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path: root/drivers/rtc/rtc-twl.c
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Diffstat (limited to 'drivers/rtc/rtc-twl.c')
-rw-r--r--drivers/rtc/rtc-twl.c303
1 files changed, 180 insertions, 123 deletions
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 02faf3c4e0d5..e6106e67e1f4 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* rtc-twl.c -- TWL Real Time Clock interface
*
@@ -11,13 +12,10 @@
* Copyright (C) 2003 MontaVista Software, Inc.
* Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
* Copyright (C) 2006 David Brownell
- *
- * 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 of the License, or (at your option) any later version.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
@@ -29,8 +27,12 @@
#include <linux/interrupt.h>
#include <linux/of.h>
-#include <linux/i2c/twl.h>
+#include <linux/mfd/twl.h>
+enum twl_class {
+ TWL_4030 = 0,
+ TWL_6030,
+};
/*
* RTC block register offsets (use TWL_MODULE_RTC)
@@ -134,59 +136,66 @@ static const u8 twl6030_rtc_reg_map[] = {
#define ALL_TIME_REGS 6
/*----------------------------------------------------------------------*/
-static u8 *rtc_reg_map;
+struct twl_rtc {
+ struct device *dev;
+ struct rtc_device *rtc;
+ u8 *reg_map;
+ /*
+ * Cache the value for timer/alarm interrupts register; this is
+ * only changed by callers holding rtc ops lock (or resume).
+ */
+ unsigned char rtc_irq_bits;
+ bool wake_enabled;
+#ifdef CONFIG_PM_SLEEP
+ unsigned char irqstat;
+#endif
+ enum twl_class class;
+};
/*
* Supports 1 byte read from TWL RTC register.
*/
-static int twl_rtc_read_u8(u8 *data, u8 reg)
+static int twl_rtc_read_u8(struct twl_rtc *twl_rtc, u8 *data, u8 reg)
{
int ret;
- ret = twl_i2c_read_u8(TWL_MODULE_RTC, data, (rtc_reg_map[reg]));
+ ret = twl_i2c_read_u8(TWL_MODULE_RTC, data, (twl_rtc->reg_map[reg]));
if (ret < 0)
- pr_err("twl_rtc: Could not read TWL"
- "register %X - error %d\n", reg, ret);
+ pr_err("Could not read TWL register %X - error %d\n", reg, ret);
return ret;
}
/*
* Supports 1 byte write to TWL RTC registers.
*/
-static int twl_rtc_write_u8(u8 data, u8 reg)
+static int twl_rtc_write_u8(struct twl_rtc *twl_rtc, u8 data, u8 reg)
{
int ret;
- ret = twl_i2c_write_u8(TWL_MODULE_RTC, data, (rtc_reg_map[reg]));
+ ret = twl_i2c_write_u8(TWL_MODULE_RTC, data, (twl_rtc->reg_map[reg]));
if (ret < 0)
- pr_err("twl_rtc: Could not write TWL"
- "register %X - error %d\n", reg, ret);
+ pr_err("Could not write TWL register %X - error %d\n",
+ reg, ret);
return ret;
}
/*
- * Cache the value for timer/alarm interrupts register; this is
- * only changed by callers holding rtc ops lock (or resume).
- */
-static unsigned char rtc_irq_bits;
-
-/*
* Enable 1/second update and/or alarm interrupts.
*/
-static int set_rtc_irq_bit(unsigned char bit)
+static int set_rtc_irq_bit(struct twl_rtc *twl_rtc, unsigned char bit)
{
unsigned char val;
int ret;
/* if the bit is set, return from here */
- if (rtc_irq_bits & bit)
+ if (twl_rtc->rtc_irq_bits & bit)
return 0;
- val = rtc_irq_bits | bit;
+ val = twl_rtc->rtc_irq_bits | bit;
val &= ~BIT_RTC_INTERRUPTS_REG_EVERY_M;
- ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG);
+ ret = twl_rtc_write_u8(twl_rtc, val, REG_RTC_INTERRUPTS_REG);
if (ret == 0)
- rtc_irq_bits = val;
+ twl_rtc->rtc_irq_bits = val;
return ret;
}
@@ -194,19 +203,19 @@ static int set_rtc_irq_bit(unsigned char bit)
/*
* Disable update and/or alarm interrupts.
