pmdomain: starfive: Add JH7110 AON PMU support

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>
Link: https://lore.kernel.org/r/20230913-dude-imprecise-fc32622bc947@spud
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/MAINTAINERS b/MAINTAINERS
index 4d9e7d42412f0cc7ba76c2608880564478def888..f1c34484c9b23b740b5055b801ad92d8769e5b6a 100644 (file)
--- 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 547cd3b9df1148a9cc8dd976bd634bc4ec4e1566..2724bee7e85f29c7c033930398b0146f4e3be52c 100644 (file)
--- 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");