[PATCH v2 4/4] PCI: kirin: Convert to agnostic GPIO API

Andy Shevchenko
2024-04-23T17:22:21Z

The of_gpio.h is going to be removed. In preparation of that convert
the driver to the agnostic API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
drivers/pci/controller/dwc/pcie-kirin.c | 105 ++++++++----------------
1 file changed, 35 insertions(+), 70 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index d5523f302102..1753ab63a541 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -12,12 +12,10 @@
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/err.h>
-#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
-#include <linux/of_gpio.h>
#include <linux/of_pci.h>
#include <linux/phy/phy.h>
#include <linux/pci.h>
@@ -78,16 +76,16 @@ struct kirin_pcie {
void *phy_priv; /* only for PCIE_KIRIN_INTERNAL_PHY */

/* DWC PERST# */
- int gpio_id_dwc_perst;
+ struct gpio_desc *id_dwc_perst_gpio;

/* Per-slot PERST# */
int num_slots;
- int gpio_id_reset[MAX_PCI_SLOTS];
+ struct gpio_desc *id_reset_gpio[MAX_PCI_SLOTS];
const char *reset_names[MAX_PCI_SLOTS];

/* Per-slot clkreq */
int n_gpio_clkreq;
- int gpio_id_clkreq[MAX_PCI_SLOTS];
+ struct gpio_desc *id_clkreq_gpio[MAX_PCI_SLOTS];
const char *clkreq_names[MAX_PCI_SLOTS];
};

@@ -381,15 +379,20 @@ static int kirin_pcie_get_gpio_enable(struct kirin_pcie *pcie,
pcie->n_gpio_clkreq = ret;

for (i = 0; i < pcie->n_gpio_clkreq; i++) {
- pcie->gpio_id_clkreq[i] = of_get_named_gpio(dev->of_node,
- "hisilicon,clken-gpios", i);
- if (pcie->gpio_id_clkreq[i] < 0)
- return pcie->gpio_id_clkreq[i];
+ pcie->id_clkreq_gpio[i] = devm_gpiod_get_index(dev,
+ "hisilicon,clken", i,
+ GPIOD_ASIS);
+ if (IS_ERR(pcie->id_clkreq_gpio[i]))
+ return dev_err_probe(dev, PTR_ERR(pcie->id_clkreq_gpio[i]),
+ "unable to get a valid clken gpio\n");

pcie->clkreq_names[i] = devm_kasprintf(dev, GFP_KERNEL,
"pcie_clkreq_%d", i);
if (!pcie->clkreq_names[i])
return -ENOMEM;
+
+ gpiod_set_consumer_name(pcie->id_clkreq_gpio[i],
+ pcie->clkreq_names[i]);
}

return 0;
@@ -407,10 +410,16 @@ static int kirin_pcie_parse_port(struct kirin_pcie *pcie,
for_each_available_child_of_node(parent, child) {
i = pcie->num_slots;

- pcie->gpio_id_reset[i] = of_get_named_gpio(child,
- "reset-gpios", 0);
- if (pcie->gpio_id_reset[i] < 0)
- continue;
+ pcie->id_reset_gpio[i] = devm_fwnode_gpiod_get_index(dev,
+ of_fwnode_handle(child),
+ "reset", 0, GPIOD_ASIS,
+ NULL);
+ if (IS_ERR(pcie->id_reset_gpio[i])) {
+ if (PTR_ERR(pcie->id_reset_gpio[i]) == -ENOENT)
+ continue;
+ return dev_err_probe(dev, PTR_ERR(pcie->id_reset_gpio[i]),
+ "unable to get a valid reset gpio\n");
+ }

pcie->num_slots++;
if (pcie->num_slots > MAX_PCI_SLOTS) {
@@ -434,6 +443,9 @@ static int kirin_pcie_parse_port(struct kirin_pcie *pcie,
ret = -ENOMEM;
goto put_node;
}
+
+ gpiod_set_consumer_name(pcie->id_reset_gpio[i],
+ pcie->reset_names[i]);
}
}

@@ -463,14 +475,11 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
return PTR_ERR(kirin_pcie->apb);

