[GIT PULL 5/5] pmdomain: starfive: Add JH7110 AON PMU support

Conor Dooley
2023-09-13T13:56:29Z

From: Changhuang Liang <changhuang.liang@starfivetech.com>

Add AON PMU for StarFive JH7110 SoC. It can be used to turn on/off the
dphy rx/tx power switch.

Reviewed-by: Walker Chen <walker.chen@starfivetech.com>
Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
MAINTAINERS | 1 +
drivers/pmdomain/starfive/jh71xx-pmu.c | 57 +++++++++++++++++++++++---
2 files changed, 53 insertions(+), 5 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 4d9e7d42412f..f1c34484c9b2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20512,6 +20512,7 @@ F: drivers/usb/cdns3/cdns3-starfive.c

STARFIVE JH71XX PMU CONTROLLER DRIVER
M: Walker Chen <walker.chen@starfivetech.com>
+M: Changhuang Liang <changhuang.liang@starfivetech.com>
S: Supported
F: Documentation/devicetree/bindings/power/starfive*
F: drivers/pmdomain/starfive/jh71xx-pmu.c
diff --git a/drivers/pmdomain/starfive/jh71xx-pmu.c b/drivers/pmdomain/starfive/jh71xx-pmu.c
index 547cd3b9df11..2724bee7e85f 100644
--- a/drivers/pmdomain/starfive/jh71xx-pmu.c
+++ b/drivers/pmdomain/starfive/jh71xx-pmu.c
@@ -2,7 +2,7 @@
/*
* StarFive JH71XX PMU (Power Management Unit) Controller Driver
*
- * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ * Copyright (C) 2022-2023 StarFive Technology Co., Ltd.
*/

#include <linux/interrupt.h>
@@ -23,6 +23,9 @@
#define JH71XX_PMU_EVENT_STATUS 0x88
#define JH71XX_PMU_INT_STATUS 0x8C

+/* aon pmu register offset */
+#define JH71XX_AON_PMU_SWITCH 0x00
+
/* sw encourage cfg */
#define JH71XX_PMU_SW_ENCOURAGE_EN_LO 0x05
#define JH71XX_PMU_SW_ENCOURAGE_EN_HI 0x50
@@ -159,6 +162,26 @@ static int jh7110_pmu_set_state(struct jh71xx_pmu_dev *pmd, u32 mask, bool on)
return 0;
}

+static int jh7110_aon_pmu_set_state(struct jh71xx_pmu_dev *pmd, u32 mask, bool on)
+{
+ struct jh71xx_pmu *pmu = pmd->pmu;
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&pmu->lock, flags);
+ val = readl(pmu->base + JH71XX_AON_PMU_SWITCH);
+
+ if (on)
+ val |= mask;
+ else
+ val &= ~mask;
+
+ writel(val, pmu->base + JH71XX_AON_PMU_SWITCH);
+ spin_unlock_irqrestore(&pmu->lock, flags);
+
+ return 0;
+}
+
static int jh71xx_pmu_set_state(struct jh71xx_pmu_dev *pmd, u32 mask, bool on)
{
struct jh71xx_pmu *pmu = pmd->pmu;
@@ -316,10 +339,12 @@ static int jh71xx_pmu_probe(struct platform_device *pdev)
if (!match_data)
return -EINVAL;

- ret = match_data->pmu_parse_irq(pdev, pmu);
- if (ret) {
- dev_err(dev, "failed to parse irq\n");
- return ret;
+ if (match_data->pmu_parse_irq) {
+ ret = match_data->pmu_parse_irq(pdev, pmu);
+ if (ret) {
+ dev_err(dev, "failed to parse irq\n");
+ return ret;
+ }
}

pmu->genpd = devm_kcalloc(dev, match_data->num_domains,
@@ -393,10 +418,31 @@ static const struct jh71xx_pmu_match_data jh7110_pmu = {
.pmu_set_state = jh7110_pmu_set_state,
};

+static const struct jh71xx_domain_info jh7110_aon_power_domains[] = {
+ [JH7110_PD_DPHY_TX] = {
+ .name = "DPHY-TX",
+ .bit = 30,
+ },
+ [JH7110_PD_DPHY_RX] = {
+ .name = "DPHY-RX",
+ .bit = 31,
+ },
+};
+
+static const struct jh71xx_pmu_match_data jh7110_aon_pmu = {
+ .num_domains = ARRAY_SIZE(jh7110_aon_power_domains),
+ .domain_info = jh7110_aon_power_domains,
+ .pmu_status = JH71XX_AON_PMU_SWITCH,
+ .pmu_set_state = jh7110_aon_pmu_set_state,
+};
+
static const struct of_device_id jh71xx_pmu_of_match[] = {
{
.compatible = "starfive,jh7110-pmu",
.data = (void *)&jh7110_pmu,
+ }, {
+ .compatible = "starfive,jh7110-aon-syscon",
+ .data = (void *)&jh7110_aon_pmu,
}, {
/* sentinel */
}
@@ -413,5 +459,6 @@ static struct platform_driver jh71xx_pmu_driver = {
builtin_platform_driver(jh71xx_pmu_driver);

MODULE_AUTHOR("Walker Chen <walker.chen@starfivetech.com>");
+MODULE_AUTHOR("Changhuang Liang <changhuang.liang@starfivetech.com>");
MODULE_DESCRIPTION("StarFive JH71XX PMU Driver");
MODULE_LICENSE("GPL");
--
2.39.2