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| author | Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> | 2026-05-26 11:46:59 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-06-04 20:58:32 +0530 |
| commit | 7a94c109a5def4f0f25705a82ed5870f794ff4ed (patch) | |
| tree | 684ad64dea56f3a025056b5e8628d6a76900a267 | |
| parent | e21aa306e82067457f2297ae56af4c91db86c59a (diff) | |
| download | linux-7a94c109a5def4f0f25705a82ed5870f794ff4ed.tar.gz linux-7a94c109a5def4f0f25705a82ed5870f794ff4ed.zip | |
dmaengine: sh: rz-dmac: Add helper to check if the channel is enabled
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>
| -rw-r--r-- | drivers/dma/sh/rz-dmac.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c index d3926ecd63ac..76bac11c217c 100644 --- a/drivers/dma/sh/rz-dmac.c +++ b/drivers/dma/sh/rz-dmac.c @@ -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); |