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authorDaniel Vetter <daniel.vetter@ffwll.ch>2012-02-28 00:43:09 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-02-29 20:50:25 +0100
commitc167a6fc6ed78a300c29181a6caf9ae1b9993289 (patch)
tree50256d2c3320ed4b4ea8481dc6fbcdaa83505a25
parent36c785f051b21728775c9c4f2621d37d586553d0 (diff)
downloadop-kernel-dev-c167a6fc6ed78a300c29181a6caf9ae1b9993289.zip
op-kernel-dev-c167a6fc6ed78a300c29181a6caf9ae1b9993289.tar.gz
drm/i915: merge gmbus and gpio i2c adpater into one
... and directly call the newly exported i2c bit-banging functions. The code is still pretty convoluted because we only set up the gpio i2c stuff when actually falling back, resulting in more complexity than necessary. This will be fixed up in the next patch. v2: Use exported i2c_bit_algo vtable instead of exported functions. Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h2
-rw-r--r--drivers/gpu/drm/i915/intel_i2c.c38
2 files changed, 7 insertions, 33 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 63cea508..47b315c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -35,6 +35,7 @@
#include "intel_ringbuffer.h"
#include <linux/io-mapping.h>
#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
#include <drm/intel-gtt.h>
#include <linux/backlight.h>
@@ -303,6 +304,7 @@ struct intel_gmbus {
struct i2c_adapter *force_bit;
u32 reg0;
u32 gpio_reg;
+ struct i2c_algo_bit_data bit_algo;
struct drm_i915_private *dev_priv;
};
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index 9dfedb0..43dde95 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -154,29 +154,18 @@ intel_gpio_create(struct intel_gmbus *bus, u32 pin)
0,
GPIOF,
};
- struct i2c_adapter *adapter;
struct i2c_algo_bit_data *algo;
if (pin >= ARRAY_SIZE(map_pin_to_reg) || !map_pin_to_reg[pin])
return NULL;
- adapter = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL);
- if (adapter == NULL)
- return NULL;
-
- algo = kzalloc(sizeof(struct i2c_algo_bit_data), GFP_KERNEL);
- if (algo == NULL)
- goto out_adap;
+ algo = &bus->bit_algo;
bus->gpio_reg = map_pin_to_reg[pin];
if (HAS_PCH_SPLIT(dev_priv->dev))
bus->gpio_reg += PCH_GPIOA - GPIOA;
- snprintf(adapter->name, sizeof(adapter->name),
- "i915 GPIO%c", "?BACDE?F"[pin]);
- adapter->owner = THIS_MODULE;
- adapter->algo_data = algo;
- adapter->dev.parent = &dev_priv->dev->pdev->dev;
+ bus->adapter.algo_data = algo;
algo->setsda = set_data;
algo->setscl = set_clock;
algo->getsda = get_data;
@@ -185,16 +174,7 @@ intel_gpio_create(struct intel_gmbus *bus, u32 pin)
algo->timeout = usecs_to_jiffies(2200);
algo->data = bus;
- if (i2c_bit_add_bus(adapter))
- goto out_algo;
-
- return adapter;
-
-out_algo:
- kfree(algo);
-out_adap:
- kfree(adapter);
- return NULL;
+ return &bus->adapter;
}
static int
@@ -213,7 +193,7 @@ intel_i2c_quirk_xfer(struct intel_gmbus *bus,
set_clock(bus, 1);
udelay(I2C_RISEFALL_TIME);
- ret = adapter->algo->master_xfer(adapter, msgs, num);
+ ret = i2c_bit_algo.master_xfer(adapter, msgs, num);
set_data(bus, 1);
set_clock(bus, 1);
@@ -353,7 +333,7 @@ static u32 gmbus_func(struct i2c_adapter *adapter)
adapter);
if (bus->force_bit)
- bus->force_bit->algo->functionality(bus->force_bit);
+ i2c_bit_algo.functionality(bus->force_bit);
return (I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
/* I2C_FUNC_10BIT_ADDR | */
@@ -449,9 +429,6 @@ void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit)
}
} else {
if (bus->force_bit) {
- i2c_del_adapter(bus->force_bit);
- kfree(bus->force_bit->algo);
- kfree(bus->force_bit);
bus->force_bit = NULL;
}
}
@@ -467,11 +444,6 @@ void intel_teardown_gmbus(struct drm_device *dev)
for (i = 0; i < GMBUS_NUM_PORTS; i++) {
struct intel_gmbus *bus = &dev_priv->gmbus[i];
- if (bus->force_bit) {
- i2c_del_adapter(bus->force_bit);
- kfree(bus->force_bit->algo);
- kfree(bus->force_bit);
- }
i2c_del_adapter(&bus->adapter);
}
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