[PATCH v12 01/38] gpio: ep93xx: split device in multiple

From: Nikita Shubin via B4 Relay
Date: Mon Sep 09 2024 - 04:13:17 EST

From: Nikita Shubin <nikita.shubin@xxxxxxxxxxx>

Prepare ep93xx SOC gpio to convert into device tree driver:
- dropped banks and legacy defines
- split AB IRQ and make it shared

We are relying on IRQ number information A, B ports have single shared
IRQ, while F port have dedicated IRQ for each line.

Also we had to split single ep93xx platform_device into multiple, one
for each port, without this we can't do a full working transition from
legacy platform code into device tree capable. All GPIO_LOOKUP were
change to match new chip namings.

Signed-off-by: Nikita Shubin <nikita.shubin@xxxxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy@xxxxxxxxxx>
---
arch/arm/mach-ep93xx/core.c | 121 ++++++++++++--
arch/arm/mach-ep93xx/edb93xx.c | 2 +-
arch/arm/mach-ep93xx/ts72xx.c | 4 +-
arch/arm/mach-ep93xx/vision_ep9307.c | 10 +-
drivers/gpio/gpio-ep93xx.c | 311 +++++++++++++----------------------
5 files changed, 228 insertions(+), 220 deletions(-)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 8b1ec60a9a46..03bce5e9d1f1 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -35,6 +35,7 @@
#include <linux/reboot.h>
#include <linux/usb/ohci_pdriver.h>
#include <linux/random.h>
+#include <linux/ioport.h>

#include "hardware.h"
#include <linux/platform_data/video-ep93xx.h>
@@ -139,9 +140,80 @@ EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
/*************************************************************************
* EP93xx GPIO
*************************************************************************/
-static struct resource ep93xx_gpio_resource[] = {
- DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
+/* port A */
+static struct resource ep93xx_a_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x10, 0x04, "dir"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x90, 0x1c, "intr"),
DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB),
+};
+
+static struct platform_device ep93xx_a_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(ep93xx_a_gpio_resources),
+ .resource = ep93xx_a_gpio_resources,
+};
+
+/* port B */
+static struct resource ep93xx_b_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x04, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x14, 0x04, "dir"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0xac, 0x1c, "intr"),
+ DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB),
+};
+
+static struct platform_device ep93xx_b_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(ep93xx_b_gpio_resources),
+ .resource = ep93xx_b_gpio_resources,
+};
+
+/* port C */
+static struct resource ep93xx_c_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x08, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x18, 0x04, "dir"),
+};
+
+static struct platform_device ep93xx_c_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 2,
+ .num_resources = ARRAY_SIZE(ep93xx_c_gpio_resources),
+ .resource = ep93xx_c_gpio_resources,
+};
+
+/* port D */
+static struct resource ep93xx_d_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x0c, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x1c, 0x04, "dir"),
+};
+
+static struct platform_device ep93xx_d_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 3,
+ .num_resources = ARRAY_SIZE(ep93xx_d_gpio_resources),
+ .resource = ep93xx_d_gpio_resources,
+};
+
+/* port E */
+static struct resource ep93xx_e_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x20, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x24, 0x04, "dir"),
+};
+
+static struct platform_device ep93xx_e_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 4,
+ .num_resources = ARRAY_SIZE(ep93xx_e_gpio_resources),
+ .resource = ep93xx_e_gpio_resources,
+};
+
+/* port F */
+static struct resource ep93xx_f_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x30, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x34, 0x04, "dir"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x4c, 0x1c, "intr"),
DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX),
DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX),
DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX),
@@ -152,11 +224,34 @@ static struct resource ep93xx_gpio_resource[] = {
DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX),
};

