[PATCH v6 01/40] ARM: ep93xx: Add terminator to gpiod_lookup_table

[PATCH v6 01/40] ARM: ep93xx: Add terminator to gpiod_lookup_table

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Without the terminator, if a con_id is passed to gpio_find() that
does not exist in the lookup table the function will not stop looping
correctly, and eventually cause an oops.

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 arch/arm/mach-ep93xx/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 71b113976420..8b1ec60a9a46 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -339,6 +339,7 @@ static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
 				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 		GPIO_LOOKUP_IDX("G", 0, NULL, 1,
 				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		{ }
 	},
 };
 

-- 
2.41.0


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Re: [PATCH v6 01/40] ARM: ep93xx: Add terminator to gpiod_lookup_table

[Andy Shevchenko]

On Tue, Dec 12, 2023 at 11:20:18AM +0300, Nikita Shubin wrote:
> Without the terminator, if a con_id is passed to gpio_find() that
> does not exist in the lookup table the function will not stop looping
> correctly, and eventually cause an oops.

Reported-by?
Fixes?

-- 
With Best Regards,
Andy Shevchenko



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[PATCH v6 02/40] gpio: ep93xx: split device in multiple

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

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.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 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 4b90899a66e9..c1e880946f72 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 30d9cf3791eb..020223b0be2b 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),
 		{ },
 	},
 };
@@ -244,9 +244,9 @@ static struct spi_board_info vision_spi_board_info[] __initdata = {
 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 = {

-- 
2.41.0


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[PATCH v6 24/40] input: keypad: ep93xx: add DT support for Cirrus EP93xx

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

- drop flags, they were not used anyway
- add OF ID match table
- process "autorepeat", "debounce-delay-ms", prescale from device tree
- drop platform data usage and it's header
- keymap goes from device tree now on

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 arch/arm/mach-ep93xx/core.c            | 46 ---------------------
 drivers/input/keyboard/ep93xx_keypad.c | 74 ++++++++++------------------------
 include/linux/soc/cirrus/ep93xx.h      |  4 --
 3 files changed, 22 insertions(+), 102 deletions(-)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 03bce5e9d1f1..b99c46d22c4d 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -697,52 +697,6 @@ void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 	platform_device_register(&ep93xx_keypad_device);
 }
 
-int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
-{
-	int err;
-	int i;
-
-	for (i = 0; i < 8; i++) {
-		err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
-		if (err)
-			goto fail_gpio_c;
-		err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
-		if (err)
-			goto fail_gpio_d;
-	}
-
-	/* Enable the keypad controller; GPIO ports C and D used for keypad */
-	ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
-				 EP93XX_SYSCON_DEVCFG_GONK);
-
-	return 0;
-
-fail_gpio_d:
-	gpio_free(EP93XX_GPIO_LINE_C(i));
-fail_gpio_c:
-	for (--i; i >= 0; --i) {
-		gpio_free(EP93XX_GPIO_LINE_C(i));
-		gpio_free(EP93XX_GPIO_LINE_D(i));
-	}
-	return err;
-}
-EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
-
-void ep93xx_keypad_release_gpio(struct platform_device *pdev)
-{
-	int i;
-
-	for (i = 0; i < 8; i++) {
-		gpio_free(EP93XX_GPIO_LINE_C(i));
-		gpio_free(EP93XX_GPIO_LINE_D(i));
-	}
-
-	/* Disable the keypad controller; GPIO ports C and D used for GPIO */
-	ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
-			       EP93XX_SYSCON_DEVCFG_GONK);
-}
-EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
-
 /*************************************************************************
  * EP93xx I2S audio peripheral handling
  *************************************************************************/
diff --git a/drivers/input/keyboard/ep93xx_keypad.c b/drivers/input/keyboard/ep93xx_keypad.c
index 6b811d6bf625..515880c194c9 100644
--- a/drivers/input/keyboard/ep93xx_keypad.c
+++ b/drivers/input/keyboard/ep93xx_keypad.c
@@ -6,20 +6,13 @@
  *
  * Based on the pxa27x matrix keypad controller by Rodolfo Giometti.
  *
- * NOTE:
- *
- * The 3-key reset is triggered by pressing the 3 keys in
- * Row 0, Columns 2, 4, and 7 at the same time.  This action can
- * be disabled by setting the EP93XX_KEYPAD_DISABLE_3_KEY flag.
- *
- * Normal operation for the matrix does not autorepeat the key press.
- * This action can be enabled by setting the EP93XX_KEYPAD_AUTOREPEAT
- * flag.
  */
 
