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-rw-r--r--drivers/video/backlight/Kconfig13
-rw-r--r--drivers/video/backlight/Makefile2
-rw-r--r--drivers/video/backlight/adp8860_bl.c2
-rw-r--r--drivers/video/backlight/adp8870_bl.c2
-rw-r--r--drivers/video/backlight/as3711_bl.c45
-rw-r--r--drivers/video/backlight/generic_bl.c5
-rw-r--r--drivers/video/backlight/lp855x_bl.c2
-rw-r--r--drivers/video/backlight/max8925_bl.c4
-rw-r--r--drivers/video/backlight/otm3225a.c252
-rw-r--r--drivers/video/backlight/pandora_bl.c25
-rw-r--r--drivers/video/backlight/pwm_bl.c34
-rw-r--r--drivers/video/backlight/rave-sp-backlight.c82
-rw-r--r--drivers/video/backlight/tps65217_bl.c4
13 files changed, 431 insertions, 41 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 4e1d2ad50ba1..2919e2334052 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -150,6 +150,13 @@ config LCD_HX8357
If you have a HX-8357 LCD panel, say Y to enable its LCD control
driver.
+ config LCD_OTM3225A
+ tristate "ORISE Technology OTM3225A support"
+ depends on SPI
+ help
+ If you have a panel based on the OTM3225A controller
+ chip then say y to include a driver for it.
+
endif # LCD_CLASS_DEVICE
#
@@ -467,6 +474,12 @@ config BACKLIGHT_ARCXCNN
If you have an ARCxCnnnn family backlight say Y to enable
the backlight driver.
+config BACKLIGHT_RAVE_SP
+ tristate "RAVE SP Backlight driver"
+ depends on RAVE_SP_CORE
+ help
+ Support for backlight control on RAVE SP device.
+
endif # BACKLIGHT_CLASS_DEVICE
endif # BACKLIGHT_LCD_SUPPORT
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 5e28f01c8391..0dcc2c745c03 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_LCD_LD9040) += ld9040.o
obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o
obj-$(CONFIG_LCD_LMS501KF03) += lms501kf03.o
obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
+obj-$(CONFIG_LCD_OTM3225A) += otm3225a.o
obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
obj-$(CONFIG_LCD_S6E63M0) += s6e63m0.o
obj-$(CONFIG_LCD_TDO24M) += tdo24m.o
@@ -57,3 +58,4 @@ obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o
obj-$(CONFIG_BACKLIGHT_TPS65217) += tps65217_bl.o
obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o
obj-$(CONFIG_BACKLIGHT_ARCXCNN) += arcxcnn_bl.o
+obj-$(CONFIG_BACKLIGHT_RAVE_SP) += rave-sp-backlight.o
diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
index e7315bf14d60..16119bde9750 100644
--- a/drivers/video/backlight/adp8860_bl.c
+++ b/drivers/video/backlight/adp8860_bl.c
@@ -223,7 +223,7 @@ static int adp8860_led_probe(struct i2c_client *client)
struct led_info *cur_led;
int ret, i;
- led = devm_kzalloc(&client->dev, sizeof(*led) * pdata->num_leds,
+ led = devm_kcalloc(&client->dev, pdata->num_leds, sizeof(*led),
GFP_KERNEL);
if (led == NULL)
return -ENOMEM;
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
index 058d1def2d1f..4fec9aa92d9b 100644
--- a/drivers/video/backlight/adp8870_bl.c
+++ b/drivers/video/backlight/adp8870_bl.c
