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Date: Tue, 22 May 2012 17:09:03 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<fmhess@...rs.sourceforge.net>, <gregkh@...uxfoundation.org>
Subject: [PATCH] staging: comedi: remove this_board macro in the pcl812 driver
The 'this_board' macro depends on having a local variable with
a magic name. The CodingStyle document suggests not doing this
to avoid confusion. Remove the macro and use the comedi_board()
inline helper to get the dev->board_ptr information.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Mori Hess <fmhess@...rs.sourceforge.net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c
index 51f4ca9..28780ed 100644
--- a/drivers/staging/comedi/drivers/pcl812.c
+++ b/drivers/staging/comedi/drivers/pcl812.c
@@ -336,8 +336,6 @@ struct pcl812_board {
unsigned char haveMPC508; /* 1=board use MPC508A multiplexor */
};
-#define this_board ((const struct pcl812_board *)dev->board_ptr)
-
struct pcl812_private {
unsigned char valid; /* =1 device is OK */
@@ -560,6 +558,7 @@ static void pcl812_cmdtest_out(int e, struct comedi_cmd *cmd)
static int pcl812_ai_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_cmd *cmd)
{
+ const struct pcl812_board *board = comedi_board(dev);
int err = 0;
int tmp, divisor1, divisor2;
@@ -666,8 +665,8 @@ static int pcl812_ai_cmdtest(struct comedi_device *dev,
}
if (cmd->convert_src == TRIG_TIMER) {
- if (cmd->convert_arg < this_board->ai_ns_min) {
- cmd->convert_arg = this_board->ai_ns_min;
+ if (cmd->convert_arg < board->ai_ns_min) {
+ cmd->convert_arg = board->ai_ns_min;
err++;
}
} else { /* TRIG_EXT */
@@ -682,7 +681,7 @@ static int pcl812_ai_cmdtest(struct comedi_device *dev,
err++;
}
if (cmd->chanlist_len > MAX_CHANLIST_LEN) {
- cmd->chanlist_len = this_board->n_aichan;
+ cmd->chanlist_len = board->n_aichan;
err++;
}
if (cmd->scan_end_arg != cmd->chanlist_len) {
@@ -715,11 +714,11 @@ static int pcl812_ai_cmdtest(struct comedi_device *dev,
if (cmd->convert_src == TRIG_TIMER) {
tmp = cmd->convert_arg;
- i8253_cascade_ns_to_timer(this_board->i8254_osc_base, &divisor1,
+ i8253_cascade_ns_to_timer(board->i8254_osc_base, &divisor1,
&divisor2, &cmd->convert_arg,
cmd->flags & TRIG_ROUND_MASK);
- if (cmd->convert_arg < this_board->ai_ns_min)
- cmd->convert_arg = this_board->ai_ns_min;
+ if (cmd->convert_arg < board->ai_ns_min)
+ cmd->convert_arg = board->ai_ns_min;
if (tmp != cmd->convert_arg)
err++;
}
@@ -741,6 +740,7 @@ static int pcl812_ai_cmdtest(struct comedi_device *dev,
*/
static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
+ const struct pcl812_board *board = comedi_board(dev);
unsigned int divisor1 = 0, divisor2 = 0, i, dma_flags, bytes;
struct comedi_cmd *cmd = &s->async->cmd;
@@ -767,9 +767,9 @@ static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
return -EINVAL;
if (cmd->convert_src == TRIG_TIMER) {
- if (cmd->convert_arg < this_board->ai_ns_min)
- cmd->convert_arg = this_board->ai_ns_min;
- i8253_cascade_ns_to_timer(this_board->i8254_osc_base,
+ if (cmd->convert_arg < board->ai_ns_min)
+ cmd->convert_arg = board->ai_ns_min;
+ i8253_cascade_ns_to_timer(board->i8254_osc_base,
&divisor1, &divisor2,
&cmd->convert_arg,
cmd->flags & TRIG_ROUND_MASK);
@@ -1192,6 +1192,7 @@ static void start_pacer(struct comedi_device *dev, int mode,
