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pinctrl: stm32: add firewall checks before probing the HDP driver

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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>
This commit is contained in:
Gatien Chevallier
2026-02-26 11:30:27 +01:00
committed by Alexandre Torgue
parent f1939c6a0b
commit 348741a97c
1 changed files with 14 additions and 0 deletions
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14
drivers/pinctrl/stm32/pinctrl-stm32-hdp.c
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@@ -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)