-static struct platform_device ep93xx_gpio_device = {
- .name = "gpio-ep93xx",
- .id = -1,
- .num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
- .resource = ep93xx_gpio_resource,
+static struct platform_device ep93xx_f_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 5,
+ .num_resources = ARRAY_SIZE(ep93xx_f_gpio_resources),
+ .resource = ep93xx_f_gpio_resources,
+};
+
+/* port G */
+static struct resource ep93xx_g_gpio_resources[] = {
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x38, 0x04, "data"),
+ DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x3c, 0x04, "dir"),
+};
+
+static struct platform_device ep93xx_g_gpio = {
+ .name = "gpio-ep93xx",
+ .id = 6,
+ .num_resources = ARRAY_SIZE(ep93xx_g_gpio_resources),
+ .resource = ep93xx_g_gpio_resources,
+};
+
+static struct platform_device *ep93xx_gpio_device[] __initdata = {
+ &ep93xx_a_gpio,
+ &ep93xx_b_gpio,
+ &ep93xx_c_gpio,
+ &ep93xx_d_gpio,
+ &ep93xx_e_gpio,
+ &ep93xx_f_gpio,
+ &ep93xx_g_gpio,
};

/*************************************************************************
@@ -335,9 +430,9 @@ static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
.dev_id = "i2c-gpio.0",
.table = {
/* Use local offsets on gpiochip/port "G" */
- GPIO_LOOKUP_IDX("G", 1, NULL, 0,
+ GPIO_LOOKUP_IDX("gpio-ep93xx.6", 1, NULL, 0,
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
- GPIO_LOOKUP_IDX("G", 0, NULL, 1,
+ GPIO_LOOKUP_IDX("gpio-ep93xx.6", 0, NULL, 1,
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
{ }
},
@@ -441,8 +536,8 @@ static struct gpiod_lookup_table ep93xx_leds_gpio_table = {
.dev_id = "leds-gpio",
.table = {
/* Use local offsets on gpiochip/port "E" */
- GPIO_LOOKUP_IDX("E", 0, NULL, 0, GPIO_ACTIVE_HIGH),
- GPIO_LOOKUP_IDX("E", 1, NULL, 1, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.4", 0, NULL, 0, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.4", 1, NULL, 1, GPIO_ACTIVE_HIGH),
{ }
},
};
@@ -975,6 +1070,7 @@ static struct device __init *ep93xx_init_soc(void)
struct device __init *ep93xx_init_devices(void)
{
struct device *parent;
+ unsigned int i;

/* Disallow access to MaverickCrunch initially */
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
@@ -989,7 +1085,8 @@ struct device __init *ep93xx_init_devices(void)
parent = ep93xx_init_soc();

/* Get the GPIO working early, other devices need it */
- platform_device_register(&ep93xx_gpio_device);
+ for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_device); i++)
+ platform_device_register(ep93xx_gpio_device[i]);

