Date:   Fri, 23 Sep 2022 23:04:29 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pcmcia: at91_cf: switch to using gpiod API

This patch switches the driver to use newer gpiod API instead of legacy
gpio API. This moves us closer to the goal of stopping exporting
OF-specific APIs of gpiolib.

While at it, stop using module-global for regmap.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/pcmcia/at91_cf.c | 116 ++++++++++++++++++++-------------------
 1 file changed, 60 insertions(+), 56 deletions(-)

diff --git a/drivers/pcmcia/at91_cf.c b/drivers/pcmcia/at91_cf.c
index 92df2c2c5d07..4ae790d00fd6 100644
--- a/drivers/pcmcia/at91_cf.c
+++ b/drivers/pcmcia/at91_cf.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2005 David Brownell
  */
 
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
@@ -12,14 +13,13 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/io.h>
 #include <linux/sizes.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/atmel-mc.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 #include <linux/pci.h>
 #include <linux/regmap.h>
 
@@ -36,18 +36,17 @@
 #define	CF_MEM_PHYS	(0x017ff800)
 
 struct at91_cf_data {
-	int	irq_pin;		/* I/O IRQ */
-	int	det_pin;		/* Card detect */
-	int	vcc_pin;		/* power switching */
-	int	rst_pin;		/* card reset */
+	struct gpio_desc *irq_pin;	/* I/O IRQ */
+	struct gpio_desc *det_pin;	/* Card detect */
+	struct gpio_desc *vcc_pin;	/* power switching */
+	struct gpio_desc *rst_pin;	/* card reset */
+	struct regmap *mc;
 	u8	chipselect;		/* EBI Chip Select number */
 	u8	flags;
 #define AT91_CF_TRUE_IDE	0x01
 #define AT91_IDE_SWAP_A0_A2	0x02
 };
 
-struct regmap *mc;
-
 /*--------------------------------------------------------------------------*/
 
 struct at91_cf_socket {
@@ -63,7 +62,7 @@ struct at91_cf_socket {
 
 static inline int at91_cf_present(struct at91_cf_socket *cf)
 {
-	return !gpio_get_value(cf->board->det_pin);
+	return gpiod_get_value(cf->board->det_pin);
 }
 
 /*--------------------------------------------------------------------------*/
@@ -77,7 +76,7 @@ static irqreturn_t at91_cf_irq(int irq, void *_cf)
 {
 	struct at91_cf_socket *cf = _cf;
 
-	if (irq == gpio_to_irq(cf->board->det_pin)) {
+	if (irq == gpiod_to_irq(cf->board->det_pin)) {
 		unsigned present = at91_cf_present(cf);
 
 		/* kick pccard as needed */
@@ -103,16 +102,15 @@ static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
 
 	/* NOTE: CF is always 3VCARD */
 	if (at91_cf_present(cf)) {
-		int rdy	= gpio_is_valid(cf->board->irq_pin);	/* RDY/nIRQ */
-		int vcc	= gpio_is_valid(cf->board->vcc_pin);
-
 		*sp = SS_DETECT | SS_3VCARD;
-		if (!rdy || gpio_get_value(cf->board->irq_pin))
+		/* RDY/nIRQ */
+		if (!cf->board->irq_pin || gpiod_get_value(cf->board->irq_pin))
 			*sp |= SS_READY;
-		if (!vcc || gpio_get_value(cf->board->vcc_pin))
+		if (!cf->board->vcc_pin || gpiod_get_value(cf->board->vcc_pin))
 			*sp |= SS_POWERON;
-	} else
+	} else {
 		*sp = 0;
+	}
 
 	return 0;
 }
@@ -125,13 +123,13 @@ at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
 	cf = container_of(sock, struct at91_cf_socket, socket);
 
 	/* switch Vcc if needed and possible */
-	if (gpio_is_valid(cf->board->vcc_pin)) {
+	if (cf->board->vcc_pin) {
 		switch (s->Vcc) {
 		case 0:
-			gpio_set_value(cf->board->vcc_pin, 0);
+			gpiod_set_value(cf->board->vcc_pin, 0);
 			break;
 		case 33:
-			gpio_set_value(cf->board->vcc_pin, 1);
+			gpiod_set_value(cf->board->vcc_pin, 1);
 			break;
 		default:
 			return -EINVAL;
@@ -139,7 +137,7 @@ at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
 	}
 
 	/* toggle reset if needed */
-	gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
+	gpiod_set_value(cf->board->rst_pin, s->flags & SS_RESET);
 
 	dev_dbg(&cf->pdev->dev, "Vcc %d, io_irq %d, flags %04x csc %04x\n",
 				s->Vcc, s->io_irq, s->flags, s->csc_mask);
@@ -180,7 +178,8 @@ static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
 		csr = AT91_MC_SMC_DBW_16;
 		dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
 	}
-	regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
+	regmap_update_bits(cf->board->mc,
+			   AT91_MC_SMC_CSR(cf->board->chipselect),
 			   AT91_MC_SMC_DBW, csr);
 
 	io->start = cf->socket.io_offset;
@@ -238,17 +237,9 @@ static int at91_cf_probe(struct platform_device *pdev)
 	if (!board)
 		return -ENOMEM;
 
