[PATCH v2 4/4] staging: fbtft: remove fb_ssd1351 driver

[Amit Barzilai <amit.barzilai22@gmail.com>]

The SSD1351 support was added to the ssd130x DRM driver. To avoid
confusion and irrelevant updates, the staging fb_ssd1351 driver is
removed.

Signed-off-by: Amit Barzilai <amit.barzilai22@gmail.com>
---
 drivers/staging/fbtft/Kconfig      |   5 -
 drivers/staging/fbtft/Makefile     |   1 -
 drivers/staging/fbtft/fb_ssd1351.c | 240 -----------------------------
 3 files changed, 246 deletions(-)
 delete mode 100644 drivers/staging/fbtft/fb_ssd1351.c

diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
index 92943564cb91..c8ea1a0f3fb0 100644
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -133,11 +133,6 @@ config FB_TFT_SSD1331
 	help
 	  Framebuffer support for SSD1331
 
-config FB_TFT_SSD1351
-	tristate "FB driver for the SSD1351 LCD Controller"
-	help
-	  Framebuffer support for SSD1351
-
 config FB_TFT_ST7735R
 	tristate "FB driver for the ST7735R LCD Controller"
 	help
diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index e9cdf0f0a7da..c230bf008fc7 100644
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -28,7 +28,6 @@ obj-$(CONFIG_FB_TFT_SSD1305)     += fb_ssd1305.o
 obj-$(CONFIG_FB_TFT_SSD1306)     += fb_ssd1306.o
 obj-$(CONFIG_FB_TFT_SSD1305)     += fb_ssd1325.o
 obj-$(CONFIG_FB_TFT_SSD1331)     += fb_ssd1331.o
-obj-$(CONFIG_FB_TFT_SSD1351)     += fb_ssd1351.o
 obj-$(CONFIG_FB_TFT_ST7735R)     += fb_st7735r.o
 obj-$(CONFIG_FB_TFT_ST7789V)     += fb_st7789v.o
 obj-$(CONFIG_FB_TFT_TINYLCD)     += fb_tinylcd.o
diff --git a/drivers/staging/fbtft/fb_ssd1351.c b/drivers/staging/fbtft/fb_ssd1351.c
deleted file mode 100644
index 6736b09b2f45..000000000000
--- a/drivers/staging/fbtft/fb_ssd1351.c
+++ /dev/null
@@ -1,240 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/backlight.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/spi/spi.h>
-#include <linux/delay.h>
-#include <linux/string_choices.h>
-
-#include "fbtft.h"
-
-#define DRVNAME		"fb_ssd1351"
-#define WIDTH		128
-#define HEIGHT		128
-#define GAMMA_NUM	1
-#define GAMMA_LEN	63
-#define DEFAULT_GAMMA	"0 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2 2 " \
-			"2 2 2 2 2 2 2" \
-
-static void register_onboard_backlight(struct fbtft_par *par);
-
-static int init_display(struct fbtft_par *par)
-{
-	if (par->pdata &&
-	    par->pdata->display.backlight == FBTFT_ONBOARD_BACKLIGHT) {
-		/* module uses onboard GPIO for panel power */
-		par->fbtftops.register_backlight = register_onboard_backlight;
-	}
-
-	par->fbtftops.reset(par);
-
-	write_reg(par, 0xfd, 0x12); /* Command Lock */
-	write_reg(par, 0xfd, 0xb1); /* Command Lock */
-	write_reg(par, 0xae); /* Display Off */
-	write_reg(par, 0xb3, 0xf1); /* Front Clock Div */
-	write_reg(par, 0xca, 0x7f); /* Set Mux Ratio */
-	write_reg(par, 0x15, 0x00, 0x7f); /* Set Column Address */
-	write_reg(par, 0x75, 0x00, 0x7f); /* Set Row Address */
-	write_reg(par, 0xa1, 0x00); /* Set Display Start Line */
-	write_reg(par, 0xa2, 0x00); /* Set Display Offset */
-	write_reg(par, 0xb5, 0x00); /* Set GPIO */
-	write_reg(par, 0xab, 0x01); /* Set Function Selection */
-	write_reg(par, 0xb1, 0x32); /* Set Phase Length */
-	write_reg(par, 0xb4, 0xa0, 0xb5, 0x55); /* Set Segment Low Voltage */
-	write_reg(par, 0xbb, 0x17); /* Set Precharge Voltage */
-	write_reg(par, 0xbe, 0x05); /* Set VComH Voltage */
-	write_reg(par, 0xc1, 0xc8, 0x80, 0xc8); /* Set Contrast */
-	write_reg(par, 0xc7, 0x0f); /* Set Master Contrast */
-	write_reg(par, 0xb6, 0x01); /* Set Second Precharge Period */
-	write_reg(par, 0xa6); /* Set Display Mode Reset */
-	write_reg(par, 0xaf); /* Set Sleep Mode Display On */
-
-	return 0;
-}
-
-static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
-{
-	write_reg(par, 0x15, xs, xe);
-	write_reg(par, 0x75, ys, ye);
-	write_reg(par, 0x5c);
-}
-
-static int set_var(struct fbtft_par *par)
-{
-	unsigned int remap;
-
-	if (par->fbtftops.init_display != init_display) {
-		/* don't risk messing up register A0h */
-		return 0;
-	}
-
-	remap = 0x60 | (par->bgr << 2); /* Set Colour Depth */
-
-	switch (par->info->var.rotate) {
-	case 0:
