1 // SPDX-License-Identifier: GPL-2.0-or-later
16 #include <linux/soc/ti/omap1-io.h>
17 #include <linux/soc/ti/omap1-mux.h>
29 static inline void omapbl_send_intensity(int intensity)  in omapbl_send_intensity()
34 static inline void omapbl_send_enable(int enable)  in omapbl_send_enable()  argument
36 	omap_writeb(enable, OMAP_PWL_CLK_ENABLE);  in omapbl_send_enable()
39 static void omapbl_enable(struct omap_backlight *bl, bool enable)  in omapbl_enable()  argument
41 	if (enable) {  in omapbl_enable()
42 		omapbl_send_intensity(bl->current_intensity);  in omapbl_enable()
51 static int omapbl_suspend(struct device *dev)  in omapbl_suspend()
60 static int omapbl_resume(struct device *dev)  in omapbl_resume()
65 	omapbl_enable(bl, bl->enabled);  in omapbl_resume()
70 static void omapbl_set_enabled(struct backlight_device *dev, bool enable)  in omapbl_set_enabled()  argument
74 	omapbl_enable(bl, enable);  in omapbl_set_enabled()
75 	bl->enabled = enable;  in omapbl_set_enabled()
78 static int omapbl_update_status(struct backlight_device *dev)  in omapbl_update_status()
81 	bool enable;  in omapbl_update_status()  local
83 	if (bl->current_intensity != dev->props.brightness) {  in omapbl_update_status()
84 		if (bl->enabled)  in omapbl_update_status()
85 			omapbl_send_intensity(dev->props.brightness);  in omapbl_update_status()
86 		bl->current_intensity = dev->props.brightness;  in omapbl_update_status()
89 	enable = !backlight_is_blank(dev);  in omapbl_update_status()
91 	if (enable != bl->enabled)  in omapbl_update_status()
92 		omapbl_set_enabled(dev, enable);  in omapbl_update_status()
97 static int omapbl_get_intensity(struct backlight_device *dev)  in omapbl_get_intensity()
101 	return bl->current_intensity;  in omapbl_get_intensity()
104 static const struct backlight_ops omapbl_ops = {
109 static int omapbl_probe(struct platform_device *pdev)  in omapbl_probe()
114 	struct omap_backlight_config *pdata = dev_get_platdata(&pdev->dev);  in omapbl_probe()
117 		return -ENXIO;  in omapbl_probe()
119 	bl = devm_kzalloc(&pdev->dev, sizeof(struct omap_backlight),  in omapbl_probe()
122 		return -ENOMEM;  in omapbl_probe()
127 	dev = devm_backlight_device_register(&pdev->dev, "omap-bl", &pdev->dev,  in omapbl_probe()
132 	bl->enabled = false;  in omapbl_probe()
133 	bl->current_intensity = 0;  in omapbl_probe()
135 	bl->pdata = pdata;  in omapbl_probe()
136 	bl->dev = &pdev->dev;  in omapbl_probe()
142 	dev->props.brightness = pdata->default_intensity;  in omapbl_probe()
145 	dev_info(&pdev->dev, "OMAP LCD backlight initialised\n");  in omapbl_probe()
150 static SIMPLE_DEV_PM_OPS(omapbl_pm_ops, omapbl_suspend, omapbl_resume);
152 static struct platform_driver omapbl_driver = {
155 		.name	= "omap-bl",