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dmaengine: sh: rz-dmac: Add helper to check if the channel is enabled

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Add the rz_dmac_chan_is_enabled() helper to check if a channel is
enabled. This helper will be reused in subsequent patches.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260526084710.3491480-8-claudiu.beznea@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Claudiu Beznea 2026-05-26 11:46:59 +03:00 committed by Vinod Koul
parent e21aa306e8
commit 7a94c109a5
1 changed files with 8 additions and 2 deletions
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10
drivers/dma/sh/rz-dmac.c
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@ -279,6 +279,13 @@ static void rz_dmac_lmdesc_recycle(struct rz_dmac_chan *channel)
channel->lmdesc.head = lmdesc;
}
static bool rz_dmac_chan_is_enabled(struct rz_dmac_chan *channel)
{
u32 val = rz_dmac_ch_readl(channel, CHSTAT, 1);
return !!(val & CHSTAT_EN);
}
static void rz_dmac_enable_hw(struct rz_dmac_chan *channel)
{
struct dma_chan *chan = &channel->vc.chan;
@ -840,8 +847,7 @@ static int rz_dmac_device_pause(struct dma_chan *chan)
guard(spinlock_irqsave)(&channel->vc.lock);
val = rz_dmac_ch_readl(channel, CHSTAT, 1);
if (!(val & CHSTAT_EN))
if (!rz_dmac_chan_is_enabled(channel))
return 0;
rz_dmac_ch_writel(channel, CHCTRL_SETSUS, CHCTRL, 1);