dma40: use helpers for channel type check

The somewhat confusing check

	d40c->log_num == D40_PHY_CHAN

and its variants are used in several places to check if a channel is logical or
physical.  Use appropriately named helpers to do this to make the code more
readable.

Acked-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 32 insertions, 22 deletions

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 3d4cea3cff35..0073988cdaf6 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -306,6 +306,16 @@ static struct device *chan2dev(struct d40_chan *d40c)
         return &d40c->chan.dev->device;
 }
 
+static bool chan_is_physical(struct d40_chan *chan)
+{
+        return chan->log_num == D40_PHY_CHAN;
+}
+
+static bool chan_is_logical(struct d40_chan *chan)
+{
+        return !chan_is_physical(chan);
+}
+
 static void __iomem *chan_base(struct d40_chan *chan)
 {
         return chan->base->virtbase + D40_DREG_PCBASE +
@@ -400,7 +410,7 @@ static int d40_lcla_free_all(struct d40_chan *d40c,
         int i;
         int ret = -EINVAL;
 
-        if (d40c->log_num == D40_PHY_CHAN)
+        if (chan_is_physical(d40c))
                 return 0;
 
         spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
@@ -472,7 +482,7 @@ static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d)
 {
         int curr_lcla = -EINVAL, next_lcla;
 
-        if (d40c->log_num == D40_PHY_CHAN) {
+        if (chan_is_physical(d40c)) {
                 d40_phy_lli_write(d40c->base->virtbase,
                                   d40c->phy_chan->num,
                                   d40d->lli_phy.dst,
@@ -788,7 +798,7 @@ static u32 d40_get_prmo(struct d40_chan *d40c)
                         = D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG,
         };
 
-        if (d40c->log_num == D40_PHY_CHAN)
+        if (chan_is_physical(d40c))
                 return phy_map[d40c->dma_cfg.mode_opt];
         else
                 return log_map[d40c->dma_cfg.mode_opt];
@@ -802,7 +812,7 @@ static void d40_config_write(struct d40_chan *d40c)
         /* Odd addresses are even addresses + 4 */
         addr_base = (d40c->phy_chan->num % 2) * 4;
         /* Setup channel mode to logical or physical */
-        var = ((u32)(d40c->log_num != D40_PHY_CHAN) + 1) <<
+        var = ((u32)(chan_is_logical(d40c)) + 1) <<
                 D40_CHAN_POS(d40c->phy_chan->num);
         writel(var, d40c->base->virtbase + D40_DREG_PRMSE + addr_base);
 
@@ -811,7 +821,7 @@ static void d40_config_write(struct d40_chan *d40c)
 
         writel(var, d40c->base->virtbase + D40_DREG_PRMOE + addr_base);
 
-        if (d40c->log_num != D40_PHY_CHAN) {
+        if (chan_is_logical(d40c)) {
                 int lidx = (d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS)
                            & D40_SREG_ELEM_LOG_LIDX_MASK;
                 void __iomem *chanbase = chan_base(d40c);
@@ -830,7 +840,7 @@ static u32 d40_residue(struct d40_chan *d40c)
 {
         u32 num_elt;
 
-        if (d40c->log_num != D40_PHY_CHAN)
+        if (chan_is_logical(d40c))
                 num_elt = (readl(&d40c->lcpa->lcsp2) & D40_MEM_LCSP2_ECNT_MASK)
                         >> D40_MEM_LCSP2_ECNT_POS;
         else {
@@ -846,7 +856,7 @@ static bool d40_tx_is_linked(struct d40_chan *d40c)
 {
         bool is_link;
 
-        if (d40c->log_num != D40_PHY_CHAN)
+        if (chan_is_logical(d40c))
                 is_link = readl(&d40c->lcpa->lcsp3) &  D40_MEM_LCSP3_DLOS_MASK;
         else
                 is_link = readl(chan_base(d40c) + D40_CHAN_REG_SDLNK)
@@ -869,7 +879,7 @@ static int d40_pause(struct dma_chan *chan)
 
         res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
         if (res == 0) {
-                if (d40c->log_num != D40_PHY_CHAN) {
+                if (chan_is_logical(d40c)) {
                         d40_config_set_event(d40c, false);
                         /* Resume the other logical channels if any */
                         if (d40_chan_has_events(d40c))
@@ -895,7 +905,7 @@ static int d40_resume(struct dma_chan *chan)
         spin_lock_irqsave(&d40c->lock, flags);
 
         if (d40c->base->rev == 0)
-                if (d40c->log_num != D40_PHY_CHAN) {
+                if (chan_is_logical(d40c)) {
                         res = d40_channel_execute_command(d40c,
                                                           D40_DMA_SUSPEND_REQ);
                         goto no_suspend;
@@ -904,7 +914,7 @@ static int d40_resume(struct dma_chan *chan)
         /* If bytes left to transfer or linked tx resume job */
         if (d40_residue(d40c) || d40_tx_is_linked(d40c)) {
 