 #include <linux/bits.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/interrupt.h>
 #include <linux/clk.h>
 #include <linux/io.h>
@@ -27,7 +20,6 @@
 #include <linux/input/matrix_keypad.h>
 #include <linux/slab.h>
 #include <linux/soc/cirrus/ep93xx.h>
-#include <linux/platform_data/keypad-ep93xx.h>
 #include <linux/pm_wakeirq.h>
 
 /*
@@ -61,12 +53,16 @@
 #define KEY_REG_KEY1_MASK	GENMASK(5, 0)
 #define KEY_REG_KEY1_SHIFT	0
 
+#define EP93XX_MATRIX_ROWS		(8)
+#define EP93XX_MATRIX_COLS		(8)
+
 #define EP93XX_MATRIX_SIZE	(EP93XX_MATRIX_ROWS * EP93XX_MATRIX_COLS)
 
 struct ep93xx_keypad {
-	struct ep93xx_keypad_platform_data *pdata;
 	struct input_dev *input_dev;
 	struct clk *clk;
+	unsigned int	debounce;
+	uint16_t	prescale;
 
 	void __iomem *mmio_base;
 
@@ -133,23 +129,11 @@ static irqreturn_t ep93xx_keypad_irq_handler(int irq, void *dev_id)
 
 static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
 {
-	struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
 	unsigned int val = 0;
 
-	clk_set_rate(keypad->clk, pdata->clk_rate);
+	val |= ((keypad->debounce << KEY_INIT_DBNC_SHIFT) & KEY_INIT_DBNC_MASK);
 
-	if (pdata->flags & EP93XX_KEYPAD_DISABLE_3_KEY)
-		val |= KEY_INIT_DIS3KY;
-	if (pdata->flags & EP93XX_KEYPAD_DIAG_MODE)
-		val |= KEY_INIT_DIAG;
-	if (pdata->flags & EP93XX_KEYPAD_BACK_DRIVE)
-		val |= KEY_INIT_BACK;
-	if (pdata->flags & EP93XX_KEYPAD_TEST_MODE)
-		val |= KEY_INIT_T2;
-
-	val |= ((pdata->debounce << KEY_INIT_DBNC_SHIFT) & KEY_INIT_DBNC_MASK);
-
-	val |= ((pdata->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK);
+	val |= ((keypad->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK);
 
 	__raw_writel(val, keypad->mmio_base + KEY_INIT);
 }
@@ -220,17 +204,10 @@ static int ep93xx_keypad_resume(struct device *dev)
 static DEFINE_SIMPLE_DEV_PM_OPS(ep93xx_keypad_pm_ops,
 				ep93xx_keypad_suspend, ep93xx_keypad_resume);
 
-static void ep93xx_keypad_release_gpio_action(void *_pdev)
-{
-	struct platform_device *pdev = _pdev;
-
-	ep93xx_keypad_release_gpio(pdev);
-}
-
 static int ep93xx_keypad_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct ep93xx_keypad *keypad;
-	const struct matrix_keymap_data *keymap_data;
 	struct input_dev *input_dev;
 	int err;
 
@@ -238,14 +215,6 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
 	if (!keypad)
 		return -ENOMEM;
 
-	keypad->pdata = dev_get_platdata(&pdev->dev);
-	if (!keypad->pdata)
-		return -EINVAL;
-
-	keymap_data = keypad->pdata->keymap_data;
-	if (!keymap_data)
-		return -EINVAL;
-
 	keypad->irq = platform_get_irq(pdev, 0);
 	if (keypad->irq < 0)
 		return keypad->irq;
@@ -254,19 +223,13 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
 	if (IS_ERR(keypad->mmio_base))
 		return PTR_ERR(keypad->mmio_base);
 
-	err = ep93xx_keypad_acquire_gpio(pdev);
-	if (err)
-		return err;
-
-	err = devm_add_action_or_reset(&pdev->dev,
-				       ep93xx_keypad_release_gpio_action, pdev);
-	if (err)
-		return err;
-
 	keypad->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(keypad->clk))
 		return PTR_ERR(keypad->clk);
 
+	device_property_read_u32(dev, "debounce-delay-ms", &keypad->debounce);
+	device_property_read_u16(dev, "cirrus,prescale", &keypad->prescale);
+
 	input_dev = devm_input_allocate_device(&pdev->dev);
 	if (!input_dev)
 		return -ENOMEM;
@@ -278,13 +241,13 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
 	input_dev->open = ep93xx_keypad_open;
 	input_dev->close = ep93xx_keypad_close;
 
