From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Date: Tue, 26 May 2026 08:46:59 +0000 (+0300)
Subject: dmaengine: sh: rz-dmac: Add helper to check if the channel is enabled
X-Git-Tag: v7.2-rc1~55^2~38
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=7a94c109a5def4f0f25705a82ed5870f794ff4ed;p=thirdparty%2Fkernel%2Flinux.git

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>
---

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index d3926ecd63ac1..76bac11c217cd 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);