-	board->irq_pin = of_get_gpio(pdev->dev.of_node, 0);
-	board->det_pin = of_get_gpio(pdev->dev.of_node, 1);
-	board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2);
-	board->rst_pin = of_get_gpio(pdev->dev.of_node, 3);
-
-	mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
-	if (IS_ERR(mc))
-		return PTR_ERR(mc);
-
-	if (!gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin))
-		return -ENODEV;
+	board->mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
+	if (IS_ERR(board->mc))
+		return PTR_ERR(board->mc);
 
 	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!io)
@@ -264,26 +255,34 @@ static int at91_cf_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, cf);
 
 	/* must be a GPIO; ergo must trigger on both edges */
-	status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det");
-	if (status < 0)
+	board->det_pin = devm_gpiod_get_index(&pdev->dev, NULL, 1, GPIOD_IN);
+	status = PTR_ERR_OR_ZERO(board->det_pin);
+	if (status)
 		return status;
 
-	status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin),
+	gpiod_set_consumer_name(board->det_pin, "cf_det");
+
+	status = devm_request_irq(&pdev->dev, gpiod_to_irq(board->det_pin),
 					at91_cf_irq, 0, "at91_cf detect", cf);
 	if (status < 0)
 		return status;
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst");
-	if (status < 0)
+	board->rst_pin = devm_gpiod_get_index(&pdev->dev, NULL, 3, GPIOD_ASIS);
+	status = PTR_ERR_OR_ZERO(board->rst_pin);
+	if (status)
 		goto fail0a;
 
-	if (gpio_is_valid(board->vcc_pin)) {
-		status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc");
-		if (status < 0)
-			goto fail0a;
-	}
+	gpiod_set_consumer_name(board->rst_pin, "cf_rst");
+
+	board->vcc_pin = devm_gpiod_get_index_optional(&pdev->dev,
+						      NULL, 2, GPIOD_ASIS);
+	status = PTR_ERR_OR_ZERO(board->rst_pin);
+	if (status)
+		goto fail0a;
+
+	gpiod_set_consumer_name(board->vcc_pin, "cf_vcc");
 
 	/*
 	 * The card driver will request this irq later as needed.
@@ -291,18 +290,23 @@ static int at91_cf_probe(struct platform_device *pdev)
 	 * unless we report that we handle everything (sigh).
 	 * (Note:  DK board doesn't wire the IRQ pin...)
 	 */
-	if (gpio_is_valid(board->irq_pin)) {
-		status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq");
-		if (status < 0)
-			goto fail0a;
+	board->irq_pin = devm_gpiod_get_index_optional(&pdev->dev,
+						      NULL, 0, GPIOD_IN);
+	status = PTR_ERR_OR_ZERO(board->irq_pin);
+	if (status)
+		goto fail0a;
 
-		status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin),
+	if (board->irq_pin) {
+		gpiod_set_consumer_name(board->irq_pin, "cf_irq");
+
+		status = devm_request_irq(&pdev->dev, gpiod_to_irq(board->irq_pin),
 					at91_cf_irq, IRQF_SHARED, "at91_cf", cf);
 		if (status < 0)
 			goto fail0a;
-		cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
-	} else
+		cf->socket.pci_irq = gpiod_to_irq(board->irq_pin);
+	} else {
 		cf->socket.pci_irq = nr_irqs + 1;
+	}
 
 	/*
 	 * pcmcia layer only remaps "real" memory not iospace
@@ -322,7 +326,7 @@ static int at91_cf_probe(struct platform_device *pdev)
 	}
 
 	dev_info(&pdev->dev, "irqs det #%d, io #%d\n",
-		gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));
+		gpiod_to_irq(board->det_pin), gpiod_to_irq(board->irq_pin));
 
 	cf->socket.owner = THIS_MODULE;
 	cf->socket.dev.parent = &pdev->dev;
@@ -362,9 +366,9 @@ static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
 	struct at91_cf_data	*board = cf->board;
 
 	if (device_may_wakeup(&pdev->dev)) {
-		enable_irq_wake(gpio_to_irq(board->det_pin));
-		if (gpio_is_valid(board->irq_pin))
-			enable_irq_wake(gpio_to_irq(board->irq_pin));
+		enable_irq_wake(gpiod_to_irq(board->det_pin));
+		if (board->irq_pin)
+			enable_irq_wake(gpiod_to_irq(board->irq_pin));
 	}
 	return 0;
 }
@@ -375,9 +379,9 @@ static int at91_cf_resume(struct platform_device *pdev)
 	struct at91_cf_data	*board = cf->board;
 
 	if (device_may_wakeup(&pdev->dev)) {
-		disable_irq_wake(gpio_to_irq(board->det_pin));
-		if (gpio_is_valid(board->irq_pin))
-			disable_irq_wake(gpio_to_irq(board->irq_pin));
+		disable_irq_wake(gpiod_to_irq(board->det_pin));
+		if (board->irq_pin)
+			disable_irq_wake(gpiod_to_irq(board->irq_pin));
 	}
 
 	return 0;
-- 
2.30.2


-- 
Dmitry

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