@@ -246,7 +246,7 @@ static int adp8870_led_probe(struct i2c_client *client)
struct led_info *cur_led;
int ret, i;
- led = devm_kzalloc(&client->dev, pdata->num_leds * sizeof(*led),
+ led = devm_kcalloc(&client->dev, pdata->num_leds, sizeof(*led),
GFP_KERNEL);
if (led == NULL)
return -ENOMEM;
diff --git a/drivers/video/backlight/as3711_bl.c b/drivers/video/backlight/as3711_bl.c
index 734a9158946b..ca544aa764b8 100644
--- a/drivers/video/backlight/as3711_bl.c
+++ b/drivers/video/backlight/as3711_bl.c
@@ -28,8 +28,6 @@ enum as3711_bl_type {
struct as3711_bl_data {
bool powered;
- const char *fb_name;
- struct device *fb_dev;
enum as3711_bl_type type;
int brightness;
struct backlight_device *bl;
@@ -262,10 +260,10 @@ static int as3711_bl_register(struct platform_device *pdev,
static int as3711_backlight_parse_dt(struct device *dev)
{
struct as3711_bl_pdata *pdata = dev_get_platdata(dev);
- struct device_node *bl =
- of_find_node_by_name(dev->parent->of_node, "backlight"), *fb;
+ struct device_node *bl, *fb;
int ret;
+ bl = of_get_child_by_name(dev->parent->of_node, "backlight");
if (!bl) {
dev_dbg(dev, "backlight node not found\n");
return -ENODEV;
@@ -273,26 +271,30 @@ static int as3711_backlight_parse_dt(struct device *dev)
fb = of_parse_phandle(bl, "su1-dev", 0);
if (fb) {
- pdata->su1_fb = fb->full_name;
+ of_node_put(fb);
+
+ pdata->su1_fb = true;
ret = of_property_read_u32(bl, "su1-max-uA", &pdata->su1_max_uA);
if (pdata->su1_max_uA <= 0)
ret = -EINVAL;
if (ret < 0)
- return ret;
+ goto err_put_bl;
}
fb = of_parse_phandle(bl, "su2-dev", 0);
if (fb) {
int count = 0;
- pdata->su2_fb = fb->full_name;
+ of_node_put(fb);
+
+ pdata->su2_fb = true;
ret = of_property_read_u32(bl, "su2-max-uA", &pdata->su2_max_uA);
if (pdata->su2_max_uA <= 0)
ret = -EINVAL;
if (ret < 0)
- return ret;
+ goto err_put_bl;
if (of_find_property(bl, "su2-feedback-voltage", NULL)) {
pdata->su2_feedback = AS3711_SU2_VOLTAGE;
@@ -314,8 +316,10 @@ static int as3711_backlight_parse_dt(struct device *dev)
pdata->su2_feedback = AS3711_SU2_CURR_AUTO;
count++;
}
- if (count != 1)
- return -EINVAL;
+ if (count != 1) {
+ ret = -EINVAL;
+ goto err_put_bl;
+ }
count = 0;
if (of_find_property(bl, "su2-fbprot-lx-sd4", NULL)) {
@@ -334,8 +338,10 @@ static int as3711_backlight_parse_dt(struct device *dev)
pdata->su2_fbprot = AS3711_SU2_GPIO4;
count++;
}
- if (count != 1)
- return -EINVAL;
+ if (count != 1) {
+ ret = -EINVAL;
+ goto err_put_bl;
+ }
count = 0;
if (of_find_property(bl, "su2-auto-curr1", NULL)) {
@@ -355,11 +361,20 @@ static int as3711_backlight_parse_dt(struct device *dev)
* At least one su2-auto-curr* must be specified iff
* AS3711_SU2_CURR_AUTO is used
*/
- if (!count ^ (pdata->su2_feedback != AS3711_SU2_CURR_AUTO))
- return -EINVAL;
+ if (!count ^ (pdata->su2_feedback != AS3711_SU2_CURR_AUTO)) {
+ ret = -EINVAL;
+ goto err_put_bl;
+ }
}
+ of_node_put(bl);
+
return 0;
+
+err_put_bl:
+ of_node_put(bl);
+
+ return ret;
}
static int as3711_backlight_probe(struct platform_device *pdev)