-	err = matrix_keypad_build_keymap(keymap_data, NULL,
+	err = matrix_keypad_build_keymap(NULL, NULL,
 					 EP93XX_MATRIX_ROWS, EP93XX_MATRIX_COLS,
 					 keypad->keycodes, input_dev);
 	if (err)
 		return err;
 
-	if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)
+	if (device_property_read_bool(&pdev->dev, "autorepeat"))
 		__set_bit(EV_REP, input_dev->evbit);
 	input_set_drvdata(input_dev, keypad);
 
@@ -313,10 +276,17 @@ static void ep93xx_keypad_remove(struct platform_device *pdev)
 	dev_pm_clear_wake_irq(&pdev->dev);
 }
 
+static const struct of_device_id ep93xx_keypad_of_ids[] = {
+	{ .compatible = "cirrus,ep9307-keypad" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ep93xx_keypad_of_ids);
+
 static struct platform_driver ep93xx_keypad_driver = {
 	.driver		= {
 		.name	= "ep93xx-keypad",
 		.pm	= pm_sleep_ptr(&ep93xx_keypad_pm_ops),
+		.of_match_table = ep93xx_keypad_of_ids,
 	},
 	.probe		= ep93xx_keypad_probe,
 	.remove_new	= ep93xx_keypad_remove,
diff --git a/include/linux/soc/cirrus/ep93xx.h b/include/linux/soc/cirrus/ep93xx.h
index fc35be3af723..ea2b2c1074e4 100644
--- a/include/linux/soc/cirrus/ep93xx.h
+++ b/include/linux/soc/cirrus/ep93xx.h
@@ -41,8 +41,6 @@ int ep93xx_pwm_acquire_gpio(struct platform_device *pdev);
 void ep93xx_pwm_release_gpio(struct platform_device *pdev);
 int ep93xx_ide_acquire_gpio(struct platform_device *pdev);
 void ep93xx_ide_release_gpio(struct platform_device *pdev);
-int ep93xx_keypad_acquire_gpio(struct platform_device *pdev);
-void ep93xx_keypad_release_gpio(struct platform_device *pdev);
 int ep93xx_i2s_acquire(void);
 void ep93xx_i2s_release(void);
 unsigned int ep93xx_chip_revision(void);
@@ -52,8 +50,6 @@ static inline int ep93xx_pwm_acquire_gpio(struct platform_device *pdev) { return
 static inline void ep93xx_pwm_release_gpio(struct platform_device *pdev) {}
 static inline int ep93xx_ide_acquire_gpio(struct platform_device *pdev) { return 0; }
 static inline void ep93xx_ide_release_gpio(struct platform_device *pdev) {}
-static inline int ep93xx_keypad_acquire_gpio(struct platform_device *pdev) { return 0; }
-static inline void ep93xx_keypad_release_gpio(struct platform_device *pdev) {}
 static inline int ep93xx_i2s_acquire(void) { return 0; }
 static inline void ep93xx_i2s_release(void) {}
 static inline unsigned int ep93xx_chip_revision(void) { return 0; }

-- 
2.41.0


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Re: [PATCH v6 24/40] input: keypad: ep93xx: add DT support for Cirrus EP93xx

[Andy Shevchenko]

On Tue, Dec 12, 2023 at 11:20:41AM +0300, Nikita Shubin wrote:
> - drop flags, they were not used anyway
> - add OF ID match table
> - process "autorepeat", "debounce-delay-ms", prescale from device tree
> - drop platform data usage and it's header
> - keymap goes from device tree now on

...

>  static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
>  {
>  	unsigned int val = 0;
>  
> +	val |= ((keypad->debounce << KEY_INIT_DBNC_SHIFT) & KEY_INIT_DBNC_MASK);

Since you are touching these lines (see below) you can drop unneeded outer
parentheses.

>  
> +	val |= ((keypad->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK);

See above.

>  	__raw_writel(val, keypad->mmio_base + KEY_INIT);
>  }

-- 
With Best Regards,
Andy Shevchenko



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[PATCH v6 28/40] ASoC: dt-bindings: ep93xx: Document DMA support

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Document DMA support in binding document.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 .../devicetree/bindings/sound/cirrus,ep9301-i2s.yaml         | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml b/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml
index 453d493c941f..36a320ddf534 100644
--- a/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml
@@ -40,6 +40,16 @@ properties:
       - const: sclk
       - const: lrclk
 
+  dmas:
+    items:
+      - description: out DMA channel
+      - description: in DMA channel
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
 required:
   - compatible
   - '#sound-dai-cells'
@@ -61,6 +71,8 @@ examples:
                  <&syscon 30>,
                  <&syscon 31>;
         clock-names = "mclk", "sclk", "lrclk";
+        dmas = <&dma0 0 1>, <&dma0 0 2>;
+        dma-names = "tx", "rx";
     };
 
 ...

