[PATCH 6.1.y-cip 10/13] rtc: isl1208: Add support for the built-in RTC on the PMIC RAA215300

Biju Das
2023-08-16T14:25:29Z

commit fdd63f65ac25d0851dade4c7ba94a7a882b8d9c2 upstream.

The built-in RTC found on PMIC RAA215300 is the same as ISL1208.
However, the external oscillator bit is inverted on PMIC version
0x11. The PMIC driver detects PMIC version and instantiates the
RTC device based on i2c_device_id.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230623140948.384762-11-biju.das.jz@bp.renesas.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
drivers/rtc/rtc-isl1208.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index 915f23668228..b8cb99810ce4 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -74,6 +74,7 @@ struct isl1208_config {
unsigned int nvmem_length;
unsigned has_tamper:1;
unsigned has_timestamp:1;
+ unsigned has_inverted_osc_bit:1;
};

static const struct isl1208_config config_isl1208 = {
@@ -100,11 +101,19 @@ static const struct isl1208_config config_isl1219 = {
.has_timestamp = true
};

+static const struct isl1208_config config_raa215300_a0 = {
+ .nvmem_length = 2,
+ .has_tamper = false,
+ .has_timestamp = false,
+ .has_inverted_osc_bit = true
+};
+
static const struct i2c_device_id isl1208_id[] = {
{ "isl1208", .driver_data = (kernel_ulong_t)&config_isl1208 },
{ "isl1209", .driver_data = (kernel_ulong_t)&config_isl1209 },
{ "isl1218", .driver_data = (kernel_ulong_t)&config_isl1218 },
{ "isl1219", .driver_data = (kernel_ulong_t)&config_isl1219 },
+ { "raa215300_a0", .driver_data = (kernel_ulong_t)&config_raa215300_a0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, isl1208_id);
@@ -893,6 +902,9 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
return sr;
}

+ if (isl1208->config->has_inverted_osc_bit)
+ xtosb_val = !xtosb_val;
+
rc = isl1208_set_xtoscb(client, sr, xtosb_val);
if (rc)
return rc;
--
2.25.1