@@ -412,7 +427,6 @@ static int as3711_backlight_probe(struct platform_device *pdev)
if (pdata->su1_fb) {
su = &supply->su1;
- su->fb_name = pdata->su1_fb;
su->type = AS3711_BL_SU1;
max_brightness = min(pdata->su1_max_uA, 31);
@@ -423,7 +437,6 @@ static int as3711_backlight_probe(struct platform_device *pdev)
if (pdata->su2_fb) {
su = &supply->su2;
- su->fb_name = pdata->su2_fb;
su->type = AS3711_BL_SU2;
switch (pdata->su2_fbprot) {
diff --git a/drivers/video/backlight/generic_bl.c b/drivers/video/backlight/generic_bl.c
index 67dfb939a514..4dea91acea13 100644
--- a/drivers/video/backlight/generic_bl.c
+++ b/drivers/video/backlight/generic_bl.c
@@ -21,9 +21,6 @@ static int genericbl_intensity;
static struct backlight_device *generic_backlight_device;
static struct generic_bl_info *bl_machinfo;
-/* Flag to signal when the battery is low */
-#define GENERICBL_BATTLOW BL_CORE_DRIVER1
-
static int genericbl_send_intensity(struct backlight_device *bd)
{
int intensity = bd->props.brightness;
@@ -34,8 +31,6 @@ static int genericbl_send_intensity(struct backlight_device *bd)
intensity = 0;
if (bd->props.state & BL_CORE_SUSPENDED)
intensity = 0;
- if (bd->props.state & GENERICBL_BATTLOW)
- intensity &= bl_machinfo->limit_mask;
bl_machinfo->set_bl_intensity(intensity);
diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index 939f057836e1..73612485ed07 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -374,7 +374,7 @@ static int lp855x_parse_dt(struct lp855x *lp)
struct device_node *child;
int i = 0;
- rom = devm_kzalloc(dev, sizeof(*rom) * rom_length, GFP_KERNEL);
+ rom = devm_kcalloc(dev, rom_length, sizeof(*rom), GFP_KERNEL);
if (!rom)
return -ENOMEM;
diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c
index 7b738d60ecc2..f3aa6088f1d9 100644
--- a/drivers/video/backlight/max8925_bl.c
+++ b/drivers/video/backlight/max8925_bl.c
@@ -116,7 +116,7 @@ static void max8925_backlight_dt_init(struct platform_device *pdev)
if (!pdata)
return;
- np = of_find_node_by_name(nproot, "backlight");
+ np = of_get_child_by_name(nproot, "backlight");
if (!np) {
dev_err(&pdev->dev, "failed to find backlight node\n");
return;
@@ -125,6 +125,8 @@ static void max8925_backlight_dt_init(struct platform_device *pdev)
if (!of_property_read_u32(np, "maxim,max8925-dual-string", &val))
pdata->dual_string = val;
+ of_node_put(np);
+
pdev->dev.platform_data = pdata;
}
diff --git a/drivers/video/backlight/otm3225a.c b/drivers/video/backlight/otm3225a.c
new file mode 100644
index 000000000000..2472e2167aae
--- /dev/null
+++ b/drivers/video/backlight/otm3225a.c
@@ -0,0 +1,252 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for ORISE Technology OTM3225A SOC for TFT LCD
+ * Copyright (C) 2017, EETS GmbH, Felix Brack <fb@ltec.ch>
+ *
+ * This driver implements a lcd device for the ORISE OTM3225A display
+ * controller. The control interface to the display is SPI and the display's
+ * memory is updated over the 16-bit RGB interface.
