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Signed-off-by: Gatien Chevallier --- drivers/pinctrl/stm32/pinctrl-stm32-hdp.c | 41 +++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c b/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c index 0b1dff01e04c..7e4aa0465c06 100644 --- a/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c @@ -4,6 +4,7 @@ * Author: Clément Le Goffic for STMicroelectronics. */ #include +#include #include #include #include @@ -605,10 +606,50 @@ MODULE_DEVICE_TABLE(of, stm32_hdp_of_match); static int stm32_hdp_probe(struct platform_device *pdev) { struct gpio_generic_chip_config config; + struct stm32_firewall *firewall = NULL; struct device *dev = &pdev->dev; struct stm32_hdp *hdp; + int nb_firewall; u8 version; int err; + int i; + + nb_firewall = of_count_phandle_with_args(pdev->dev.of_node, "access-controllers", + "#access-controller-cells"); + if (IS_ENABLED(CONFIG_STM32_FIREWALL) && nb_firewall != -ENOENT) { + if (nb_firewall <= 0) + return -EINVAL; + + firewall = devm_kcalloc(dev, nb_firewall, sizeof(*firewall), GFP_KERNEL); + if (!firewall) + return -ENOMEM; + + /* Get stm32 firewall information */ + err = stm32_firewall_get_firewall(dev->of_node, firewall, nb_firewall); + if (err) + return dev_err_probe(dev, err, "Failed to get firewall controller\n"); + + for (i = 0; i < nb_firewall; i++) { + err = stm32_firewall_grant_access_by_id(firewall + i, + firewall[i].firewall_id); + if (err) { + while (i) { + u32 id; + + i--; + id = firewall[i].firewall_id; + stm32_firewall_release_access_by_id(firewall + i, id); + } + if (err == -EACCES) { + dev_info(dev, "No firewall access\n"); + return -ENODEV; + } + + return dev_err_probe(dev, err, "Error checking firewall access\n"); + } + } + } + hdp = devm_kzalloc(dev, sizeof(*hdp), GFP_KERNEL); if (!hdp) -- 2.43.0