* [PATCH v2 1/2] gpio: rcar: Remove obsolete platform data support
2015-12-04 15:33 [PATCH v2 0/2] gpio: rcar: Miscellaneous updates Geert Uytterhoeven
@ 2015-12-04 15:33 ` Geert Uytterhoeven
2015-12-10 23:13 ` Linus Walleij
2015-12-04 15:33 ` [PATCH v2 2/2] gpio: rcar: Improve clock error handling and reporting Geert Uytterhoeven
2015-12-07 6:27 ` [PATCH v2 0/2] gpio: rcar: Miscellaneous updates Simon Horman
2 siblings, 1 reply; 6+ messages in thread
From: Geert Uytterhoeven @ 2015-12-04 15:33 UTC (permalink / raw)
To: Linus Walleij, Alexandre Courbot
Cc: Magnus Damm, linux-gpio, linux-sh, Geert Uytterhoeven
Since commit 4baadb9e05c68962 ("ARM: shmobile: r8a7778: remove obsolete
setup code"), Renesas R-Car SoCs are only supported in generic DT-only
ARM multi-platform builds. The driver doesn't need to use platform data
anymore, hence remove platform data configuration.
Make gpio_rcar_priv.has_both_edge_trigger a boolean for consistency with
gpio_rcar_info.has_both_edge_trigger.
Move gpio_rcar_priv.irq_parent down while we're at it, to prevent gaps
on 64-bit.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
Commit 4baadb9e05c68962 is in v4.4-rc1.
v2:
- Convert gpio_rcar_priv.has_both_edge_trigger from a bitfield to a
boolean.
---
drivers/gpio/gpio-rcar.c | 77 +++++++++++----------------------
include/linux/platform_data/gpio-rcar.h | 29 -------------
2 files changed, 26 insertions(+), 80 deletions(-)
delete mode 100644 include/linux/platform_data/gpio-rcar.h
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 3cbb25ecfc7a1b6a..1ed52fc026cb4dd2 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -25,7 +25,6 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
-#include <linux/platform_data/gpio-rcar.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/spinlock.h>
@@ -34,12 +33,12 @@
struct gpio_rcar_priv {
void __iomem *base;
spinlock_t lock;
- struct gpio_rcar_config config;
struct platform_device *pdev;
struct gpio_chip gpio_chip;
struct irq_chip irq_chip;
- unsigned int irq_parent;
struct clk *clk;
+ unsigned int irq_parent;
+ bool has_both_edge_trigger;
};
#define IOINTSEL 0x00 /* General IO/Interrupt Switching Register */
@@ -121,7 +120,7 @@ static void gpio_rcar_config_interrupt_input_mode(struct gpio_rcar_priv *p,
gpio_rcar_modify_bit(p, EDGLEVEL, hwirq, !level_trigger);
/* Select one edge or both edges in BOTHEDGE */
- if (p->config.has_both_edge_trigger)
+ if (p->has_both_edge_trigger)
gpio_rcar_modify_bit(p, BOTHEDGE, hwirq, both);
/* Select "Interrupt Input Mode" in IOINTSEL */
@@ -161,7 +160,7 @@ static int gpio_rcar_irq_set_type(struct irq_data *d, unsigned int type)
false);
break;
case IRQ_TYPE_EDGE_BOTH:
- if (!p->config.has_both_edge_trigger)
+ if (!p->has_both_edge_trigger)
return -EINVAL;
gpio_rcar_config_interrupt_input_mode(p, hwirq, true, false,
true);
@@ -355,39 +354,29 @@ static const struct of_device_id gpio_rcar_of_table[] = {
MODULE_DEVICE_TABLE(of, gpio_rcar_of_table);
-static int gpio_rcar_parse_pdata(struct gpio_rcar_priv *p)
+static int gpio_rcar_parse_dt(struct gpio_rcar_priv *p, unsigned int *npins)
{
- struct gpio_rcar_config *pdata = dev_get_platdata(&p->pdev->dev);
struct device_node *np = p->pdev->dev.of_node;
+ const struct of_device_id *match;
+ const struct gpio_rcar_info *info;
struct of_phandle_args args;
int ret;
- if (pdata) {
- p->config = *pdata;