+ * The main source of information for writing this driver was provided by the
+ * OTM3225A datasheet from ORISE Technology. Some information arise from the
+ * ILI9328 datasheet from ILITEK as well as from the datasheets and sample code
+ * provided by Crystalfontz America Inc. who sells the CFAF240320A-032T, a 3.2"
+ * TFT LC display using the OTM3225A controller.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/lcd.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+
+#define OTM3225A_INDEX_REG 0x70
+#define OTM3225A_DATA_REG 0x72
+
+/* instruction register list */
+#define DRIVER_OUTPUT_CTRL_1 0x01
+#define DRIVER_WAVEFORM_CTRL 0x02
+#define ENTRY_MODE 0x03
+#define SCALING_CTRL 0x04
+#define DISPLAY_CTRL_1 0x07
+#define DISPLAY_CTRL_2 0x08
+#define DISPLAY_CTRL_3 0x09
+#define FRAME_CYCLE_CTRL 0x0A
+#define EXT_DISP_IFACE_CTRL_1 0x0C
+#define FRAME_MAKER_POS 0x0D
+#define EXT_DISP_IFACE_CTRL_2 0x0F
+#define POWER_CTRL_1 0x10
+#define POWER_CTRL_2 0x11
+#define POWER_CTRL_3 0x12
+#define POWER_CTRL_4 0x13
+#define GRAM_ADDR_HORIZ_SET 0x20
+#define GRAM_ADDR_VERT_SET 0x21
+#define GRAM_READ_WRITE 0x22
+#define POWER_CTRL_7 0x29
+#define FRAME_RATE_CTRL 0x2B
+#define GAMMA_CTRL_1 0x30
+#define GAMMA_CTRL_2 0x31
+#define GAMMA_CTRL_3 0x32
+#define GAMMA_CTRL_4 0x35
+#define GAMMA_CTRL_5 0x36
+#define GAMMA_CTRL_6 0x37
+#define GAMMA_CTRL_7 0x38
+#define GAMMA_CTRL_8 0x39
+#define GAMMA_CTRL_9 0x3C
+#define GAMMA_CTRL_10 0x3D
+#define WINDOW_HORIZ_RAM_START 0x50
+#define WINDOW_HORIZ_RAM_END 0x51
+#define WINDOW_VERT_RAM_START 0x52
+#define WINDOW_VERT_RAM_END 0x53
+#define DRIVER_OUTPUT_CTRL_2 0x60
+#define BASE_IMG_DISPLAY_CTRL 0x61
+#define VERT_SCROLL_CTRL 0x6A
+#define PD1_DISPLAY_POS 0x80
+#define PD1_RAM_START 0x81
+#define PD1_RAM_END 0x82
+#define PD2_DISPLAY_POS 0x83
+#define PD2_RAM_START 0x84
+#define PD2_RAM_END 0x85
+#define PANEL_IFACE_CTRL_1 0x90
+#define PANEL_IFACE_CTRL_2 0x92
+#define PANEL_IFACE_CTRL_4 0x95
+#define PANEL_IFACE_CTRL_5 0x97
+
+struct otm3225a_data {
+ struct spi_device *spi;
+ struct lcd_device *ld;
+ int power;
+};
+
+struct otm3225a_spi_instruction {
+ unsigned char reg; /* register to write */
+ unsigned short value; /* data to write to 'reg' */
+ unsigned short delay; /* delay in ms after write */
+};
+
+static struct otm3225a_spi_instruction display_init[] = {
+ { DRIVER_OUTPUT_CTRL_1, 0x0000, 0 },
+ { DRIVER_WAVEFORM_CTRL, 0x0700, 0 },
+ { ENTRY_MODE, 0x50A0, 0 },
+ { SCALING_CTRL, 0x0000, 0 },
+ { DISPLAY_CTRL_2, 0x0606, 0 },
+ { DISPLAY_CTRL_3, 0x0000, 0 },
+ { FRAME_CYCLE_CTRL, 0x0000, 0 },
+ { EXT_DISP_IFACE_CTRL_1, 0x0000, 0 },
+ { FRAME_MAKER_POS, 0x0000, 0 },
+ { EXT_DISP_IFACE_CTRL_2, 0x0002, 0 },
