kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

rtc: s5m: Remove unused watchdog and sudden momentary power loss

Browse source 
The WTSR (Watchdog Timer Software Reset) and SMPL (Sudden Momentary
Power Loss) are never enabled. These are left-overs from board files.
After removing them the driver's shutdown callback is empty so get rid
of it as well.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Krzysztof Kozlowski 2015-02-06 12:24:47 +01:00 committed by Lee Jones
parent 0523b8f414
commit 2600abca14
1 changed files with 0 additions and 60 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

60
drivers/rtc/rtc-s5m.c
View file

@ -48,8 +48,6 @@ struct s5m_rtc_reg_config {
unsigned int alarm0;
/* First register for alarm 1, seconds */
unsigned int alarm1;
/* SMPL/WTSR register */
unsigned int smpl_wtsr;
/*
* Register for update flag (UDR). Typically setting UDR field to 1
* will enable update of time or alarm register. Then it will be
@ -67,7 +65,6 @@ static const struct s5m_rtc_reg_config s5m_rtc_regs = {
.ctrl = S5M_ALARM1_CONF,
.alarm0 = S5M_ALARM0_SEC,
.alarm1 = S5M_ALARM1_SEC,
.smpl_wtsr = S5M_WTSR_SMPL_CNTL,
.rtc_udr_update = S5M_RTC_UDR_CON,
.rtc_udr_mask = S5M_RTC_UDR_MASK,
};
@ -82,7 +79,6 @@ static const struct s5m_rtc_reg_config s2mps_rtc_regs = {
.ctrl = S2MPS_RTC_CTRL,
.alarm0 = S2MPS_ALARM0_SEC,
.alarm1 = S2MPS_ALARM1_SEC,
.smpl_wtsr = S2MPS_WTSR_SMPL_CNTL,
.rtc_udr_update = S2MPS_RTC_UDR_CON,
.rtc_udr_mask = S2MPS_RTC_WUDR_MASK,
};
@ -96,7 +92,6 @@ struct s5m_rtc_info {
int irq;
int device_type;
int rtc_24hr_mode;
bool wtsr_smpl;
const struct s5m_rtc_reg_config *regs;
};
@ -597,28 +592,6 @@ static const struct rtc_class_ops s5m_rtc_ops = {
.alarm_irq_enable = s5m_rtc_alarm_irq_enable,
};
static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable)
{
int ret;
ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr,
WTSR_ENABLE_MASK,
enable ? WTSR_ENABLE_MASK : 0);
if (ret < 0)
dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
__func__, ret);
}
static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
{
int ret;
ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr,
SMPL_ENABLE_MASK,
enable ? SMPL_ENABLE_MASK : 0);
if (ret < 0)
dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
__func__, ret);
}
static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
{
u8 data[2];
@ -715,7 +688,6 @@ static int s5m_rtc_probe(struct platform_device *pdev)
info->dev = &pdev->dev;
info->s5m87xx = s5m87xx;
info->device_type = s5m87xx->device_type;
info->wtsr_smpl = s5m87xx->wtsr_smpl;
if (s5m87xx->irq_data) {
info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq);
@ -731,11 +703,6 @@ static int s5m_rtc_probe(struct platform_device *pdev)
ret = s5m8767_rtc_init_reg(info);
if (info->wtsr_smpl) {
s5m_rtc_enable_wtsr(info, true);
s5m_rtc_enable_smpl(info, true);
}
device_init_wakeup(&pdev->dev, 1);
info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
@ -768,36 +735,10 @@ err:
return ret;
}
static void s5m_rtc_shutdown(struct platform_device *pdev)
{
struct s5m_rtc_info *info = platform_get_drvdata(pdev);
int i;
unsigned int val = 0;
if (info->wtsr_smpl) {
for (i = 0; i < 3; i++) {
s5m_rtc_enable_wtsr(info, false);
regmap_read(info->regmap, info->regs->smpl_wtsr, &val);
pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
if (val & WTSR_ENABLE_MASK)
pr_emerg("%s: fail to disable WTSR\n",
__func__);
else {
pr_info("%s: success to disable WTSR\n",
__func__);
break;
}
}
}
/* Disable SMPL when power off */
s5m_rtc_enable_smpl(info, false);
}
static int s5m_rtc_remove(struct platform_device *pdev)
{
struct s5m_rtc_info *info = platform_get_drvdata(pdev);
/* Perform also all shutdown steps when removing */
s5m_rtc_shutdown(pdev);
i2c_unregister_device(info->i2c);
return 0;
@ -842,7 +783,6 @@ static struct platform_driver s5m_rtc_driver = {
},
.probe = s5m_rtc_probe,
.remove = s5m_rtc_remove,
.shutdown = s5m_rtc_shutdown,
.id_table = s5m_rtc_id,
};