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Message-Id: <20240422205053.496095-3-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Mon, 22 Apr 2024 21:50:53 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
Thomas Gleixner <tglx@...utronix.de>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Magnus Damm <magnus.damm@...il.com>
Cc: linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
Prabhakar <prabhakar.csengg@...il.com>,
Biju Das <biju.das.jz@...renesas.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v3 2/2] irqchip/renesas-rzg2l: Add support for RZ/Five SoC
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
The IX45 block on the RZ/Five SoC has additional mask registers
(NMSK/IMSK/TMSK) compared to the RZ/G2L (family) SoC.
A new rzfive_irqc_chip irq_chip is introduced for RZ/Five, where function
pointers for irq_(un)mask and irq_(dis/en)able handle the (un)masking
of the interrupts. The irq_chip pointer is now passed as an init callback
and stored in the priv pointer to differentiate between RZ/G2L and RZ/Five.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
v2->v3
- Added RZ/Five specific irqchip instead of polluting the functions
- Fixed review comments pointed by Biju and Geert
- Updated commit message
- moved locking respective read/write functions
v1->v2
- Added IRQCHIP_MATCH() for RZ/Five
- Retaining a copy of OF data in priv
- Rebased the changes
---
drivers/irqchip/irq-renesas-rzg2l.c | 150 +++++++++++++++++++++++++++-
1 file changed, 147 insertions(+), 3 deletions(-)
diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq-renesas-rzg2l.c
index f6484bf15e0b..8c454b8eb5ad 100644
--- a/drivers/irqchip/irq-renesas-rzg2l.c
+++ b/drivers/irqchip/irq-renesas-rzg2l.c
@@ -37,6 +37,8 @@
#define TSSEL_SHIFT(n) (8 * (n))
#define TSSEL_MASK GENMASK(7, 0)
#define IRQ_MASK 0x3
+#define IMSK 0x10010
+#define TMSK 0x10020
#define TSSR_OFFSET(n) ((n) % 4)
#define TSSR_INDEX(n) ((n) / 4)
@@ -69,12 +71,14 @@ struct rzg2l_irqc_reg_cache {
/**
* struct rzg2l_irqc_priv - IRQ controller private data structure
* @base: Controller's base address
+ * @irqchip: Pointer to struct irq_chip
* @fwspec: IRQ firmware specific data
* @lock: Lock to serialize access to hardware registers
* @cache: Registers cache for suspend/resume
*/
static struct rzg2l_irqc_priv {
void __iomem *base;
+ const struct irq_chip *irqchip;
struct irq_fwspec fwspec[IRQC_NUM_IRQ];
raw_spinlock_t lock;
struct rzg2l_irqc_reg_cache cache;
@@ -138,6 +142,113 @@ static void rzg2l_irqc_eoi(struct irq_data *d)
irq_chip_eoi_parent(d);
}
+static void rzfive_irqc_mask_irq_interrupt(struct rzg2l_irqc_priv *priv,
+ unsigned int hwirq)
+{
+ u32 bit = BIT(hwirq - IRQC_IRQ_START);
+
+ raw_spin_lock(&priv->lock);
+ writel_relaxed(readl_relaxed(priv->base + IMSK) | bit, priv->base + IMSK);
+ raw_spin_unlock(&priv->lock);
+}
+
+static void rzfive_irqc_unmask_irq_interrupt(struct rzg2l_irqc_priv *priv,
+ unsigned int hwirq)
+{
+ u32 bit = BIT(hwirq - IRQC_IRQ_START);
+
+ raw_spin_lock(&priv->lock);
+ writel_relaxed(readl_relaxed(priv->base + IMSK) & ~bit, priv->base + IMSK);
+ raw_spin_unlock(&priv->lock);
+}
+
+static void rzfive_irqc_mask_tint_interrupt(struct rzg2l_irqc_priv *priv,
+ unsigned int hwirq)
+{
+ u32 bit = BIT(hwirq - IRQC_TINT_START);
+
+ raw_spin_lock(&priv->lock);
+ writel_relaxed(readl_relaxed(priv->base + TMSK) | bit, priv->base + TMSK);
+ raw_spin_unlock(&priv->lock);
+}
+
+static void rzfive_irqc_unmask_tint_interrupt(struct rzg2l_irqc_priv *priv,
+ unsigned int hwirq)
+{
+ u32 bit = BIT(hwirq - IRQC_TINT_START);
+
+ raw_spin_lock(&priv->lock);
+ writel_relaxed(readl_relaxed(priv->base + TMSK) & ~bit, priv->base + TMSK);
+ raw_spin_unlock(&priv->lock);
+}
+
+static void rzfive_irqc_mask(struct irq_data *d)
+{
+ struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
+ unsigned int hwirq = irqd_to_hwirq(d);
+
+ if (hwirq >= IRQC_IRQ_START && hwirq <= IRQC_IRQ_COUNT)
+ rzfive_irqc_mask_irq_interrupt(priv, hwirq);
+ else if (hwirq >= IRQC_TINT_START && hwirq < IRQC_NUM_IRQ)
+ rzfive_irqc_mask_tint_interrupt(priv, hwirq);
+ irq_chip_mask_parent(d);
+}
+
+static void rzfive_irqc_unmask(struct irq_data *d)
+{
+ struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
+ unsigned int hwirq = irqd_to_hwirq(d);
+
+ if (hwirq >= IRQC_IRQ_START && hwirq <= IRQC_IRQ_COUNT)