*/
static void free_resources(struct comedi_device *dev)
{
+ const struct pcl812_board *board = comedi_board(dev);
if (dev->private) {
if (devpriv->dmabuf[0])
@@ -1204,7 +1205,7 @@ static void free_resources(struct comedi_device *dev)
if (dev->irq)
free_irq(dev->irq, dev);
if (dev->iobase)
- release_region(dev->iobase, this_board->io_range);
+ release_region(dev->iobase, board->io_range);
}
/*
@@ -1234,6 +1235,8 @@ static int pcl812_ai_cancel(struct comedi_device *dev,
*/
static void pcl812_reset(struct comedi_device *dev)
{
+ const struct pcl812_board *board = comedi_board(dev);
+
#ifdef PCL812_EXTDEBUG
printk(KERN_DEBUG "pcl812 EDBG: BGN: pcl812_reset(...)\n");
#endif
@@ -1242,7 +1245,7 @@ static void pcl812_reset(struct comedi_device *dev)
devpriv->old_chan_reg = -1; /* invalidate chain/gain memory */
devpriv->old_gain_reg = -1;
- switch (this_board->board_type) {
+ switch (board->board_type) {
case boardPCL812PG:
case boardPCL812:
case boardACL8112:
@@ -1273,6 +1276,7 @@ static void pcl812_reset(struct comedi_device *dev)
static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
+ const struct pcl812_board *board = comedi_board(dev);
int ret, subdev;
unsigned long iobase;
unsigned int irq;
@@ -1283,9 +1287,9 @@ static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
iobase = it->options[0];
printk(KERN_INFO "comedi%d: pcl812: board=%s, ioport=0x%03lx",
- dev->minor, this_board->name, iobase);
+ dev->minor, board->name, iobase);
- if (!request_region(iobase, this_board->io_range, "pcl812")) {
+ if (!request_region(iobase, board->io_range, "pcl812")) {
printk("I/O port conflict\n");
return -EIO;
}
@@ -1297,13 +1301,13 @@ static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
return ret; /* Can't alloc mem */
}
- dev->board_name = this_board->name;
+ dev->board_name = board->name;
irq = 0;
- if (this_board->IRQbits != 0) { /* board support IRQ */
+ if (board->IRQbits != 0) { /* board support IRQ */
irq = it->options[1];
if (irq) { /* we want to use IRQ */
- if (((1 << irq) & this_board->IRQbits) == 0) {
+ if (((1 << irq) & board->IRQbits) == 0) {
printk
(", IRQ %u is out of allowed range, "
"DISABLING IT", irq);
@@ -1328,9 +1332,9 @@ static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
devpriv->dma = dma;
if (!dev->irq)
goto no_dma; /* if we haven't IRQ, we can't use DMA */
- if (this_board->DMAbits != 0) { /* board support DMA */
+ if (board->DMAbits != 0) { /* board support DMA */
dma = it->options[2];
- if (((1 << dma) & this_board->DMAbits) == 0) {
+ if (((1 << dma) & board->DMAbits) == 0) {
printk(", DMA is out of allowed range, FAIL!\n");
return -EINVAL; /* Bad DMA */
}
@@ -1369,13 +1373,13 @@ static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
no_dma:
n_subdevices = 0;
- if (this_board->n_aichan > 0)
+ if (board->n_aichan > 0)
n_subdevices++;
- if (this_board->n_aochan > 0)
+ if (board->n_aochan > 0)
n_subdevices++;
- if (this_board->n_dichan > 0)
+ if (board->n_dichan > 0)
n_subdevices++;
- if (this_board->n_dochan > 0)
+ if (board->n_dochan > 0)
n_subdevices++;
ret = alloc_subdevices(dev, n_subdevices);
@@ -1387,46 +1391,46 @@ no_dma:
subdev = 0;
/* analog input */
- if (this_board->n_aichan > 0) {
+ if (board->n_aichan > 0) {