amba_device_register(&uart1_device, &iomem_resource);
amba_device_register(&uart2_device, &iomem_resource);
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index dbdb822a0100..356b0460c7ed 100644
--- a/arch/arm/mach-ep93xx/edb93xx.c
+++ b/arch/arm/mach-ep93xx/edb93xx.c
@@ -105,7 +105,7 @@ static struct spi_board_info edb93xx_spi_board_info[] __initdata = {
static struct gpiod_lookup_table edb93xx_spi_cs_gpio_table = {
.dev_id = "spi0",
.table = {
- GPIO_LOOKUP("A", 6, "cs", GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP("gpio-ep93xx.0", 6, "cs", GPIO_ACTIVE_LOW),
{ },
},
};
diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
index d3de7283ecb3..0bbdf587c685 100644
--- a/arch/arm/mach-ep93xx/ts72xx.c
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -268,7 +268,7 @@ static struct spi_board_info bk3_spi_board_info[] __initdata = {
static struct gpiod_lookup_table bk3_spi_cs_gpio_table = {
.dev_id = "spi0",
.table = {
- GPIO_LOOKUP("F", 3, "cs", GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP("gpio-ep93xx.5", 3, "cs", GPIO_ACTIVE_LOW),
{ },
},
};
@@ -318,7 +318,7 @@ static struct gpiod_lookup_table ts72xx_spi_cs_gpio_table = {
.dev_id = "spi0",
.table = {
/* DIO_17 */
- GPIO_LOOKUP("F", 2, "cs", GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP("gpio-ep93xx.5", 2, "cs", GPIO_ACTIVE_LOW),
{ },
},
};
diff --git a/arch/arm/mach-ep93xx/vision_ep9307.c b/arch/arm/mach-ep93xx/vision_ep9307.c
index 9471938df64c..b3087b8eed3f 100644
--- a/arch/arm/mach-ep93xx/vision_ep9307.c
+++ b/arch/arm/mach-ep93xx/vision_ep9307.c
@@ -206,9 +206,9 @@ static struct gpiod_lookup_table vision_spi_mmc_gpio_table = {
.dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */
.table = {
/* Card detect */
- GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.1", 7, NULL, 0, GPIO_ACTIVE_LOW),
/* Write protect */
- GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.5", 0, NULL, 1, GPIO_ACTIVE_HIGH),
{ },
},
};
@@ -253,9 +253,9 @@ static struct gpiod_lookup_table vision_spi_cs4271_gpio_table = {
static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
.dev_id = "spi0",
.table = {
- GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
- GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),
- GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.0", 6, "cs", 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.0", 7, "cs", 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-ep93xx.6", 2, "cs", 2, GPIO_ACTIVE_LOW),
{ },
},
};
diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 6cedf46efec6..a55f635585f4 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -18,30 +18,10 @@
#include <linux/gpio/driver.h>
#include <linux/bitops.h>
#include <linux/seq_file.h>
-
-#define EP93XX_GPIO_F_INT_STATUS 0x5c
-#define EP93XX_GPIO_A_INT_STATUS 0xa0
-#define EP93XX_GPIO_B_INT_STATUS 0xbc
-
-/* Maximum value for gpio line identifiers */
-#define EP93XX_GPIO_LINE_MAX 63
-
-/* Number of GPIO chips in EP93XX */
-#define EP93XX_GPIO_CHIP_NUM 8
-
-/* Maximum value for irq capable line identifiers */
-#define EP93XX_GPIO_LINE_MAX_IRQ 23
-
-#define EP93XX_GPIO_A_IRQ_BASE 64
-#define EP93XX_GPIO_B_IRQ_BASE 72
-/*
- * Static mapping of GPIO bank F IRQS:
- * F0..F7 (16..24) to irq 80..87.
- */
-#define EP93XX_GPIO_F_IRQ_BASE 80
+#include <linux/interrupt.h>

struct ep93xx_gpio_irq_chip {
- u8 irq_offset;
+ void __iomem *base;
u8 int_unmasked;
u8 int_enabled;
u8 int_type1;
@@ -50,15 +30,11 @@ struct ep93xx_gpio_irq_chip {
};

struct ep93xx_gpio_chip {
+ void __iomem *base;
struct gpio_chip gc;
struct ep93xx_gpio_irq_chip *eic;
};

-struct ep93xx_gpio {
- void __iomem *base;
- struct ep93xx_gpio_chip gc[EP93XX_GPIO_CHIP_NUM];
-};
-
#define to_ep93xx_gpio_chip(x) container_of(x, struct ep93xx_gpio_chip, gc)

static struct ep93xx_gpio_irq_chip *to_ep93xx_gpio_irq_chip(struct gpio_chip *gc)
@@ -79,25 +55,23 @@ static struct ep93xx_gpio_irq_chip *to_ep93xx_gpio_irq_chip(struct gpio_chip *gc
#define EP93XX_INT_RAW_STATUS_OFFSET 0x14
#define EP93XX_INT_DEBOUNCE_OFFSET 0x18

