diff options
Diffstat (limited to 'drivers/thermal/exynos_thermal.c')
| -rw-r--r-- | drivers/thermal/exynos_thermal.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/thermal/exynos_thermal.c b/drivers/thermal/exynos_thermal.c index 7772d1603769..e2ef8a3531ac 100644 --- a/drivers/thermal/exynos_thermal.c +++ b/drivers/thermal/exynos_thermal.c @@ -99,6 +99,14 @@ #define IDLE_INTERVAL 10000 #define MCELSIUS 1000 +#ifdef CONFIG_EXYNOS_THERMAL_EMUL +#define EXYNOS_EMUL_TIME 0x57F0 +#define EXYNOS_EMUL_TIME_SHIFT 16 +#define EXYNOS_EMUL_DATA_SHIFT 8 +#define EXYNOS_EMUL_DATA_MASK 0xFF +#define EXYNOS_EMUL_ENABLE 0x1 +#endif /* CONFIG_EXYNOS_THERMAL_EMUL */ + /* CPU Zone information */ #define PANIC_ZONE 4 #define WARN_ZONE 3 @@ -832,6 +840,94 @@ static inline struct exynos_tmu_platform_data *exynos_get_driver_data( return (struct exynos_tmu_platform_data *) platform_get_device_id(pdev)->driver_data; } + +#ifdef CONFIG_EXYNOS_THERMAL_EMUL +static ssize_t exynos_tmu_emulation_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct platform_device *pdev = container_of(dev, + struct platform_device, dev); + struct exynos_tmu_data *data = platform_get_drvdata(pdev); + unsigned int reg; + u8 temp_code; + int temp = 0; + + if (data->soc == SOC_ARCH_EXYNOS4210) + goto out; + + mutex_lock(&data->lock); + clk_enable(data->clk); + reg = readl(data->base + EXYNOS_EMUL_CON); + clk_disable(data->clk); + mutex_unlock(&data->lock); + + if (reg & EXYNOS_EMUL_ENABLE) { + reg >>= EXYNOS_EMUL_DATA_SHIFT; + temp_code = reg & EXYNOS_EMUL_DATA_MASK; + temp = code_to_temp(data, temp_code); + } +out: + return sprintf(buf, "%d\n", temp * MCELSIUS); +} + +static ssize_t exynos_tmu_emulation_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct platform_device *pdev = container_of(dev, + struct platform_device, dev); + struct exynos_tmu_data *data = platform_get_drvdata(pdev); + unsigned int reg; + int temp; + + if (data->soc == SOC_ARCH_EXYNOS4210) + goto out; + + if (!sscanf(buf, "%d\n", &temp) || temp < 0) + return -EINVAL; + + mutex_lock(&data->lock); + clk_enable(data->clk); + + reg = readl(data->base + EXYNOS_EMUL_CON); + + if (temp) { + /* Both CELSIUS and MCELSIUS type are available for input */ + if (temp > MCELSIUS) + temp /= MCELSIUS; + + reg = (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT) | + (temp_to_code(data, (temp / MCELSIUS)) + << EXYNOS_EMUL_DATA_SHIFT) | EXYNOS_EMUL_ENABLE; + } else { + reg &= ~EXYNOS_EMUL_ENABLE; + } + + writel(reg, data->base + EXYNOS_EMUL_CON); + + clk_disable(data->clk); + mutex_unlock(&data->lock); + +out: + return count; +} + +static DEVICE_ATTR(emulation, 0644, exynos_tmu_emulation_show, + exynos_tmu_emulation_store); +static int create_emulation_sysfs(struct device *dev) +{ + return device_create_file(dev, &dev_attr_emulation); +} +static void remove_emulation_sysfs(struct device *dev) +{ + device_remove_file(dev, &dev_attr_emulation); +} +#else +static inline int create_emulation_sysfs(struct device *dev) { return 0; } +static inline void remove_emulation_sysfs(struct device *dev) {} +#endif + static int __devinit exynos_tmu_probe(struct platform_device *pdev) { struct exynos_tmu_data *data; @@ -930,6 +1026,11 @@ static int __devinit exynos_tmu_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Failed to register thermal interface\n"); goto err_clk; } + + ret = create_emulation_sysfs(&pdev->dev); + if (ret) + dev_err(&pdev->dev, "Failed to create emulation mode sysfs node\n"); + return 0; err_clk: platform_set_drvdata(pdev, NULL); @@ -941,6 +1042,8 @@ static int __devexit exynos_tmu_remove(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); + remove_emulation_sysfs(&pdev->dev); + exynos_tmu_control(pdev, false); exynos_unregister_thermal(); |
