Release 4.11 drivers/mfd/rtl8411.c

/* Driver for Realtek PCI-Express card reader
 *
 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Author:
 *   Wei WANG <wei_wang@realsil.com.cn>
 *   Roger Tseng <rogerable@realtek.com>
 */

#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/mfd/rtsx_pci.h>

#include "rtsx_pcr.h"



static u8 rtl8411_get_ic_version(struct rtsx_pcr *pcr)
{
	u8 val;

	rtsx_pci_read_register(pcr, SYS_VER, &val);
	return val & 0x0F;
}

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static int rtl8411b_is_qfn48(struct rtsx_pcr *pcr)
{
	u8 val = 0;

	rtsx_pci_read_register(pcr, RTL8411B_PACKAGE_MODE, &val);

	if (val & 0x2)
		return 1;
	else
		return 0;
}

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static void rtl8411_fetch_vendor_settings(struct rtsx_pcr *pcr)
{
	u32 reg1 = 0;
	u8 reg3 = 0;

	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg1);
	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg1);

	if (!rtsx_vendor_setting_valid(reg1))
		return;

	pcr->aspm_en = rtsx_reg_to_aspm(reg1);
	pcr->sd30_drive_sel_1v8 =
		map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg1));
	pcr->card_drive_sel &= 0x3F;
	pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg1);

	rtsx_pci_read_config_byte(pcr, PCR_SETTING_REG3, &reg3);
	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG3, reg3);
	pcr->sd30_drive_sel_3v3 = rtl8411_reg_to_sd30_drive_sel_3v3(reg3);
}

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static void rtl8411b_fetch_vendor_settings(struct rtsx_pcr *pcr)
{
	u32 reg = 0;

	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);

	if (!rtsx_vendor_setting_valid(reg))
		return;

	pcr->aspm_en = rtsx_reg_to_aspm(reg);
	pcr->sd30_drive_sel_1v8 =
		map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
	pcr->sd30_drive_sel_3v3 =
		map_sd_drive(rtl8411b_reg_to_sd30_drive_sel_3v3(reg));
}

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static void rtl8411_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
{
	rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07);
}

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static int rtl8411_extra_init_hw(struct rtsx_pcr *pcr)
{
	rtsx_pci_init_cmd(pcr);

	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
			0xFF, pcr->sd30_drive_sel_3v3);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CD_PAD_CTL,
			CD_DISABLE_MASK | CD_AUTO_DISABLE, CD_ENABLE);

	return rtsx_pci_send_cmd(pcr, 100);
}

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static int rtl8411b_extra_init_hw(struct rtsx_pcr *pcr)
{
	rtsx_pci_init_cmd(pcr);

	if (rtl8411b_is_qfn48(pcr))
		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
				CARD_PULL_CTL3, 0xFF, 0xF5);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
			0xFF, pcr->sd30_drive_sel_3v3);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CD_PAD_CTL,
			CD_DISABLE_MASK | CD_AUTO_DISABLE, CD_ENABLE);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, FUNC_FORCE_CTL,
			0x06, 0x00);

	return rtsx_pci_send_cmd(pcr, 100);
}

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static int rtl8411_turn_on_led(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
}

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static int rtl8411_turn_off_led(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
}

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static int rtl8411_enable_auto_blink(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
}

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static int rtl8411_disable_auto_blink(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
}

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static int rtl8411_card_power_on(struct rtsx_pcr *pcr, int card)
{
	int err;

	rtsx_pci_init_cmd(pcr);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
			BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_CTL,
			BPP_LDO_POWB, BPP_LDO_SUSPEND);
	err = rtsx_pci_send_cmd(pcr, 100);
	if (err < 0)
		return err;

	/* To avoid too large in-rush current */
	udelay(150);

	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
			BPP_POWER_MASK, BPP_POWER_10_PERCENT_ON);
	if (err < 0)
		return err;

	udelay(150);

	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
			BPP_POWER_MASK, BPP_POWER_15_PERCENT_ON);
	if (err < 0)
		return err;

	udelay(150);

	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
			BPP_POWER_MASK, BPP_POWER_ON);
	if (err < 0)
		return err;

	return rtsx_pci_write_register(pcr, LDO_CTL, BPP_LDO_POWB, BPP_LDO_ON);
}

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static int rtl8411_card_power_off(struct rtsx_pcr *pcr, int card)
{
	int err;

	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
			BPP_POWER_MASK, BPP_POWER_OFF);
	if (err < 0)
		return err;

	return rtsx_pci_write_register(pcr, LDO_CTL,
			BPP_LDO_POWB, BPP_LDO_SUSPEND);
}

