+++ /dev/null
-From fe85ae40abf546bf592d171de942c17238103e52 Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.com>
-Date: Tue, 1 Sep 2020 18:15:27 +0100
-Subject: [PATCH] staging/fbtft: Add support for display variants
-
-Display variants are intended as a replacement for the now-deleted
-fbtft_device drivers. Drivers can register additional compatible
-strings with a custom callback that can make the required changes
-to the fbtft_display structure.
-
-Start the ball rolling by adding adafruit18, adafruit18_green and
-sainsmart18 displays.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.com>
----
- drivers/staging/fbtft/fb_st7735r.c | 38 +++++++++++++++++++++++++++++-
- drivers/staging/fbtft/fbtft-core.c | 15 +++++++++++-
- drivers/staging/fbtft/fbtft.h | 28 +++++++++++++++++-----
- 3 files changed, 73 insertions(+), 8 deletions(-)
-
---- a/drivers/staging/fbtft/fb_st7735r.c
-+++ b/drivers/staging/fbtft/fb_st7735r.c
-@@ -16,6 +16,10 @@
- #define DEFAULT_GAMMA "0F 1A 0F 18 2F 28 20 22 1F 1B 23 37 00 07 02 10\n" \
- "0F 1B 0F 17 33 2C 29 2E 30 30 39 3F 00 07 03 10"
-
-+#define ADAFRUIT18_GAMMA \
-+ "02 1c 07 12 37 32 29 2d 29 25 2B 39 00 01 03 10\n" \
-+ "03 1d 07 06 2E 2C 29 2D 2E 2E 37 3F 00 00 02 10"
-+
- static const s16 default_init_sequence[] = {
- -1, MIPI_DCS_SOFT_RESET,
- -2, 150, /* delay */
-@@ -94,6 +98,14 @@ static void set_addr_win(struct fbtft_pa
- write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
- }
-
-+static void adafruit18_green_tab_set_addr_win(struct fbtft_par *par,
-+ int xs, int ys, int xe, int ye)
-+{
-+ write_reg(par, 0x2A, 0, xs + 2, 0, xe + 2);
-+ write_reg(par, 0x2B, 0, ys + 1, 0, ye + 1);
-+ write_reg(par, 0x2C);
-+}
-+
- #define MY BIT(7)
- #define MX BIT(6)
- #define MV BIT(5)
-@@ -174,12 +186,36 @@ static struct fbtft_display display = {
- },
- };
-
--FBTFT_REGISTER_DRIVER(DRVNAME, "sitronix,st7735r", &display);
-+int variant_adafruit18(struct fbtft_display *display)
-+{
-+ display->gamma = ADAFRUIT18_GAMMA;
-+ return 0;
-+}
-+
-+int variant_adafruit18_green(struct fbtft_display *display)
-+{
-+ display->gamma = ADAFRUIT18_GAMMA;
-+ display->fbtftops.set_addr_win = adafruit18_green_tab_set_addr_win;
-+ return 0;
-+}
-+
-+FBTFT_REGISTER_DRIVER_START(&display)
-+FBTFT_COMPATIBLE("sitronix,st7735r")
-+FBTFT_COMPATIBLE("fbtft,sainsmart18")
-+FBTFT_VARIANT_COMPATIBLE("fbtft,adafruit18", variant_adafruit18)
-+FBTFT_VARIANT_COMPATIBLE("fbtft,adafruit18_green", variant_adafruit18_green)
-+FBTFT_REGISTER_DRIVER_END(DRVNAME, &display);
-
- MODULE_ALIAS("spi:" DRVNAME);
- MODULE_ALIAS("platform:" DRVNAME);
- MODULE_ALIAS("spi:st7735r");
- MODULE_ALIAS("platform:st7735r");
-+MODULE_ALIAS("spi:sainsmart18");
-+MODULE_ALIAS("platform:sainsmart");
-+MODULE_ALIAS("spi:adafruit18");
-+MODULE_ALIAS("platform:adafruit18");
-+MODULE_ALIAS("spi:adafruit18_green");
-+MODULE_ALIAS("platform:adafruit18_green");
-
- MODULE_DESCRIPTION("FB driver for the ST7735R LCD Controller");
- MODULE_AUTHOR("Noralf Tronnes");
---- a/drivers/staging/fbtft/fbtft-core.c
-+++ b/drivers/staging/fbtft/fbtft-core.c
-@@ -24,6 +24,7 @@
- #include <linux/platform_device.h>
- #include <linux/spinlock.h>
- #include <linux/of.h>
-+#include <linux/of_device.h>
- #include <video/mipi_display.h>
-
- #include "fbtft.h"
-@@ -1199,6 +1200,7 @@ static struct fbtft_platform_data *fbtft
- * @display: Display properties
- * @sdev: SPI device
- * @pdev: Platform device
