diff options
Diffstat (limited to 'drivers/rtc/rtc-pcf85063.c')
| -rw-r--r-- | drivers/rtc/rtc-pcf85063.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index 2131c55316f6..ba4e75fbf258 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -5,6 +5,9 @@ * * Author: Søren Andersen <san@rosetechnology.dk> * Maintainers: http://www.nslu2-linux.org/ + * + * Copyright (C) 2019 Micro Crystal AG + * Author: Alexandre Belloni <alexandre.belloni@bootlin.com> */ #include <linux/i2c.h> #include <linux/bcd.h> @@ -22,7 +25,10 @@ * * PCF85063A -- Rev. 6 — 18 November 2015 * PCF85063TP -- Rev. 4 — 6 May 2015 -*/ + * + * https://www.microcrystal.com/fileadmin/Media/Products/RTC/App.Manual/RV-8263-C7_App-Manual.pdf + * RV8263 -- Rev. 1.0 — January 2019 + */ #define PCF85063_REG_CTRL1 0x00 /* status */ #define PCF85063_REG_CTRL1_CAP_SEL BIT(0) @@ -41,6 +47,7 @@ struct pcf85063_config { struct regmap_config regmap; unsigned has_alarms:1; + unsigned force_cap_7000:1; }; struct pcf85063 { @@ -230,12 +237,17 @@ static const struct rtc_class_ops pcf85063_rtc_ops_alarm = { }; static int pcf85063_load_capacitance(struct pcf85063 *pcf85063, - const struct device_node *np) + const struct device_node *np, + unsigned int force_cap) { u32 load = 7000; u8 reg = 0; - of_property_read_u32(np, "quartz-load-femtofarads", &load); + if (force_cap) + load = force_cap; + else + of_property_read_u32(np, "quartz-load-femtofarads", &load); + switch (load) { default: dev_warn(&pcf85063->rtc->dev, "Unknown quartz-load-femtofarads value: %d. Assuming 7000", @@ -269,6 +281,16 @@ static const struct pcf85063_config pcf85063tp_config = { }, }; +static const struct pcf85063_config rv8263_config = { + .regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x11, + }, + .has_alarms = 1, + .force_cap_7000 = 1, +}; + static int pcf85063_probe(struct i2c_client *client) { struct pcf85063 *pcf85063; @@ -303,7 +325,8 @@ static int pcf85063_probe(struct i2c_client *client) if (IS_ERR(pcf85063->rtc)) return PTR_ERR(pcf85063->rtc); - err = pcf85063_load_capacitance(pcf85063, client->dev.of_node); + err = pcf85063_load_capacitance(pcf85063, client->dev.of_node, + config->force_cap_7000 ? 7000 : 0); if (err < 0) dev_warn(&client->dev, "failed to set xtal load capacitance: %d", err); @@ -339,6 +362,7 @@ static const struct of_device_id pcf85063_of_match[] = { { .compatible = "nxp,pcf85063", .data = &pcf85063tp_config }, { .compatible = "nxp,pcf85063tp", .data = &pcf85063tp_config }, { .compatible = "nxp,pcf85063a", .data = &pcf85063a_config }, + { .compatible = "microcrystal,rv8263", .data = &rv8263_config }, {} }; MODULE_DEVICE_TABLE(of, pcf85063_of_match); |