Commit bf7696a1 authored by Hans de Goede's avatar Hans de Goede Committed by Thierry Reding

acpi: lpss: call pwm_add_table() for BSW PWM device

On x86 we do not have devicetree to link the PWM controller and
the display controller together. So someone needs to call
pwm_add_table() to create the link, so that the i915 driver's
pwm_get(dev, "pwm_backlight") call returns the lpss' pwm0.

The PWM subsystem does not want to have pwm_add_table() calls
directly in PWM drivers (this leads to probe ordering issues),
so lets do it here since the acpi-lpss code is always builtin.
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Acked-by: default avatarRafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 3aeeb375
...@@ -20,6 +20,7 @@ ...@@ -20,6 +20,7 @@
#include <linux/platform_data/clk-lpss.h> #include <linux/platform_data/clk-lpss.h>
#include <linux/pm_domain.h> #include <linux/pm_domain.h>
#include <linux/pm_runtime.h> #include <linux/pm_runtime.h>
#include <linux/pwm.h>
#include <linux/delay.h> #include <linux/delay.h>
#include "internal.h" #include "internal.h"
...@@ -154,6 +155,18 @@ static void byt_i2c_setup(struct lpss_private_data *pdata) ...@@ -154,6 +155,18 @@ static void byt_i2c_setup(struct lpss_private_data *pdata)
writel(0, pdata->mmio_base + LPSS_I2C_ENABLE); writel(0, pdata->mmio_base + LPSS_I2C_ENABLE);
} }
/* BSW PWM used for backlight control by the i915 driver */
static struct pwm_lookup bsw_pwm_lookup[] = {
PWM_LOOKUP_WITH_MODULE("80862288:00", 0, "0000:00:02.0",
"pwm_backlight", 0, PWM_POLARITY_NORMAL,
"pwm-lpss-platform"),
};
static void bsw_pwm_setup(struct lpss_private_data *pdata)
{
pwm_add_table(bsw_pwm_lookup, ARRAY_SIZE(bsw_pwm_lookup));
}
static const struct lpss_device_desc lpt_dev_desc = { static const struct lpss_device_desc lpt_dev_desc = {
.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR, .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR,
.prv_offset = 0x800, .prv_offset = 0x800,
...@@ -191,6 +204,7 @@ static const struct lpss_device_desc byt_pwm_dev_desc = { ...@@ -191,6 +204,7 @@ static const struct lpss_device_desc byt_pwm_dev_desc = {
static const struct lpss_device_desc bsw_pwm_dev_desc = { static const struct lpss_device_desc bsw_pwm_dev_desc = {
.flags = LPSS_SAVE_CTX | LPSS_NO_D3_DELAY, .flags = LPSS_SAVE_CTX | LPSS_NO_D3_DELAY,
.setup = bsw_pwm_setup,
}; };
static const struct lpss_device_desc byt_uart_dev_desc = { static const struct lpss_device_desc byt_uart_dev_desc = {
......
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