*/
-static int mask_rtc_irq_bit(unsigned char bit)
+static int mask_rtc_irq_bit(struct twl_rtc *twl_rtc, unsigned char bit)
{
unsigned char val;
int ret;
/* if the bit is clear, return from here */
- if (!(rtc_irq_bits & bit))
+ if (!(twl_rtc->rtc_irq_bits & bit))
return 0;
- val = rtc_irq_bits & ~bit;
- ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG);
+ val = twl_rtc->rtc_irq_bits & ~bit;
+ ret = twl_rtc_write_u8(twl_rtc, val, REG_RTC_INTERRUPTS_REG);
if (ret == 0)
- rtc_irq_bits = val;
+ twl_rtc->rtc_irq_bits = val;
return ret;
}
@@ -214,21 +223,23 @@ static int mask_rtc_irq_bit(unsigned char bit)
static int twl_rtc_alarm_irq_enable(struct device *dev, unsigned enabled)
{
struct platform_device *pdev = to_platform_device(dev);
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
int irq = platform_get_irq(pdev, 0);
- static bool twl_rtc_wake_enabled;
int ret;
if (enabled) {
- ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
- if (device_can_wakeup(dev) && !twl_rtc_wake_enabled) {
+ ret = set_rtc_irq_bit(twl_rtc,
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ if (device_can_wakeup(dev) && !twl_rtc->wake_enabled) {
enable_irq_wake(irq);
- twl_rtc_wake_enabled = true;
+ twl_rtc->wake_enabled = true;
}
} else {
- ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
- if (twl_rtc_wake_enabled) {
+ ret = mask_rtc_irq_bit(twl_rtc,
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ if (twl_rtc->wake_enabled) {
disable_irq_wake(irq);
- twl_rtc_wake_enabled = false;
+ twl_rtc->wake_enabled = false;
}
}
@@ -246,21 +257,23 @@ static int twl_rtc_alarm_irq_enable(struct device *dev, unsigned enabled)
*/
static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
unsigned char rtc_data[ALL_TIME_REGS];
int ret;
u8 save_control;
u8 rtc_control;
- ret = twl_rtc_read_u8(&save_control, REG_RTC_CTRL_REG);
+ ret = twl_rtc_read_u8(twl_rtc, &save_control, REG_RTC_CTRL_REG);
if (ret < 0) {
dev_err(dev, "%s: reading CTRL_REG, error %d\n", __func__, ret);
return ret;
}
/* for twl6030/32 make sure BIT_RTC_CTRL_REG_GET_TIME_M is clear */
- if (twl_class_is_6030()) {
+ if (twl_rtc->class == TWL_6030) {
if (save_control & BIT_RTC_CTRL_REG_GET_TIME_M) {
save_control &= ~BIT_RTC_CTRL_REG_GET_TIME_M;
- ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+ ret = twl_rtc_write_u8(twl_rtc, save_control,
+ REG_RTC_CTRL_REG);
if (ret < 0) {
dev_err(dev, "%s clr GET_TIME, error %d\n",
__func__, ret);
@@ -273,17 +286,17 @@ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm)
rtc_control = save_control | BIT_RTC_CTRL_REG_GET_TIME_M;
/* for twl6030/32 enable read access to static shadowed registers */
- if (twl_class_is_6030())
+ if (twl_rtc->class == TWL_6030)
rtc_control |= BIT_RTC_CTRL_REG_RTC_V_OPT;
- ret = twl_rtc_write_u8(rtc_control, REG_RTC_CTRL_REG);
+ ret = twl_rtc_write_u8(twl_rtc, rtc_control, REG_RTC_CTRL_REG);
if (ret < 0) {
dev_err(dev, "%s: writing CTRL_REG, error %d\n", __func__, ret);
return ret;
}
ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data,
- (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
+ (twl_rtc->reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
if (ret < 0) {
dev_err(dev, "%s: reading data, error %d\n", __func__, ret);
@@ -291,8 +304,8 @@ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm)
}
/* for twl6030 restore original state of rtc control register */
- if (twl_class_is_6030()) {
- ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+ if (twl_rtc->class == TWL_6030) {
+ ret = twl_rtc_write_u8(twl_rtc, save_control, REG_RTC_CTRL_REG);
if (ret < 0) {
dev_err(dev, "%s: restore CTRL_REG, error %d\n",
__func__, ret);
@@ -312,6 +325,7 @@ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
unsigned char save_control;
unsigned char rtc_data[ALL_TIME_REGS];
