dbdb03ddb8
Now the names of the patch files correspond to the entry in the commit message. Patches that have been transferred (copied) since time immemorial and require revision have been removed. No one wants to deal with them.
155 lines
4.2 KiB
Diff
155 lines
4.2 KiB
Diff
From c8afe85b198d4dc383fe541cb2fb166b7d1132fb Mon Sep 17 00:00:00 2001
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From: Alan <Alan>
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Date: Sat, 20 May 2023 14:33:52 +0800
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Subject: Add: FB_TFT ST7796S driver
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---
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drivers/staging/fbtft/Kconfig | 10 +++
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drivers/staging/fbtft/Makefile | 1 +
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drivers/staging/fbtft/fb_st7796s.c | 100 +++++++++++++++++++++++++++++
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3 files changed, 111 insertions(+)
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create mode 100644 drivers/staging/fbtft/fb_st7796s.c
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diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
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index 5dda3c65a38e..8e491c9f6c0e 100644
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--- a/drivers/staging/fbtft/Kconfig
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+++ b/drivers/staging/fbtft/Kconfig
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@@ -172,6 +172,16 @@ config FB_TFT_ST7789V
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Say Y if you have such a display that utilizes this controller.
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+config FB_TFT_ST7796S
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+ tristate "FB driver for the ST7796S LCD Controller"
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+ depends on FB_TFT
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+ help
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+ This enables generic framebuffer support for the Sitronix ST7796S
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+ display controller. The controller is intended for small color
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+ displays with a resolution of up to 480x320 pixels.
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+
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+ Say Y if you have such a display that utilizes this controller.
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+
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config FB_TFT_TINYLCD
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tristate "FB driver for tinylcd.com display"
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depends on FB_TFT
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diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
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index e9cdf0f0a7da..7b2098b8a1bd 100644
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--- a/drivers/staging/fbtft/Makefile
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+++ b/drivers/staging/fbtft/Makefile
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@@ -31,6 +31,7 @@ obj-$(CONFIG_FB_TFT_SSD1331) += fb_ssd1331.o
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obj-$(CONFIG_FB_TFT_SSD1351) += fb_ssd1351.o
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obj-$(CONFIG_FB_TFT_ST7735R) += fb_st7735r.o
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obj-$(CONFIG_FB_TFT_ST7789V) += fb_st7789v.o
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+obj-$(CONFIG_FB_TFT_ST7796S) += fb_st7796s.o
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obj-$(CONFIG_FB_TFT_TINYLCD) += fb_tinylcd.o
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obj-$(CONFIG_FB_TFT_TLS8204) += fb_tls8204.o
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obj-$(CONFIG_FB_TFT_UC1611) += fb_uc1611.o
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diff --git a/drivers/staging/fbtft/fb_st7796s.c b/drivers/staging/fbtft/fb_st7796s.c
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new file mode 100644
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index 000000000000..cad489cef595
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--- /dev/null
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+++ b/drivers/staging/fbtft/fb_st7796s.c
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@@ -0,0 +1,100 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * FB driver for the ST7796S LCD Controller
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+ *
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+ * Copyright (c) 2023 Alan Ma
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+ * Copyright (c) 2014 Petr Olivka
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+ * Copyright (c) 2013 Noralf Tronnes
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/delay.h>
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+#include <video/mipi_display.h>
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+
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+#include "fbtft.h"
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+
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+#define DRVNAME "fb_st7796s"
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+#define WIDTH 480
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+#define HEIGHT 320
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+
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+static const s16 default_init_sequence[] = {
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+ -1, 0xC0, 0x0C, 0x02,
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+ -1, 0xC1, 0x44,
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+ -1, 0xC5, 0x00, 0x16, 0x80,
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+ -1, 0x36, 0x28,
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+ /* Interface Mode Control */
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+ -1, 0x3A, 0x55,
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+ -1, 0XB0, 0x00,
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+ /* Frame rate 70HZ */
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+ -1, 0xB1, 0xB0,
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+ -1, 0xB4, 0x02,
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+ /* RGB/MCU Interface Control */
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+ -1, 0xB6, 0x02, 0x02,
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+ -1, 0xE9, 0x00,
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+ -1, 0XF7, 0xA9, 0x51, 0x2C, 0x82,
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+ /* SLP_OUT - Sleep out */
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+ -1, MIPI_DCS_EXIT_SLEEP_MODE,
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+ -2, 50,
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+ /* DISP_ON */
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+ -1, MIPI_DCS_SET_DISPLAY_ON,
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+ -3
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+};
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+
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+static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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+{
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+ write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
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+ xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
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+
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+ write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
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+ ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
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+
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+ write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
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+}
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+
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+static int set_var(struct fbtft_par *par)
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+{
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+ switch (par->info->var.rotate) {
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+ case 270:
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+ write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
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+ 0x80 | (par->bgr << 3));
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+ break;
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+ case 180:
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+ write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
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+ 0xE0 | (par->bgr << 3));
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+ break;
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+ case 90:
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+ write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
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+ 0x40 | (par->bgr << 3));
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+ break;
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+ default:
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+ write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
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+ 0x20 | (par->bgr << 3));
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+ break;
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+ }
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+
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+ return 0;
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+}
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+
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+static struct fbtft_display display = {
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+ .regwidth = 8,
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+ .width = WIDTH,
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+ .height = HEIGHT,
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+ .init_sequence = default_init_sequence,
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+ .fbtftops = {
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+ .set_addr_win = set_addr_win,
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+ .set_var = set_var,
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+ },
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+};
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+
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+FBTFT_REGISTER_DRIVER(DRVNAME, "sitronix,st7796s", &display);
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+
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+MODULE_ALIAS("spi:" DRVNAME);
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+MODULE_ALIAS("platform:" DRVNAME);
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+MODULE_ALIAS("spi:st7796s");
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+MODULE_ALIAS("platform:st7796s");
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+
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+MODULE_DESCRIPTION("FB driver for the ST7796S LCD Controller");
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+MODULE_AUTHOR("Alan Ma");
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+MODULE_LICENSE("GPL");
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--
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2.35.3
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