-		write_reg(par, 0xA0, remap | 0x00 | BIT(4));
-		break;
-	case 270:
-		write_reg(par, 0xA0, remap | 0x03 | BIT(4));
-		break;
-	case 180:
-		write_reg(par, 0xA0, remap | 0x02);
-		break;
-	case 90:
-		write_reg(par, 0xA0, remap | 0x01);
-		break;
-	}
-
-	return 0;
-}
-
-/*
- * Grayscale Lookup Table
- * GS1 - GS63
- * The driver Gamma curve contains the relative values between the entries
- * in the Lookup table.
- *
- * From datasheet:
- * 8.8 Gray Scale Decoder
- *
- *	there are total 180 Gamma Settings (Setting 0 to Setting 180)
- *	available for the Gray Scale table.
- *
- *	The gray scale is defined in incremental way, with reference
- *	to the length of previous table entry:
- *		Setting of GS1 has to be >= 0
- *		Setting of GS2 has to be > Setting of GS1 +1
- *		Setting of GS3 has to be > Setting of GS2 +1
- *		:
- *		Setting of GS63 has to be > Setting of GS62 +1
- *
- */
-static int set_gamma(struct fbtft_par *par, u32 *curves)
-{
-	unsigned long tmp[GAMMA_NUM * GAMMA_LEN];
-	int i, acc = 0;
-
-	for (i = 0; i < 63; i++) {
-		if (i > 0 && curves[i] < 2) {
-			dev_err(par->info->device,
-				"Illegal value in Grayscale Lookup Table at index %d : %d. Must be greater than 1\n",
-				i, curves[i]);
-			return -EINVAL;
-		}
-		acc += curves[i];
-		tmp[i] = acc;
-		if (acc > 180) {
-			dev_err(par->info->device,
-				"Illegal value(s) in Grayscale Lookup Table. At index=%d : %d, the accumulated value has exceeded 180\n",
-				i, acc);
-			return -EINVAL;
-		}
-	}
-
-	write_reg(par, 0xB8,
-		  tmp[0],  tmp[1],  tmp[2],  tmp[3],
-		  tmp[4],  tmp[5],  tmp[6],  tmp[7],
-		  tmp[8],  tmp[9],  tmp[10], tmp[11],
-		  tmp[12], tmp[13], tmp[14], tmp[15],
-		  tmp[16], tmp[17], tmp[18], tmp[19],
-		  tmp[20], tmp[21], tmp[22], tmp[23],
-		  tmp[24], tmp[25], tmp[26], tmp[27],
-		  tmp[28], tmp[29], tmp[30], tmp[31],
-		  tmp[32], tmp[33], tmp[34], tmp[35],
-		  tmp[36], tmp[37], tmp[38], tmp[39],
-		  tmp[40], tmp[41], tmp[42], tmp[43],
-		  tmp[44], tmp[45], tmp[46], tmp[47],
-		  tmp[48], tmp[49], tmp[50], tmp[51],
-		  tmp[52], tmp[53], tmp[54], tmp[55],
-		  tmp[56], tmp[57], tmp[58], tmp[59],
-		  tmp[60], tmp[61], tmp[62]);
-
-	return 0;
-}
-
-static int blank(struct fbtft_par *par, bool on)
-{
-	fbtft_par_dbg(DEBUG_BLANK, par, "(%s=%s)\n",
-		      __func__, str_true_false(on));
-	if (on)
-		write_reg(par, 0xAE);
-	else
-		write_reg(par, 0xAF);
-	return 0;
-}
-
-static struct fbtft_display display = {
-	.regwidth = 8,
-	.width = WIDTH,
-	.height = HEIGHT,
-	.gamma_num = GAMMA_NUM,
-	.gamma_len = GAMMA_LEN,
-	.gamma = DEFAULT_GAMMA,
-	.fbtftops = {
-		.init_display = init_display,
-		.set_addr_win = set_addr_win,
-		.set_var = set_var,
-		.set_gamma = set_gamma,
-		.blank = blank,
-	},
-};
-
-static int update_onboard_backlight(struct backlight_device *bd)
-{
-	struct fbtft_par *par = bl_get_data(bd);
-	bool on;
-
-	fbtft_par_dbg(DEBUG_BACKLIGHT, par, "%s: power=%d\n", __func__, bd->props.power);
-
-	on = !backlight_is_blank(bd);
-	/* Onboard backlight connected to GPIO0 on SSD1351, GPIO1 unused */
-	write_reg(par, 0xB5, on ? 0x03 : 0x02);
-
-	return 0;
-}
-
-static const struct backlight_ops bl_ops = {
-	.update_status = update_onboard_backlight,
-};
-
-static void register_onboard_backlight(struct fbtft_par *par)
-{
-	struct backlight_device *bd;
-	struct backlight_properties bl_props = { 0, };
-
-	bl_props.type = BACKLIGHT_RAW;
-	bl_props.power = BACKLIGHT_POWER_OFF;
-
-	bd = backlight_device_register(dev_driver_string(par->info->device),
-				       par->info->device, par, &bl_ops,
-				       &bl_props);
-	if (IS_ERR(bd)) {
-		dev_err(par->info->device,
-			"cannot register backlight device (%ld)\n",
-			PTR_ERR(bd));
-		return;
-	}
-	par->info->bl_dev = bd;
-
-	if (!par->fbtftops.unregister_backlight)
-		par->fbtftops.unregister_backlight = fbtft_unregister_backlight;
-}
-
-FBTFT_REGISTER_DRIVER(DRVNAME, "solomon,ssd1351", &display);
-
-MODULE_ALIAS("spi:" DRVNAME);
-MODULE_ALIAS("platform:" DRVNAME);
-MODULE_ALIAS("spi:ssd1351");
-MODULE_ALIAS("platform:ssd1351");
-
-MODULE_DESCRIPTION("SSD1351 OLED Driver");
-MODULE_AUTHOR("James Davies");
-MODULE_LICENSE("GPL");
-- 
2.54.0