int ret;
@@ -324,18 +338,18 @@ static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm)
rtc_data[5] = bin2bcd(tm->tm_year - 100);
/* Stop RTC while updating the TC registers */
- ret = twl_rtc_read_u8(&save_control, REG_RTC_CTRL_REG);
+ ret = twl_rtc_read_u8(twl_rtc, &save_control, REG_RTC_CTRL_REG);
if (ret < 0)
goto out;
save_control &= ~BIT_RTC_CTRL_REG_STOP_RTC_M;
- ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+ ret = twl_rtc_write_u8(twl_rtc, save_control, REG_RTC_CTRL_REG);
if (ret < 0)
goto out;
/* update all the time registers in one shot */
ret = twl_i2c_write(TWL_MODULE_RTC, rtc_data,
- (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
+ (twl_rtc->reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
if (ret < 0) {
dev_err(dev, "rtc_set_time error %d\n", ret);
goto out;
@@ -343,7 +357,7 @@ static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm)
/* Start back RTC */
save_control |= BIT_RTC_CTRL_REG_STOP_RTC_M;
- ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+ ret = twl_rtc_write_u8(twl_rtc, save_control, REG_RTC_CTRL_REG);
out:
return ret;
@@ -354,11 +368,12 @@ out:
*/
static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
unsigned char rtc_data[ALL_TIME_REGS];
int ret;
ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data,
- (rtc_reg_map[REG_ALARM_SECONDS_REG]), ALL_TIME_REGS);
+ twl_rtc->reg_map[REG_ALARM_SECONDS_REG], ALL_TIME_REGS);
if (ret < 0) {
dev_err(dev, "rtc_read_alarm error %d\n", ret);
return ret;
@@ -373,7 +388,7 @@ static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
alm->time.tm_year = bcd2bin(rtc_data[5]) + 100;
/* report cached alarm enable state */
- if (rtc_irq_bits & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M)
+ if (twl_rtc->rtc_irq_bits & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M)
alm->enabled = 1;
return ret;
@@ -381,6 +396,8 @@ static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
static int twl_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
+
unsigned char alarm_data[ALL_TIME_REGS];
int ret;
@@ -397,7 +414,7 @@ static int twl_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
/* update all the alarm registers in one shot */
ret = twl_i2c_write(TWL_MODULE_RTC, alarm_data,
- (rtc_reg_map[REG_ALARM_SECONDS_REG]), ALL_TIME_REGS);
+ twl_rtc->reg_map[REG_ALARM_SECONDS_REG], ALL_TIME_REGS);
if (ret) {
dev_err(dev, "rtc_set_alarm error %d\n", ret);
goto out;
@@ -409,14 +426,15 @@ out:
return ret;
}
-static irqreturn_t twl_rtc_interrupt(int irq, void *rtc)
+static irqreturn_t twl_rtc_interrupt(int irq, void *data)
{
+ struct twl_rtc *twl_rtc = data;
unsigned long events;
int ret = IRQ_NONE;
int res;
u8 rd_reg;
- res = twl_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG);
+ res = twl_rtc_read_u8(twl_rtc, &rd_reg, REG_RTC_STATUS_REG);
if (res)
goto out;
/*
@@ -430,12 +448,12 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc)
else
events = RTC_IRQF | RTC_PF;
- res = twl_rtc_write_u8(BIT_RTC_STATUS_REG_ALARM_M,
- REG_RTC_STATUS_REG);
+ res = twl_rtc_write_u8(twl_rtc, BIT_RTC_STATUS_REG_ALARM_M,
+ REG_RTC_STATUS_REG);
if (res)
goto out;
- if (twl_class_is_4030()) {
+ if (twl_rtc->class == TWL_4030) {
/* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1
* needs 2 reads to clear the interrupt. One read is done in
* do_twl_pwrirq(). Doing the second read, to clear
@@ -454,14 +472,14 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc)
}
/* Notify RTC core on event */
- rtc_update_irq(rtc, 1, events);
+ rtc_update_irq(twl_rtc->rtc, 1, events);
ret = IRQ_HANDLED;
out:
return ret;
}
-static struct rtc_class_ops twl_rtc_ops = {
+static const struct rtc_class_ops twl_rtc_ops = {
.read_time = twl_rtc_read_time,
.set_time = twl_rtc_set_time,
.read_alarm = twl_rtc_read_alarm,
