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spi: Add support for SPL_OF_PLATDATA to mxs_gpio.c driver

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After this patch the mxs_gpio.c DM/DTS driver can be used at early SPL to
read states of gpio pins (and for example alter the boot flow).

It was necessary to adjust its name to 'fsl_imx_2{38}_gpio' to match
requirements for SPL_OF_PLATDATA usage.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Lukasz Majewski 2019-09-05 09:55:01 +02:00 committed by Stefano Babic
parent cf31914cf2
commit c883d6a0f4
1 changed files with 55 additions and 17 deletions
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72
drivers/gpio/mxs_gpio.c
View file

@ -131,9 +131,16 @@ int name_to_gpio(const char *name)
#else /* CONFIG_DM_GPIO */
#include <dm.h>
#include <asm/gpio.h>
#include <dt-structs.h>
#include <asm/arch/gpio.h>
#define MXS_MAX_GPIO_PER_BANK 32
#ifdef CONFIG_MX28
#define dtd_fsl_imx_gpio dtd_fsl_imx28_gpio
#else /* CONFIG_MX23 */
#define dtd_fsl_imx_gpio dtd_fsl_imx23_gpio
#endif
DECLARE_GLOBAL_DATA_PTR;
/*
* According to i.MX28 Reference Manual:
@ -146,6 +153,14 @@ DECLARE_GLOBAL_DATA_PTR;
* Bank 4: 0-20 -> 21 PINS
*/
struct mxs_gpio_platdata {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_fsl_imx_gpio dtplat;
#endif
unsigned int bank;
int gpio_ranges;
};
struct mxs_gpio_priv {
unsigned int bank;
};
@ -223,22 +238,19 @@ static const struct dm_gpio_ops gpio_mxs_ops = {
static int mxs_gpio_probe(struct udevice *dev)
{
struct mxs_gpio_platdata *plat = dev_get_platdata(dev);
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct fdtdec_phandle_args args;
int node = dev_of_offset(dev);
char name[16], *str;
fdt_addr_t addr;
int ret;
addr = devfdt_get_addr(dev);
if (addr == FDT_ADDR_T_NONE) {
printf("%s: No 'reg' property defined!\n", __func__);
return -EINVAL;
}
priv->bank = (unsigned int)addr;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_fsl_imx_gpio *dtplat = &plat->dtplat;
priv->bank = (unsigned int)dtplat->reg[0];
uc_priv->gpio_count = dtplat->gpio_ranges[3];
#else
priv->bank = (unsigned int)plat->bank;
uc_priv->gpio_count = plat->gpio_ranges;
#endif
snprintf(name, sizeof(name), "GPIO%d_", priv->bank);
str = strdup(name);
if (!str)
@ -246,16 +258,33 @@ static int mxs_gpio_probe(struct udevice *dev)
uc_priv->bank_name = str;
debug("%s: %s: %d pins base: 0x%x\n", __func__, uc_priv->bank_name,
uc_priv->gpio_count, priv->bank);
return 0;
}
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
static int mxs_ofdata_to_platdata(struct udevice *dev)
{
struct mxs_gpio_platdata *plat = dev->platdata;
struct fdtdec_phandle_args args;
int node = dev_of_offset(dev);
int ret;
plat->bank = devfdt_get_addr(dev);
if (plat->bank == FDT_ADDR_T_NONE) {
printf("%s: No 'reg' property defined!\n", __func__);
return -EINVAL;
}
ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
NULL, 3, 0, &args);
if (ret)
printf("%s: 'gpio-ranges' not defined - using default!\n",
__func__);
uc_priv->gpio_count = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
debug("%s: %s: %d pins\n", __func__, uc_priv->bank_name,
uc_priv->gpio_count);
plat->gpio_ranges = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
return 0;
}
@ -265,13 +294,22 @@ static const struct udevice_id mxs_gpio_ids[] = {
{ .compatible = "fsl,imx28-gpio" },
{ }
};
#endif
U_BOOT_DRIVER(gpio_mxs) = {
.name = "gpio_mxs",
#ifdef CONFIG_MX28
.name = "fsl_imx28_gpio",
#else /* CONFIG_MX23 */
.name = "fsl_imx23_gpio",
#endif
.id = UCLASS_GPIO,
.ops = &gpio_mxs_ops,
.probe = mxs_gpio_probe,
.priv_auto_alloc_size = sizeof(struct mxs_gpio_priv),
.platdata_auto_alloc_size = sizeof(struct mxs_gpio_platdata),
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.of_match = mxs_gpio_ids,
.ofdata_to_platdata = mxs_ofdata_to_platdata,
#endif
};
#endif /* CONFIG_DM_GPIO */