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ARM: imx6: Warn when an old DT is detected

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Now that the GPC has been converted to be a full blown irqchip
(and not a mole on the side of the GIC), booting a new kernel
with an old DT is likely to result in a rough ride for the user.

This patch makes sure such a situation is promptly detected and
the user made aware that a DT update is in order.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Marc Zyngier 2015-03-13 16:05:37 +00:00 committed by Shawn Guo
parent e33b67523f
commit 1451756479
5 changed files with 14 additions and 0 deletions
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1
arch/arm/mach-imx/common.h
View file

@ -66,6 +66,7 @@ unsigned int imx_get_soc_revision(void);
void imx_init_revision_from_anatop(void);
struct device *imx_soc_device_init(void);
void imx6_enable_rbc(bool enable);
void imx_gpc_check_dt(void);
void imx_gpc_set_arm_power_in_lpm(bool power_off);
void imx_gpc_set_arm_power_up_timing(u32 sw2iso, u32 sw);
void imx_gpc_set_arm_power_down_timing(u32 sw2iso, u32 sw);

10
arch/arm/mach-imx/gpc.c
View file

@ -275,6 +275,16 @@ static int __init imx_gpc_init(struct device_node *node,
*/
OF_DECLARE_2(irqchip, imx_gpc, "fsl,imx6q-gpc", imx_gpc_init);
void __init imx_gpc_check_dt(void)
{
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-gpc");
if (WARN_ON(!np ||
!of_find_property(np, "interrupt-controller", NULL)))
pr_warn("Outdated DT detected, system is about to crash!!!\n");
}
#ifdef CONFIG_PM_GENERIC_DOMAINS
static void _imx6q_pm_pu_power_off(struct generic_pm_domain *genpd)

1
arch/arm/mach-imx/mach-imx6q.c
View file

@ -387,6 +387,7 @@ static void __init imx6q_map_io(void)
static void __init imx6q_init_irq(void)
{
imx_gpc_check_dt();
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();

1
arch/arm/mach-imx/mach-imx6sl.c
View file

@ -61,6 +61,7 @@ static void __init imx6sl_init_machine(void)
static void __init imx6sl_init_irq(void)
{
imx_gpc_check_dt();
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();

1
arch/arm/mach-imx/mach-imx6sx.c
View file

@ -81,6 +81,7 @@ static void __init imx6sx_init_machine(void)
static void __init imx6sx_init_irq(void)
{
imx_gpc_check_dt();
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();