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![Dmitry Osipenko](/assets/img/avatar_default.png)
Correct power-off programming sequence in order to fix shutting down devices which are using TPS65910 PMIC. In accordance to the TPS65910 datasheet, the PMIC's state-machine transitions into the OFF state only when DEV_OFF bit of DEVCTRL_REG is set. The ON / SLEEP states also should be cleared, otherwise PMIC won't get into a proper state on shutdown. Devices like Nexus 7 tablet and Ouya game console are shutting down properly now. Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Zack Pearsall <zpearsall@yahoo.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
543 lines
13 KiB
C
543 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* tps65910.c -- TI TPS6591x chip family multi-function driver
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*
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* Copyright 2010 Texas Instruments Inc.
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*
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
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*/
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/mfd/core.h>
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#include <linux/regmap.h>
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#include <linux/mfd/tps65910.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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static const struct resource rtc_resources[] = {
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{
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.start = TPS65910_IRQ_RTC_ALARM,
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.end = TPS65910_IRQ_RTC_ALARM,
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.flags = IORESOURCE_IRQ,
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}
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};
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static const struct mfd_cell tps65910s[] = {
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{
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.name = "tps65910-gpio",
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},
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{
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.name = "tps65910-pmic",
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},
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{
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.name = "tps65910-rtc",
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.num_resources = ARRAY_SIZE(rtc_resources),
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.resources = &rtc_resources[0],
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},
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{
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.name = "tps65910-power",
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},
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};
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static const struct regmap_irq tps65911_irqs[] = {
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/* INT_STS */
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[TPS65911_IRQ_PWRHOLD_F] = {
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.mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_VBAT_VMHI] = {
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.mask = INT_MSK_VMBHI_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_PWRON] = {
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.mask = INT_MSK_PWRON_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_PWRON_LP] = {
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.mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_PWRHOLD_R] = {
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.mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_HOTDIE] = {
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.mask = INT_MSK_HOTDIE_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_RTC_ALARM] = {
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.mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65911_IRQ_RTC_PERIOD] = {
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.mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
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.reg_offset = 0,
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},
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/* INT_STS2 */
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[TPS65911_IRQ_GPIO0_R] = {
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.mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO0_F] = {
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.mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO1_R] = {
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.mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO1_F] = {
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.mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO2_R] = {
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.mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO2_F] = {
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.mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO3_R] = {
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.mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65911_IRQ_GPIO3_F] = {
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.mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
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.reg_offset = 1,
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},
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/* INT_STS2 */
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[TPS65911_IRQ_GPIO4_R] = {
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.mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_GPIO4_F] = {
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.mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_GPIO5_R] = {
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.mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_GPIO5_F] = {
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.mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_WTCHDG] = {
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.mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_VMBCH2_H] = {
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.mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_VMBCH2_L] = {
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.mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
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.reg_offset = 2,
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},
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[TPS65911_IRQ_PWRDN] = {
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.mask = INT_MSK3_PWRDN_IT_MSK_MASK,
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.reg_offset = 2,
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},
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};
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static const struct regmap_irq tps65910_irqs[] = {
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/* INT_STS */
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[TPS65910_IRQ_VBAT_VMBDCH] = {
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.mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_VBAT_VMHI] = {
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.mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_PWRON] = {
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.mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_PWRON_LP] = {
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.mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_PWRHOLD] = {
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.mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_HOTDIE] = {
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.mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_RTC_ALARM] = {
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.mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
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.reg_offset = 0,
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},
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[TPS65910_IRQ_RTC_PERIOD] = {
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.mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
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.reg_offset = 0,
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},
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/* INT_STS2 */
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[TPS65910_IRQ_GPIO_R] = {
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.mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
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.reg_offset = 1,
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},
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[TPS65910_IRQ_GPIO_F] = {
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.mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
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.reg_offset = 1,
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},
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};
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static struct regmap_irq_chip tps65911_irq_chip = {
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.name = "tps65910",
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.irqs = tps65911_irqs,
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.num_irqs = ARRAY_SIZE(tps65911_irqs),
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.num_regs = 3,
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.irq_reg_stride = 2,
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.status_base = TPS65910_INT_STS,
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.mask_base = TPS65910_INT_MSK,
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.ack_base = TPS65910_INT_STS,
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};
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static struct regmap_irq_chip tps65910_irq_chip = {
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.name = "tps65910",
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.irqs = tps65910_irqs,
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.num_irqs = ARRAY_SIZE(tps65910_irqs),
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.num_regs = 2,
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.irq_reg_stride = 2,
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.status_base = TPS65910_INT_STS,
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.mask_base = TPS65910_INT_MSK,
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.ack_base = TPS65910_INT_STS,
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};
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static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
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struct tps65910_platform_data *pdata)
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{
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int ret;
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static struct regmap_irq_chip *tps6591x_irqs_chip;
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if (!irq) {
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dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
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return -EINVAL;
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}
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if (!pdata) {
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dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
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return -EINVAL;
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}
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switch (tps65910_chip_id(tps65910)) {
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case TPS65910:
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tps6591x_irqs_chip = &tps65910_irq_chip;
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break;
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case TPS65911:
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tps6591x_irqs_chip = &tps65911_irq_chip;
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break;
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}
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tps65910->chip_irq = irq;
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ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap,
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tps65910->chip_irq,
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IRQF_ONESHOT, pdata->irq_base,
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tps6591x_irqs_chip, &tps65910->irq_data);
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if (ret < 0) {
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dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
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tps65910->chip_irq = 0;
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}
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return ret;
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}
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static bool is_volatile_reg(struct device *dev, unsigned int reg)
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{
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struct tps65910 *tps65910 = dev_get_drvdata(dev);
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/*
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* Caching all regulator registers.