/* pcie internal PERST# gpio */
- kirin_pcie->gpio_id_dwc_perst = of_get_named_gpio(dev->of_node,
- "reset-gpios", 0);
- if (kirin_pcie->gpio_id_dwc_perst == -EPROBE_DEFER) {
- return -EPROBE_DEFER;
- } else if (!gpio_is_valid(kirin_pcie->gpio_id_dwc_perst)) {
- dev_err(dev, "unable to get a valid gpio pin\n");
- return -ENODEV;
- }
+ kirin_pcie->id_dwc_perst_gpio = devm_gpiod_get(dev, "reset", GPIOD_ASIS);
+ if (IS_ERR(kirin_pcie->id_dwc_perst_gpio))
+ return dev_err_probe(dev, PTR_ERR(kirin_pcie->id_dwc_perst_gpio),
+ "unable to get a valid gpio pin\n");
+ gpiod_set_consumer_name(kirin_pcie->id_dwc_perst_gpio, "pcie_perst_bridge");

ret = kirin_pcie_get_gpio_enable(kirin_pcie, pdev);
if (ret)
@@ -553,7 +562,7 @@ static int kirin_pcie_add_bus(struct pci_bus *bus)

/* Send PERST# to each slot */
for (i = 0; i < kirin_pcie->num_slots; i++) {
- ret = gpio_direction_output(kirin_pcie->gpio_id_reset[i], 1);
+ ret = gpiod_direction_output_raw(kirin_pcie->id_reset_gpio[i], 1);
if (ret) {
dev_err(pci->dev, "PERST# %s error: %d\n",
kirin_pcie->reset_names[i], ret);
@@ -623,44 +632,6 @@ static int kirin_pcie_host_init(struct dw_pcie_rp *pp)
return 0;
}

-static int kirin_pcie_gpio_request(struct kirin_pcie *kirin_pcie,
- struct device *dev)
-{
- int ret, i;
-
- for (i = 0; i < kirin_pcie->num_slots; i++) {
- if (!gpio_is_valid(kirin_pcie->gpio_id_reset[i])) {
- dev_err(dev, "unable to get a valid %s gpio\n",
- kirin_pcie->reset_names[i]);
- return -ENODEV;
- }
-
- ret = devm_gpio_request(dev, kirin_pcie->gpio_id_reset[i],
- kirin_pcie->reset_names[i]);
- if (ret)
- return ret;
- }
-
- for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++) {
- if (!gpio_is_valid(kirin_pcie->gpio_id_clkreq[i])) {
- dev_err(dev, "unable to get a valid %s gpio\n",
- kirin_pcie->clkreq_names[i]);
- return -ENODEV;
- }
-
- ret = devm_gpio_request(dev, kirin_pcie->gpio_id_clkreq[i],
- kirin_pcie->clkreq_names[i]);
- if (ret)
- return ret;
-
- ret = gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 0);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
static const struct dw_pcie_ops kirin_dw_pcie_ops = {
.read_dbi = kirin_pcie_read_dbi,
.write_dbi = kirin_pcie_write_dbi,
@@ -680,7 +651,7 @@ static int kirin_pcie_power_off(struct kirin_pcie *kirin_pcie)
return hi3660_pcie_phy_power_off(kirin_pcie);

for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++)
- gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 1);
+ gpiod_direction_output_raw(kirin_pcie->id_clkreq_gpio[i], 1);

phy_power_off(kirin_pcie->phy);
phy_exit(kirin_pcie->phy);
@@ -707,10 +678,6 @@ static int kirin_pcie_power_on(struct platform_device *pdev,
if (IS_ERR(kirin_pcie->phy))
return PTR_ERR(kirin_pcie->phy);

- ret = kirin_pcie_gpio_request(kirin_pcie, dev);
- if (ret)
- return ret;
-
ret = phy_init(kirin_pcie->phy);
if (ret)
goto err;
@@ -723,11 +690,9 @@ static int kirin_pcie_power_on(struct platform_device *pdev,
/* perst assert Endpoint */
usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX);

- if (!gpio_request(kirin_pcie->gpio_id_dwc_perst, "pcie_perst_bridge")) {
- ret = gpio_direction_output(kirin_pcie->gpio_id_dwc_perst, 1);
- if (ret)
- goto err;
- }
+ ret = gpiod_direction_output_raw(kirin_pcie->id_dwc_perst_gpio, 1);
+ if (ret)
+ goto err;

usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);

--
2.43.0.rc1.1336.g36b5255a03ac