thermal: exynos: Add driver support for exynos5440 TMU sensor

This patch modifies TMU controller to add changes needed to work with
exynos5440 platform. This sensor registers 3 instance of the tmu controller
with the thermal zone and hence reports 3 temperature output. This controller
supports upto five trip points. For critical threshold the driver uses the
core driver thermal framework for shutdown.

Acked-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Jungseok Lee <jays.lee@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>

diff --git a/drivers/thermal/samsung/exynos_thermal_common.h b/drivers/thermal/samsung/exynos_thermal_common.h
index bc3016e..3eb2ed9 100644 (file)
--- a/drivers/thermal/samsung/exynos_thermal_common.h
+++ b/drivers/thermal/samsung/exynos_thermal_common.h
@@ -27,7 +27,7 @@
 #define SENSOR_NAME_LEN        16
 #define MAX_TRIP_COUNT 8
 #define MAX_COOLING_DEVICE 4
-#define MAX_THRESHOLD_LEVS 4
+#define MAX_THRESHOLD_LEVS 5
 
 #define ACTIVE_INTERVAL 500
 #define IDLE_INTERVAL 10000

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 31bf373..6bc86f6 100644 (file)
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -156,7 +156,26 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
                __raw_writel(1, data->base + reg->triminfo_ctrl);
 
        /* Save trimming info in order to perform calibration */
-       trim_info = readl(data->base + reg->triminfo_data);
+       if (data->soc == SOC_ARCH_EXYNOS5440) {
+               /*
+                * For exynos5440 soc triminfo value is swapped between TMU0 and
+                * TMU2, so the below logic is needed.
+                */
+               switch (data->id) {
+               case 0:
+                       trim_info = readl(data->base +
+                       EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
+                       break;
+               case 1:
+                       trim_info = readl(data->base + reg->triminfo_data);
+                       break;
+               case 2:
+                       trim_info = readl(data->base -
+                       EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
+               }
+       } else {
+               trim_info = readl(data->base + reg->triminfo_data);
+       }
        data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
        data->temp_error2 = ((trim_info >> reg->triminfo_85_shift) &
                                EXYNOS_TMU_TEMP_MASK);
@@ -201,7 +220,7 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
                        reg->threshold_th0 + i * sizeof(reg->threshold_th0));
 
                writel(reg->inten_rise_mask, data->base + reg->tmu_intclear);
-       } else if (data->soc == SOC_ARCH_EXYNOS) {
+       } else {
                /* Write temperature code for rising and falling threshold */
                for (i = 0;
                i < trigger_levs && i < EXYNOS_MAX_TRIGGER_PER_REG; i++) {
@@ -241,14 +260,26 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
                                ret = threshold_code;
                                goto out;
                        }
-                       rising_threshold |= threshold_code << 8 * i;
-                       writel(rising_threshold,
-                               data->base + reg->threshold_th0);
+                       if (i == EXYNOS_MAX_TRIGGER_PER_REG - 1) {
+                               /* 1-4 level to be assigned in th0 reg */
+                               rising_threshold |= threshold_code << 8 * i;
+                               writel(rising_threshold,
+                                       data->base + reg->threshold_th0);
+                       } else if (i == EXYNOS_MAX_TRIGGER_PER_REG) {
+                               /* 5th level to be assigned in th2 reg */
+                               rising_threshold =
+                               threshold_code << reg->threshold_th3_l0_shift;
+                               writel(rising_threshold,
+                                       data->base + reg->threshold_th2);
+                       }
                        con = readl(data->base + reg->tmu_ctrl);
                        con |= (1 << reg->therm_trip_en_shift);
                        writel(con, data->base + reg->tmu_ctrl);
                }
        }
+       /*Clear the PMIN in the common TMU register*/
+       if (reg->tmu_pmin && !data->id)
+               writel(0, data->base_common + reg->tmu_pmin);
 out:
        clk_disable(data->clk);
        mutex_unlock(&data->lock);
@@ -377,7 +408,14 @@ static void exynos_tmu_work(struct work_struct *work)
                        struct exynos_tmu_data, irq_work);
        struct exynos_tmu_platform_data *pdata = data->pdata;
        const struct exynos_tmu_registers *reg = pdata->registers;
-       unsigned int val_irq;
+       unsigned int val_irq, val_type;
+
+       /* Find which sensor generated this interrupt */
+       if (reg->tmu_irqstatus) {
+               val_type = readl(data->base_common + reg->tmu_irqstatus);
+               if (!((val_type >> data->id) & 0x1))
+                       goto out;
+       }
 
        exynos_report_trigger(data->reg_conf);
        mutex_lock(&data->lock);
@@ -390,7 +428,7 @@ static void exynos_tmu_work(struct work_struct *work)
 
        clk_disable(data->clk);
        mutex_unlock(&data->lock);
-
+out:
        enable_irq(data->irq);
 }
 