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static int rtl8411_do_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage,
		int bpp_tuned18_shift, int bpp_asic_1v8)
{
	u8 mask, val;
	int err;

	mask = (BPP_REG_TUNED18 << bpp_tuned18_shift) | BPP_PAD_MASK;
	if (voltage == OUTPUT_3V3) {
		err = rtsx_pci_write_register(pcr,
				SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
		if (err < 0)
			return err;
		val = (BPP_ASIC_3V3 << bpp_tuned18_shift) | BPP_PAD_3V3;
	} else if (voltage == OUTPUT_1V8) {
		err = rtsx_pci_write_register(pcr,
				SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
		if (err < 0)
			return err;
		val = (bpp_asic_1v8 << bpp_tuned18_shift) | BPP_PAD_1V8;
	} else {
		return -EINVAL;
	}

	return rtsx_pci_write_register(pcr, LDO_CTL, mask, val);
}

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static int rtl8411_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
{
	return rtl8411_do_switch_output_voltage(pcr, voltage,
			BPP_TUNED18_SHIFT_8411, BPP_ASIC_1V8);
}

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static int rtl8402_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
{
	return rtl8411_do_switch_output_voltage(pcr, voltage,
			BPP_TUNED18_SHIFT_8402, BPP_ASIC_2V0);
}

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static unsigned int rtl8411_cd_deglitch(struct rtsx_pcr *pcr)
{
	unsigned int card_exist;

	card_exist = rtsx_pci_readl(pcr, RTSX_BIPR);
	card_exist &= CARD_EXIST;
	if (!card_exist) {
		/* Enable card CD */
		rtsx_pci_write_register(pcr, CD_PAD_CTL,
				CD_DISABLE_MASK, CD_ENABLE);
		/* Enable card interrupt */
		rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x00);
		return 0;
	}

	if (hweight32(card_exist) > 1) {
		rtsx_pci_write_register(pcr, CARD_PWR_CTL,
				BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON);
		msleep(100);

		card_exist = rtsx_pci_readl(pcr, RTSX_BIPR);
		if (card_exist & MS_EXIST)
			card_exist = MS_EXIST;
		else if (card_exist & SD_EXIST)
			card_exist = SD_EXIST;
		else
			card_exist = 0;

		rtsx_pci_write_register(pcr, CARD_PWR_CTL,
				BPP_POWER_MASK, BPP_POWER_OFF);

		pcr_dbg(pcr, "After CD deglitch, card_exist = 0x%x\n",
			card_exist);
	}

	if (card_exist & MS_EXIST) {
		/* Disable SD interrupt */
		rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x40);
		rtsx_pci_write_register(pcr, CD_PAD_CTL,
				CD_DISABLE_MASK, MS_CD_EN_ONLY);
	} else if (card_exist & SD_EXIST) {
		/* Disable MS interrupt */
		rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x80);
		rtsx_pci_write_register(pcr, CD_PAD_CTL,
				CD_DISABLE_MASK, SD_CD_EN_ONLY);
	}

	return card_exist;
}

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static int rtl8411_conv_clk_and_div_n(int input, int dir)
{
	int output;

	if (dir == CLK_TO_DIV_N)
		output = input * 4 / 5 - 2;
	else
		output = (input + 2) * 5 / 4;

	return output;
}

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static const struct pcr_ops rtl8411_pcr_ops = {
	.fetch_vendor_settings = rtl8411_fetch_vendor_settings,
	.extra_init_hw = rtl8411_extra_init_hw,
	.optimize_phy = NULL,
	.turn_on_led = rtl8411_turn_on_led,
	.turn_off_led = rtl8411_turn_off_led,
	.enable_auto_blink = rtl8411_enable_auto_blink,
	.disable_auto_blink = rtl8411_disable_auto_blink,
	.card_power_on = rtl8411_card_power_on,
	.card_power_off = rtl8411_card_power_off,
	.switch_output_voltage = rtl8411_switch_output_voltage,
	.cd_deglitch = rtl8411_cd_deglitch,
	.conv_clk_and_div_n = rtl8411_conv_clk_and_div_n,
	.force_power_down = rtl8411_force_power_down,
};


static const struct pcr_ops rtl8402_pcr_ops = {
	.fetch_vendor_settings = rtl8411_fetch_vendor_settings,
	.extra_init_hw = rtl8411_extra_init_hw,
	.optimize_phy = NULL,
	.turn_on_led = rtl8411_turn_on_led,
	.turn_off_led = rtl8411_turn_off_led,
	.enable_auto_blink = rtl8411_enable_auto_blink,
	.disable_auto_blink = rtl8411_disable_auto_blink,
	.card_power_on = rtl8411_card_power_on,
	.card_power_off = rtl8411_card_power_off,
	.switch_output_voltage = rtl8402_switch_output_voltage,
	.cd_deglitch = rtl8411_cd_deglitch,
	.conv_clk_and_div_n = rtl8411_conv_clk_and_div_n,
	.force_power_down = rtl8411_force_power_down,
};


static const struct pcr_ops rtl8411b_pcr_ops = {
	.fetch_vendor_settings = rtl8411b_fetch_vendor_settings,
	.extra_init_hw = rtl8411b_extra_init_hw,
	.optimize_phy = NULL,
	.turn_on_led = rtl8411_turn_on_led,
	.turn_off_led = rtl8411_turn_off_led,
	.enable_auto_blink = rtl8411_enable_auto_blink,
	.disable_auto_blink = rtl8411_disable_auto_blink,
	.card_power_on = rtl8411_card_power_on,
	.card_power_off = rtl8411_card_power_off,
	.switch_output_voltage = rtl8411_switch_output_voltage,
	.cd_deglitch = rtl8411_cd_deglitch,
	.conv_clk_and_div_n = rtl8411_conv_clk_and_div_n,
	.force_power_down = rtl8411_force_power_down,
};