+ { POWER_CTRL_2, 0x0007, 0 },
+ { POWER_CTRL_3, 0x0000, 0 },
+ { POWER_CTRL_4, 0x0000, 200 },
+ { DISPLAY_CTRL_1, 0x0101, 0 },
+ { POWER_CTRL_1, 0x12B0, 0 },
+ { POWER_CTRL_2, 0x0007, 0 },
+ { POWER_CTRL_3, 0x01BB, 50 },
+ { POWER_CTRL_4, 0x0013, 0 },
+ { POWER_CTRL_7, 0x0010, 50 },
+ { GAMMA_CTRL_1, 0x000A, 0 },
+ { GAMMA_CTRL_2, 0x1326, 0 },
+ { GAMMA_CTRL_3, 0x0A29, 0 },
+ { GAMMA_CTRL_4, 0x0A0A, 0 },
+ { GAMMA_CTRL_5, 0x1E03, 0 },
+ { GAMMA_CTRL_6, 0x031E, 0 },
+ { GAMMA_CTRL_7, 0x0706, 0 },
+ { GAMMA_CTRL_8, 0x0303, 0 },
+ { GAMMA_CTRL_9, 0x010E, 0 },
+ { GAMMA_CTRL_10, 0x040E, 0 },
+ { WINDOW_HORIZ_RAM_START, 0x0000, 0 },
+ { WINDOW_HORIZ_RAM_END, 0x00EF, 0 },
+ { WINDOW_VERT_RAM_START, 0x0000, 0 },
+ { WINDOW_VERT_RAM_END, 0x013F, 0 },
+ { DRIVER_OUTPUT_CTRL_2, 0x2700, 0 },
+ { BASE_IMG_DISPLAY_CTRL, 0x0001, 0 },
+ { VERT_SCROLL_CTRL, 0x0000, 0 },
+ { PD1_DISPLAY_POS, 0x0000, 0 },
+ { PD1_RAM_START, 0x0000, 0 },
+ { PD1_RAM_END, 0x0000, 0 },
+ { PD2_DISPLAY_POS, 0x0000, 0 },
+ { PD2_RAM_START, 0x0000, 0 },
+ { PD2_RAM_END, 0x0000, 0 },
+ { PANEL_IFACE_CTRL_1, 0x0010, 0 },
+ { PANEL_IFACE_CTRL_2, 0x0000, 0 },
+ { PANEL_IFACE_CTRL_4, 0x0210, 0 },
+ { PANEL_IFACE_CTRL_5, 0x0000, 0 },
+ { DISPLAY_CTRL_1, 0x0133, 0 },
+};
+
+static struct otm3225a_spi_instruction display_enable_rgb_interface[] = {
+ { ENTRY_MODE, 0x1080, 0 },
+ { GRAM_ADDR_HORIZ_SET, 0x0000, 0 },
+ { GRAM_ADDR_VERT_SET, 0x0000, 0 },
+ { EXT_DISP_IFACE_CTRL_1, 0x0111, 500 },
+};
+
+static struct otm3225a_spi_instruction display_off[] = {
+ { DISPLAY_CTRL_1, 0x0131, 100 },
+ { DISPLAY_CTRL_1, 0x0130, 100 },
+ { DISPLAY_CTRL_1, 0x0100, 0 },
+ { POWER_CTRL_1, 0x0280, 0 },
+ { POWER_CTRL_3, 0x018B, 0 },
+};
+
+static struct otm3225a_spi_instruction display_on[] = {
+ { POWER_CTRL_1, 0x1280, 0 },
+ { DISPLAY_CTRL_1, 0x0101, 100 },
+ { DISPLAY_CTRL_1, 0x0121, 0 },
+ { DISPLAY_CTRL_1, 0x0123, 100 },
+ { DISPLAY_CTRL_1, 0x0133, 10 },
+};
+
+static void otm3225a_write(struct spi_device *spi,
+ struct otm3225a_spi_instruction *instruction,
+ unsigned int count)
+{
+ unsigned char buf[3];
+
+ while (count--) {
+ /* address register using index register */
+ buf[0] = OTM3225A_INDEX_REG;
+ buf[1] = 0x00;
+ buf[2] = instruction->reg;
+ spi_write(spi, buf, 3);
+
+ /* write data to addressed register */
+ buf[0] = OTM3225A_DATA_REG;
+ buf[1] = (instruction->value >> 8) & 0xff;
+ buf[2] = instruction->value & 0xff;
+ spi_write(spi, buf, 3);
+
+ /* execute delay if any */
+ if (instruction->delay)
+ msleep(instruction->delay);
+ instruction++;
+ }
+}
+
+static int otm3225a_set_power(struct lcd_device *ld, int power)
+{
+ struct otm3225a_data *dd = lcd_get_data(ld);
+
+ if (power == dd->power)