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* All regualator register address range is same for
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* TPS65910 and TPS65911
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*/
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if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
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/* Check for non-existing register */
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if (tps65910_chip_id(tps65910) == TPS65910)
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if ((reg == TPS65911_VDDCTRL_OP) ||
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(reg == TPS65911_VDDCTRL_SR))
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return true;
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return false;
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}
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return true;
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}
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static const struct regmap_config tps65910_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.volatile_reg = is_volatile_reg,
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.max_register = TPS65910_MAX_REGISTER - 1,
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.cache_type = REGCACHE_RBTREE,
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};
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static int tps65910_ck32k_init(struct tps65910 *tps65910,
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struct tps65910_board *pmic_pdata)
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{
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int ret;
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if (!pmic_pdata->en_ck32k_xtal)
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return 0;
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ret = regmap_clear_bits(tps65910->regmap, TPS65910_DEVCTRL,
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DEVCTRL_CK32K_CTRL_MASK);
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if (ret < 0) {
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dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int tps65910_sleepinit(struct tps65910 *tps65910,
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struct tps65910_board *pmic_pdata)
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{
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struct device *dev;
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int ret;
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if (!pmic_pdata->en_dev_slp)
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return 0;
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dev = tps65910->dev;
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/* enabling SLEEP device state */
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ret = regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
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DEVCTRL_DEV_SLP_MASK);
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if (ret < 0) {
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dev_err(dev, "set dev_slp failed: %d\n", ret);
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goto err_sleep_init;
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}
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if (pmic_pdata->slp_keepon.therm_keepon) {
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ret = regmap_set_bits(tps65910->regmap,
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TPS65910_SLEEP_KEEP_RES_ON,
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SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
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if (ret < 0) {
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dev_err(dev, "set therm_keepon failed: %d\n", ret);
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goto disable_dev_slp;
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}
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}
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if (pmic_pdata->slp_keepon.clkout32k_keepon) {
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ret = regmap_set_bits(tps65910->regmap,
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TPS65910_SLEEP_KEEP_RES_ON,
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SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
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if (ret < 0) {
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dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
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goto disable_dev_slp;
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}
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}
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if (pmic_pdata->slp_keepon.i2chs_keepon) {
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ret = regmap_set_bits(tps65910->regmap,
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TPS65910_SLEEP_KEEP_RES_ON,
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SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
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if (ret < 0) {
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dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
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goto disable_dev_slp;
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}
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}
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return 0;
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disable_dev_slp:
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regmap_clear_bits(tps65910->regmap, TPS65910_DEVCTRL,
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DEVCTRL_DEV_SLP_MASK);
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err_sleep_init:
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return ret;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id tps65910_of_match[] = {
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{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
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{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
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{ },
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};
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static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
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unsigned long *chip_id)
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{
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struct device_node *np = client->dev.of_node;
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struct tps65910_board *board_info;
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unsigned int prop;
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const struct of_device_id *match;
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int ret;
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match = of_match_device(tps65910_of_match, &client->dev);
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if (!match) {
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dev_err(&client->dev, "Failed to find matching dt id\n");
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return NULL;
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}
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*chip_id = (unsigned long)match->data;
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board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
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GFP_KERNEL);
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if (!board_info)
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return NULL;
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ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
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if (!ret)
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board_info->vmbch_threshold = prop;
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ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
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if (!ret)
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board_info->vmbch2_threshold = prop;
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prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
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board_info->en_ck32k_xtal = prop;
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prop = of_property_read_bool(np, "ti,sleep-enable");
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board_info->en_dev_slp = prop;
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prop = of_property_read_bool(np, "ti,sleep-keep-therm");
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board_info->slp_keepon.therm_keepon = prop;
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prop = of_property_read_bool(np, "ti,sleep-keep-ck32k");
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board_info->slp_keepon.clkout32k_keepon = prop;
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prop = of_property_read_bool(np, "ti,sleep-keep-hsclk");
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board_info->slp_keepon.i2chs_keepon = prop;
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board_info->irq = client->irq;
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board_info->irq_base = -1;
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board_info->pm_off = of_property_read_bool(np,
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"ti,system-power-controller");
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return board_info;
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}
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#else
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static inline
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struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
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unsigned long *chip_id)
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{
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return NULL;
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}
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#endif
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static struct i2c_client *tps65910_i2c_client;
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static void tps65910_power_off(void)
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{
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struct tps65910 *tps65910;
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tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
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/*
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* The PWR_OFF bit needs to be set separately, before transitioning
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* to the OFF state. It enables the "sequential" power-off mode on
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* TPS65911, it's a NO-OP on TPS65910.