- } else if (IS_ENABLED(CONFIG_OF) && np) {
- const struct of_device_id *match;
- const struct gpio_rcar_info *info;
+ match = of_match_node(gpio_rcar_of_table, np);
+ if (!match)
+ return -EINVAL;
- match = of_match_node(gpio_rcar_of_table, np);
- if (!match)
- return -EINVAL;
+ info = match->data;
- info = match->data;
+ ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &args);
+ *npins = ret == 0 ? args.args[2] : RCAR_MAX_GPIO_PER_BANK;
+ p->has_both_edge_trigger = info->has_both_edge_trigger;
- ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0,
- &args);
- p->config.number_of_pins = ret == 0 ? args.args[2]
- : RCAR_MAX_GPIO_PER_BANK;
- p->config.gpio_base = -1;
- p->config.has_both_edge_trigger = info->has_both_edge_trigger;
- }
-
- if (p->config.number_of_pins == 0 ||
- p->config.number_of_pins > RCAR_MAX_GPIO_PER_BANK) {
+ if (*npins == 0 || *npins > RCAR_MAX_GPIO_PER_BANK) {
dev_warn(&p->pdev->dev,
- "Invalid number of gpio lines %u, using %u\n",
- p->config.number_of_pins, RCAR_MAX_GPIO_PER_BANK);
- p->config.number_of_pins = RCAR_MAX_GPIO_PER_BANK;
+ "Invalid number of gpio lines %u, using %u\n", *npins,
+ RCAR_MAX_GPIO_PER_BANK);
+ *npins = RCAR_MAX_GPIO_PER_BANK;
}
return 0;
@@ -401,6 +390,7 @@ static int gpio_rcar_probe(struct platform_device *pdev)
struct irq_chip *irq_chip;
struct device *dev = &pdev->dev;
const char *name = dev_name(dev);
+ unsigned int npins;
int ret;
p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
@@ -410,8 +400,8 @@ static int gpio_rcar_probe(struct platform_device *pdev)
p->pdev = pdev;
spin_lock_init(&p->lock);
- /* Get device configuration from DT node or platform data. */
- ret = gpio_rcar_parse_pdata(p);
+ /* Get device configuration from DT node */
+ ret = gpio_rcar_parse_dt(p, &npins);
if (ret < 0)
return ret;
@@ -451,8 +441,8 @@ static int gpio_rcar_probe(struct platform_device *pdev)
gpio_chip->label = name;
gpio_chip->parent = dev;
gpio_chip->owner = THIS_MODULE;
- gpio_chip->base = p->config.gpio_base;
- gpio_chip->ngpio = p->config.number_of_pins;
+ gpio_chip->base = -1;
+ gpio_chip->ngpio = npins;
irq_chip = &p->irq_chip;
irq_chip->name = name;
@@ -468,8 +458,8 @@ static int gpio_rcar_probe(struct platform_device *pdev)
goto err0;
}
- ret = gpiochip_irqchip_add(gpio_chip, irq_chip, p->config.irq_base,
- handle_level_irq, IRQ_TYPE_NONE);
+ ret = gpiochip_irqchip_add(gpio_chip, irq_chip, 0, handle_level_irq,
+ IRQ_TYPE_NONE);
if (ret) {
dev_err(dev, "cannot add irqchip\n");
goto err1;
@@ -483,22 +473,7 @@ static int gpio_rcar_probe(struct platform_device *pdev)
goto err1;
}
- dev_info(dev, "driving %d GPIOs\n", p->config.number_of_pins);
-
- /* warn in case of mismatch if irq base is specified */
- if (p->config.irq_base) {
- ret = irq_find_mapping(gpio_chip->irqdomain, 0);
- if (p->config.irq_base != ret)
- dev_warn(dev, "irq base mismatch (%u/%u)\n",
- p->config.irq_base, ret);
- }
-
- if (p->config.pctl_name) {
- ret = gpiochip_add_pin_range(gpio_chip, p->config.pctl_name, 0,
- gpio_chip->base, gpio_chip->ngpio);
- if (ret < 0)
- dev_warn(dev, "failed to add pin range\n");
- }
+ dev_info(dev, "driving %d GPIOs\n", npins);
return 0;
diff --git a/include/linux/platform_data/gpio-rcar.h b/include/linux/platform_data/gpio-rcar.h
deleted file mode 100644
index 2d8d6943281376a7..0000000000000000
