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lib: utils/gpio: Generate FDT gpio driver list at compile-time

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Instead of having FDT gpio driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel 2022-05-13 09:27:12 +05:30 • committed by Anup Patel
parent 998ed43fde
commit 4eacd8229b
4 changed files with 17 additions and 10 deletions
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2
include/sbi_utils/gpio/fdt_gpio.h
View file

@ -12,6 +12,8 @@
#include <sbi_utils/gpio/gpio.h>
struct fdt_phandle_args;
/** FDT based GPIO driver */
struct fdt_gpio {
const struct fdt_match *match_table;

18
lib/utils/gpio/fdt_gpio.c
View file

@ -12,11 +12,9 @@
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/gpio/fdt_gpio.h>
extern struct fdt_gpio fdt_gpio_sifive;
static struct fdt_gpio *gpio_drivers[] = {
&fdt_gpio_sifive
};
/* List of FDT gpio drivers generated at compile time */
extern struct fdt_gpio *fdt_gpio_drivers[];
extern unsigned long fdt_gpio_drivers_size;
static struct fdt_gpio *fdt_gpio_driver(struct gpio_chip *chip)
{
@ -25,9 +23,9 @@ static struct fdt_gpio *fdt_gpio_driver(struct gpio_chip *chip)
if (!chip)
return NULL;
for (pos = 0; pos < array_size(gpio_drivers); pos++) {
if (chip->driver == gpio_drivers[pos])
return gpio_drivers[pos];
for (pos = 0; pos < fdt_gpio_drivers_size; pos++) {
if (chip->driver == fdt_gpio_drivers[pos])
return fdt_gpio_drivers[pos];
}
return NULL;
@ -49,8 +47,8 @@ static int fdt_gpio_init(void *fdt, u32 phandle)
return SBI_EINVAL;
/* Try all GPIO drivers one-by-one */
for (pos = 0; pos < array_size(gpio_drivers); pos++) {
drv = gpio_drivers[pos];
for (pos = 0; pos < fdt_gpio_drivers_size; pos++) {
drv = fdt_gpio_drivers[pos];
match = fdt_match_node(fdt, nodeoff, drv->match_table);
if (match && drv->init) {

3
lib/utils/gpio/fdt_gpio_drivers.carray Normal file
View file

@ -0,0 +1,3 @@
HEADER: sbi_utils/gpio/fdt_gpio.h
TYPE: struct fdt_gpio
NAME: fdt_gpio_drivers

4
lib/utils/gpio/objects.mk
View file

@ -8,5 +8,9 @@
#
libsbiutils-objs-y += gpio/fdt_gpio.o
libsbiutils-objs-y += gpio/fdt_gpio_drivers.o
carray-fdt_gpio_drivers-y += fdt_gpio_sifive
libsbiutils-objs-y += gpio/fdt_gpio_sifive.o
libsbiutils-objs-y += gpio/gpio.o