Commit 348741a9 authored by Gatien Chevallier's avatar Gatien Chevallier Committed by Alexandre Torgue
Browse files

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: default avatarGatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: default avatarClément Le Goffic <legoffic.clement@gmail.com>
Reviewed-by: default avatarLinus Walleij <linusw@kernel.org>
Link: https://lore.kernel.org/r/20260226-debug_bus-v6-12-5d794697798d@foss.st.com


Signed-off-by: default avatarAlexandre Torgue <alexandre.torgue@foss.st.com>
parent f1939c6a

drivers/pinctrl/stm32/pinctrl-stm32-hdp.c

+14 −0
Original line number Diff line number Diff line
@@ -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)