// SPDX-License-Identifier: GPL-2.0 /* * Panel driver for the TPO TPG110 400CH LTPS TFT LCD Single Chip * Digital Driver. * * This chip drives a TFT LCD, so it does not know what kind of * display is actually connected to it, so the width and height of that * display needs to be supplied from the machine configuration. * * Author: * Linus Walleij <[email protected]> */ #include <drm/drm_modes.h> #include <drm/drm_panel.h> #include <linux/bitops.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/spi/spi.h> #define TPG110_TEST … #define TPG110_CHIPID … #define TPG110_CTRL1 … #define TPG110_RES_MASK … #define TPG110_RES_800X480 … #define TPG110_RES_640X480 … #define TPG110_RES_480X272 … #define TPG110_RES_480X640 … #define TPG110_RES_480X272_D … #define TPG110_RES_400X240_D … #define TPG110_CTRL2 … #define TPG110_CTRL2_PM … #define TPG110_CTRL2_RES_PM_CTRL … /** * struct tpg110_panel_mode - lookup struct for the supported modes */ struct tpg110_panel_mode { … }; /** * struct tpg110 - state container for the TPG110 panel */ struct tpg110 { … }; /* * TPG110 modes, these are the simple modes, the dualscan modes that * take 400x240 or 480x272 in and display as 800x480 are not listed. */ static const struct tpg110_panel_mode tpg110_modes[] = …; static inline struct tpg110 * to_tpg110(struct drm_panel *panel) { … } static u8 tpg110_readwrite_reg(struct tpg110 *tpg, bool write, u8 address, u8 outval) { … } static u8 tpg110_read_reg(struct tpg110 *tpg, u8 address) { … } static void tpg110_write_reg(struct tpg110 *tpg, u8 address, u8 outval) { … } static int tpg110_startup(struct tpg110 *tpg) { … } static int tpg110_disable(struct drm_panel *panel) { … } static int tpg110_enable(struct drm_panel *panel) { … } /** * tpg110_get_modes() - return the appropriate mode * @panel: the panel to get the mode for * @connector: reference to the central DRM connector control structure * * This currently does not present a forest of modes, instead it * presents the mode that is configured for the system under use, * and which is detected by reading the registers of the display. */ static int tpg110_get_modes(struct drm_panel *panel, struct drm_connector *connector) { … } static const struct drm_panel_funcs tpg110_drm_funcs = …; static int tpg110_probe(struct spi_device *spi) { … } static void tpg110_remove(struct spi_device *spi) { … } static const struct of_device_id tpg110_match[] = …; MODULE_DEVICE_TABLE(of, tpg110_match); static const struct spi_device_id tpg110_ids[] = …; MODULE_DEVICE_TABLE(spi, tpg110_ids); static struct spi_driver tpg110_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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