-- 
2.41.0


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[PATCH v6 29/40] ASoC: dt-bindings: ep93xx: Document Audio Port support

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Document Audio Graph Port support in binding document.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml b/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml
index 36a320ddf534..4693e85aed37 100644
--- a/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml
@@ -50,6 +50,10 @@ properties:
       - const: tx
       - const: rx
 
+  port:
+    $ref: audio-graph-port.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - '#sound-dai-cells'

-- 
2.41.0


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[PATCH v6 34/40] ARM: ep93xx: DT for the Cirrus ep93xx SoC platforms

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Add compulsory device tree support to the Cirrus ep93xx ARMv4 platform.

- select PINCTRL_EP93xx
- select COMMON_CLK_EP93XX, as clock driver moved out of platform code
- select ARCH_HAS_RESET_CONTROLLER

Select ARM_ATAG_DTB_COMPAT to update device tree with information
about memory passed from bootloader.

We have to leave all MACH options as they are used for board checking
before decomp, to turn off watchdog and ethernet DMA.

Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 arch/arm/Makefile             |  1 -
 arch/arm/mach-ep93xx/Kconfig  | 20 ++++++++++----------
 arch/arm/mach-ep93xx/Makefile | 11 -----------
 3 files changed, 10 insertions(+), 22 deletions(-)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 5ba42f69f8ce..82349c2d7b17 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -179,7 +179,6 @@ machine-$(CONFIG_ARCH_CLPS711X)		+= clps711x
 machine-$(CONFIG_ARCH_DAVINCI)		+= davinci
 machine-$(CONFIG_ARCH_DIGICOLOR)	+= digicolor
 machine-$(CONFIG_ARCH_DOVE)		+= dove
-machine-$(CONFIG_ARCH_EP93XX)		+= ep93xx
 machine-$(CONFIG_ARCH_EXYNOS)		+= exynos
 machine-$(CONFIG_ARCH_FOOTBRIDGE)	+= footbridge
 machine-$(CONFIG_ARCH_GEMINI)		+= gemini
diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
index 703f3d232a60..812b71dcf60e 100644
--- a/arch/arm/mach-ep93xx/Kconfig
+++ b/arch/arm/mach-ep93xx/Kconfig
@@ -3,27 +3,27 @@ menuconfig ARCH_EP93XX
 	bool "EP93xx-based"
 	depends on ATAGS
 	depends on ARCH_MULTI_V4T
+	# CONFIG_ARCH_MULTI_V7 is not set
 	depends on CPU_LITTLE_ENDIAN
+	select ARCH_HAS_RESET_CONTROLLER
 	select ARCH_SPARSEMEM_ENABLE
 	select ARM_AMBA
 	select ARM_VIC
+	select ARM_APPENDED_DTB # Old Redboot bootloaders deployed
+	select ARM_ATAG_DTB_COMPAT # we need this to update dt memory node
+	select COMMON_CLK_EP93XX
+	select EP93XX_TIMER
 	select CLKSRC_MMIO
 	select CPU_ARM920T
 	select GPIOLIB
+	select PINCTRL
+	select PINCTRL_EP93XX
 	help
 	  This enables support for the Cirrus EP93xx series of CPUs.
 
 if ARCH_EP93XX
 
-menu "Cirrus EP93xx Implementation Options"
-
-config EP93XX_SOC_COMMON
-	bool
-	default y
-	select SOC_BUS
-	select LEDS_GPIO_REGISTER
-
-comment "EP93xx Platforms"
+# menu "EP93xx Platforms"
 
 config MACH_BK3
 	bool "Support Liebherr BK3.1"
@@ -103,6 +103,6 @@ config MACH_VISION_EP9307
 	  Say 'Y' here if you want your kernel to support the
 	  Vision Engraving Systems EP9307 SoM.
 
-endmenu
+# endmenu
 
 endif
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
deleted file mode 100644
index 62e37403df14..000000000000
--- a/arch/arm/mach-ep93xx/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for the linux kernel.
-#
-obj-y			:= core.o clock.o timer-ep93xx.o
-
-obj-$(CONFIG_EP93XX_DMA)	+= dma.o
-
-obj-$(CONFIG_MACH_EDB93XX)	+= edb93xx.o
-obj-$(CONFIG_MACH_TS72XX)	+= ts72xx.o
-obj-$(CONFIG_MACH_VISION_EP9307)+= vision_ep9307.o

-- 
2.41.0


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[PATCH v6 35/40] pwm: ep93xx: drop legacy pinctrl

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Drop legacy gpio request/free since we are using
pinctrl for this now.