-static void ep93xx_gpio_update_int_params(struct ep93xx_gpio *epg,
- struct ep93xx_gpio_irq_chip *eic)
+static void ep93xx_gpio_update_int_params(struct ep93xx_gpio_irq_chip *eic)
{
- writeb_relaxed(0, epg->base + eic->irq_offset + EP93XX_INT_EN_OFFSET);
+ writeb_relaxed(0, eic->base + EP93XX_INT_EN_OFFSET);

writeb_relaxed(eic->int_type2,
- epg->base + eic->irq_offset + EP93XX_INT_TYPE2_OFFSET);
+ eic->base + EP93XX_INT_TYPE2_OFFSET);

writeb_relaxed(eic->int_type1,
- epg->base + eic->irq_offset + EP93XX_INT_TYPE1_OFFSET);
+ eic->base + EP93XX_INT_TYPE1_OFFSET);

writeb_relaxed(eic->int_unmasked & eic->int_enabled,
- epg->base + eic->irq_offset + EP93XX_INT_EN_OFFSET);
+ eic->base + EP93XX_INT_EN_OFFSET);
}

static void ep93xx_gpio_int_debounce(struct gpio_chip *gc,
unsigned int offset, bool enable)
{
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);
struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
int port_mask = BIT(offset);

@@ -106,53 +80,43 @@ static void ep93xx_gpio_int_debounce(struct gpio_chip *gc,
else
eic->int_debounce &= ~port_mask;

- writeb(eic->int_debounce,
- epg->base + eic->irq_offset + EP93XX_INT_DEBOUNCE_OFFSET);
+ writeb(eic->int_debounce, eic->base + EP93XX_INT_DEBOUNCE_OFFSET);
}

-static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc)
+static u32 ep93xx_gpio_ab_irq_handler(struct gpio_chip *gc)
{
- struct gpio_chip *gc = irq_desc_get_handler_data(desc);
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);
- struct irq_chip *irqchip = irq_desc_get_chip(desc);
+ struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
unsigned long stat;
int offset;

- chained_irq_enter(irqchip, desc);
-
- /*
- * Dispatch the IRQs to the irqdomain of each A and B
- * gpiochip irqdomains depending on what has fired.
- * The tricky part is that the IRQ line is shared
- * between bank A and B and each has their own gpiochip.
- */
- stat = readb(epg->base + EP93XX_GPIO_A_INT_STATUS);
+ stat = readb(eic->base + EP93XX_INT_STATUS_OFFSET);
for_each_set_bit(offset, &stat, 8)
- generic_handle_domain_irq(epg->gc[0].gc.irq.domain,
- offset);
+ generic_handle_domain_irq(gc->irq.domain, offset);

- stat = readb(epg->base + EP93XX_GPIO_B_INT_STATUS);
- for_each_set_bit(offset, &stat, 8)
- generic_handle_domain_irq(epg->gc[1].gc.irq.domain,
- offset);
+ return stat;
+}

- chained_irq_exit(irqchip, desc);
+static irqreturn_t ep93xx_ab_irq_handler(int irq, void *dev_id)
+{
+ return IRQ_RETVAL(ep93xx_gpio_ab_irq_handler(dev_id));
}

static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc)
{
- /*
- * map discontiguous hw irq range to continuous sw irq range:
- *
- * IRQ_EP93XX_GPIO{0..7}MUX -> EP93XX_GPIO_LINE_F{0..7}
- */
struct irq_chip *irqchip = irq_desc_get_chip(desc);
- unsigned int irq = irq_desc_get_irq(desc);
- int port_f_idx = (irq & 7) ^ 4; /* {20..23,48..51} -> {0..7} */
- int gpio_irq = EP93XX_GPIO_F_IRQ_BASE + port_f_idx;
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct gpio_irq_chip *gic = &gc->irq;
+ unsigned int parent = irq_desc_get_irq(desc);
+ unsigned int i;

chained_irq_enter(irqchip, desc);
- generic_handle_irq(gpio_irq);
+ for (i = 0; i < gic->num_parents; i++)
+ if (gic->parents[i] == parent)
+ break;
+
+ if (i < gic->num_parents)
+ generic_handle_domain_irq(gc->irq.domain, i);
+
chained_irq_exit(irqchip, desc);
}

