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From:   Ansuel Smith <ansuelsmth@gmail.com>
To:     Rob Herring <robh+dt@kernel.org>
Cc:     Ansuel Smith <ansuelsmth@gmail.com>,
        Amit Kucheria <amit.kucheria@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>, linux-pm@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org
Subject: [PATCH v4 2/7] drivers: thermal: tsens: try load regmap from parent for 8960
Date:   Thu, 16 Jul 2020 04:28:11 +0200
Message-Id: <20200716022817.30439-3-ansuelsmth@gmail.com>
In-Reply-To: <20200716022817.30439-1-ansuelsmth@gmail.com>
References: <20200716022817.30439-1-ansuelsmth@gmail.com>
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Devices based on 8060 tsens driver (ipq8064) use the reg of the gcc
driver. Try to load the regmap of the parent as they share the same
regs.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
 drivers/thermal/qcom/tsens-8960.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 2a28a5af209e..45788eb3c666 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -7,6 +7,7 @@
 #include <linux/delay.h>
 #include <linux/bitops.h>
 #include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
 #include <linux/thermal.h>
 #include "tsens.h"
 
@@ -168,8 +169,17 @@ static int init_8960(struct tsens_priv *priv)
 	u32 reg_cntl;
 
 	priv->tm_map = dev_get_regmap(priv->dev, NULL);
-	if (!priv->tm_map)
+	if (!priv->tm_map) {
+		struct device *parent = priv->dev->parent;
+
+		if (parent)
+			priv->tm_map = syscon_node_to_regmap(parent->of_node);
+	}
+
+	if (!priv->tm_map || IS_ERR(priv->tm_map)) {
+		dev_err(priv->dev, "failed to get tsens regmap\n");
 		return -ENODEV;
+	}
 
 	/*
 	 * The status registers for each sensor are discontiguous
-- 
2.27.0