Merge branches 'pm-cpufreq', 'pm-cpuidle' and 'pm-devfreq'

[karo-tx-linux.git] / drivers / acpi / acpi_lpss.c

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 5edfd9c4904458ae6b30eb844be451aa81f38bca..10347e3d73ad00d1cdf25ba462c1659f9638840e 100644 (file)
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -143,6 +143,22 @@ static void lpss_deassert_reset(struct lpss_private_data *pdata)
        writel(val, pdata->mmio_base + offset);
 }
 
+/*
+ * BYT PWM used for backlight control by the i915 driver on systems without
+ * the Crystal Cove PMIC.
+ */
+static struct pwm_lookup byt_pwm_lookup[] = {
+       PWM_LOOKUP_WITH_MODULE("80860F09:00", 0, "0000:00:02.0",
+                              "pwm_backlight", 0, PWM_POLARITY_NORMAL,
+                              "pwm-lpss-platform"),
+};
+
+static void byt_pwm_setup(struct lpss_private_data *pdata)
+{
+       if (!acpi_dev_present("INT33FD", NULL, -1))
+               pwm_add_table(byt_pwm_lookup, ARRAY_SIZE(byt_pwm_lookup));
+}
+
 #define LPSS_I2C_ENABLE                        0x6c
 
 static void byt_i2c_setup(struct lpss_private_data *pdata)
@@ -200,6 +216,7 @@ static const struct lpss_device_desc lpt_sdio_dev_desc = {
 
 static const struct lpss_device_desc byt_pwm_dev_desc = {
        .flags = LPSS_SAVE_CTX,
+       .setup = byt_pwm_setup,
 };
 
 static const struct lpss_device_desc bsw_pwm_dev_desc = {