+ rzfive_irqc_unmask_irq_interrupt(priv, hwirq);
+ else if (hwirq >= IRQC_TINT_START && hwirq < IRQC_NUM_IRQ)
+ rzfive_irqc_unmask_tint_interrupt(priv, hwirq);
+ irq_chip_unmask_parent(d);
+}
+
+static void rzfive_tint_irq_endisable(struct irq_data *d, bool enable)
+{
+ struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
+ unsigned int hwirq = irqd_to_hwirq(d);
+
+ if (hwirq >= IRQC_TINT_START && hwirq < IRQC_NUM_IRQ) {
+ u32 offset = hwirq - IRQC_TINT_START;
+ u32 tssr_offset = TSSR_OFFSET(offset);
+ u8 tssr_index = TSSR_INDEX(offset);
+ u32 reg;
+
+ if (enable)
+ rzfive_irqc_unmask_tint_interrupt(priv, hwirq);
+ else
+ rzfive_irqc_mask_tint_interrupt(priv, hwirq);
+ raw_spin_lock(&priv->lock);
+ reg = readl_relaxed(priv->base + TSSR(tssr_index));
+ if (enable)
+ reg |= TIEN << TSSEL_SHIFT(tssr_offset);
+ else
+ reg &= ~(TIEN << TSSEL_SHIFT(tssr_offset));
+ writel_relaxed(reg, priv->base + TSSR(tssr_index));
+ raw_spin_unlock(&priv->lock);
+ } else {
+ if (enable)
+ rzfive_irqc_unmask_irq_interrupt(priv, hwirq);
+ else
+ rzfive_irqc_mask_irq_interrupt(priv, hwirq);
+ }
+}
+
+static void rzfive_irqc_irq_disable(struct irq_data *d)
+{
+ rzfive_tint_irq_endisable(d, false);
+ irq_chip_disable_parent(d);
+}
+
+static void rzfive_irqc_irq_enable(struct irq_data *d)
+{
+ rzfive_tint_irq_endisable(d, true);
+ irq_chip_enable_parent(d);
+}
+
static void rzg2l_tint_irq_endisable(struct irq_data *d, bool enable)
{
unsigned int hw_irq = irqd_to_hwirq(d);
@@ -321,7 +432,7 @@ static struct syscore_ops rzg2l_irqc_syscore_ops = {
.resume = rzg2l_irqc_irq_resume,
};
-static const struct irq_chip irqc_chip = {
+static const struct irq_chip rzg2l_irqc_chip = {
.name = "rzg2l-irqc",
.irq_eoi = rzg2l_irqc_eoi,
.irq_mask = irq_chip_mask_parent,
@@ -338,6 +449,23 @@ static const struct irq_chip irqc_chip = {
IRQCHIP_SKIP_SET_WAKE,
};
+static const struct irq_chip rzfive_irqc_chip = {
+ .name = "rzfive-irqc",
+ .irq_eoi = rzg2l_irqc_eoi,
+ .irq_mask = rzfive_irqc_mask,
+ .irq_unmask = rzfive_irqc_unmask,
+ .irq_disable = rzfive_irqc_irq_disable,
+ .irq_enable = rzfive_irqc_irq_enable,
+ .irq_get_irqchip_state = irq_chip_get_parent_state,
+ .irq_set_irqchip_state = irq_chip_set_parent_state,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_type = rzg2l_irqc_set_type,
+ .irq_set_affinity = irq_chip_set_affinity_parent,
+ .flags = IRQCHIP_MASK_ON_SUSPEND |
+ IRQCHIP_SET_TYPE_MASKED |
+ IRQCHIP_SKIP_SET_WAKE,
+};
+
static int rzg2l_irqc_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg)
{
@@ -369,7 +497,7 @@ static int rzg2l_irqc_alloc(struct irq_domain *domain, unsigned int virq,
if (hwirq > (IRQC_NUM_IRQ - 1))
return -EINVAL;
- ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &irqc_chip,
+ ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, priv->irqchip,
(void *)(uintptr_t)tint);
if (ret)
return ret;
@@ -401,7 +529,8 @@ static int rzg2l_irqc_parse_interrupts(struct rzg2l_irqc_priv *priv,
return 0;
}
-static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent)
+static int rzg2l_irqc_init_helper(struct device_node *node, struct device_node *parent,
+ const struct irq_chip *irq_chip)
{
struct irq_domain *irq_domain, *parent_domain;
struct platform_device *pdev;
@@ -422,6 +551,8 @@ static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent)
if (!rzg2l_irqc_data)
return -ENOMEM;
+ rzg2l_irqc_data->irqchip = irq_chip;
+
rzg2l_irqc_data->base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
if (IS_ERR(rzg2l_irqc_data->base))
return PTR_ERR(rzg2l_irqc_data->base);
@@ -472,8 +603,21 @@ static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent)
return ret;
}
+static int __init rzg2l_irqc_init(struct device_node *node,
+ struct device_node *parent)
+{
+ return rzg2l_irqc_init_helper(node, parent, &rzg2l_irqc_chip);
+}
+
+static int __init rzfive_irqc_init(struct device_node *node,
+ struct device_node *parent)
+{
+ return rzg2l_irqc_init_helper(node, parent, &rzfive_irqc_chip);
+}
+
IRQCHIP_PLATFORM_DRIVER_BEGIN(rzg2l_irqc)
IRQCHIP_MATCH("renesas,rzg2l-irqc", rzg2l_irqc_init)
+IRQCHIP_MATCH("renesas,r9a07g043f-irqc", rzfive_irqc_init)
IRQCHIP_PLATFORM_DRIVER_END(rzg2l_irqc)
MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>");
MODULE_DESCRIPTION("Renesas RZ/G2L IRQC Driver");
--
2.34.1
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