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Date: Sun, 6 Jan 2013 23:44:09 +0100
From: Linus Walleij <linus.walleij@...ricsson.com>
To: Vinod Koul <vinod.koul@...el.com>
Cc: <linux-kernel@...r.kernel.org>,
Dan Williams <dan.j.williams@...el.com>,
Anmar Oueja <anmar.oueja@...aro.org>,
Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 8/8] dma: coh901318: cut down on platform data abstraction
From: Linus Walleij <linus.walleij@...aro.org>
Since we merged the platform data into the driver we can
remove the middle-man abstraction.
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/dma/coh901318.c | 74 +++++--------------------------------------------
1 file changed, 7 insertions(+), 67 deletions(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 0604273..a2f079a 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -199,16 +199,6 @@ struct coh_dma_channel {
};
/**
- * dma_access_memory_state_t - register dma for memory access
- *
- * @dev: The dma device
- * @active: 1 means dma intends to access memory
- * 0 means dma wont access memory
- */
-typedef void (*dma_access_memory_state_t)(struct device *dev,
- bool active);
-
-/**
* struct powersave - DMA power save structure
* @lock: lock protecting data in this struct
* @started_channels: bit mask indicating active dma channels
@@ -218,22 +208,6 @@ struct powersave {
u64 started_channels;
};
-/**
- * struct coh901318_platform - platform arch structure
- * @chans_slave: specifying dma slave channels
- * @chans_memcpy: specifying dma memcpy channels
- * @access_memory_state: requesting DMA memory access (on / off)
- * @chan_conf: dma channel configurations
- * @max_channels: max number of dma chanenls
- */
-struct coh901318_platform {
- const int *chans_slave;
- const int *chans_memcpy;
- const dma_access_memory_state_t access_memory_state;
- const struct coh_dma_channel *chan_conf;
- const int max_channels;
-};
-
/* points out all dma slave channels.
* Syntax is [A1, B1, A2, B2, .... ,-1,-1]
* Select all channels from A to B, end of list is marked with -1,-1
@@ -246,15 +220,6 @@ static int dma_slave_channels[] = {
static int dma_memcpy_channels[] = {
U300_DMA_GENERAL_PURPOSE_0, U300_DMA_GENERAL_PURPOSE_8, -1, -1};
-/** register dma for memory access
- *
- * active 1 means dma intends to access memory
- * 0 means dma wont access memory
- */
-static void coh901318_access_memory_state(struct device *dev, bool active)
-{
-}
-
#define flags_memcpy_config (COH901318_CX_CFG_CH_DISABLE | \
COH901318_CX_CFG_RM_MEMORY_TO_MEMORY | \
COH901318_CX_CFG_LCR_DISABLE | \
@@ -1291,14 +1256,6 @@ const struct coh_dma_channel chan_config[U300_DMA_CHANNELS] = {
}
};
-static struct coh901318_platform coh901318_platform = {
- .chans_slave = dma_slave_channels,
- .chans_memcpy = dma_memcpy_channels,
- .access_memory_state = coh901318_access_memory_state,
- .chan_conf = chan_config,
- .max_channels = U300_DMA_CHANNELS,
-};
-
#define COHC_2_DEV(cohc) (&cohc->chan.dev->device)
#ifdef VERBOSE_DEBUG
@@ -1327,7 +1284,6 @@ struct coh901318_base {
struct dma_device dma_slave;
struct dma_device dma_memcpy;
struct coh901318_chan *chans;
- struct coh901318_platform *platform;
};
struct coh901318_chan {
@@ -1395,7 +1351,7 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf,
tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
- for (i = 0; i < debugfs_dma_base->platform->max_channels; i++)
+ for (i = 0; i < U300_DMA_CHANNELS; i++)
if (started_channels & (1 << i))
tmp += sprintf(tmp, "channel %d\n", i);
@@ -1463,13 +1419,13 @@ static inline struct coh901318_chan *to_coh901318_chan(struct dma_chan *chan)
static inline const struct coh901318_params *
cohc_chan_param(struct coh901318_chan *cohc)
{
- return &cohc->base->platform->chan_conf[cohc->id].param;
+ return &chan_config[cohc->id].param;
}
static inline const struct coh_dma_channel *
cohc_chan_conf(struct coh901318_chan *cohc)
{
- return &cohc->base->platform->chan_conf[cohc->id];
+ return &chan_config[cohc->id];
}
static void enable_powersave(struct coh901318_chan *cohc)
@@ -1481,12 +1437,6 @@ static void enable_powersave(struct coh901318_chan *cohc)
pm->started_channels &= ~(1ULL << cohc->id);
- if (!pm->started_channels) {
- /* DMA no longer intends to access memory */
- cohc->base->platform->access_memory_state(cohc->base->dev,
- false);
- }
-
spin_unlock_irqrestore(&pm->lock, flags);
}
static void disable_powersave(struct coh901318_chan *cohc)
@@ -1496,12 +1446,6 @@ static void disable_powersave(struct coh901318_chan *cohc)
spin_lock_irqsave(&pm->lock, flags);
- if (!pm->started_channels) {
- /* DMA intends to access memory */
- cohc->base->platform->access_memory_state(cohc->base->dev,
- true);
- }
-
pm->started_channels |= (1ULL << cohc->id);
spin_unlock_irqrestore(&pm->lock, flags);
@@ -1860,7 +1804,7 @@ static int coh901318_config(struct coh901318_chan *cohc,
if (param)
p = param;
else
- p = &cohc->base->platform->chan_conf[channel].param;
+ p = cohc_chan_param(cohc);
/* Clear any pending BE or TC interrupt */
if (channel < 32) {
@@ -2695,7 +2639,6 @@ void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
static int __init coh901318_probe(struct platform_device *pdev)
{
int err = 0;
- struct coh901318_platform *pdata;
struct coh901318_base *base;
int irq;
struct resource *io;
@@ -2711,11 +2654,9 @@ static int __init coh901318_probe(struct platform_device *pdev)
pdev->dev.driver->name) == NULL)
return -ENOMEM;
- pdata = &coh901318_platform,
-
base = devm_kzalloc(&pdev->dev,
ALIGN(sizeof(struct coh901318_base), 4) +
- pdata->max_channels *
+ U300_DMA_CHANNELS *
sizeof(struct coh901318_chan),
GFP_KERNEL);
if (!base)
@@ -2728,7 +2669,6 @@ static int __init coh901318_probe(struct platform_device *pdev)
return -ENOMEM;
base->dev = &pdev->dev;
- base->platform = pdata;
spin_lock_init(&base->pm.lock);
base->pm.started_channels = 0;
@@ -2750,7 +2690,7 @@ static int __init coh901318_probe(struct platform_device *pdev)
return err;
/* init channels for device transfers */
- coh901318_base_init(&base->dma_slave, base->platform->chans_slave,
+ coh901318_base_init(&base->dma_slave, dma_slave_channels,
base);
dma_cap_zero(base->dma_slave.cap_mask);
@@ -2770,7 +2710,7 @@ static int __init coh901318_probe(struct platform_device *pdev)
goto err_register_slave;
/* init channels for memcpy */
- coh901318_base_init(&base->dma_memcpy, base->platform->chans_memcpy,
+ coh901318_base_init(&base->dma_memcpy, dma_memcpy_channels,
base);
dma_cap_zero(base->dma_memcpy.cap_mask);
--
1.7.11.3
--
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