lkml.org 
[lkml]   [2022]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH v3] PCI: mvebu: switch to using gpiod API
This patch switches the driver away from legacy gpio/of_gpio API to
gpiod API, and removes use of of_get_named_gpio_flags() which I want to
make private to gpiolib.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

v3:
- add #include <linux/irqchip/chained_irq.h> to avoid compile errors.
This was previously included indirectly via linux/of_gpio.h ->
linux/gpio/driver.h

v2:
- free port->reset_name when reset GPIO is not found (Pali)
- remove stray tab (Pali)

This is the last user of of_get_named_gpio_flags() in the "next" tree.

Thanks!

drivers/pci/controller/pci-mvebu.c | 51 ++++++++++--------------------
1 file changed, 17 insertions(+), 34 deletions(-)

diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index 73db99035c2b..600964ba174c 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -11,15 +11,15 @@
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/irqdomain.h>
+#include <linux/irqchip/chained_irq.h>
#include <linux/mbus.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
-#include <linux/of_gpio.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>

@@ -1262,9 +1262,8 @@ static int mvebu_pcie_parse_port(struct mvebu_pcie *pcie,
struct mvebu_pcie_port *port, struct device_node *child)
{
struct device *dev = &pcie->pdev->dev;
- enum of_gpio_flags flags;
u32 slot_power_limit;
- int reset_gpio, ret;
+ int ret;
u32 num_lanes;

port->pcie = pcie;
@@ -1328,40 +1327,24 @@ static int mvebu_pcie_parse_port(struct mvebu_pcie *pcie,
port->name, child);
}

- reset_gpio = of_get_named_gpio_flags(child, "reset-gpios", 0, &flags);
- if (reset_gpio == -EPROBE_DEFER) {
- ret = reset_gpio;
+ port->reset_name = devm_kasprintf(dev, GFP_KERNEL, "%s-reset",
+ port->name);
+ if (!port->reset_name) {
+ ret = -ENOMEM;
goto err;
}

- if (gpio_is_valid(reset_gpio)) {
- unsigned long gpio_flags;
-
- port->reset_name = devm_kasprintf(dev, GFP_KERNEL, "%s-reset",
- port->name);
- if (!port->reset_name) {
- ret = -ENOMEM;
+ port->reset_gpio = devm_fwnode_gpiod_get(dev, of_fwnode_handle(child),
+ "reset", GPIOD_OUT_HIGH,
+ port->name);
+ ret = PTR_ERR_OR_ZERO(port->reset_gpio);
+ if (ret) {
+ if (ret != -ENOENT)
goto err;
- }
-
- if (flags & OF_GPIO_ACTIVE_LOW) {
- dev_info(dev, "%pOF: reset gpio is active low\n",
- child);
- gpio_flags = GPIOF_ACTIVE_LOW |
- GPIOF_OUT_INIT_LOW;
- } else {
- gpio_flags = GPIOF_OUT_INIT_HIGH;
- }
-
- ret = devm_gpio_request_one(dev, reset_gpio, gpio_flags,
- port->reset_name);
- if (ret) {
- if (ret == -EPROBE_DEFER)
- goto err;
- goto skip;
- }
-
- port->reset_gpio = gpio_to_desc(reset_gpio);
+ /* reset gpio is optional */
+ port->reset_gpio = NULL;
+ devm_kfree(dev, port->reset_name);
+ port->reset_name = NULL;
}

slot_power_limit = of_pci_get_slot_power_limit(child,
--
2.39.0.rc0.267.gcb52ba06e7-goog

--
Dmitry

\
 
 \ /
  Last update: 2022-12-07 22:07    [W:0.044 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site