+ return 0;
+
+ if (power > FB_BLANK_UNBLANK)
+ otm3225a_write(dd->spi, display_off, ARRAY_SIZE(display_off));
+ else
+ otm3225a_write(dd->spi, display_on, ARRAY_SIZE(display_on));
+ dd->power = power;
+
+ return 0;
+}
+
+static int otm3225a_get_power(struct lcd_device *ld)
+{
+ struct otm3225a_data *dd = lcd_get_data(ld);
+
+ return dd->power;
+}
+
+static struct lcd_ops otm3225a_ops = {
+ .set_power = otm3225a_set_power,
+ .get_power = otm3225a_get_power,
+};
+
+static int otm3225a_probe(struct spi_device *spi)
+{
+ struct otm3225a_data *dd;
+ struct lcd_device *ld;
+ struct device *dev = &spi->dev;
+
+ dd = devm_kzalloc(dev, sizeof(struct otm3225a_data), GFP_KERNEL);
+ if (dd == NULL)
+ return -ENOMEM;
+
+ ld = devm_lcd_device_register(dev, dev_name(dev), dev, dd,
+ &otm3225a_ops);
+ if (IS_ERR(ld))
+ return PTR_ERR(ld);
+
+ dd->spi = spi;
+ dd->ld = ld;
+ dev_set_drvdata(dev, dd);
+
+ dev_info(dev, "Initializing and switching to RGB interface");
+ otm3225a_write(spi, display_init, ARRAY_SIZE(display_init));
+ otm3225a_write(spi, display_enable_rgb_interface,
+ ARRAY_SIZE(display_enable_rgb_interface));
+ return 0;
+}
+
+static struct spi_driver otm3225a_driver = {
+ .driver = {
+ .name = "otm3225a",
+ .owner = THIS_MODULE,
+ },
+ .probe = otm3225a_probe,
+};
+
+module_spi_driver(otm3225a_driver);
+
+MODULE_AUTHOR("Felix Brack <fb@ltec.ch>");
+MODULE_DESCRIPTION("OTM3225A TFT LCD driver");
+MODULE_VERSION("1.0.0");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/video/backlight/pandora_bl.c b/drivers/video/backlight/pandora_bl.c
index a186bc677c7d..9618766e3866 100644
--- a/drivers/video/backlight/pandora_bl.c
+++ b/drivers/video/backlight/pandora_bl.c
@@ -35,11 +35,15 @@
#define MAX_VALUE 63
#define MAX_USER_VALUE (MAX_VALUE - MIN_VALUE)
-#define PANDORABL_WAS_OFF BL_CORE_DRIVER1
+struct pandora_private {
+ unsigned old_state;
+#define PANDORABL_WAS_OFF 1
+};
static int pandora_backlight_update_status(struct backlight_device *bl)
{
int brightness = bl->props.brightness;
+ struct pandora_private *priv = bl_get_data(bl);
u8 r;
if (bl->props.power != FB_BLANK_UNBLANK)
@@ -53,7 +57,7 @@ static int pandora_backlight_update_status(struct backlight_device *bl)
brightness = MAX_USER_VALUE;
if (brightness == 0) {
- if (bl->props.state & PANDORABL_WAS_OFF)
+ if (priv->old_state == PANDORABL_WAS_OFF)
goto done;
/* first disable PWM0 output, then clock */
@@ -66,7 +70,7 @@ static int pandora_backlight_update_status(struct backlight_device *bl)
goto done;
}
- if (bl->props.state & PANDORABL_WAS_OFF) {
+ if (priv->old_state == PANDORABL_WAS_OFF) {
/*
* set PWM duty cycle to max. TPS61161 seems to use this
* to calibrate it's PWM sensitivity when it starts.
