lkml.org 
[lkml]   [2018]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 03/21] regulator: gpio: Get enable GPIO using GPIO descriptor
Date
We augment the GPIO regulator to get the *enable* regulator
GPIO line (not the other lines) using a descriptor rather than
a global number.

We then pass this into the regulator core which has been
prepared to hande enable descriptors in a separate patch.

Switch over the two boardfiles using this facility and clean
up so we only pass descriptors around.

Cc: Philipp Zabel <philipp.zabel@gmail.com> # HX4700/Magician maintainer
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
arch/arm/mach-pxa/hx4700.c | 12 +++++++++++-
arch/arm/mach-pxa/magician.c | 11 ++++++++++-
drivers/regulator/gpio-regulator.c | 23 +++++++++++------------
include/linux/regulator/gpio-regulator.h | 3 ---
4 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index e2e7f247a645..6717a10180eb 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/input/navpoint.h>
@@ -711,7 +712,6 @@ static struct gpio_regulator_state bq24022_states[] = {
static struct gpio_regulator_config bq24022_info = {
.supply_name = "bq24022",

- .enable_gpio = GPIO72_HX4700_BQ24022_nCHARGE_EN,
.enable_high = 0,
.enabled_at_boot = 0,

@@ -733,6 +733,15 @@ static struct platform_device bq24022 = {
},
};

+static struct gpiod_lookup_table bq24022_gpiod_table = {
+ .dev_id = "gpio-regulator",
+ .table = {
+ GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
+ "enable", GPIO_ACTIVE_HIGH),
+ { },
+ },
+};
+
/*
* StrataFlash
*/
@@ -875,6 +884,7 @@ static void __init hx4700_init(void)
pxa_set_btuart_info(NULL);
pxa_set_stuart_info(NULL);

+ gpiod_add_lookup_table(&bq24022_gpiod_table);
platform_add_devices(devices, ARRAY_SIZE(devices));
pwm_add_table(hx4700_pwm_lookup, ARRAY_SIZE(hx4700_pwm_lookup));

diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 14c0f80bc9e7..9a5bda3ea194 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -657,7 +657,6 @@ static struct gpio_regulator_state bq24022_states[] = {
static struct gpio_regulator_config bq24022_info = {
.supply_name = "bq24022",

- .enable_gpio = GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
.enable_high = 0,
.enabled_at_boot = 1,

@@ -679,6 +678,15 @@ static struct platform_device bq24022 = {
},
};

+static struct gpiod_lookup_table bq24022_gpiod_table = {
+ .dev_id = "gpio-regulator",
+ .table = {
+ GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
+ "enable", GPIO_ACTIVE_HIGH),
+ { },
+ },
+};
+
/*
* fixed regulator for ads7846
*/
@@ -1007,6 +1015,7 @@ static void __init magician_init(void)
regulator_register_always_on(0, "power", pwm_backlight_supply,
ARRAY_SIZE(pwm_backlight_supply), 5000000);

+ gpiod_add_lookup_table(&bq24022_gpiod_table);
platform_add_devices(ARRAY_AND_SIZE(devices));
}

diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 0fce06acfaec..172ca4c578b2 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -31,6 +31,7 @@
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/gpio-regulator.h>
#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
@@ -161,10 +162,6 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,

of_property_read_u32(np, "startup-delay-us", &config->startup_delay);

- config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
- if (config->enable_gpio < 0 && config->enable_gpio != -ENOENT)
- return ERR_PTR(config->enable_gpio);
-
/* Fetch GPIOs. - optional property*/
ret = of_gpio_count(np);
if ((ret < 0) && (ret != -ENOENT))
@@ -254,6 +251,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct gpio_regulator_data *drvdata;
struct regulator_config cfg = { };
+ enum gpiod_flags gflags;
int ptr, ret, state;

drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
@@ -340,21 +338,22 @@ static int gpio_regulator_probe(struct platform_device *pdev)
cfg.driver_data = drvdata;
cfg.of_node = np;

- if (gpio_is_valid(config->enable_gpio)) {
- cfg.ena_gpio = config->enable_gpio;
- cfg.ena_gpio_initialized = true;
- }
cfg.ena_gpio_invert = !config->enable_high;
if (config->enabled_at_boot) {
if (config->enable_high)
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+ gflags = GPIOD_OUT_HIGH;
else
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+ gflags = GPIOD_OUT_LOW;
} else {
if (config->enable_high)
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+ gflags = GPIOD_OUT_LOW;
else
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+ gflags = GPIOD_OUT_HIGH;
+ }
+ cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
+ if (IS_ERR(cfg.ena_gpiod)) {
+ ret = PTR_ERR(cfg.ena_gpiod);
+ goto err_stategpio;
}

drvdata->dev = regulator_register(&drvdata->desc, &cfg);
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 19fbd267406d..536cab86f2d5 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -44,8 +44,6 @@ struct gpio_regulator_state {
/**
* struct gpio_regulator_config - config structure
* @supply_name: Name of the regulator supply
- * @enable_gpio: GPIO to use for enable control
- * set to -EINVAL if not used
* @enable_high: Polarity of enable GPIO
* 1 = Active high, 0 = Active low
* @enabled_at_boot: Whether regulator has been enabled at
@@ -69,7 +67,6 @@ struct gpio_regulator_state {
struct gpio_regulator_config {
const char *supply_name;

- int enable_gpio;
unsigned enable_high:1;
unsigned enabled_at_boot:1;
unsigned startup_delay;
--
2.14.3
\
 
 \ /
  Last update: 2018-02-12 14:22    [W:0.144 / U:3.608 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site