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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: bp.renesas.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: OS0PR01MB5922.jpnprd01.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6c03dd19-22ef-4eb9-b9d0-08da3383f19a X-MS-Exchange-CrossTenant-originalarrivaltime: 11 May 2022 19:25:01.3371 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 53d82571-da19-47e4-9cb4-625a166a4a2a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: +tf354TpReYa1tO5FSr05mEoNb9tW/5CveGsbeoJFA5TvLrC6zvMRCTjX7vSuZLUbTHlpd0nuF2vp2GR8PVIBEr02EjoOf8O7LBjGsErMIQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYCPR01MB8013 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Hi Prabhakar, > Subject: [PATCH v3 2/5] irqchip: Add RZ/G2L IA55 Interrupt Controller > driver >=20 > Add a driver for the Renesas RZ/G2L Interrupt Controller. >=20 > This supports external pins being used as interrupts. It supports one lin= e > for NMI, 8 external pins and 32 GPIO pins (out of 123) to be used as IRQ > lines. >=20 > Signed-off-by: Lad Prabhakar > --- > drivers/irqchip/Kconfig | 8 + > drivers/irqchip/Makefile | 1 + > drivers/irqchip/irq-renesas-rzg2l.c | 444 ++++++++++++++++++++++++++++ > 3 files changed, 453 insertions(+) > create mode 100644 drivers/irqchip/irq-renesas-rzg2l.c >=20 > diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index > 15edb9a6fcae..f3d071422f3b 100644 > --- a/drivers/irqchip/Kconfig > +++ b/drivers/irqchip/Kconfig > @@ -242,6 +242,14 @@ config RENESAS_RZA1_IRQC > Enable support for the Renesas RZ/A1 Interrupt Controller, to use > up > to 8 external interrupts with configurable sense select. >=20 > +config RENESAS_RZG2L_IRQC > + bool "Renesas RZ/G2L (and alike SoC) IRQC support" if COMPILE_TEST > + select GENERIC_IRQ_CHIP > + select IRQ_DOMAIN_HIERARCHY > + help > + Enable support for the Renesas RZ/G2L (and alike SoC) Interrupt > Controller > + for external devices. > + > config SL28CPLD_INTC > bool "Kontron sl28cpld IRQ controller" > depends on MFD_SL28CPLD=3Dy || COMPILE_TEST diff --git > a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index > 160a1d8ceaa9..eaa56eec2b23 100644 > --- a/drivers/irqchip/Makefile > +++ b/drivers/irqchip/Makefile > @@ -51,6 +51,7 @@ obj-$(CONFIG_RDA_INTC) +=3D irq-rda-intc.o > obj-$(CONFIG_RENESAS_INTC_IRQPIN) +=3D irq-renesas-intc-irqpin.o > obj-$(CONFIG_RENESAS_IRQC) +=3D irq-renesas-irqc.o > obj-$(CONFIG_RENESAS_RZA1_IRQC) +=3D irq-renesas-rza1.o > +obj-$(CONFIG_RENESAS_RZG2L_IRQC) +=3D irq-renesas-rzg2l.o > obj-$(CONFIG_VERSATILE_FPGA_IRQ) +=3D irq-versatile-fpga.o > obj-$(CONFIG_ARCH_NSPIRE) +=3D irq-zevio.o > obj-$(CONFIG_ARCH_VT8500) +=3D irq-vt8500.o > diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq- > renesas-rzg2l.c > new file mode 100644 > index 000000000000..61435d8dbe1a > --- /dev/null > +++ b/drivers/irqchip/irq-renesas-rzg2l.c > @@ -0,0 +1,444 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Renesas