@@ -469,27 +487,55 @@ static struct rtc_class_ops twl_rtc_ops = {
.alarm_irq_enable = twl_rtc_alarm_irq_enable,
};
+static int twl_nvram_read(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ return twl_i2c_read((long)priv, val, offset, bytes);
+}
+
+static int twl_nvram_write(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ return twl_i2c_write((long)priv, val, offset, bytes);
+}
+
/*----------------------------------------------------------------------*/
static int twl_rtc_probe(struct platform_device *pdev)
{
- struct rtc_device *rtc;
+ struct twl_rtc *twl_rtc;
+ struct nvmem_config nvmem_cfg;
+ struct device_node *np = pdev->dev.of_node;
int ret = -EINVAL;
int irq = platform_get_irq(pdev, 0);
u8 rd_reg;
+ if (!np) {
+ dev_err(&pdev->dev, "no DT info\n");
+ return -EINVAL;
+ }
+
if (irq <= 0)
- goto out1;
+ return ret;
- /* Initialize the register map */
- if (twl_class_is_4030())
- rtc_reg_map = (u8 *)twl4030_rtc_reg_map;
- else
- rtc_reg_map = (u8 *)twl6030_rtc_reg_map;
+ twl_rtc = devm_kzalloc(&pdev->dev, sizeof(*twl_rtc), GFP_KERNEL);
+ if (!twl_rtc)
+ return -ENOMEM;
+
+ if (twl_class_is_4030()) {
+ twl_rtc->class = TWL_4030;
+ twl_rtc->reg_map = (u8 *)twl4030_rtc_reg_map;
+ } else if (twl_class_is_6030()) {
+ twl_rtc->class = TWL_6030;
+ twl_rtc->reg_map = (u8 *)twl6030_rtc_reg_map;
+ } else {
+ dev_err(&pdev->dev, "TWL Class not supported.\n");
+ return -EINVAL;
+ }
- ret = twl_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG);
+ ret = twl_rtc_read_u8(twl_rtc, &rd_reg, REG_RTC_STATUS_REG);
if (ret < 0)
- goto out1;
+ return ret;
if (rd_reg & BIT_RTC_STATUS_REG_POWER_UP_M)
dev_warn(&pdev->dev, "Power up reset detected.\n");
@@ -498,135 +544,146 @@ static int twl_rtc_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "Pending Alarm interrupt detected.\n");
/* Clear RTC Power up reset and pending alarm interrupts */
- ret = twl_rtc_write_u8(rd_reg, REG_RTC_STATUS_REG);
+ ret = twl_rtc_write_u8(twl_rtc, rd_reg, REG_RTC_STATUS_REG);
if (ret < 0)
- goto out1;
+ return ret;
- if (twl_class_is_6030()) {
+ if (twl_rtc->class == TWL_6030) {
twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK,
REG_INT_MSK_LINE_A);
twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK,
REG_INT_MSK_STS_A);
}
- dev_info(&pdev->dev, "Enabling TWL-RTC\n");
- ret = twl_rtc_write_u8(BIT_RTC_CTRL_REG_STOP_RTC_M, REG_RTC_CTRL_REG);
+ ret = twl_rtc_write_u8(twl_rtc, BIT_RTC_CTRL_REG_STOP_RTC_M,
+ REG_RTC_CTRL_REG);
if (ret < 0)
- goto out1;
+ return ret;
/* ensure interrupts are disabled, bootloaders can be strange */
- ret = twl_rtc_write_u8(0, REG_RTC_INTERRUPTS_REG);
+ ret = twl_rtc_write_u8(twl_rtc, 0, REG_RTC_INTERRUPTS_REG);
if (ret < 0)
dev_warn(&pdev->dev, "unable to disable interrupt\n");
/* init cached IRQ enable bits */
- ret = twl_rtc_read_u8(&rtc_irq_bits, REG_RTC_INTERRUPTS_REG);
+ ret = twl_rtc_read_u8(twl_rtc, &twl_rtc->rtc_irq_bits,
+ REG_RTC_INTERRUPTS_REG);
if (ret < 0)
- goto out1;
-
- rtc = rtc_device_register(pdev->name,
- &pdev->dev, &twl_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtc)) {
- ret = PTR_ERR(rtc);
- dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
- PTR_ERR(rtc));
- goto out1;
- }
+ return ret;
+
+ platform_set_drvdata(pdev, twl_rtc);
+ device_init_wakeup(&pdev->dev, true);
- ret = request_threaded_irq(irq, NULL, twl_rtc_interrupt,
- IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- dev_name(&rtc->dev), rtc);
+ twl_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &twl_rtc_ops, THIS_MODULE);
+ if (IS_ERR(twl_rtc->rtc))
+ return PTR_ERR(twl_rtc->rtc);
+
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ twl_rtc_interrupt,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ dev_name(&twl_rtc->rtc->dev), twl_rtc);
if (ret < 0) {
