drivers/thermal/rcar_gen3_thermal: add reading fuses for Gen4

The registers are differently named and at different offsets, but their
functionality is the same as for Gen3.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230511192220.7523-4-wsa+renesas@sang-engineering.com

diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
index 39b382e..9029d01 100644 (file)
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -35,6 +35,12 @@
 #define REG_GEN3_PTAT2         0x60
 #define REG_GEN3_PTAT3         0x64
 #define REG_GEN3_THSCP         0x68
+#define REG_GEN4_THSFMON00     0x180
+#define REG_GEN4_THSFMON01     0x184
+#define REG_GEN4_THSFMON02     0x188
+#define REG_GEN4_THSFMON15     0x1BC
+#define REG_GEN4_THSFMON16     0x1C0
+#define REG_GEN4_THSFMON17     0x1C4
 
 /* IRQ{STR,MSK,EN} bits */
 #define IRQ_TEMP1              BIT(0)
@@ -55,6 +61,7 @@
 
 #define MCELSIUS(temp) ((temp) * 1000)
 #define GEN3_FUSE_MASK 0xFFF
+#define GEN4_FUSE_MASK 0xFFF
 
 #define TSC_MAX_NUM    5
 
@@ -272,6 +279,34 @@ static void rcar_gen3_thermal_read_fuses_gen3(struct rcar_gen3_thermal_priv *pri
        }
 }
 
+static void rcar_gen3_thermal_read_fuses_gen4(struct rcar_gen3_thermal_priv *priv)
+{
+       unsigned int i;
+
+       /*
+        * Set the pseudo calibration points with fused values.
+        * PTAT is shared between all TSCs but only fused for the first
+        * TSC while THCODEs are fused for each TSC.
+        */
+       priv->ptat[0] = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN4_THSFMON16) &
+               GEN4_FUSE_MASK;
+       priv->ptat[1] = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN4_THSFMON17) &
+               GEN4_FUSE_MASK;
+       priv->ptat[2] = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN4_THSFMON15) &
+               GEN4_FUSE_MASK;
+
+       for (i = 0; i < priv->num_tscs; i++) {
+               struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];
+
+               tsc->thcode[0] = rcar_gen3_thermal_read(tsc, REG_GEN4_THSFMON01) &
+                       GEN4_FUSE_MASK;
+               tsc->thcode[1] = rcar_gen3_thermal_read(tsc, REG_GEN4_THSFMON02) &
+                       GEN4_FUSE_MASK;
+               tsc->thcode[2] = rcar_gen3_thermal_read(tsc, REG_GEN4_THSFMON00) &
+                       GEN4_FUSE_MASK;
+       }
+}
+
 static bool rcar_gen3_thermal_read_fuses(struct rcar_gen3_thermal_priv *priv)
 {
        unsigned int i;
@@ -343,6 +378,11 @@ static const struct rcar_thermal_info rcar_gen3_thermal_info = {
        .read_fuses = rcar_gen3_thermal_read_fuses_gen3,
 };
 
+static const struct rcar_thermal_info rcar_gen4_thermal_info = {
+       .ths_tj_1 = 126,
+       .read_fuses = rcar_gen3_thermal_read_fuses_gen4,
+};
+
 static const struct of_device_id rcar_gen3_thermal_dt_ids[] = {
        {
                .compatible = "renesas,r8a774a1-thermal",
@@ -382,11 +422,11 @@ static const struct of_device_id rcar_gen3_thermal_dt_ids[] = {
        },
        {
                .compatible = "renesas,r8a779f0-thermal",
-               .data = &rcar_gen3_thermal_info,
+               .data = &rcar_gen4_thermal_info,
        },
        {
                .compatible = "renesas,r8a779g0-thermal",
-               .data = &rcar_gen3_thermal_info,
+               .data = &rcar_gen4_thermal_info,
        },
        {},
 };