Compared to the other supported chips, the m41t62 uses a different
register to set the square wave frequency.
Signed-off-by: Daniel Glöckner <[email protected]>
---
drivers/rtc/Kconfig | 4 ++--
drivers/rtc/rtc-m41t80.c | 18 +++++++++++++-----
2 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 81450fb..1a9af76 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -224,11 +224,11 @@ config RTC_DRV_PCF8583
will be called rtc-pcf8583.
config RTC_DRV_M41T80
- tristate "ST M41T65/M41T80/81/82/83/84/85/87"
+ tristate "ST M41T62/65/M41T80/81/82/83/84/85/87"
help
If you say Y here you will get support for the ST M41T60
and M41T80 RTC chips series. Currently, the following chips are
- supported: M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
+ supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
M41ST85, and M41ST87.
This driver can also be built as a module. If so, the module
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 893f7de..60fe266 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -64,10 +64,12 @@
#define M41T80_FEATURE_BL (1 << 1) /* Battery low indicator */
#define M41T80_FEATURE_SQ (1 << 2) /* Squarewave feature */
#define M41T80_FEATURE_WD (1 << 3) /* Extra watchdog resolution */
+#define M41T80_FEATURE_SQ_ALT (1 << 4) /* RSx bits are in reg 4 */
#define DRV_VERSION "0.05"
static const struct i2c_device_id m41t80_id[] = {
+ { "m41t62", M41T80_FEATURE_SQ | M41T80_FEATURE_SQ_ALT },
{ "m41t65", M41T80_FEATURE_HT | M41T80_FEATURE_WD },
{ "m41t80", M41T80_FEATURE_SQ },
{ "m41t81", M41T80_FEATURE_HT | M41T80_FEATURE_SQ},
@@ -393,12 +395,15 @@ static ssize_t m41t80_sysfs_show_sqwfreq(struct device *dev,
{
struct i2c_client *client = to_i2c_client(dev);
struct m41t80_data *clientdata = i2c_get_clientdata(client);
- int val;
+ int val, reg_sqw;
if (!(clientdata->features & M41T80_FEATURE_SQ))
return -EINVAL;
- val = i2c_smbus_read_byte_data(client, M41T80_REG_SQW);
+ reg_sqw = M41T80_REG_SQW;
+ if (clientdata->features & M41T80_FEATURE_SQ_ALT)
+ reg_sqw = M41T80_REG_WDAY;
+ val = i2c_smbus_read_byte_data(client, reg_sqw);
if (val < 0)
return -EIO;
val = (val >> 4) & 0xf;
@@ -419,7 +424,7 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev,
{
struct i2c_client *client = to_i2c_client(dev);
struct m41t80_data *clientdata = i2c_get_clientdata(client);
- int almon, sqw;
+ int almon, sqw, reg_sqw;
int val = simple_strtoul(buf, NULL, 0);
if (!(clientdata->features & M41T80_FEATURE_SQ))
@@ -440,13 +445,16 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev,
almon = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON);
if (almon < 0)
return -EIO;
- sqw = i2c_smbus_read_byte_data(client, M41T80_REG_SQW);
+ reg_sqw = M41T80_REG_SQW;
+ if (clientdata->features & M41T80_FEATURE_SQ_ALT)
+ reg_sqw = M41T80_REG_WDAY;
+ sqw = i2c_smbus_read_byte_data(client, reg_sqw);
if (sqw < 0)
return -EIO;
sqw = (sqw & 0x0f) | (val << 4);
if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON,
almon & ~M41T80_ALMON_SQWE) < 0 ||
- i2c_smbus_write_byte_data(client, M41T80_REG_SQW, sqw) < 0)
+ i2c_smbus_write_byte_data(client, reg_sqw, sqw) < 0)
return -EIO;
if (val && i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON,
almon | M41T80_ALMON_SQWE) < 0)
--
1.6.2.107.ge47ee
Signed-off-by: Daniel Glöckner <[email protected]>
---
arch/xtensa/platforms/s6105/device.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/xtensa/platforms/s6105/device.c b/arch/xtensa/platforms/s6105/device.c
index a55d054..bb59580 100644
--- a/arch/xtensa/platforms/s6105/device.c
+++ b/arch/xtensa/platforms/s6105/device.c
@@ -192,6 +192,9 @@ static struct i2c_board_info __initdata s6_i2c_devices[] = {
{
I2C_BOARD_INFO("24c02", S6I2C_ADDR_AT24HC02B),
},
+ {
+ I2C_BOARD_INFO("m41t62", S6I2C_ADDR_M41T62),
+ },
};
static struct resource s6_isef_resource[] = {
--
1.6.2.107.ge47ee
Signed-off-by: Daniel Glöckner <[email protected]>
---
arch/xtensa/configs/s6105_defconfig | 56 +++++++++++++++++++++++++++++++++--
1 files changed, 53 insertions(+), 3 deletions(-)
diff --git a/arch/xtensa/configs/s6105_defconfig b/arch/xtensa/configs/s6105_defconfig
index c5ea056..a386a01 100644
--- a/arch/xtensa/configs/s6105_defconfig
+++ b/arch/xtensa/configs/s6105_defconfig
@@ -363,8 +363,6 @@ CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
-# CONFIG_RTC is not set
-# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
@@ -529,7 +527,59 @@ CONFIG_MMC_SPI=y
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
-# CONFIG_RTC_CLASS is not set
+CONFIG_RTC_LIB=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
+# CONFIG_RTC_DEBUG is not set
+
+#
+# RTC interfaces
+#
+# CONFIG_RTC_INTF_SYSFS is not set
+# CONFIG_RTC_INTF_PROC is not set
+# CONFIG_RTC_INTF_DEV is not set
+# CONFIG_RTC_DRV_TEST is not set
+
+#
+# I2C RTC drivers
+#
+# CONFIG_RTC_DRV_DS1307 is not set
+# CONFIG_RTC_DRV_DS1374 is not set
+# CONFIG_RTC_DRV_DS1672 is not set
+# CONFIG_RTC_DRV_MAX6900 is not set
+# CONFIG_RTC_DRV_RS5C372 is not set
+# CONFIG_RTC_DRV_ISL1208 is not set
+# CONFIG_RTC_DRV_X1205 is not set
+# CONFIG_RTC_DRV_PCF8563 is not set
+# CONFIG_RTC_DRV_PCF8583 is not set
+CONFIG_RTC_DRV_M41T80=y
+# CONFIG_RTC_DRV_M41T80_WDT is not set
+# CONFIG_RTC_DRV_S35390A is not set
+# CONFIG_RTC_DRV_FM3130 is not set
+# CONFIG_RTC_DRV_RX8581 is not set
+
+#
+# SPI RTC drivers
+#
+
+#
+# Platform RTC drivers
+#
+# CONFIG_RTC_DRV_DS1286 is not set
+# CONFIG_RTC_DRV_DS1511 is not set
+# CONFIG_RTC_DRV_DS1553 is not set
+# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_STK17TA8 is not set
+# CONFIG_RTC_DRV_M48T86 is not set
+# CONFIG_RTC_DRV_M48T35 is not set
+# CONFIG_RTC_DRV_M48T59 is not set
+# CONFIG_RTC_DRV_BQ4802 is not set
+# CONFIG_RTC_DRV_V3020 is not set
+
+#
+# on-CPU RTC drivers
+#
# CONFIG_DMADEVICES is not set
# CONFIG_UIO is not set
# CONFIG_STAGING is not set
--
1.6.2.107.ge47ee