dev_err(&pdev->dev, "IRQ is not free.\n");
- goto out2;
+ return ret;
}
- platform_set_drvdata(pdev, rtc);
- device_init_wakeup(&pdev->dev, 1);
- return 0;
+ memset(&nvmem_cfg, 0, sizeof(nvmem_cfg));
+ nvmem_cfg.name = "twl-secured-";
+ nvmem_cfg.type = NVMEM_TYPE_BATTERY_BACKED;
+ nvmem_cfg.reg_read = twl_nvram_read;
+ nvmem_cfg.reg_write = twl_nvram_write;
+ nvmem_cfg.word_size = 1;
+ nvmem_cfg.stride = 1;
+ if (twl_class_is_4030()) {
+ /* 20 bytes SECURED_REG area */
+ nvmem_cfg.size = 20;
+ nvmem_cfg.priv = (void *)TWL_MODULE_SECURED_REG;
+ devm_rtc_nvmem_register(twl_rtc->rtc, &nvmem_cfg);
+ /* 8 bytes BACKUP area */
+ nvmem_cfg.name = "twl-backup-";
+ nvmem_cfg.size = 8;
+ nvmem_cfg.priv = (void *)TWL4030_MODULE_BACKUP;
+ devm_rtc_nvmem_register(twl_rtc->rtc, &nvmem_cfg);
+ } else {
+ /* 8 bytes SECURED_REG area */
+ nvmem_cfg.size = 8;
+ nvmem_cfg.priv = (void *)TWL_MODULE_SECURED_REG;
+ devm_rtc_nvmem_register(twl_rtc->rtc, &nvmem_cfg);
+ }
-out2:
- rtc_device_unregister(rtc);
-out1:
- return ret;
+ return 0;
}
/*
* Disable all TWL RTC module interrupts.
* Sets status flag to free.
*/
-static int twl_rtc_remove(struct platform_device *pdev)
+static void twl_rtc_remove(struct platform_device *pdev)
{
- /* leave rtc running, but disable irqs */
- struct rtc_device *rtc = platform_get_drvdata(pdev);
- int irq = platform_get_irq(pdev, 0);
+ struct twl_rtc *twl_rtc = platform_get_drvdata(pdev);
- mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
- mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
- if (twl_class_is_6030()) {
+ /* leave rtc running, but disable irqs */
+ mask_rtc_irq_bit(twl_rtc, BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ mask_rtc_irq_bit(twl_rtc, BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+ if (twl_rtc->class == TWL_6030) {
twl6030_interrupt_mask(TWL6030_RTC_INT_MASK,
REG_INT_MSK_LINE_A);
twl6030_interrupt_mask(TWL6030_RTC_INT_MASK,
REG_INT_MSK_STS_A);
}
-
-
- free_irq(irq, rtc);
-
- rtc_device_unregister(rtc);
- return 0;
}
static void twl_rtc_shutdown(struct platform_device *pdev)
{
+ struct twl_rtc *twl_rtc = platform_get_drvdata(pdev);
+
/* mask timer interrupts, but leave alarm interrupts on to enable
power-on when alarm is triggered */
- mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+ mask_rtc_irq_bit(twl_rtc, BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
}
#ifdef CONFIG_PM_SLEEP
-static unsigned char irqstat;
-
static int twl_rtc_suspend(struct device *dev)
{
- irqstat = rtc_irq_bits;
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
+
+ twl_rtc->irqstat = twl_rtc->rtc_irq_bits;
- mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+ mask_rtc_irq_bit(twl_rtc, BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
return 0;
}
static int twl_rtc_resume(struct device *dev)
{
- set_rtc_irq_bit(irqstat);
+ struct twl_rtc *twl_rtc = dev_get_drvdata(dev);
+
+ set_rtc_irq_bit(twl_rtc, twl_rtc->irqstat);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(twl_rtc_pm_ops, twl_rtc_suspend, twl_rtc_resume);
-#ifdef CONFIG_OF
static const struct of_device_id twl_rtc_of_match[] = {
{.compatible = "ti,twl4030-rtc", },
{ },
};
MODULE_DEVICE_TABLE(of, twl_rtc_of_match);
-#endif
-
-MODULE_ALIAS("platform:twl_rtc");
static struct platform_driver twl4030rtc_driver = {
.probe = twl_rtc_probe,
.remove = twl_rtc_remove,
.shutdown = twl_rtc_shutdown,
.driver = {
- .owner = THIS_MODULE,
.name = "twl_rtc",
.pm = &twl_rtc_pm_ops,
- .of_match_table = of_match_ptr(twl_rtc_of_match),
+ .of_match_table = twl_rtc_of_match,
},
};
module_platform_driver(twl4030rtc_driver);
MODULE_AUTHOR("Texas Instruments, MontaVista Software");
+MODULE_DESCRIPTION("TI TWL4030/TWL5030/TWL6030/TPS659x0 RTC driver");
MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-21 21:12:38 +0000