@@ -93,9 +97,9 @@ static int pandora_backlight_update_status(struct backlight_device *bl)
done:
if (brightness != 0)
- bl->props.state &= ~PANDORABL_WAS_OFF;
+ priv->old_state = 0;
else
- bl->props.state |= PANDORABL_WAS_OFF;
+ priv->old_state = PANDORABL_WAS_OFF;
return 0;
}
@@ -109,13 +113,20 @@ static int pandora_backlight_probe(struct platform_device *pdev)
{
struct backlight_properties props;
struct backlight_device *bl;
+ struct pandora_private *priv;
u8 r;
+ priv = devm_kmalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "failed to allocate driver private data\n");
+ return -ENOMEM;
+ }
+
memset(&props, 0, sizeof(props));
props.max_brightness = MAX_USER_VALUE;
props.type = BACKLIGHT_RAW;
bl = devm_backlight_device_register(&pdev->dev, pdev->name, &pdev->dev,
- NULL, &pandora_backlight_ops, &props);
+ priv, &pandora_backlight_ops, &props);
if (IS_ERR(bl)) {
dev_err(&pdev->dev, "failed to register backlight\n");
return PTR_ERR(bl);
@@ -126,7 +137,7 @@ static int pandora_backlight_probe(struct platform_device *pdev)
/* 64 cycle period, ON position 0 */
twl_i2c_write_u8(TWL_MODULE_PWM, 0x80, TWL_PWM0_ON);
- bl->props.state |= PANDORABL_WAS_OFF;
+ priv->old_state = PANDORABL_WAS_OFF;
bl->props.brightness = MAX_USER_VALUE;
backlight_update_status(bl);
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 1c2289ddd555..44ac5bde4e9d 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -10,6 +10,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
#include <linux/module.h>
@@ -35,6 +36,8 @@ struct pwm_bl_data {
struct gpio_desc *enable_gpio;
unsigned int scale;
bool legacy;
+ unsigned int post_pwm_on_delay;
+ unsigned int pwm_off_delay;
int (*notify)(struct device *,
int brightness);
void (*notify_after)(struct device *,
@@ -54,10 +57,14 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness)
if (err < 0)
dev_err(pb->dev, "failed to enable power supply\n");
+ pwm_enable(pb->pwm);
+
+ if (pb->post_pwm_on_delay)
+ msleep(pb->post_pwm_on_delay);
+
if (pb->enable_gpio)
gpiod_set_value_cansleep(pb->enable_gpio, 1);
- pwm_enable(pb->pwm);
pb->enabled = true;
}
@@ -66,12 +73,15 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
if (!pb->enabled)
return;
- pwm_config(pb->pwm, 0, pb->period);
- pwm_disable(pb->pwm);
-
if (pb->enable_gpio)
gpiod_set_value_cansleep(pb->enable_gpio, 0);
+ if (pb->pwm_off_delay)
+ msleep(pb->pwm_off_delay);
+
+ pwm_config(pb->pwm, 0, pb->period);
+ pwm_disable(pb->pwm);
+
regulator_disable(pb->power_supply);
pb->enabled = false;
}
@@ -177,6 +187,14 @@ static int pwm_backlight_parse_dt(struct device *dev,
data->max_brightness--;
}
+ /*
+ * These values are optional and set as 0 by default, the out values
+ * are modified only if a valid u32 value can be decoded.
+ */
+ of_property_read_u32(node, "post-pwm-on-delay-ms",
+ &data->post_pwm_on_delay);
+ of_property_read_u32(node, "pwm-off-delay-ms", &data->pwm_off_delay);
+
data->enable_gpio = -EINVAL;
return 0;
}
@@ -275,6 +293,8 @@ static int pwm_backlight_probe(struct platform_device *pdev)
pb->exit = data->exit;
pb->dev = &pdev->dev;
pb->enabled = false;
+ pb->post_pwm_on_delay = data->post_pwm_on_delay;
+ pb->pwm_off_delay = data->pwm_off_delay;
pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
GPIOD_ASIS);
@@ -301,14 +321,14 @@ static int pwm_backlight_probe(struct platform_device *pdev)
/*
* If the GPIO is not known to be already configured as output, that
- * is, if gpiod_get_direction returns either GPIOF_DIR_IN or -EINVAL,
- * change the direction to output and set the GPIO as active.
+ * is, if gpiod_get_direction returns either 1 or -EINVAL, change the
+ * direction to output and set the GPIO as active.