--- a/include/linux/platform_data/gpio-rcar.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Renesas R-Car GPIO Support
- *
- * Copyright (C) 2013 Magnus Damm
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#ifndef __GPIO_RCAR_H__
-#define __GPIO_RCAR_H__
-
-struct gpio_rcar_config {
- int gpio_base;
- unsigned int irq_base;
- unsigned int number_of_pins;
- const char *pctl_name;
- unsigned has_both_edge_trigger:1;
-};
-
-#define RCAR_GP_PIN(bank, pin) (((bank) * 32) + (pin))
-
-#endif /* __GPIO_RCAR_H__ */
--
1.9.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v2 2/2] gpio: rcar: Improve clock error handling and reporting
2015-12-04 15:33 [PATCH v2 0/2] gpio: rcar: Miscellaneous updates Geert Uytterhoeven
2015-12-04 15:33 ` [PATCH v2 1/2] gpio: rcar: Remove obsolete platform data support Geert Uytterhoeven
@ 2015-12-04 15:33 ` Geert Uytterhoeven
2015-12-10 23:14 ` Linus Walleij
2015-12-07 6:27 ` [PATCH v2 0/2] gpio: rcar: Miscellaneous updates Simon Horman
2 siblings, 1 reply; 6+ messages in thread
From: Geert Uytterhoeven @ 2015-12-04 15:33 UTC (permalink / raw)
To: Linus Walleij, Alexandre Courbot
Cc: Magnus Damm, linux-gpio, linux-sh, Geert Uytterhoeven
If the Renesas R-Car GPIO driver cannot find a functional clock, it
prints a warning, .e.g.
gpio_rcar ffc40000.gpio: unable to get clock
and continues, as the clock is optional, depending on the SoC type.
This warning may confuse users.
To fix this, add a flag to indicate that the clock is mandatory or
optional:
- If the clock is mandatory (on R-Car Gen2 and Gen3), a missing clock
is now treated as a fatal error,
- If the clock is optional (on R-Car Gen1), the warning is no longer
printed.
Suggested-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
- Use booleans instead of bitfields,
- Add reference to R-Car Gen3.
---
drivers/gpio/gpio-rcar.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 1ed52fc026cb4dd2..624a435e69889d7e 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -39,6 +39,7 @@ struct gpio_rcar_priv {
struct clk *clk;
unsigned int irq_parent;
bool has_both_edge_trigger;
+ bool needs_clk;
};
#define IOINTSEL 0x00 /* General IO/Interrupt Switching Register */
@@ -317,14 +318,17 @@ static int gpio_rcar_direction_output(struct gpio_chip *chip, unsigned offset,
struct gpio_rcar_info {
bool has_both_edge_trigger;
+ bool needs_clk;
};
static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
.has_both_edge_trigger = false,
+ .needs_clk = false,
};
static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
.has_both_edge_trigger = true,
+ .needs_clk = true,
};
static const struct of_device_id gpio_rcar_of_table[] = {
@@ -371,6 +375,7 @@ static int gpio_rcar_parse_dt(struct gpio_rcar_priv *p, unsigned int *npins)
ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &args);
*npins = ret == 0 ? args.args[2] : RCAR_MAX_GPIO_PER_BANK;
p->has_both_edge_trigger = info->has_both_edge_trigger;
+ p->needs_clk = info->needs_clk;
if (*npins == 0 || *npins > RCAR_MAX_GPIO_PER_BANK) {
dev_warn(&p->pdev->dev,
@@ -409,7 +414,11 @@ static int gpio_rcar_probe(struct platform_device *pdev)
p->clk = devm_clk_get(dev, NULL);
if (IS_ERR(p->clk)) {
- dev_warn(dev, "unable to get clock\n");
+ if (p->needs_clk) {
+ dev_err(dev, "unable to get clock\n");
+ ret = PTR_ERR(p->clk);
+ goto err0;
+ }
p->clk = NULL;
}
--
1.9.1
^ permalink raw reply related [flat|nested] 6+ messages in thread