linux-kernel - [PATCH V2] thermal/drivers/qoriq: fix getting tmu range

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Date: Mon, 26 Feb 2024 08:36:57 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: rafael@...nel.org,
	daniel.lezcano@...aro.org
Cc: rui.zhang@...el.com,
	linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Peng Fan <peng.fan@....com>,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH V2] thermal/drivers/qoriq: fix getting tmu range

From: Peng Fan <peng.fan@....com>

TMU Version 1 has 4 TTRCRs, while TMU Version >=2 has 16 TTRCRs.
So limit the len to 4 will report "invalid range data" for i.MX93.

This patch drop the local array with allocated ttrcr array and
able to support larger tmu ranges.

Fixes: f12d60c81fce ("thermal/drivers/qoriq: Support version 2.1")
Tested-by: Sascha Hauer <s.hauer@...gutronix.de>
Signed-off-by: Peng Fan <peng.fan@....com>
---

V2:
 Rebased to linux-next
 Add T-b
 Link to v1: https://lore.kernel.org/all/20231020081337.3141488-1-peng.fan@oss.nxp.com/

 drivers/thermal/qoriq_thermal.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 8552d2ca87ad..0cc883818878 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -62,6 +62,9 @@
 #define REGS_TTRnCR(n)	(0xf10 + 4 * (n)) /* Temperature Range n
 					   * Control Register
 					   */
+#define NUM_TTRCR_V1	4
+#define NUM_TTRCR_MAX	16
+
 #define REGS_IPBRR(n)		(0xbf8 + 4 * (n)) /* IP Block Revision
 						   * Register n
 						   */
@@ -79,6 +82,7 @@ struct qoriq_sensor {
 
 struct qoriq_tmu_data {
 	int ver;
+	u32 ttrcr[NUM_TTRCR_MAX];
 	struct regmap *regmap;
 	struct clk *clk;
 	struct qoriq_sensor	sensor[SITES_MAX];
@@ -255,17 +259,17 @@ static int qoriq_tmu_calibration(struct device *dev,
 				 struct qoriq_tmu_data *data)
 {
 	int i, val, len;
-	u32 range[4];
 	const u32 *calibration;
 	struct device_node *np = dev->of_node;
 
 	len = of_property_count_u32_elems(np, "fsl,tmu-range");
-	if (len < 0 || len > 4) {
+	if (len < 0 || (data->ver == TMU_VER1 && len > NUM_TTRCR_V1) ||
+	    (data->ver > TMU_VER1 && len > NUM_TTRCR_MAX)) {
 		dev_err(dev, "invalid range data.\n");
 		return len;
 	}
 
-	val = of_property_read_u32_array(np, "fsl,tmu-range", range, len);
+	val = of_property_read_u32_array(np, "fsl,tmu-range", data->ttrcr, len);
 	if (val != 0) {
 		dev_err(dev, "failed to read range data.\n");
 		return val;
@@ -273,7 +277,7 @@ static int qoriq_tmu_calibration(struct device *dev,
 
 	/* Init temperature range registers */
 	for (i = 0; i < len; i++)
-		regmap_write(data->regmap, REGS_TTRnCR(i), range[i]);
+		regmap_write(data->regmap, REGS_TTRnCR(i), data->ttrcr[i]);
 
 	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
 	if (calibration == NULL || len % 8) {
-- 
2.37.1