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*/
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if (regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
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DEVCTRL_PWR_OFF_MASK) < 0)
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return;
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regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL,
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DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK,
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DEVCTRL_DEV_OFF_MASK);
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}
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static int tps65910_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct tps65910 *tps65910;
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struct tps65910_board *pmic_plat_data;
|
|
struct tps65910_board *of_pmic_plat_data = NULL;
|
|
struct tps65910_platform_data *init_data;
|
|
unsigned long chip_id = id->driver_data;
|
|
int ret;
|
|
|
|
pmic_plat_data = dev_get_platdata(&i2c->dev);
|
|
|
|
if (!pmic_plat_data && i2c->dev.of_node) {
|
|
pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
|
|
of_pmic_plat_data = pmic_plat_data;
|
|
}
|
|
|
|
if (!pmic_plat_data)
|
|
return -EINVAL;
|
|
|
|
init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
|
|
if (init_data == NULL)
|
|
return -ENOMEM;
|
|
|
|
tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
|
|
if (tps65910 == NULL)
|
|
return -ENOMEM;
|
|
|
|
tps65910->of_plat_data = of_pmic_plat_data;
|
|
i2c_set_clientdata(i2c, tps65910);
|
|
tps65910->dev = &i2c->dev;
|
|
tps65910->i2c_client = i2c;
|
|
tps65910->id = chip_id;
|
|
|
|
/* Work around silicon erratum SWCZ010: the tps65910 may miss the
|
|
* first I2C transfer. So issue a dummy transfer before the first
|
|
* real transfer.
|
|
*/
|
|
i2c_master_send(i2c, "", 1);
|
|
tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
|
|
if (IS_ERR(tps65910->regmap)) {
|
|
ret = PTR_ERR(tps65910->regmap);
|
|
dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
init_data->irq = pmic_plat_data->irq;
|
|
init_data->irq_base = pmic_plat_data->irq_base;
|
|
|
|
tps65910_irq_init(tps65910, init_data->irq, init_data);
|
|
tps65910_ck32k_init(tps65910, pmic_plat_data);
|
|
tps65910_sleepinit(tps65910, pmic_plat_data);
|
|
|
|
if (pmic_plat_data->pm_off && !pm_power_off) {
|
|
tps65910_i2c_client = i2c;
|
|
pm_power_off = tps65910_power_off;
|
|
}
|
|
|
|
ret = devm_mfd_add_devices(tps65910->dev, -1,
|
|
tps65910s, ARRAY_SIZE(tps65910s),
|
|
NULL, 0,
|
|
regmap_irq_get_domain(tps65910->irq_data));
|
|
if (ret < 0) {
|
|
dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct i2c_device_id tps65910_i2c_id[] = {
|
|
{ "tps65910", TPS65910 },
|
|
{ "tps65911", TPS65911 },
|
|
{ }
|
|
};
|
|
|
|
static struct i2c_driver tps65910_i2c_driver = {
|
|
.driver = {
|
|
.name = "tps65910",
|
|
.of_match_table = of_match_ptr(tps65910_of_match),
|
|
},
|
|
.probe = tps65910_i2c_probe,
|
|
.id_table = tps65910_i2c_id,
|
|
};
|
|
|
|
static int __init tps65910_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&tps65910_i2c_driver);
|
|
}
|
|
/* init early so consumer devices can complete system boot */
|
|
subsys_initcall(tps65910_i2c_init);
|