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 arch/arm/mach-ep93xx/core.c       | 42 ---------------------------------------
 drivers/pwm/pwm-ep93xx.c          | 18 -----------------
 include/linux/soc/cirrus/ep93xx.h |  4 ----
 3 files changed, 64 deletions(-)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index b99c46d22c4d..4ddf1a4cba33 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -577,48 +577,6 @@ void __init ep93xx_register_pwm(int pwm0, int pwm1)
 		platform_device_register(&ep93xx_pwm1_device);
 }
 
-int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
-{
-	int err;
-
-	if (pdev->id == 0) {
-		err = 0;
-	} else if (pdev->id == 1) {
-		err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
-				   dev_name(&pdev->dev));
-		if (err)
-			return err;
-		err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
-		if (err)
-			goto fail;
-
-		/* PWM 1 output on EGPIO[14] */
-		ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
-	} else {
-		err = -ENODEV;
-	}
-
-	return err;
-
-fail:
-	gpio_free(EP93XX_GPIO_LINE_EGPIO14);
-	return err;
-}
-EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
-
-void ep93xx_pwm_release_gpio(struct platform_device *pdev)
-{
-	if (pdev->id == 1) {
-		gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
-		gpio_free(EP93XX_GPIO_LINE_EGPIO14);
-
-		/* EGPIO[14] used for GPIO */
-		ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
-	}
-}
-EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
-
-
 /*************************************************************************
  * EP93xx video peripheral handling
  *************************************************************************/
diff --git a/drivers/pwm/pwm-ep93xx.c b/drivers/pwm/pwm-ep93xx.c
index 7cf05d0b78fb..0d17dbe10fcf 100644
--- a/drivers/pwm/pwm-ep93xx.c
+++ b/drivers/pwm/pwm-ep93xx.c
@@ -27,8 +27,6 @@
 
 #include <asm/div64.h>
 
-#include <linux/soc/cirrus/ep93xx.h>	/* for ep93xx_pwm_{acquire,release}_gpio() */
-
 #define EP93XX_PWMx_TERM_COUNT	0x00
 #define EP93XX_PWMx_DUTY_CYCLE	0x04
 #define EP93XX_PWMx_ENABLE	0x08
@@ -45,20 +43,6 @@ static inline struct ep93xx_pwm *to_ep93xx_pwm(struct pwm_chip *chip)
 	return container_of(chip, struct ep93xx_pwm, chip);
 }
 
-static int ep93xx_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
-{
-	struct platform_device *pdev = to_platform_device(chip->dev);
-
-	return ep93xx_pwm_acquire_gpio(pdev);
-}
-
-static void ep93xx_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
-{
-	struct platform_device *pdev = to_platform_device(chip->dev);
-
-	ep93xx_pwm_release_gpio(pdev);
-}
-
 static int ep93xx_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 			    const struct pwm_state *state)
 {
@@ -157,8 +141,6 @@ static int ep93xx_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 }
 
 static const struct pwm_ops ep93xx_pwm_ops = {
-	.request = ep93xx_pwm_request,
-	.free = ep93xx_pwm_free,
 	.apply = ep93xx_pwm_apply,
 };
 
diff --git a/include/linux/soc/cirrus/ep93xx.h b/include/linux/soc/cirrus/ep93xx.h
index ea2b2c1074e4..fc4a2f9d4729 100644
--- a/include/linux/soc/cirrus/ep93xx.h
+++ b/include/linux/soc/cirrus/ep93xx.h
@@ -37,8 +37,6 @@ struct ep93xx_regmap_adev {
 	container_of((_adev), struct ep93xx_regmap_adev, adev)
 
 #ifdef CONFIG_ARCH_EP93XX
-int ep93xx_pwm_acquire_gpio(struct platform_device *pdev);
-void ep93xx_pwm_release_gpio(struct platform_device *pdev);
 int ep93xx_ide_acquire_gpio(struct platform_device *pdev);
 void ep93xx_ide_release_gpio(struct platform_device *pdev);
 int ep93xx_i2s_acquire(void);
@@ -46,8 +44,6 @@ void ep93xx_i2s_release(void);
 unsigned int ep93xx_chip_revision(void);
 
 #else
-static inline int ep93xx_pwm_acquire_gpio(struct platform_device *pdev) { return 0; }
-static inline void ep93xx_pwm_release_gpio(struct platform_device *pdev) {}
 static inline int ep93xx_ide_acquire_gpio(struct platform_device *pdev) { return 0; }
 static inline void ep93xx_ide_release_gpio(struct platform_device *pdev) {}
 static inline int ep93xx_i2s_acquire(void) { return 0; }

-- 
2.41.0


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[PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Drop legacy acquire/release since we are using pinctrl for this now.

