Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Power control for Samsung LTV350QV Quarter VGA LCD Panel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2006, 2007 Atmel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/lcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "ltv350qv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) struct ltv350qv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	struct spi_device	*spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	u8			*buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	int			power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct lcd_device	*ld;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * The power-on and power-off sequences are taken from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * LTV350QV-F04 data sheet from Samsung. The register definitions are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * taken from the S6F2002 command list also from Samsung. Both
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * documents are distributed with the AVR32 Linux BSP CD from Atmel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  * There's still some voodoo going on here, but it's a lot better than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * in the first incarnation of the driver where all we had was the raw
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * numbers from the initialization sequence.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static int ltv350qv_write_reg(struct ltv350qv *lcd, u8 reg, u16 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct spi_message msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct spi_transfer index_xfer = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		.len		= 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		.cs_change	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct spi_transfer value_xfer = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		.len		= 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	spi_message_init(&msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/* register index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	lcd->buffer[0] = LTV_OPC_INDEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	lcd->buffer[1] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	lcd->buffer[2] = reg & 0x7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	index_xfer.tx_buf = lcd->buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	spi_message_add_tail(&index_xfer, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	/* register value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	lcd->buffer[4] = LTV_OPC_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	lcd->buffer[5] = val >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	lcd->buffer[6] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	value_xfer.tx_buf = lcd->buffer + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	spi_message_add_tail(&value_xfer, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	return spi_sync(lcd->spi, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) /* The comments are taken straight from the data sheet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) static int ltv350qv_power_on(struct ltv350qv *lcd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	/* Power On Reset Display off State */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	usleep_range(15000, 16000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	/* Power Setting Function 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL2, LTV_VCOML_ENABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		goto err_power1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	/* Power Setting Function 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			       LTV_VCOM_DISABLE | LTV_DRIVE_CURRENT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			       | LTV_SUPPLY_CURRENT(5)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		goto err_power2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	msleep(55);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	/* Instruction Setting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	ret = ltv350qv_write_reg(lcd, LTV_IFCTL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 				 LTV_NMD | LTV_REV | LTV_NL(0x1d));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	ret |= ltv350qv_write_reg(lcd, LTV_DATACTL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				  LTV_DS_SAME | LTV_CHS_480
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				  | LTV_DF_RGB | LTV_RGB_BGR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	ret |= ltv350qv_write_reg(lcd, LTV_ENTRY_MODE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				  LTV_VSPL_ACTIVE_LOW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 				  | LTV_HSPL_ACTIVE_LOW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 				  | LTV_DPL_SAMPLE_RISING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 				  | LTV_EPL_ACTIVE_LOW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 				  | LTV_SS_RIGHT_TO_LEFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL1, LTV_CLW(3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 				  LTV_NW_INV_1LINE | LTV_FWI(3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	ret |= ltv350qv_write_reg(lcd, LTV_VBP, 0x000a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ret |= ltv350qv_write_reg(lcd, LTV_HBP, 0x0021);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	ret |= ltv350qv_write_reg(lcd, LTV_SOTCTL, LTV_SDT(3) | LTV_EQ(0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(0), 0x0103);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(1), 0x0301);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(2), 0x1f0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(3), 0x1f0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(4), 0x0707);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(5), 0x0307);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(6), 0x0707);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(7), 0x0000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(8), 0x0004);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(9), 0x0000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		goto err_settings;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	/* Wait more than 2 frames */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	msleep(20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	/* Display On Sequence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 				 LTV_VCOM_DISABLE | LTV_VCOMOUT_ENABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 				 | LTV_POWER_ON | LTV_DRIVE_CURRENT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				 | LTV_SUPPLY_CURRENT(5));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 				  LTV_NW_INV_1LINE | LTV_DSC | LTV_FWI(3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		goto err_disp_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	/* Display should now be ON. Phew. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) err_disp_on:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	 * Try to recover. Error handling probably isn't very useful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	 * at this point, just make a best effort to switch the panel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	 * off.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	ltv350qv_write_reg(lcd, LTV_PWRCTL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			   LTV_VCOM_DISABLE | LTV_DRIVE_CURRENT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			   | LTV_SUPPLY_CURRENT(5));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	ltv350qv_write_reg(lcd, LTV_GATECTL2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			   LTV_NW_INV_1LINE | LTV_FWI(3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) err_settings:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) err_power2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) err_power1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	usleep_range(1000, 1100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int ltv350qv_power_off(struct ltv350qv *lcd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	/* Display Off Sequence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				 LTV_VCOM_DISABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 				 | LTV_DRIVE_CURRENT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				 | LTV_SUPPLY_CURRENT(5));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 				  LTV_NW_INV_1LINE | LTV_FWI(3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	/* Power down setting 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	/* Wait at least 1 ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	usleep_range(1000, 1100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	/* Power down setting 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	 * No point in trying to recover here. If we can't switch the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	 * panel off, what are we supposed to do other than inform the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	 * user about the failure?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	/* Display power should now be OFF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static int ltv350qv_power(struct ltv350qv *lcd, int power)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		ret = ltv350qv_power_on(lcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		ret = ltv350qv_power_off(lcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		lcd->power = power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int ltv350qv_set_power(struct lcd_device *ld, int power)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	struct ltv350qv *lcd = lcd_get_data(ld);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	return ltv350qv_power(lcd, power);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static int ltv350qv_get_power(struct lcd_device *ld)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	struct ltv350qv *lcd = lcd_get_data(ld);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	return lcd->power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static struct lcd_ops ltv_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	.get_power	= ltv350qv_get_power,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	.set_power	= ltv350qv_set_power,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static int ltv350qv_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	struct ltv350qv *lcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct lcd_device *ld;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	lcd = devm_kzalloc(&spi->dev, sizeof(struct ltv350qv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (!lcd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	lcd->spi = spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	lcd->power = FB_BLANK_POWERDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	lcd->buffer = devm_kzalloc(&spi->dev, 8, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	if (!lcd->buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	ld = devm_lcd_device_register(&spi->dev, "ltv350qv", &spi->dev, lcd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 					&ltv_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (IS_ERR(ld))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		return PTR_ERR(ld);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	lcd->ld = ld;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	spi_set_drvdata(spi, lcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int ltv350qv_remove(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	struct ltv350qv *lcd = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static int ltv350qv_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	struct ltv350qv *lcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static int ltv350qv_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	struct ltv350qv *lcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	return ltv350qv_power(lcd, FB_BLANK_UNBLANK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static SIMPLE_DEV_PM_OPS(ltv350qv_pm_ops, ltv350qv_suspend, ltv350qv_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) /* Power down all displays on reboot, poweroff or halt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static void ltv350qv_shutdown(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	struct ltv350qv *lcd = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static struct spi_driver ltv350qv_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		.name		= "ltv350qv",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		.pm		= &ltv350qv_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	.probe		= ltv350qv_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.remove		= ltv350qv_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.shutdown	= ltv350qv_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) module_spi_driver(ltv350qv_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) MODULE_ALIAS("spi:ltv350qv");