@@ -160,31 +124,29 @@ static void ep93xx_gpio_irq_ack(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);
- int port_mask = BIT(d->irq & 7);
+ int port_mask = BIT(irqd_to_hwirq(d));

if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
eic->int_type2 ^= port_mask; /* switch edge direction */
- ep93xx_gpio_update_int_params(epg, eic);
+ ep93xx_gpio_update_int_params(eic);
}

- writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET);
+ writeb(port_mask, eic->base + EP93XX_INT_EOI_OFFSET);
}

static void ep93xx_gpio_irq_mask_ack(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);
- int port_mask = BIT(d->irq & 7);
+ int port_mask = BIT(irqd_to_hwirq(d));

if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH)
eic->int_type2 ^= port_mask; /* switch edge direction */

eic->int_unmasked &= ~port_mask;
- ep93xx_gpio_update_int_params(epg, eic);
+ ep93xx_gpio_update_int_params(eic);

- writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET);
+ writeb(port_mask, eic->base + EP93XX_INT_EOI_OFFSET);
gpiochip_disable_irq(gc, irqd_to_hwirq(d));
}

@@ -192,10 +154,9 @@ static void ep93xx_gpio_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);

- eic->int_unmasked &= ~BIT(d->irq & 7);
- ep93xx_gpio_update_int_params(epg, eic);
+ eic->int_unmasked &= ~BIT(irqd_to_hwirq(d));
+ ep93xx_gpio_update_int_params(eic);
gpiochip_disable_irq(gc, irqd_to_hwirq(d));
}

@@ -203,11 +164,10 @@ static void ep93xx_gpio_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);

gpiochip_enable_irq(gc, irqd_to_hwirq(d));
- eic->int_unmasked |= BIT(d->irq & 7);
- ep93xx_gpio_update_int_params(epg, eic);
+ eic->int_unmasked |= BIT(irqd_to_hwirq(d));
+ ep93xx_gpio_update_int_params(eic);
}

/*
@@ -219,8 +179,7 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
- struct ep93xx_gpio *epg = gpiochip_get_data(gc);
- int offset = d->irq & 7;
+ irq_hw_number_t offset = irqd_to_hwirq(d);
int port_mask = BIT(offset);
irq_flow_handler_t handler;

@@ -264,51 +223,11 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)

eic->int_enabled |= port_mask;

- ep93xx_gpio_update_int_params(epg, eic);
+ ep93xx_gpio_update_int_params(eic);

return 0;
}

-/*************************************************************************
- * gpiolib interface for EP93xx on-chip GPIOs
- *************************************************************************/
-struct ep93xx_gpio_bank {
- const char *label;
- int data;
- int dir;
- int irq;
- int base;
- bool has_irq;
- bool has_hierarchical_irq;
- unsigned int irq_base;
-};
-
-#define EP93XX_GPIO_BANK(_label, _data, _dir, _irq, _base, _has_irq, _has_hier, _irq_base) \
- { \
- .label = _label, \
- .data = _data, \
- .dir = _dir, \
- .irq = _irq, \
- .base = _base, \
- .has_irq = _has_irq, \
- .has_hierarchical_irq = _has_hier, \
- .irq_base = _irq_base, \
- }
-
-static struct ep93xx_gpio_bank ep93xx_gpio_banks[] = {
- /* Bank A has 8 IRQs */
- EP93XX_GPIO_BANK("A", 0x00, 0x10, 0x90, 0, true, false, EP93XX_GPIO_A_IRQ_BASE),
- /* Bank B has 8 IRQs */
- EP93XX_GPIO_BANK("B", 0x04, 0x14, 0xac, 8, true, false, EP93XX_GPIO_B_IRQ_BASE),
- EP93XX_GPIO_BANK("C", 0x08, 0x18, 0x00, 40, false, false, 0),
- EP93XX_GPIO_BANK("D", 0x0c, 0x1c, 0x00, 24, false, false, 0),
- EP93XX_GPIO_BANK("E", 0x20, 0x24, 0x00, 32, false, false, 0),
- /* Bank F has 8 IRQs */
- EP93XX_GPIO_BANK("F", 0x30, 0x34, 0x4c, 16, false, true, EP93XX_GPIO_F_IRQ_BASE),
- EP93XX_GPIO_BANK("G", 0x38, 0x3c, 0x00, 48, false, false, 0),
- EP93XX_GPIO_BANK("H", 0x40, 0x44, 0x00, 56, false, false, 0),
-};
-
static int ep93xx_gpio_set_config(struct gpio_chip *gc, unsigned offset,
unsigned long config)
{
@@ -342,110 +261,102 @@ static const struct irq_chip gpio_eic_irq_chip = {
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};