* Do not force the GPIO to active when it was already output as it
* could cause backlight flickering or we would enable the backlight too
* early. Leave the decision of the initial backlight state for later.
*/
if (pb->enable_gpio &&
- gpiod_get_direction(pb->enable_gpio) != GPIOF_DIR_OUT)
+ gpiod_get_direction(pb->enable_gpio) != 0)
gpiod_direction_output(pb->enable_gpio, 1);
pb->power_supply = devm_regulator_get(&pdev->dev, "power");
diff --git a/drivers/video/backlight/rave-sp-backlight.c b/drivers/video/backlight/rave-sp-backlight.c
new file mode 100644
index 000000000000..462f14a1b19d
--- /dev/null
+++ b/drivers/video/backlight/rave-sp-backlight.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * LCD Backlight driver for RAVE SP
+ *
+ * Copyright (C) 2018 Zodiac Inflight Innovations
+ *
+ */
+
+#include <linux/backlight.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/rave-sp.h>
+#include <linux/platform_device.h>
+
+#define RAVE_SP_BACKLIGHT_LCD_EN BIT(7)
+
+static int rave_sp_backlight_update_status(struct backlight_device *bd)
+{
+ const struct backlight_properties *p = &bd->props;
+ const u8 intensity =
+ (p->power == FB_BLANK_UNBLANK) ? p->brightness : 0;
+ struct rave_sp *sp = dev_get_drvdata(&bd->dev);
+ u8 cmd[] = {
+ [0] = RAVE_SP_CMD_SET_BACKLIGHT,
+ [1] = 0,
+ [2] = intensity ? RAVE_SP_BACKLIGHT_LCD_EN | intensity : 0,
+ [3] = 0,
+ [4] = 0,
+ };
+
+ return rave_sp_exec(sp, cmd, sizeof(cmd), NULL, 0);
+}
+
+static const struct backlight_ops rave_sp_backlight_ops = {
+ .options = BL_CORE_SUSPENDRESUME,
+ .update_status = rave_sp_backlight_update_status,
+};
+
+static struct backlight_properties rave_sp_backlight_props = {
+ .type = BACKLIGHT_PLATFORM,
+ .max_brightness = 100,
+ .brightness = 50,
+};
+
+static int rave_sp_backlight_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct backlight_device *bd;
+
+ bd = devm_backlight_device_register(dev, pdev->name, dev->parent,
+ dev_get_drvdata(dev->parent),
+ &rave_sp_backlight_ops,
+ &rave_sp_backlight_props);
+ if (IS_ERR(bd))
+ return PTR_ERR(bd);
+
+ backlight_update_status(bd);
+
+ return 0;
+}
+
+static const struct of_device_id rave_sp_backlight_of_match[] = {
+ { .compatible = "zii,rave-sp-backlight" },
+ {}
+};
+
+static struct platform_driver rave_sp_backlight_driver = {
+ .probe = rave_sp_backlight_probe,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = rave_sp_backlight_of_match,
+ },
+};
+module_platform_driver(rave_sp_backlight_driver);
+
+MODULE_DEVICE_TABLE(of, rave_sp_backlight_of_match);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>");
+MODULE_AUTHOR("Nikita Yushchenko <nikita.yoush@cogentembedded.com>");
+MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
+MODULE_DESCRIPTION("RAVE SP Backlight driver");
diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c
index 380917c86276..762e3feed097 100644
--- a/drivers/video/backlight/tps65217_bl.c
+++ b/drivers/video/backlight/tps65217_bl.c
@@ -184,11 +184,11 @@ static struct tps65217_bl_pdata *
tps65217_bl_parse_dt(struct platform_device *pdev)
{
struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
- struct device_node *node = of_node_get(tps->dev->of_node);
+ struct device_node *node;
struct tps65217_bl_pdata *pdata, *err;
u32 val;
- node = of_find_node_by_name(node, "backlight");
+ node = of_get_child_by_name(tps->dev->of_node, "backlight");
if (!node)
return ERR_PTR(-ENODEV);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 01:59:41 +0100