-+ * @dt_ids: Compatible string table
- *
- * Allocates, initializes and registers a framebuffer
- *
-@@ -1208,12 +1210,15 @@ static struct fbtft_platform_data *fbtft
- */
- int fbtft_probe_common(struct fbtft_display *display,
- struct spi_device *sdev,
-- struct platform_device *pdev)
-+ struct platform_device *pdev,
-+ const struct of_device_id *dt_ids)
- {
- struct device *dev;
- struct fb_info *info;
- struct fbtft_par *par;
- struct fbtft_platform_data *pdata;
-+ const struct of_device_id *match;
-+ int (*variant)(struct fbtft_display *);
- int ret;
-
- if (sdev)
-@@ -1229,6 +1234,14 @@ int fbtft_probe_common(struct fbtft_disp
- pdata = fbtft_probe_dt(dev);
- if (IS_ERR(pdata))
- return PTR_ERR(pdata);
-+ match = of_match_device(dt_ids, dev);
-+ if (match && match->data) {
-+ /* apply the variant */
-+ variant = match->data;
-+ ret = (*variant)(display);
-+ if (ret)
-+ return ret;
-+ }
- }
-
- info = fbtft_framebuffer_alloc(display, dev, pdata);
---- a/drivers/staging/fbtft/fbtft.h
-+++ b/drivers/staging/fbtft/fbtft.h
-@@ -251,7 +251,8 @@ void fbtft_register_backlight(struct fbt
- void fbtft_unregister_backlight(struct fbtft_par *par);
- int fbtft_init_display(struct fbtft_par *par);
- int fbtft_probe_common(struct fbtft_display *display, struct spi_device *sdev,
-- struct platform_device *pdev);
-+ struct platform_device *pdev,
-+ const struct of_device_id *dt_ids);
- int fbtft_remove_common(struct device *dev, struct fb_info *info);
-
- /* fbtft-io.c */
-@@ -272,11 +273,13 @@ void fbtft_write_reg8_bus9(struct fbtft_
- void fbtft_write_reg16_bus8(struct fbtft_par *par, int len, ...);
- void fbtft_write_reg16_bus16(struct fbtft_par *par, int len, ...);
-
--#define FBTFT_REGISTER_DRIVER(_name, _compatible, _display) \
-+#define FBTFT_REGISTER_DRIVER_START(_display) \
-+ \
-+static const struct of_device_id dt_ids[]; \
- \
- static int fbtft_driver_probe_spi(struct spi_device *spi) \
- { \
-- return fbtft_probe_common(_display, spi, NULL); \
-+ return fbtft_probe_common(_display, spi, NULL, dt_ids); \
- } \
- \
- static int fbtft_driver_remove_spi(struct spi_device *spi) \
-@@ -288,7 +291,7 @@ static int fbtft_driver_remove_spi(struc
- \
- static int fbtft_driver_probe_pdev(struct platform_device *pdev) \
- { \
-- return fbtft_probe_common(_display, NULL, pdev); \
-+ return fbtft_probe_common(_display, NULL, pdev, dt_ids); \
- } \
- \
- static int fbtft_driver_remove_pdev(struct platform_device *pdev) \
-@@ -298,8 +301,16 @@ static int fbtft_driver_remove_pdev(stru
- return fbtft_remove_common(&pdev->dev, info); \
- } \
- \
--static const struct of_device_id dt_ids[] = { \
-- { .compatible = _compatible }, \
-+static const struct of_device_id dt_ids[] = {
-+
-+#define FBTFT_COMPATIBLE(_compatible) \
-+ { .compatible = _compatible },
-+
-+#define FBTFT_VARIANT_COMPATIBLE(_compatible, _variant) \
-+ { .compatible = _compatible, .data = _variant },
-+
-+#define FBTFT_REGISTER_DRIVER_END(_name, _display) \
-+ \
- {}, \
- }; \
- \
-@@ -344,6 +355,11 @@ static void __exit fbtft_driver_module_e
- module_init(fbtft_driver_module_init); \
- module_exit(fbtft_driver_module_exit);
-
-+#define FBTFT_REGISTER_DRIVER(_name, _compatible, _display) \
-+ FBTFT_REGISTER_DRIVER_START(_display) \
-+ FBTFT_COMPATIBLE(_compatible) \
-+ FBTFT_REGISTER_DRIVER_END(_name, _display)
-+
- /* Debug macros */
-
- /* shorthand debug levels */
projects / openwrt / openwrt.git / blobdiff