/* SD Pull Control Enable:
 *     SD_DAT[3:0] ==> pull up
 *     SD_CD       ==> pull up
 *     SD_WP       ==> pull up
 *     SD_CMD      ==> pull up
 *     SD_CLK      ==> pull down
 */

static const u32 rtl8411_sd_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xA9),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x09),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	0,
};

/* SD Pull Control Disable:
 *     SD_DAT[3:0] ==> pull down
 *     SD_CD       ==> pull up
 *     SD_WP       ==> pull down
 *     SD_CMD      ==> pull down
 *     SD_CLK      ==> pull down
 */

static const u32 rtl8411_sd_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	0,
};

/* MS Pull Control Enable:
 *     MS CD       ==> pull up
 *     others      ==> pull down
 */

static const u32 rtl8411_ms_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x05),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	0,
};

/* MS Pull Control Disable:
 *     MS CD       ==> pull up
 *     others      ==> pull down
 */

static const u32 rtl8411_ms_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	0,
};


static const u32 rtl8411b_qfn64_sd_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x09 | 0xD0),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};


static const u32 rtl8411b_qfn48_sd_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x69 | 0x90),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x08 | 0x11),
	0,
};


static const u32 rtl8411b_qfn64_sd_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x05 | 0xD0),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};


static const u32 rtl8411b_qfn48_sd_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x65 | 0x90),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};


static const u32 rtl8411b_qfn64_ms_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x05 | 0xD0),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x05 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};


static const u32 rtl8411b_qfn48_ms_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x65 | 0x90),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};


static const u32 rtl8411b_qfn64_ms_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x05 | 0xD0),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05 | 0x50),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};


static const u32 rtl8411b_qfn48_ms_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x65 | 0x90),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04 | 0x11),
	0,
};



static void rtl8411_init_common_params(struct rtsx_pcr *pcr)
{
	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
	pcr->num_slots = 2;
	pcr->flags = 0;
	pcr->card_drive_sel = RTL8411_CARD_DRIVE_DEFAULT;
	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
	pcr->aspm_en = ASPM_L1_EN;
	pcr->tx_initial_phase = SET_CLOCK_PHASE(23, 7, 14);
	pcr->rx_initial_phase = SET_CLOCK_PHASE(4, 3, 10);
	pcr->ic_version = rtl8411_get_ic_version(pcr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Wei Wang
56
62.22%
2
40.00%
Roger Tseng
32
35.56%
1
20.00%
Wei Yongjun
1
1.11%
1
20.00%
Micky Ching
1
1.11%
1
20.00%
Total
90
100.00%
5
100.00%



void rtl8411_init_params(struct rtsx_pcr *pcr)
{
	rtl8411_init_common_params(pcr);
	pcr->ops = &rtl8411_pcr_ops;
	set_pull_ctrl_tables(pcr, rtl8411);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Tseng
15
51.72%
1
25.00%
Micky Ching
9
31.03%
1
25.00%
Wei Wang
5
17.24%
2
50.00%
Total
29
100.00%
4
100.00%



void rtl8411b_init_params(struct rtsx_pcr *pcr)
{
	rtl8411_init_common_params(pcr);
	pcr->ops = &rtl8411b_pcr_ops;
	if (rtl8411b_is_qfn48(pcr))
		set_pull_ctrl_tables(pcr, rtl8411b_qfn48);
	else
		set_pull_ctrl_tables(pcr, rtl8411b_qfn64);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Micky Ching
23
52.27%
1
33.33%
Roger Tseng
15
34.09%
1
33.33%
Wei Wang
6
13.64%
1
33.33%
Total
44
100.00%
3
100.00%



void rtl8402_init_params(struct rtsx_pcr *pcr)
{
	rtl8411_init_common_params(pcr);
	pcr->ops = &rtl8402_pcr_ops;
	set_pull_ctrl_tables(pcr, rtl8411);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Micky Ching
29
100.00%
1
100.00%
Total
29
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Wei Wang
1364
61.89%
9
56.25%
Roger Tseng
631
28.63%
2
12.50%
Micky Ching
202
9.17%
3
18.75%
Lee Jones
6
0.27%
1
6.25%
Wei Yongjun
1
0.05%
1
6.25%
Total
2204
100.00%
16
100.00%
Directory: drivers/mfd

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