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 arch/arm/mach-ep93xx/core.c       | 72 ---------------------------------------
 drivers/ata/pata_ep93xx.c         | 29 +++++-----------
 include/linux/soc/cirrus/ep93xx.h |  4 ---
 3 files changed, 8 insertions(+), 97 deletions(-)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 4ddf1a4cba33..9c6154bb37b5 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -779,78 +779,6 @@ void __init ep93xx_register_ide(void)
 	platform_device_register(&ep93xx_ide_device);
 }
 
-int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
-{
-	int err;
-	int i;
-
-	err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
-	if (err)
-		return err;
-	err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
-	if (err)
-		goto fail_egpio15;
-	for (i = 2; i < 8; i++) {
-		err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
-		if (err)
-			goto fail_gpio_e;
-	}
-	for (i = 4; i < 8; i++) {
-		err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
-		if (err)
-			goto fail_gpio_g;
-	}
-	for (i = 0; i < 8; i++) {
-		err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
-		if (err)
-			goto fail_gpio_h;
-	}
-
-	/* GPIO ports E[7:2], G[7:4] and H used by IDE */
-	ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
-				 EP93XX_SYSCON_DEVCFG_GONIDE |
-				 EP93XX_SYSCON_DEVCFG_HONIDE);
-	return 0;
-
-fail_gpio_h:
-	for (--i; i >= 0; --i)
-		gpio_free(EP93XX_GPIO_LINE_H(i));
-	i = 8;
-fail_gpio_g:
-	for (--i; i >= 4; --i)
-		gpio_free(EP93XX_GPIO_LINE_G(i));
-	i = 8;
-fail_gpio_e:
-	for (--i; i >= 2; --i)
-		gpio_free(EP93XX_GPIO_LINE_E(i));
-	gpio_free(EP93XX_GPIO_LINE_EGPIO15);
-fail_egpio15:
-	gpio_free(EP93XX_GPIO_LINE_EGPIO2);
-	return err;
-}
-EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
-
-void ep93xx_ide_release_gpio(struct platform_device *pdev)
-{
-	int i;
-
-	for (i = 2; i < 8; i++)
-		gpio_free(EP93XX_GPIO_LINE_E(i));
-	for (i = 4; i < 8; i++)
-		gpio_free(EP93XX_GPIO_LINE_G(i));
-	for (i = 0; i < 8; i++)
-		gpio_free(EP93XX_GPIO_LINE_H(i));
-	gpio_free(EP93XX_GPIO_LINE_EGPIO15);
-	gpio_free(EP93XX_GPIO_LINE_EGPIO2);
-
-
-	/* GPIO ports E[7:2], G[7:4] and H used by GPIO */
-	ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
-			       EP93XX_SYSCON_DEVCFG_GONIDE |
-			       EP93XX_SYSCON_DEVCFG_HONIDE);
-}
-EXPORT_SYMBOL(ep93xx_ide_release_gpio);
-
 /*************************************************************************
  * EP93xx ADC
  *************************************************************************/
diff --git a/drivers/ata/pata_ep93xx.c b/drivers/ata/pata_ep93xx.c
index 3f33916c2d23..83c2a0162cb0 100644
--- a/drivers/ata/pata_ep93xx.c
+++ b/drivers/ata/pata_ep93xx.c
@@ -652,13 +652,13 @@ static int ep93xx_pata_dma_init(struct ep93xx_pata_data *drv_data)
 	 * start of new transfer.
 	 */
 	drv_data->dma_rx_channel = dma_request_chan(dev, "rx");
-	if (IS_ERR(drv_data->dma_rx_channel)) {
+	if (PTR_ERR_OR_ZERO(drv_data->dma_rx_channel)) {
 		ret = PTR_ERR(drv_data->dma_rx_channel);
 		return dev_err_probe(dev, ret, "rx DMA setup failed");
 	}
 
 	drv_data->dma_tx_channel = dma_request_chan(&pdev->dev, "tx");
-	if (IS_ERR(drv_data->dma_tx_channel)) {
+	if (PTR_ERR_OR_ZERO(drv_data->dma_tx_channel)) {
 		ret = PTR_ERR(drv_data->dma_tx_channel);
 		dev_err_probe(dev, ret, "tx DMA setup failed");
 		goto fail_release_rx;
@@ -923,28 +923,18 @@ static int ep93xx_pata_probe(struct platform_device *pdev)
 	void __iomem *ide_base;
 	int err;
 