-static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc,
- struct platform_device *pdev,
- struct ep93xx_gpio *epg,
- struct ep93xx_gpio_bank *bank)
+static int ep93xx_setup_irqs(struct platform_device *pdev,
+ struct ep93xx_gpio_chip *egc)
{
- void __iomem *data = epg->base + bank->data;
- void __iomem *dir = epg->base + bank->dir;
struct gpio_chip *gc = &egc->gc;
struct device *dev = &pdev->dev;
- struct gpio_irq_chip *girq;
- int err;
+ struct gpio_irq_chip *girq = &gc->irq;
+ int ret, irq, i;
+ void __iomem *intr;

- err = bgpio_init(gc, dev, 1, data, NULL, NULL, dir, NULL, 0);
- if (err)
- return err;
+ intr = devm_platform_ioremap_resource_byname(pdev, "intr");
+ if (IS_ERR(intr))
+ return PTR_ERR(intr);

- gc->label = bank->label;
- gc->base = bank->base;
+ gc->set_config = ep93xx_gpio_set_config;
+ egc->eic = devm_kzalloc(dev, sizeof(*egc->eic), GFP_KERNEL);
+ if (!egc->eic)
+ return -ENOMEM;

- girq = &gc->irq;
- if (bank->has_irq || bank->has_hierarchical_irq) {
- gc->set_config = ep93xx_gpio_set_config;
- egc->eic = devm_kcalloc(dev, 1,
- sizeof(*egc->eic),
- GFP_KERNEL);
- if (!egc->eic)
- return -ENOMEM;
- egc->eic->irq_offset = bank->irq;
- gpio_irq_chip_set_chip(girq, &gpio_eic_irq_chip);
- }
+ egc->eic->base = intr;
+ gpio_irq_chip_set_chip(girq, &gpio_eic_irq_chip);
+ girq->num_parents = platform_irq_count(pdev);
+ if (girq->num_parents == 0)
+ return -EINVAL;

- if (bank->has_irq) {
- int ab_parent_irq = platform_get_irq(pdev, 0);
+ girq->parents = devm_kcalloc(dev, girq->num_parents,
+ sizeof(*girq->parents),
+ GFP_KERNEL);
+ if (!girq->parents)
+ return -ENOMEM;

- girq->parent_handler = ep93xx_gpio_ab_irq_handler;
- girq->num_parents = 1;
- girq->parents = devm_kcalloc(dev, girq->num_parents,
- sizeof(*girq->parents),
- GFP_KERNEL);
- if (!girq->parents)
- return -ENOMEM;
- girq->default_type = IRQ_TYPE_NONE;
- girq->handler = handle_level_irq;
- girq->parents[0] = ab_parent_irq;
- girq->first = bank->irq_base;
- }
+ if (girq->num_parents == 1) { /* A/B irqchips */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;

