// SPDX-License-Identifier: GPL-2.0
/*
* Driver for Sophgo CV1800 series SoC RTC subsystem
*
* The RTC module comprises a 32 kHz oscillator , Power - on - Reset ( PoR ) sub - module ,
* HW state machine to control chip power - on , power - off and reset . Furthermore ,
* the 8051 subsystem is located within RTCSYS including associated SRAM block .
*
* Copyright ( C ) 2025 Alexander Sverdlin < alexander . sverdlin @ gmail . com >
*
*/
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/property.h>
static struct resource cv1800_rtcsys_irq_resources[] = {
DEFINE_RES_IRQ_NAMED(0 , "alarm" ),
};
static const struct mfd_cell cv1800_rtcsys_subdev[] = {
{
.name = "cv1800b-rtc" ,
.num_resources = 1 ,
.resources = &cv1800_rtcsys_irq_resources[0 ],
},
};
static int cv1800_rtcsys_probe(struct platform_device *pdev)
{
int irq;
irq = platform_get_irq_byname(pdev, "alarm" );
if (irq < 0 )
return irq;
cv1800_rtcsys_irq_resources[0 ].start = irq;
cv1800_rtcsys_irq_resources[0 ].end = irq;
return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
cv1800_rtcsys_subdev,
ARRAY_SIZE(cv1800_rtcsys_subdev),
NULL, 0 , NULL);
}
static const struct of_device_id cv1800_rtcsys_of_match[] = {
{ .compatible = "sophgo,cv1800b-rtc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, cv1800_rtcsys_of_match);
static struct platform_driver cv1800_rtcsys_mfd = {
.probe = cv1800_rtcsys_probe,
.driver = {
.name = "cv1800_rtcsys" ,
.of_match_table = cv1800_rtcsys_of_match,
},
};
module_platform_driver(cv1800_rtcsys_mfd);
MODULE_AUTHOR("Alexander Sverdlin <alexander.sverdlin@gmail.com>" );
MODULE_DESCRIPTION("Sophgo CV1800 series SoC RTC subsystem driver" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=90 H=87 G=88
¤ Dauer der Verarbeitung: 0.3 Sekunden
¤
*© Formatika GbR, Deutschland