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USB: FHCI: Switch to GPIO descriptors

Browse source 
This driver for the PPC Freescale SoC is using device tree
accessors and imperative GPIO semantics control using the old
GPIO API, switch it over to use GPIO descriptors.

Cc: Li Yang <leoyang.li@nxp.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Zhao Qiang <qiang.zhao@freescale.com>
Cc: Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220831082932.488724-1-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij 2022-08-31 10:29:32 +02:00 committed by Greg Kroah-Hartman
parent 10174220f5
commit a4efdb8a42
3 changed files with 26 additions and 54 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

61
drivers/usb/host/fhci-hcd.c
View file

@ -25,8 +25,8 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <soc/fsl/qe/qe.h>
#include <asm/fsl_gtm.h>
#include "fhci.h"
@ -150,15 +150,15 @@ int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
u8 bits = 0;
/* check USBOE,if transmitting,exit */
if (!gpio_get_value(fhci->gpios[GPIO_USBOE]))
if (!gpiod_get_value(fhci->gpiods[GPIO_USBOE]))
return -1;
/* check USBRP */
if (gpio_get_value(fhci->gpios[GPIO_USBRP]))
if (gpiod_get_value(fhci->gpiods[GPIO_USBRP]))
bits |= 0x2;
/* check USBRN */
if (gpio_get_value(fhci->gpios[GPIO_USBRN]))
if (gpiod_get_value(fhci->gpiods[GPIO_USBRN]))
bits |= 0x1;
return bits;
@ -630,40 +630,23 @@ static int of_fhci_probe(struct platform_device *ofdev)
/* GPIOs and pins */
for (i = 0; i < NUM_GPIOS; i++) {
int gpio;
enum of_gpio_flags flags;
if (i < GPIO_SPEED)
fhci->gpiods[i] = devm_gpiod_get_index(dev,
NULL, i, GPIOD_IN);
gpio = of_get_gpio_flags(node, i, &flags);
fhci->gpios[i] = gpio;
fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
else
fhci->gpiods[i] = devm_gpiod_get_index_optional(dev,
NULL, i, GPIOD_OUT_LOW);
if (!gpio_is_valid(gpio)) {
if (i < GPIO_SPEED) {
dev_err(dev, "incorrect GPIO%d: %d\n",
i, gpio);
goto err_gpios;
} else {
dev_info(dev, "assuming board doesn't have "
"%s gpio\n", i == GPIO_SPEED ?
"speed" : "power");
continue;
}
}
ret = gpio_request(gpio, dev_name(dev));
if (ret) {
dev_err(dev, "failed to request gpio %d", i);
if (IS_ERR(fhci->gpiods[i])) {
dev_err(dev, "incorrect GPIO%d: %ld\n",
i, PTR_ERR(fhci->gpiods[i]));
goto err_gpios;
}
if (i >= GPIO_SPEED) {
ret = gpio_direction_output(gpio, 0);
if (ret) {
dev_err(dev, "failed to set gpio %d as "
"an output\n", i);
i++;
goto err_gpios;
}
if (!fhci->gpiods[i]) {
dev_info(dev, "assuming board doesn't have "
"%s gpio\n", i == GPIO_SPEED ?
"speed" : "power");
}
}
@ -766,10 +749,6 @@ static int of_fhci_probe(struct platform_device *ofdev)
while (--j >= 0)
qe_pin_free(fhci->pins[j]);
err_gpios:
while (--i >= 0) {
if (gpio_is_valid(fhci->gpios[i]))
gpio_free(fhci->gpios[i]);
}
cpm_muram_free(pram_addr);
err_pram:
iounmap(hcd->regs);
@ -782,18 +761,12 @@ static int fhci_remove(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct fhci_hcd *fhci = hcd_to_fhci(hcd);
int i;
int j;
usb_remove_hcd(hcd);
free_irq(fhci->timer->irq, hcd);
gtm_put_timer16(fhci->timer);
cpm_muram_free(cpm_muram_offset(fhci->pram));
for (i = 0; i < NUM_GPIOS; i++) {
if (!gpio_is_valid(fhci->gpios[i]))
continue;
gpio_free(fhci->gpios[i]);
}
for (j = 0; j < NUM_PINS; j++)
qe_pin_free(fhci->pins[j]);
fhci_dfs_destroy(fhci);

15
drivers/usb/host/fhci-hub.c
View file

@ -19,7 +19,7 @@
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <soc/fsl/qe/qe.h>
#include "fhci.h"
@ -38,13 +38,12 @@ static u8 root_hub_des[] = {
static void fhci_gpio_set_value(struct fhci_hcd *fhci, int gpio_nr, bool on)
{
int gpio = fhci->gpios[gpio_nr];
bool alow = fhci->alow_gpios[gpio_nr];
struct gpio_desc *gpiod = fhci->gpiods[gpio_nr];
if (!gpio_is_valid(gpio))
if (!gpiod)
return;
gpio_set_value(gpio, on ^ alow);
gpiod_set_value(gpiod, on);
mdelay(5);
}
@ -129,9 +128,9 @@ void fhci_io_port_generate_reset(struct fhci_hcd *fhci)
{
fhci_dbg(fhci, "-> %s\n", __func__);
gpio_direction_output(fhci->gpios[GPIO_USBOE], 0);
gpio_direction_output(fhci->gpios[GPIO_USBTP], 0);
gpio_direction_output(fhci->gpios[GPIO_USBTN], 0);
gpiod_direction_output(fhci->gpiods[GPIO_USBOE], 0);
gpiod_direction_output(fhci->gpiods[GPIO_USBTP], 0);
gpiod_direction_output(fhci->gpiods[GPIO_USBTN], 0);
mdelay(5);

4
drivers/usb/host/fhci.h
View file

@ -23,6 +23,7 @@
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/gpio/consumer.h>
#include <soc/fsl/qe/qe.h>
#include <soc/fsl/qe/immap_qe.h>
@ -242,8 +243,7 @@ struct fhci_hcd {
enum qe_clock fullspeed_clk;
enum qe_clock lowspeed_clk;
struct qe_pin *pins[NUM_PINS];
int gpios[NUM_GPIOS];
bool alow_gpios[NUM_GPIOS];
struct gpio_desc *gpiods[NUM_GPIOS];
struct qe_usb_ctlr __iomem *regs; /* I/O memory used to communicate */
struct fhci_pram __iomem *pram; /* Parameter RAM */