linux-kernel - [PATCH v4 10/10] drivers: qcom: rpmh-rsc: read_tcs_reg()/write_tcs

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Message-Id: <20200413100321.v4.10.I2adf93809c692d0b673e1a86ea97c45644aa8d97@changeid>
Date:   Mon, 13 Apr 2020 10:04:15 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Maulik Shah <mkshah@...eaurora.org>
Cc:     swboyd@...omium.org, mka@...omium.org,
        Rajendra Nayak <rnayak@...eaurora.org>, evgreen@...omium.org,
        Lina Iyer <ilina@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 10/10] drivers: qcom: rpmh-rsc: read_tcs_reg()/write_tcs_reg() are not for IRQ

The RSC_DRV_IRQ_ENABLE, RSC_DRV_IRQ_STATUS, and RSC_DRV_IRQ_CLEAR
registers are not part of TCS 0.  Let's not pretend that they are by
using read_tcs_reg() and write_tcs_reg() and passing a bogus tcs_id of
0.  We could introduce a new wrapper for these registers but it
wouldn't buy us much.  Let's just read/write directly.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
Reviewed-by: Maulik Shah <mkshah@...eaurora.org>
Tested-by: Maulik Shah <mkshah@...eaurora.org>
---

Changes in v4: None
Changes in v3:
- ("...are not for IRQ") is new for v3.

Changes in v2: None

 drivers/soc/qcom/rpmh-rsc.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 9bd0c7c3db7c..3c77a0eed90d 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -363,12 +363,12 @@ static void enable_tcs_irq(struct rsc_drv *drv, int tcs_id, bool enable)
 {
 	u32 data;
 
-	data = read_tcs_reg(drv, RSC_DRV_IRQ_ENABLE, 0);
+	data = readl_relaxed(drv->tcs_base + RSC_DRV_IRQ_ENABLE);
 	if (enable)
 		data |= BIT(tcs_id);
 	else
 		data &= ~BIT(tcs_id);
-	write_tcs_reg(drv, RSC_DRV_IRQ_ENABLE, 0, data);
+	writel_relaxed(data, drv->tcs_base + RSC_DRV_IRQ_ENABLE);
 }
 
 /**
@@ -389,7 +389,7 @@ static irqreturn_t tcs_tx_done(int irq, void *p)
 	const struct tcs_request *req;
 	struct tcs_cmd *cmd;
 
-	irq_status = read_tcs_reg(drv, RSC_DRV_IRQ_STATUS, 0);
+	irq_status = readl_relaxed(drv->tcs_base + RSC_DRV_IRQ_STATUS);
 
 	for_each_set_bit(i, &irq_status, BITS_PER_LONG) {
 		req = get_req_from_tcs(drv, i);
@@ -426,7 +426,7 @@ static irqreturn_t tcs_tx_done(int irq, void *p)
 		/* Reclaim the TCS */
 		write_tcs_reg(drv, RSC_DRV_CMD_ENABLE, i, 0);
 		write_tcs_reg(drv, RSC_DRV_CMD_WAIT_FOR_CMPL, i, 0);
-		write_tcs_reg(drv, RSC_DRV_IRQ_CLEAR, 0, BIT(i));
+		writel_relaxed(BIT(i), drv->tcs_base + RSC_DRV_IRQ_CLEAR);
 		spin_lock(&drv->lock);
 		clear_bit(i, drv->tcs_in_use);
 		/*
@@ -968,7 +968,8 @@ static int rpmh_rsc_probe(struct platform_device *pdev)
 	}
 
 	/* Enable the active TCS to send requests immediately */
-	write_tcs_reg(drv, RSC_DRV_IRQ_ENABLE, 0, drv->tcs[ACTIVE_TCS].mask);
+	writel_relaxed(drv->tcs[ACTIVE_TCS].mask,
+		       drv->tcs_base + RSC_DRV_IRQ_ENABLE);
 
 	spin_lock_init(&drv->client.cache_lock);
 	INIT_LIST_HEAD(&drv->client.cache);
-- 
2.26.0.110.g2183baf09c-goog