-	err = ep93xx_ide_acquire_gpio(pdev);
-	if (err)
-		return err;
-
 	/* INT[3] (IRQ_EP93XX_EXT3) line connected as pull down */
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		err = irq;
-		goto err_rel_gpio;
-	}
+	if (irq < 0)
+		return irq;
 
 	ide_base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem_res);
-	if (IS_ERR(ide_base)) {
-		err = PTR_ERR(ide_base);
-		goto err_rel_gpio;
-	}
+	if (IS_ERR(ide_base))
+		return PTR_ERR(ide_base);
 
 	drv_data = devm_kzalloc(&pdev->dev, sizeof(*drv_data), GFP_KERNEL);
-	if (!drv_data) {
-		err = -ENOMEM;
-		goto err_rel_gpio;
-	}
+	if (!drv_data)
+		return -ENOMEM;
 
 	drv_data->pdev = pdev;
 	drv_data->ide_base = ide_base;
@@ -1003,8 +993,6 @@ static int ep93xx_pata_probe(struct platform_device *pdev)
 
 err_rel_dma:
 	ep93xx_pata_release_dma(drv_data);
-err_rel_gpio:
-	ep93xx_ide_release_gpio(pdev);
 	return err;
 }
 
@@ -1016,7 +1004,6 @@ static void ep93xx_pata_remove(struct platform_device *pdev)
 	ata_host_detach(host);
 	ep93xx_pata_release_dma(drv_data);
 	ep93xx_pata_clear_regs(drv_data->ide_base);
-	ep93xx_ide_release_gpio(pdev);
 }
 
 static const struct of_device_id ep93xx_pata_of_ids[] = {
diff --git a/include/linux/soc/cirrus/ep93xx.h b/include/linux/soc/cirrus/ep93xx.h
index fc4a2f9d4729..da8bdfc36526 100644
--- a/include/linux/soc/cirrus/ep93xx.h
+++ b/include/linux/soc/cirrus/ep93xx.h
@@ -37,15 +37,11 @@ struct ep93xx_regmap_adev {
 	container_of((_adev), struct ep93xx_regmap_adev, adev)
 
 #ifdef CONFIG_ARCH_EP93XX
-int ep93xx_ide_acquire_gpio(struct platform_device *pdev);
-void ep93xx_ide_release_gpio(struct platform_device *pdev);
 int ep93xx_i2s_acquire(void);
 void ep93xx_i2s_release(void);
 unsigned int ep93xx_chip_revision(void);
 
 #else
-static inline int ep93xx_ide_acquire_gpio(struct platform_device *pdev) { return 0; }
-static inline void ep93xx_ide_release_gpio(struct platform_device *pdev) {}
 static inline int ep93xx_i2s_acquire(void) { return 0; }
 static inline void ep93xx_i2s_release(void) {}
 static inline unsigned int ep93xx_chip_revision(void) { return 0; }

-- 
2.41.0


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Re: [PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

[Andy Shevchenko]

On Tue, Dec 12, 2023 at 11:20:53AM +0300, Nikita Shubin wrote:
> Drop legacy acquire/release since we are using pinctrl for this now.

...

> -	if (IS_ERR(drv_data->dma_rx_channel)) {
> +	if (PTR_ERR_OR_ZERO(drv_data->dma_rx_channel)) {

This seems incorrect.

>  		ret = PTR_ERR(drv_data->dma_rx_channel);
>  		return dev_err_probe(dev, ret, "rx DMA setup failed");

		return dev_err_probe(...);

>  	}

I think you wanted

	ret = PTR_ERR_OR_ZERO(drv_data->dma_rx_channel);
	if (ret)
		return dev_err_probe(dev, ret, "rx DMA setup failed");

...

>  	drv_data->dma_tx_channel = dma_request_chan(&pdev->dev, "tx");
> -	if (IS_ERR(drv_data->dma_tx_channel)) {
> +	if (PTR_ERR_OR_ZERO(drv_data->dma_tx_channel)) {
>  		ret = PTR_ERR(drv_data->dma_tx_channel);
>  		dev_err_probe(dev, ret, "tx DMA setup failed");
>  		goto fail_release_rx;

Ditto.

