diff options
| author | Gatien Chevallier <gatien.chevallier@foss.st.com> | 2026-02-26 13:30:27 +0300 |
|---|---|---|
| committer | Alexandre Torgue <alexandre.torgue@foss.st.com> | 2026-03-25 19:40:22 +0300 |
| commit | 348741a97c28d7679fb1e204aeec0d6305fc6817 (patch) | |
| tree | ad7c9fadb11932ceb5be237fb69b9c5b894d3f92 | |
| parent | f1939c6a0bed6a4af8339fd0aeb28a17b7a0d4c7 (diff) | |
| download | linux-348741a97c28d7679fb1e204aeec0d6305fc6817.tar.xz | |
pinctrl: stm32: add firewall checks before probing the HDP driver
Because the HDP peripheral both depends on debug and firewall
configuration, when CONFIG_STM32_FIREWALL is present, use the
stm32 firewall framework to be able to check these configuration against
the relevant controllers.
Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Clément Le Goffic <legoffic.clement@gmail.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://lore.kernel.org/r/20260226-debug_bus-v6-12-5d794697798d@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
| -rw-r--r-- | drivers/pinctrl/stm32/pinctrl-stm32-hdp.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c b/drivers/pinctrl/stm32/pinctrl-stm32-hdp.c index 0b1dff01e04c..cce477e86ef9 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 <clement.legoffic@foss.st.com> for STMicroelectronics. */ #include <linux/bits.h> +#include <linux/bus/stm32_firewall_device.h> #include <linux/clk.h> #include <linux/gpio/driver.h> #include <linux/gpio/generic.h> @@ -46,9 +47,11 @@ struct stm32_hdp { void __iomem *base; struct clk *clk; struct pinctrl_dev *pctl_dev; + struct stm32_firewall *firewall; struct gpio_generic_chip gpio_chip; u32 mux_conf; u32 gposet_conf; + int nb_firewall_entries; const char * const *func_name; }; @@ -615,6 +618,13 @@ static int stm32_hdp_probe(struct platform_device *pdev) return -ENOMEM; hdp->dev = dev; + if (IS_ENABLED(CONFIG_STM32_FIREWALL)) { + err = stm32_firewall_get_grant_all_access(dev, &hdp->firewall, + &hdp->nb_firewall_entries); + if (err) + return err; + } + platform_set_drvdata(pdev, hdp); hdp->base = devm_platform_ioremap_resource(pdev, 0); @@ -670,8 +680,12 @@ static int stm32_hdp_probe(struct platform_device *pdev) static void stm32_hdp_remove(struct platform_device *pdev) { struct stm32_hdp *hdp = platform_get_drvdata(pdev); + int i; writel_relaxed(HDP_CTRL_DISABLE, hdp->base + HDP_CTRL); + + for (i = 0; i < hdp->nb_firewall_entries; i++) + stm32_firewall_release_access(&hdp->firewall[i]); } static int stm32_hdp_suspend(struct device *dev) |