@@ -538,7 +576,8 @@ static int exynos_tmu_probe(struct platform_device *pdev)
                return ret;
 
        if (pdata->type == SOC_ARCH_EXYNOS ||
-                               pdata->type == SOC_ARCH_EXYNOS4210)
+               pdata->type == SOC_ARCH_EXYNOS4210 ||
+                               pdata->type == SOC_ARCH_EXYNOS5440)
                data->soc = pdata->type;
        else {
                ret = -EINVAL;

diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
index ff8844f..25c48d4 100644 (file)
--- a/drivers/thermal/samsung/exynos_tmu.h
+++ b/drivers/thermal/samsung/exynos_tmu.h
@@ -40,6 +40,7 @@ enum calibration_mode {
 enum soc_type {
        SOC_ARCH_EXYNOS4210 = 1,
        SOC_ARCH_EXYNOS,
+       SOC_ARCH_EXYNOS5440,
 };
 
 /**
@@ -131,6 +132,8 @@ enum soc_type {
  * @emul_temp_shift: shift bits of emulation temperature.
  * @emul_time_shift: shift bits of emulation time.
  * @emul_time_mask: mask bits of emulation time.
+ * @tmu_irqstatus: register to find which TMU generated interrupts.
+ * @tmu_pmin: register to get/set the Pmin value.
  */
 struct exynos_tmu_registers {
        u32     triminfo_data;
@@ -198,6 +201,9 @@ struct exynos_tmu_registers {
        u32     emul_temp_shift;
        u32     emul_time_shift;
        u32     emul_time_mask;
+
+       u32     tmu_irqstatus;
+       u32     tmu_pmin;
 };
 
 /**

diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
index 139dbbb..ad263e9 100644 (file)
--- a/drivers/thermal/samsung/exynos_tmu_data.h
+++ b/drivers/thermal/samsung/exynos_tmu_data.h
@@ -93,6 +93,42 @@
 
 #define EXYNOS_MAX_TRIGGER_PER_REG     4
 
+/*exynos5440 specific registers*/
+#define EXYNOS5440_TMU_S0_7_TRIM               0x000
+#define EXYNOS5440_TMU_S0_7_CTRL               0x020
+#define EXYNOS5440_TMU_S0_7_DEBUG              0x040
+#define EXYNOS5440_TMU_S0_7_STATUS             0x060
+#define EXYNOS5440_TMU_S0_7_TEMP               0x0f0
+#define EXYNOS5440_TMU_S0_7_TH0                        0x110
+#define EXYNOS5440_TMU_S0_7_TH1                        0x130
+#define EXYNOS5440_TMU_S0_7_TH2                        0x150
+#define EXYNOS5440_TMU_S0_7_EVTEN              0x1F0
+#define EXYNOS5440_TMU_S0_7_IRQEN              0x210
+#define EXYNOS5440_TMU_S0_7_IRQ                        0x230
+/* exynos5440 common registers */
+#define EXYNOS5440_TMU_IRQ_STATUS              0x000
+#define EXYNOS5440_TMU_PMIN                    0x004
+#define EXYNOS5440_TMU_TEMP                    0x008
+
+#define EXYNOS5440_TMU_RISE_INT_MASK           0xf
+#define EXYNOS5440_TMU_RISE_INT_SHIFT          0
+#define EXYNOS5440_TMU_FALL_INT_MASK           0xf
+#define EXYNOS5440_TMU_FALL_INT_SHIFT          4
+#define EXYNOS5440_TMU_INTEN_RISE0_SHIFT       0
+#define EXYNOS5440_TMU_INTEN_RISE1_SHIFT       1
+#define EXYNOS5440_TMU_INTEN_RISE2_SHIFT       2
+#define EXYNOS5440_TMU_INTEN_RISE3_SHIFT       3
+#define EXYNOS5440_TMU_INTEN_FALL0_SHIFT       4
+#define EXYNOS5440_TMU_INTEN_FALL1_SHIFT       5
+#define EXYNOS5440_TMU_INTEN_FALL2_SHIFT       6
+#define EXYNOS5440_TMU_INTEN_FALL3_SHIFT       7
+#define EXYNOS5440_TMU_TH_RISE0_SHIFT          0
+#define EXYNOS5440_TMU_TH_RISE1_SHIFT          8
+#define EXYNOS5440_TMU_TH_RISE2_SHIFT          16
+#define EXYNOS5440_TMU_TH_RISE3_SHIFT          24
+#define EXYNOS5440_TMU_TH_RISE4_SHIFT          24
+#define EXYNOS5440_EFUSE_SWAP_OFFSET           8
+
 #if defined(CONFIG_CPU_EXYNOS4210)
 extern struct exynos_tmu_init_data const exynos4210_default_tmu_data;
 #define EXYNOS4210_TMU_DRV_DATA (&exynos4210_default_tmu_data)