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Diffstat (limited to 'drivers/dma/amba-pl08x.c')
-rw-r--r--drivers/dma/amba-pl08x.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 0b7c6ce629a6..6bb8813ca275 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -106,6 +106,7 @@ struct pl08x_driver_data;
/**
* struct vendor_data - vendor-specific config parameters for PL08x derivatives
+ * @config_offset: offset to the configuration register
* @channels: the number of channels available in this variant
* @signals: the number of request signals available from the hardware
* @dualmaster: whether this version supports dual AHB masters or not.
@@ -145,6 +146,8 @@ struct pl08x_bus_data {
/**
* struct pl08x_phy_chan - holder for the physical channels
* @id: physical index to this channel
+ * @base: memory base address for this physical channel
+ * @reg_config: configuration address for this physical channel
* @lock: a lock to use when altering an instance of this struct
* @serving: the virtual channel currently being served by this physical
* channel
@@ -203,7 +206,7 @@ struct pl08x_txd {
};
/**
- * struct pl08x_dma_chan_state - holds the PL08x specific virtual channel
+ * enum pl08x_dma_chan_state - holds the PL08x specific virtual channel
* states
* @PL08X_CHAN_IDLE: the channel is idle
* @PL08X_CHAN_RUNNING: the channel has allocated a physical transport
@@ -226,9 +229,8 @@ enum pl08x_dma_chan_state {
* @phychan: the physical channel utilized by this channel, if there is one
* @name: name of channel
* @cd: channel platform data
- * @runtime_addr: address for RX/TX according to the runtime config
+ * @cfg: slave configuration
* @at: active transaction on this channel
- * @lock: a lock for this channel data
* @host: a pointer to the host (internal use)
* @state: whether the channel is idle, paused, running etc
* @slave: whether this channel is a device (slave) or for memcpy
@@ -262,7 +264,7 @@ struct pl08x_dma_chan {
* @lli_buses: bitmask to or in to LLI pointer selecting AHB port for LLI
* fetches
* @mem_buses: set to indicate memory transfers on AHB2.
- * @lock: a spinlock for this struct
+ * @lli_words: how many words are used in each LLI item for this variant
*/
struct pl08x_driver_data {
struct dma_device slave;
@@ -417,7 +419,7 @@ static void pl08x_start_next_txd(struct pl08x_dma_chan *plchan)
/* Enable the DMA channel */
/* Do not access config register until channel shows as disabled */
- while (readl(pl08x->base + PL080_EN_CHAN) & (1 << phychan->id))
+ while (readl(pl08x->base + PL080_EN_CHAN) & BIT(phychan->id))
cpu_relax();
/* Do not access config register until channel shows as inactive */
@@ -484,8 +486,8 @@ static void pl08x_terminate_phy_chan(struct pl08x_driver_data *pl08x,
writel(val, ch->reg_config);
- writel(1 << ch->id, pl08x->base + PL080_ERR_CLEAR);
- writel(1 << ch->id, pl08x->base + PL080_TC_CLEAR);
+ writel(BIT(ch->id), pl08x->base + PL080_ERR_CLEAR);
+ writel(BIT(ch->id), pl08x->base + PL080_TC_CLEAR);
}
static inline u32 get_bytes_in_cctl(u32 cctl)
@@ -1834,7 +1836,7 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
return IRQ_NONE;
for (i = 0; i < pl08x->vd->channels; i++) {
- if (((1 << i) & err) || ((1 << i) & tc)) {
+ if ((BIT(i) & err) || (BIT(i) & tc)) {
/* Locate physical channel */
struct pl08x_phy_chan *phychan = &pl08x->phy_chans[i];
struct pl08x_dma_chan *plchan = phychan->serving;
@@ -1872,7 +1874,7 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
}
spin_unlock(&plchan->vc.lock);
- mask |= (1 << i);
+ mask |= BIT(i);
}
}