-                if (d40c->log_num != D40_PHY_CHAN)
+                if (chan_is_logical(d40c))
                         d40_config_set_event(d40c, true);
 
                 res = d40_channel_execute_command(d40c, D40_DMA_RUN);
@@ -944,7 +954,7 @@ static int d40_start(struct d40_chan *d40c)
         if (d40c->base->rev == 0) {
                 int err;
 
-                if (d40c->log_num != D40_PHY_CHAN) {
+                if (chan_is_logical(d40c)) {
                         err = d40_channel_execute_command(d40c,
                                                           D40_DMA_SUSPEND_REQ);
                         if (err)
@@ -952,7 +962,7 @@ static int d40_start(struct d40_chan *d40c)
                 }
         }
 
-        if (d40c->log_num != D40_PHY_CHAN)
+        if (chan_is_logical(d40c))
                 d40_config_set_event(d40c, true);
 
         return d40_channel_execute_command(d40c, D40_DMA_RUN);
@@ -1495,7 +1505,7 @@ static int d40_free_dma(struct d40_chan *d40c)
                 return res;
         }
 
-        if (d40c->log_num != D40_PHY_CHAN) {
+        if (chan_is_logical(d40c)) {
                 /* Release logical channel, deactivate the event line */
 
                 d40_config_set_event(d40c, false);
@@ -1548,7 +1558,7 @@ static bool d40_is_paused(struct d40_chan *d40c)
 
         spin_lock_irqsave(&d40c->lock, flags);
 
-        if (d40c->log_num == D40_PHY_CHAN) {
+        if (chan_is_physical(d40c)) {
                 if (d40c->phy_chan->num % 2 == 0)
                         active_reg = d40c->base->virtbase + D40_DREG_ACTIVE;
                 else
@@ -1638,7 +1648,7 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
         d40d->lli_current = 0;
         d40d->txd.flags = dma_flags;
 
-        if (d40c->log_num != D40_PHY_CHAN) {
+        if (chan_is_logical(d40c)) {
 
                 if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
                         dev_err(&d40c->chan.dev->device,
@@ -1765,9 +1775,9 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
 
         /* Fill in basic CFG register values */
         d40_phy_cfg(&d40c->dma_cfg, &d40c->src_def_cfg,
-                    &d40c->dst_def_cfg, d40c->log_num != D40_PHY_CHAN);
+                    &d40c->dst_def_cfg, chan_is_logical(d40c));
 
-        if (d40c->log_num != D40_PHY_CHAN) {
+        if (chan_is_logical(d40c)) {
                 d40_log_cfg(&d40c->dma_cfg,
                             &d40c->log_def.lcsp1, &d40c->log_def.lcsp3);
 
@@ -1857,7 +1867,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
 
         d40d->txd.tx_submit = d40_tx_submit;
 
-        if (d40c->log_num != D40_PHY_CHAN) {
+        if (chan_is_logical(d40c)) {
 
                 if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
                         dev_err(&d40c->chan.dev->device,
@@ -2093,7 +2103,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
         if (d40d == NULL)
                 goto err;
 
-        if (d40c->log_num != D40_PHY_CHAN)
+        if (chan_is_logical(d40c))
                 err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
                                             direction, dma_flags);
         else
@@ -2103,7 +2113,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
                 dev_err(&d40c->chan.dev->device,
                         "[%s] Failed to prepare %s slave sg job: %d\n",
                         __func__,
-                        d40c->log_num != D40_PHY_CHAN ? "log" : "phy", err);
+                        chan_is_logical(d40c) ? "log" : "phy", err);
                 goto err;
         }
 
@@ -2253,7 +2263,7 @@ static void d40_set_runtime_config(struct dma_chan *chan,
                 return;
         }
 
-        if (d40c->log_num != D40_PHY_CHAN) {
+        if (chan_is_logical(d40c)) {
                 if (config_maxburst >= 16)
                         psize = STEDMA40_PSIZE_LOG_16;
                 else if (config_maxburst >= 8)
@@ -2286,7 +2296,7 @@ static void d40_set_runtime_config(struct dma_chan *chan,
         cfg->dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL;
 
         /* Fill in register values */
-        if (d40c->log_num != D40_PHY_CHAN)
+        if (chan_is_logical(d40c))
                 d40_log_cfg(cfg, &d40c->log_def.lcsp1, &d40c->log_def.lcsp3);
         else
                 d40_phy_cfg(cfg, &d40c->src_def_cfg,