From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: linux-rtc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Subject: [PATCH 05/16] rtc: rv3029: avoid reading the status register uselessly
Date: Sat, 14 Dec 2019 23:10:11 +0100 [thread overview]
Message-ID: <20191214221022.622482-6-alexandre.belloni@bootlin.com> (raw)
In-Reply-To: <20191214221022.622482-1-alexandre.belloni@bootlin.com>
RV3029_STATUS is read in multiple location but its value is never used
afterwards. Avoid this register access when not necessary.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/rtc/rtc-rv3029c2.c | 26 --------------------------
1 file changed, 26 deletions(-)
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index 4e7514433b79..0e0a10cbfd67 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -333,16 +333,9 @@ static irqreturn_t rv3029_handle_irq(int irq, void *dev_id)
static int rv3029_read_time(struct device *dev, struct rtc_time *tm)
{
- u8 buf[1];
int ret;
u8 regs[RV3029_WATCH_SECTION_LEN] = { 0, };
- ret = rv3029_get_sr(dev, buf);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return -EIO;
- }
-
ret = rv3029_read_regs(dev, RV3029_W_SEC, regs,
RV3029_WATCH_SECTION_LEN);
if (ret < 0) {
@@ -380,12 +373,6 @@ static int rv3029_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
int ret;
u8 regs[8], controls, flags;
- ret = rv3029_get_sr(dev, regs);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return -EIO;
- }
-
ret = rv3029_read_regs(dev, RV3029_A_SC, regs,
RV3029_ALARM_SECTION_LEN);
@@ -459,12 +446,6 @@ static int rv3029_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
if (tm->tm_year < 100)
return -EINVAL;
- ret = rv3029_get_sr(dev, regs);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return -EIO;
- }
-
/* Activate all the alarms with AE_x bit */
regs[RV3029_A_SC - RV3029_A_SC] = bin2bcd(tm->tm_sec) | RV3029_A_AE_X;
regs[RV3029_A_MN - RV3029_A_SC] = bin2bcd(tm->tm_min) | RV3029_A_AE_X;
@@ -748,7 +729,6 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq,
{
struct rv3029_data *rv3029;
int rc = 0;
- u8 buf[1];
rv3029 = devm_kzalloc(dev, sizeof(*rv3029), GFP_KERNEL);
if (!rv3029)
@@ -759,12 +739,6 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq,
rv3029->dev = dev;
dev_set_drvdata(dev, rv3029);
- rc = rv3029_get_sr(dev, buf);
- if (rc < 0) {
- dev_err(dev, "reading status failed\n");
- return rc;
- }
-
rv3029_trickle_config(dev);
rv3029_hwmon_register(dev, name);
--
2.23.0
next prev parent reply other threads:[~2019-12-14 22:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-14 22:10 [PATCH 00/16] rtc: rv3029: cleanup and features Alexandre Belloni
2019-12-14 22:10 ` [PATCH 01/16] rtc: rv3029: use proper name for the driver Alexandre Belloni
2019-12-14 22:10 ` [PATCH 02/16] rtc: rv3029: let regmap validate the register ranges Alexandre Belloni
2019-12-14 22:10 ` [PATCH 03/16] rtc: rv3029: remove open coded regmap_update_bits Alexandre Belloni
2019-12-14 22:10 ` [PATCH 04/16] rtc: rv3029: remove race condition when update STATUS Alexandre Belloni
2019-12-14 22:10 ` Alexandre Belloni [this message]
2019-12-14 22:10 ` [PATCH 06/16] rtc: rv3029: get rid of rv3029_get_sr Alexandre Belloni
2019-12-14 22:10 ` [PATCH 07/16] rtc: rv3029: simplify rv3029_alarm_irq_enable Alexandre Belloni
2019-12-14 22:10 ` [PATCH 08/16] rtc: rv3029: simplify rv3029_set_alarm Alexandre Belloni
2019-12-14 22:10 ` [PATCH 09/16] rtc: rv3029: drop rv3029_read_regs and rv3029_write_regs Alexandre Belloni
2019-12-14 22:10 ` [PATCH 10/16] rtc: rv3029: add RTC_VL_READ and RTC_VL_CLEAR support Alexandre Belloni
2019-12-14 22:10 ` [PATCH 11/16] rtc: rv3029: correctly handle PON and VLOW2 Alexandre Belloni
2019-12-14 22:10 ` [PATCH 12/16] rtc: rv3029: convert to devm_rtc_allocate_device Alexandre Belloni
2019-12-14 22:10 ` [PATCH 13/16] rtc: rv3029: let the core handle rtc range Alexandre Belloni
2019-12-14 22:10 ` [PATCH 14/16] rtc: rv3029: remove useless error messages Alexandre Belloni
2019-12-14 22:10 ` [PATCH 15/16] rtc: rv3029: annotate init and exit functions Alexandre Belloni
2019-12-14 22:10 ` [PATCH 16/16] rtc: rv3029: add nvram support Alexandre Belloni
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