregister and free i2c bus resources
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* @chan: channel to free
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*
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* Unregister the adapter from the i2c layer, then free the structure.
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*/
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void gma_i2c_destroy(struct gma_i2c_chan *chan)
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{
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if (!chan)
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return;
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i2c_del_adapter(&chan->base);
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kfree(chan);
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}
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