RZ/G2L IRQC Driver > + * > + * Copyright (C) 2022 Renesas Electronics Corporation. > + * > + * Author: Lad Prabhakar > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define IRQC_IRQ_START 1 > +#define IRQC_IRQ_COUNT 8 > +#define IRQC_TINT_START (IRQC_IRQ_START + IRQC_IRQ_COUNT) > +#define IRQC_TINT_COUNT 32 > +#define IRQC_NUM_IRQ (IRQC_TINT_START + IRQC_TINT_COUNT) > + > +#define ISCR 0x10 > +#define IITSR 0x14 > +#define TSCR 0x20 > +#define TITSR0 0x24 > +#define TITSR1 0x28 > +#define TITSR0_MAX_INT 16 > +#define TITSEL_WIDTH 0x2 > +#define TSSR(n) (0x30 + ((n) * 4)) > +#define TIEN BIT(7) > +#define TSSEL_SHIFT(n) (8 * (n)) > +#define TSSEL_MASK GENMASK(7, 0) > +#define IRQ_MASK 0x3 > + > +#define TSSR_OFFSET(n) ((n) % 4) > +#define TSSR_INDEX(n) ((n) / 4) > + > +#define TITSR_TITSEL_EDGE_RISING 0 > +#define TITSR_TITSEL_EDGE_FALLING 1 > +#define TITSR_TITSEL_LEVEL_HIGH 2 > +#define TITSR_TITSEL_LEVEL_LOW 3 > + > +#define IITSR_IITSEL(n, sense) ((sense) << ((n) * 2)) > +#define IITSR_IITSEL_LEVEL_LOW 0 > +#define IITSR_IITSEL_EDGE_FALLING 1 > +#define IITSR_IITSEL_EDGE_RISING 2 > +#define IITSR_IITSEL_EDGE_BOTH 3 > +#define IITSR_IITSEL_MASK(n) IITSR_IITSEL((n), 3) > + > +#define TINT_EXTRACT_HWIRQ(x) ((x) & ~GENMASK(31, 16)) > +#define TINT_EXTRACT_GPIOINT(x) ((x) >> 16) > + > +struct rzg2l_irqc_priv { > + void __iomem *base; > + struct of_phandle_args map[IRQC_NUM_IRQ]; > + raw_spinlock_t lock; > +}; > + > +struct rzg2l_irqc_chip_data { > + int tint; > +}; > + > +static struct rzg2l_irqc_priv *irq_data_to_priv(struct irq_data *data) > +{ > + return data->domain->host_data; > +} > + > +static void rzg2l_irq_eoi(struct irq_data *d) { > + unsigned int hw_irq =3D irqd_to_hwirq(d) - IRQC_IRQ_START; > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + u32 bit =3D BIT(hw_irq); > + u32 reg; > + > + reg =3D readl_relaxed(priv->base + ISCR); > + if (reg & bit) > + writel_relaxed(reg & ~bit, priv->base + ISCR); } > + > +static void rzg2l_tint_eoi(struct irq_data *d) { > + unsigned int hw_irq =3D irqd_to_hwirq(d) - IRQC_TINT_START; > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + u32 bit =3D BIT(hw_irq); > + u32 reg; > + > + reg =3D readl_relaxed(priv->base + TSCR); > + if (reg & bit) > + writel_relaxed(reg & ~bit, priv->base + TSCR); } > + > +static void rzg2l_irqc_eoi(struct irq_data *d) { > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + unsigned int hw_irq =3D irqd_to_hwirq(d); > + > + raw_spin_lock(&priv->lock); > + if (hw_irq >=3D IRQC_IRQ_START && hw_irq <=3D IRQC_IRQ_COUNT) > + rzg2l_irq_eoi(d); > + else if (hw_irq >=3D IRQC_TINT_START && hw_irq <=3D IRQC_TINT_COUNT) > + rzg2l_tint_eoi(d); > + raw_spin_unlock(&priv->lock); > + irq_chip_eoi_parent(d); > +} > + > +static void rzg2l_irqc_irq_disable(struct irq_data *d) { > + unsigned int hw_irq =3D irqd_to_hwirq(d); > + > + if (hw_irq >=3D IRQC_TINT_START && hw_irq <=3D IRQC_TINT_COUNT) { > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + u32 offset =3D hw_irq - IRQC_TINT_START; > + u32 tssr_offset =3D TSSR_OFFSET(offset); > + u8 tssr_index =3D TSSR_INDEX(offset); > + u32 reg; > + > + raw_spin_lock(&priv->lock); > + reg =3D readl_relaxed(priv->base + TSSR(tssr_index)); > + reg &=3D ~(TSSEL_MASK << tssr_offset); > + writel_relaxed(reg, priv->base + TSSR(tssr_index)); > + raw_spin_unlock(&priv->lock); > + } > + irq_chip_disable_parent(d); > +} > + > +static void rzg2l_irqc_irq_enable(struct irq_data *d) { > + unsigned int hw_irq =3D irqd_to_hwirq(d); > + > + if (hw_irq >=3D IRQC_TINT_START && hw_irq <=3D IRQC_TINT_COUNT) { > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + struct rzg2l_irqc_chip_data *chip_data =3D d->chip_data; > + u32 offset =3D hw_irq - IRQC_TINT_START; > + u32 tssr_offset =3D TSSR_OFFSET(offset); > + u8 tssr_index =3D TSSR_INDEX(offset); > + u32 reg; > + > + raw_spin_lock(&priv->lock); > + reg =3D readl_relaxed(priv->base + TSSR(tssr_index)); > + reg |=3D (TIEN | chip_data->tint) << TSSEL_SHIFT(tssr_offset); > + writel_relaxed(reg, priv->base + TSSR(tssr_index)); > + raw_spin_unlock(&priv->lock); > + } > + irq_chip_enable_parent(d); > +} > + > +static int rzg2l_irq_set_type(struct irq_data *d, unsigned int type) { > + unsigned int hw_irq =3D irqd_to_hwirq(d) - IRQC_IRQ_START; > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + u16 sense, tmp; > + > + switch (type & IRQ_TYPE_SENSE_MASK) { > + case IRQ_TYPE_LEVEL_LOW: > + sense =3D IITSR_IITSEL_LEVEL_LOW; > + break; > + > + case IRQ_TYPE_EDGE_FALLING: > + sense =3D IITSR_IITSEL_EDGE_FALLING; > + break; > + > + case IRQ_TYPE_EDGE_RISING: > + sense =3D IITSR_IITSEL_EDGE_RISING; > + break; > + > + case IRQ_TYPE_EDGE_BOTH: > + sense =3D IITSR_IITSEL_EDGE_BOTH; > + break; > + > + default: > + return -EINVAL; > + } > + > + raw_spin_lock(&priv->lock); > + tmp =3D readl_relaxed(priv->base + IITSR); > + tmp &=3D ~IITSR_IITSEL_MASK(hw_irq); > + tmp |=3D IITSR_IITSEL(hw_irq, sense); > + writel_relaxed(tmp, priv->base + IITSR); > + raw_spin_unlock(&priv->lock); > + > + return 0; > +} > + > +static int rzg2l_tint_set_edge(struct irq_data *d, unsigned int type) { > + struct rzg2l_irqc_priv *priv =3D irq_data_to_priv(d); > + unsigned int hwirq =3D irqd_to_hwirq(d); > + u32 titseln =3D hwirq - IRQC_TINT_START; > + u32 offset; > + u8 sense; > + u32 reg; > + > + switch (type & IRQ_TYPE_SENSE_MASK) { > + case IRQ_TYPE_EDGE_RISING: > + sense =3D TITSR_TITSEL_EDGE_RISING; > + break; > + > + case IRQ_TYPE_EDGE_FALLING: > + sense =3D TITSR_TITSEL_EDGE_FALLING; > + break; > + > + default: > + return -EINVAL; > + } > + > + offset =3D TITSR0; > + if (titseln >=3D TITSR0_MAX_INT) { > + titseln -=3D TITSR0_MAX_INT; > + offset =3D TITSR1; > + } > + > + raw_spin_lock(&priv->lock); > + reg =3D readl_relaxed(priv->base + offset); > + reg &=3D ~(IRQ_MASK << (titseln * TITSEL_WIDTH)); > + reg |=3D sense << (titseln * TITSEL_WIDTH); > + writel_relaxed(reg, priv->base + offset); > + raw_spin_unlock(&priv->lock); > + > + return 0; > +} > + > +static int rzg2l_irqc_set_type(struct irq_data *d, unsigned int type) { > + unsigned int hw_irq =3D irqd_to_hwirq(d); > + int ret =3D -EINVAL; > + > + if (hw_irq >=3D IRQC_IRQ_START && hw_irq <=3D IRQC_IRQ_COUNT) > + ret =3D rzg2l_irq_set_type(d, type); > + else if (hw_irq >=3D IRQC_TINT_START && hw_irq <=3D IRQC_TINT_COUNT) > + ret =3D rzg2l_tint_set_edge(d, type); > + if (ret) > + return ret; > + > + return irq_chip_set_type_parent(d, IRQ_TYPE_LEVEL_HIGH); } > + > +static struct irq_chip irqc_chip =3D { > + .name =3D "rzg2l-irqc", > + .irq_eoi =3D rzg2l_irqc_eoi, > + .irq_mask =3D irq_chip_mask_parent, > + .irq_unmask =3D irq_chip_unmask_parent, > + .irq_disable =3D rzg2l_irqc_irq_disable, > + .irq_enable =3D rzg2l_irqc_irq_enable, > + .irq_get_irqchip_state =3D irq_chip_get_parent_state, > + .irq_set_irqchip_state =3D irq_chip_set_parent_state, > + .irq_retrigger =3D irq_chip_retrigger_hierarchy, > + .irq_set_type =3D rzg2l_irqc_set_type, > + .flags =3D 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) { > + struct rzg2l_irqc_priv *priv =3D domain->host_data; > + struct rzg2l_irqc_chip_data *chip_data =3D NULL; > + struct irq_fwspec spec; > + irq_hw_number_t hwirq; > + int tint =3D -EINVAL; > + unsigned int type; > + unsigned int i; > + int ret; > + > + ret =3D irq_domain_translate_twocell(domain, arg, &hwirq, &type); > + if (ret) > + return ret; > + > + /* > + * For TINIT interrupts ie where pinctrl driver is child of irqc Minor pick. Typo TINIT->TINT?? Similarly, 2 other places below. > domain > + * the hwirq and TINT are encoded in fwspec->param[0]. > + * hwirq for TINIT range from 9-40, hwirq is embedded 0-15 bits and > TINT > + * from 16-31 bits. TINIT from the pinctrl driver needs to be > programmed > + * in IRQC registers to enable a given gpio pin as interrupt. > + */ > + if (hwirq > IRQC_IRQ_COUNT) { > + tint =3D TINT_EXTRACT_GPIOINT(hwirq); > + hwirq =3D TINT_EXTRACT_HWIRQ(hwirq); > + > + if (hwirq < IRQC_TINT_START) > + return -EINVAL; > + } > + > + if (hwirq > (IRQC_NUM_IRQ - 1)) > + return -EINVAL; > + > + chip_data =3D kzalloc(sizeof(*chip_data), GFP_KERNEL); > + if (!chip_data) > + return -ENOMEM; > + chip_data->tint =3D tint; > + > + ret =3D irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &irqc_chip, > + chip_data); > + if (ret) { > + kfree(chip_data); > + return ret; > + } > + > + spec.fwnode =3D domain->parent->fwnode; > + spec.param_count =3D priv->map[hwirq].args_count; > + for (i =3D 0; i < spec.param_count; i++) > + spec.param[i] =3D priv->map[hwirq].args[i]; > + > + ret =3D irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &spec); > + if (ret) > + kfree(chip_data); > + > + return ret; > +} > + > +static void rzg2l_irqc_domain_free(struct irq_domain *domain, unsigned i= nt > virq, > + unsigned int nr_irqs) > +{ > + struct irq_data *d; > + > + d =3D irq_domain_get_irq_data(domain, virq); > + if (d) { > + struct rzg2l_irqc_chip_data *chip_data =3D d->chip_data; > + > + kfree(chip_data); > + } > + irq_domain_free_irqs_common(domain, virq, nr_irqs); } > + > +static const struct irq_domain_ops rzg2l_irqc_domain_ops =3D { > + .alloc =3D rzg2l_irqc_alloc, > + .free =3D rzg2l_irqc_domain_free, > + .translate =3D irq_domain_translate_twocell, }; > + > +static int rzg2l_irqc_parse_map(struct rzg2l_irqc_priv *priv, > + struct device_node *np) > +{ > + unsigned int i; > + int ret; > + > + for (i =3D 0; i < IRQC_NUM_IRQ; i++) { > + ret =3D of_irq_parse_one(np, i, &priv->map[i]); > + if (ret) > + return ret; > + } > + > + return 0; > +} > + > +static int rzg2l_irqc_init(struct device_node *node, struct device_node > +*parent) { > + struct irq_domain *irq_domain, *parent_domain; > + struct reset_control *resetn; > + struct rzg2l_irqc_priv *priv; > + struct clk *clk; > + struct clk *pclk; > + int ret; > + > + priv =3D kzalloc(sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->base =3D of_iomap(node, 0); > + if (!priv->base) { > + ret =3D -ENXIO; > + goto free_priv; > + } > + > + clk =3D of_clk_get_by_name(node, "clk"); > + if (IS_ERR(clk)) { > + ret =3D IS_ERR(clk); > + goto iounmap_base; > + } > + > + pclk =3D of_clk_get_by_name(node, "pclk"); > + if (IS_ERR(pclk)) { > + ret =3D IS_ERR(pclk); > + goto iounmap_base; > + } > + > + resetn =3D of_reset_control_get_exclusive_by_index(node, 0); > + if (IS_ERR(resetn)) { > + ret =3D IS_ERR(resetn); > + goto iounmap_base; > + } > + > + parent_domain =3D irq_find_host(parent); > + if (!parent_domain) { > + pr_err("%pOF: cannot find parent domain\n", node); > + ret =3D -ENODEV; > + goto iounmap_base; > + } > + > + ret =3D rzg2l_irqc_parse_map(priv, node); > + if (ret) { > + pr_err("%pOF: cannot parse interrupts: %d\n", node, ret); > + goto iounmap_base; > + } > + > + ret =3D reset_control_deassert(resetn); > + if (ret) { > + pr_err("%pOF: failed to deassert resetn pin, %d\n", node, > ret); > + goto iounmap_base; > + } > + > + raw_spin_lock_init(&priv->lock); > + > + ret =3D clk_prepare_enable(clk); > + if (ret) > + goto assert_reset; > + > + ret =3D clk_prepare_enable(pclk); > + if (ret) > + goto disable_clk; > + > + irq_domain =3D irq_domain_add_hierarchy(parent_domain, 0, > IRQC_NUM_IRQ, > + node, &rzg2l_irqc_domain_ops, > + priv); > + if (!irq_domain) { > + pr_err("%pOF: cannot initialize irq domain\n", node); > + ret =3D -ENOMEM; > + goto fail_irq_domain; > + } > + > + return 0; > + > +fail_irq_domain: > + clk_disable_unprepare(pclk); > +disable_clk: > + clk_disable_unprepare(clk); > +assert_reset: > + reset_control_assert(resetn); > +iounmap_base: > + iounmap(priv->base); > +free_priv: > + kfree(priv); > + return ret; > +} > + > +IRQCHIP_PLATFORM_DRIVER_BEGIN(rzg2l_irqc) > +IRQCHIP_MATCH("renesas,rzg2l-irqc", rzg2l_irqc_init) > +IRQCHIP_PLATFORM_DRIVER_END(rzg2l_irqc) > +MODULE_AUTHOR("Lad Prabhakar > +"); > +MODULE_DESCRIPTION("Renesas RZ/G2L IRQC Driver"); > +MODULE_LICENSE("GPL"); > -- > 2.25.1