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With Best Regards,
Andy Shevchenko



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Re: [PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

[Uwe Kleine-König]

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On Wed, Dec 13, 2023 at 08:16:26PM +0200, Andy Shevchenko wrote:
> On Tue, Dec 12, 2023 at 11:20:53AM +0300, Nikita Shubin wrote:
> > Drop legacy acquire/release since we are using pinctrl for this now.
> 
> ...
> 
> > -	if (IS_ERR(drv_data->dma_rx_channel)) {
> > +	if (PTR_ERR_OR_ZERO(drv_data->dma_rx_channel)) {
> 
> This seems incorrect.
> 
> >  		ret = PTR_ERR(drv_data->dma_rx_channel);
> >  		return dev_err_probe(dev, ret, "rx DMA setup failed");
> 
> 		return dev_err_probe(...);
> 
> >  	}
> 
> I think you wanted
> 
> 	ret = PTR_ERR_OR_ZERO(drv_data->dma_rx_channel);
> 	if (ret)
> 		return dev_err_probe(dev, ret, "rx DMA setup failed");

How is that different from

	if (IS_ERR(drv_data->dma_rx_channel))
		return dev_err_probe(dev, PTR_ERR(drv_data->dma_rx_channel), "....");

(which seems to be more idiomatic to me)? While I was involved in
creating PTR_ERR_OR_ZERO, I don't particularily like it (today).

Also note that you want a \n at the end of error messages.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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Re: [PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

[Andy Shevchenko]

On Wed, Dec 13, 2023 at 07:33:49PM +0100, Uwe Kleine-König wrote:
> On Wed, Dec 13, 2023 at 08:16:26PM +0200, Andy Shevchenko wrote:
> > On Tue, Dec 12, 2023 at 11:20:53AM +0300, Nikita Shubin wrote:
> > > Drop legacy acquire/release since we are using pinctrl for this now.

...

> > > -	if (IS_ERR(drv_data->dma_rx_channel)) {
> > > +	if (PTR_ERR_OR_ZERO(drv_data->dma_rx_channel)) {
> > 
> > This seems incorrect.
> > 
> > >  		ret = PTR_ERR(drv_data->dma_rx_channel);
> > >  		return dev_err_probe(dev, ret, "rx DMA setup failed");
> > 
> > 		return dev_err_probe(...);
> > 
> > >  	}
> > 
> > I think you wanted
> > 
> > 	ret = PTR_ERR_OR_ZERO(drv_data->dma_rx_channel);
> > 	if (ret)
> > 		return dev_err_probe(dev, ret, "rx DMA setup failed");
> 
> How is that different from
> 
> 	if (IS_ERR(drv_data->dma_rx_channel))
> 		return dev_err_probe(dev, PTR_ERR(drv_data->dma_rx_channel), "....");
> 
> (which seems to be more idiomatic to me)? While I was involved in
> creating PTR_ERR_OR_ZERO, I don't particularily like it (today).

Makes lines shorter, either works for me.

> Also note that you want a \n at the end of error messages.

Indeed.

-- 
With Best Regards,
Andy Shevchenko



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Re: [PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

[Uwe Kleine-König]

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On Wed, Dec 13, 2023 at 08:48:55PM +0200, Andy Shevchenko wrote:
> On Wed, Dec 13, 2023 at 07:33:49PM +0100, Uwe Kleine-König wrote:
> > On Wed, Dec 13, 2023 at 08:16:26PM +0200, Andy Shevchenko wrote:
> > > On Tue, Dec 12, 2023 at 11:20:53AM +0300, Nikita Shubin wrote:
> > > > Drop legacy acquire/release since we are using pinctrl for this now.
> 
> ...
> 
> > > I think you wanted
> > > 
> > > 	ret = PTR_ERR_OR_ZERO(drv_data->dma_rx_channel);
> > > 	if (ret)
> > > 		return dev_err_probe(dev, ret, "rx DMA setup failed");
> > 
> > How is that different from
> > 
> > 	if (IS_ERR(drv_data->dma_rx_channel))
> > 		return dev_err_probe(dev, PTR_ERR(drv_data->dma_rx_channel), "....");
> > 
> > (which seems to be more idiomatic to me)? While I was involved in
> > creating PTR_ERR_OR_ZERO, I don't particularily like it (today).
> 
> Makes lines shorter, either works for me.

If you want shorter lines, I'd prefer

	if (IS_ERR(drv_data->dma_rx_channel)) {
		ret = PTR_ERR(drv_data->dma_rx_channel);
		return dev_err_probe(dev, ret, "...\n");
	}

over
	ret = PTR_ERR_OR_ZERO(drv_data->dma_rx_channel);
	if (ret)
		return dev_err_probe(dev, ret, "\n");

even though it's one line longer because the if body needs curly braces.
I think it's easier to parse for a human which IMHO matters more than
the additional line. But I'm aware that might be subjective.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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