s = dev->subdevices + subdev;
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE;
- switch (this_board->board_type) {
+ switch (board->board_type) {
case boardA821:
if (it->options[2] == 1) {
- s->n_chan = this_board->n_aichan_diff;
+ s->n_chan = board->n_aichan_diff;
s->subdev_flags |= SDF_DIFF;
devpriv->use_diff = 1;
} else {
- s->n_chan = this_board->n_aichan;
+ s->n_chan = board->n_aichan;
s->subdev_flags |= SDF_GROUND;
}
break;
case boardACL8112:
case boardACL8216:
if (it->options[4] == 1) {
- s->n_chan = this_board->n_aichan_diff;
+ s->n_chan = board->n_aichan_diff;
s->subdev_flags |= SDF_DIFF;
devpriv->use_diff = 1;
} else {
- s->n_chan = this_board->n_aichan;
+ s->n_chan = board->n_aichan;
s->subdev_flags |= SDF_GROUND;
}
break;
default:
- s->n_chan = this_board->n_aichan;
+ s->n_chan = board->n_aichan;
s->subdev_flags |= SDF_GROUND;
break;
}
- s->maxdata = this_board->ai_maxdata;
+ s->maxdata = board->ai_maxdata;
s->len_chanlist = MAX_CHANLIST_LEN;
- s->range_table = this_board->rangelist_ai;
- if (this_board->board_type == boardACL8216)
+ s->range_table = board->rangelist_ai;
+ if (board->board_type == boardACL8216)
s->insn_read = acl8216_ai_insn_read;
else
s->insn_read = pcl812_ai_insn_read;
- devpriv->use_MPC = this_board->haveMPC508;
+ devpriv->use_MPC = board->haveMPC508;
s->cancel = pcl812_ai_cancel;
if (dev->irq) {
dev->read_subdev = s;
@@ -1435,7 +1439,7 @@ no_dma:
s->do_cmd = pcl812_ai_cmd;
s->poll = pcl812_ai_poll;
}
- switch (this_board->board_type) {
+ switch (board->board_type) {
case boardPCL812PG:
if (it->options[4] == 1)
s->range_table = &range_pcl812pg2_ai;
@@ -1529,17 +1533,17 @@ no_dma:
}
/* analog output */
- if (this_board->n_aochan > 0) {
+ if (board->n_aochan > 0) {
s = dev->subdevices + subdev;
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
- s->n_chan = this_board->n_aochan;
+ s->n_chan = board->n_aochan;
s->maxdata = 0xfff;
s->len_chanlist = 1;
- s->range_table = this_board->rangelist_ao;
+ s->range_table = board->rangelist_ao;
s->insn_read = pcl812_ao_insn_read;
s->insn_write = pcl812_ao_insn_write;
- switch (this_board->board_type) {
+ switch (board->board_type) {
case boardA821:
if (it->options[3] == 1)
s->range_table = &range_unipolar10;
@@ -1558,32 +1562,32 @@ no_dma:
}
/* digital input */
- if (this_board->n_dichan > 0) {
+ if (board->n_dichan > 0) {
s = dev->subdevices + subdev;
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
- s->n_chan = this_board->n_dichan;
+ s->n_chan = board->n_dichan;
s->maxdata = 1;
- s->len_chanlist = this_board->n_dichan;
+ s->len_chanlist = board->n_dichan;
s->range_table = &range_digital;
s->insn_bits = pcl812_di_insn_bits;
subdev++;
}
/* digital output */
- if (this_board->n_dochan > 0) {
+ if (board->n_dochan > 0) {
s = dev->subdevices + subdev;
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
- s->n_chan = this_board->n_dochan;
+ s->n_chan = board->n_dochan;
s->maxdata = 1;
- s->len_chanlist = this_board->n_dochan;
+ s->len_chanlist = board->n_dochan;
s->range_table = &range_digital;
s->insn_bits = pcl812_do_insn_bits;
subdev++;
}
- switch (this_board->board_type) {
+ switch (board->board_type) {
case boardACL8216:
devpriv->ai_is16b = 1;
case boardPCL812PG:
--
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