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Release 4.11 drivers/video/backlight/lms283gf05.c

/*
 * lms283gf05.c -- support for Samsung LMS283GF05 LCD
 *
 * Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/lcd.h>

#include <linux/spi/spi.h>
#include <linux/spi/lms283gf05.h>
#include <linux/module.h>


struct lms283gf05_state {
	
struct spi_device	*spi;
	
struct lcd_device	*ld;
};


struct lms283gf05_seq {
	
unsigned char		reg;
	
unsigned short		value;
	
unsigned char		delay;
};

/* Magic sequences supplied by manufacturer, for details refer to datasheet */

static const struct lms283gf05_seq disp_initseq[] = {
	/* REG, VALUE, DELAY */
	{ 0x07, 0x0000, 0 },
	{ 0x13, 0x0000, 10 },

	{ 0x11, 0x3004, 0 },
	{ 0x14, 0x200F, 0 },
	{ 0x10, 0x1a20, 0 },
	{ 0x13, 0x0040, 50 },

	{ 0x13, 0x0060, 0 },
	{ 0x13, 0x0070, 200 },

	{ 0x01, 0x0127, 0 },
	{ 0x02,	0x0700, 0 },
	{ 0x03, 0x1030, 0 },
	{ 0x08, 0x0208, 0 },
	{ 0x0B, 0x0620, 0 },
	{ 0x0C, 0x0110, 0 },
	{ 0x30, 0x0120, 0 },
	{ 0x31, 0x0127, 0 },
	{ 0x32, 0x0000, 0 },
	{ 0x33, 0x0503, 0 },
	{ 0x34, 0x0727, 0 },
	{ 0x35, 0x0124, 0 },
	{ 0x36, 0x0706, 0 },
	{ 0x37, 0x0701, 0 },
	{ 0x38, 0x0F00, 0 },
	{ 0x39, 0x0F00, 0 },
	{ 0x40, 0x0000, 0 },
	{ 0x41, 0x0000, 0 },
	{ 0x42, 0x013f, 0 },
	{ 0x43, 0x0000, 0 },
	{ 0x44, 0x013f, 0 },
	{ 0x45, 0x0000, 0 },
	{ 0x46, 0xef00, 0 },
	{ 0x47, 0x013f, 0 },
	{ 0x48, 0x0000, 0 },
	{ 0x07, 0x0015, 30 },

	{ 0x07, 0x0017, 0 },

	{ 0x20, 0x0000, 0 },
	{ 0x21, 0x0000, 0 },
	{ 0x22, 0x0000, 0 }
};


static const struct lms283gf05_seq disp_pdwnseq[] = {
	{ 0x07, 0x0016, 30 },

	{ 0x07, 0x0004, 0 },
	{ 0x10, 0x0220, 20 },

	{ 0x13, 0x0060, 50 },

	{ 0x13, 0x0040, 50 },

	{ 0x13, 0x0000, 0 },
	{ 0x10, 0x0000, 0 }
};



static void lms283gf05_reset(unsigned long gpio, bool inverted) { gpio_set_value(gpio, !inverted); mdelay(100); gpio_set_value(gpio, inverted); mdelay(20); gpio_set_value(gpio, !inverted); mdelay(20); }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut51100.00%1100.00%
Total51100.00%1100.00%


static void lms283gf05_toggle(struct spi_device *spi, const struct lms283gf05_seq *seq, int sz) { char buf[3]; int i; for (i = 0; i < sz; i++) { buf[0] = 0x74; buf[1] = 0x00; buf[2] = seq[i].reg; spi_write(spi, buf, 3); buf[0] = 0x76; buf[1] = seq[i].value >> 8; buf[2] = seq[i].value & 0xff; spi_write(spi, buf, 3); mdelay(seq[i].delay); } }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut13299.25%150.00%
Jingoo Han10.75%150.00%
Total133100.00%2100.00%


static int lms283gf05_power_set(struct lcd_device *ld, int power) { struct lms283gf05_state *st = lcd_get_data(ld); struct spi_device *spi = st->spi; struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev); if (power <= FB_BLANK_NORMAL) { if (pdata) lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted); lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); } else { lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq)); if (pdata) gpio_set_value(pdata->reset_gpio, pdata->reset_inverted); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut11096.49%266.67%
Jingoo Han43.51%133.33%
Total114100.00%3100.00%

static struct lcd_ops lms_ops = { .set_power = lms283gf05_power_set, .get_power = NULL, };
static int lms283gf05_probe(struct spi_device *spi) { struct lms283gf05_state *st; struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev); struct lcd_device *ld; int ret = 0; if (pdata != NULL) { ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio, GPIOF_DIR_OUT | (!pdata->reset_inverted ? GPIOF_INIT_HIGH : GPIOF_INIT_LOW), "LMS285GF05 RESET"); if (ret) return ret; } st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state), GFP_KERNEL); if (st == NULL) return -ENOMEM; ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st, &lms_ops); if (IS_ERR(ld)) return PTR_ERR(ld); st->spi = spi; st->ld = ld; spi_set_drvdata(spi, st); /* kick in the LCD */ if (pdata) lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted); lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut15679.59%112.50%
Jingoo Han4020.41%787.50%
Total196100.00%8100.00%

static struct spi_driver lms283gf05_driver = { .driver = { .name = "lms283gf05", }, .probe = lms283gf05_probe, }; module_spi_driver(lms283gf05_driver); MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); MODULE_DESCRIPTION("LCD283GF05 LCD"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut93894.46%215.38%
Jingoo Han474.73%861.54%
Paul Gortmaker30.30%17.69%
Tejun Heo30.30%17.69%
Axel Lin20.20%17.69%
Total993100.00%13100.00%
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