- /* Only bank F has especially funky IRQ handling */
- if (bank->has_hierarchical_irq) {
- int gpio_irq;
- int i;
+ ret = devm_request_irq(dev, irq, ep93xx_ab_irq_handler,
+ IRQF_SHARED, gc->label, gc);
+ if (ret)
+ return dev_err_probe(dev, ret, "requesting IRQ: %d\n", irq);

- /*
- * FIXME: convert this to use hierarchical IRQ support!
- * this requires fixing the root irqchip to be hierarchical.
- */
+ girq->parents[0] = irq;
+ } else { /* F irqchip */
girq->parent_handler = ep93xx_gpio_f_irq_handler;
- girq->num_parents = 8;
- girq->parents = devm_kcalloc(dev, girq->num_parents,
- sizeof(*girq->parents),
- GFP_KERNEL);
- if (!girq->parents)
- return -ENOMEM;
- /* Pick resources 1..8 for these IRQs */
+
for (i = 0; i < girq->num_parents; i++) {
- girq->parents[i] = platform_get_irq(pdev, i + 1);
- gpio_irq = bank->irq_base + i;
- irq_set_chip_data(gpio_irq, &epg->gc[5]);
- irq_set_chip_and_handler(gpio_irq,
- girq->chip,
- handle_level_irq);
- irq_clear_status_flags(gpio_irq, IRQ_NOREQUEST);
+ irq = platform_get_irq(pdev, i);
+ if (irq < 0)
+ continue;
+
+ girq->parents[i] = irq;
}
- girq->default_type = IRQ_TYPE_NONE;
- girq->handler = handle_level_irq;
- girq->first = bank->irq_base;
+
+ girq->map = girq->parents;
}

- return devm_gpiochip_add_data(dev, gc, epg);
+ girq->default_type = IRQ_TYPE_NONE;
+ /* TODO: replace with handle_bad_irq() once we are fully hierarchical */
+ girq->handler = handle_simple_irq;
+
+ return 0;
}

static int ep93xx_gpio_probe(struct platform_device *pdev)
{
- struct ep93xx_gpio *epg;
- int i;
+ struct ep93xx_gpio_chip *egc;
+ struct gpio_chip *gc;
+ void __iomem *data;
+ void __iomem *dir;
+ int ret;

- epg = devm_kzalloc(&pdev->dev, sizeof(*epg), GFP_KERNEL);
- if (!epg)
+ egc = devm_kzalloc(&pdev->dev, sizeof(*egc), GFP_KERNEL);
+ if (!egc)
return -ENOMEM;

- epg->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(epg->base))
- return PTR_ERR(epg->base);
+ data = devm_platform_ioremap_resource_byname(pdev, "data");
+ if (IS_ERR(data))
+ return PTR_ERR(data);

- for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) {
- struct ep93xx_gpio_chip *gc = &epg->gc[i];
- struct ep93xx_gpio_bank *bank = &ep93xx_gpio_banks[i];
+ dir = devm_platform_ioremap_resource_byname(pdev, "dir");
+ if (IS_ERR(dir))
+ return PTR_ERR(dir);

- if (ep93xx_gpio_add_bank(gc, pdev, epg, bank))
- dev_warn(&pdev->dev, "Unable to add gpio bank %s\n",
- bank->label);
+ gc = &egc->gc;
+ ret = bgpio_init(gc, &pdev->dev, 1, data, NULL, NULL, dir, NULL, 0);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "unable to init generic GPIO\n");
+
+ gc->label = dev_name(&pdev->dev);
+ if (platform_irq_count(pdev) > 0) {
+ dev_dbg(&pdev->dev, "setting up irqs for %s\n", dev_name(&pdev->dev));
+ ret = ep93xx_setup_irqs(pdev, egc);
+ if (ret)
+ dev_err_probe(&pdev->dev, ret, "setup irqs failed");
}

- return 0;
+ return devm_gpiochip_add_data(&pdev->dev, gc, egc);
}

static struct platform_driver ep93xx_gpio_driver = {

--
2.43.2