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soc/intel/cannonlake: Fix GPIO reporting 

The kernel GPIO driver only expects some GPIO communities to be exported
in the _CRS and it will not work correctly if the other communities are
exported.

CNL-LP: GPIO communities 0, 1, 4
CNL-H:  GPIO communities 0, 1, 3, 4

Additionally one of the pin offset values was incorrect in GPIO
community 1 for CNL-LP.  This doesn't have any specific failure mode but
it was found when auditing the GPIO code.

Details of the kernel expected map can be found in the linux kernel at
drivers/pinctrl/intel/pinctrl-cannonlake.c

BUG=b:120686247
TEST=check /sys/kernel/debug/pinctrl/INT34BB:00/pins to ensure that
pins >= 198 are not reading all zeros for the pin config registers.

Change-Id: Ie1a2f3b9f9f4b24a9fc57e468dee50e99753912f
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/30112
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Duncan Laurie 2018-12-08 11:58:32 -08:00 committed by Patrick Georgi
parent c81f0b6433
commit f63c3f6448
3 changed files with 11 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
src/soc/intel/cannonlake/acpi/gpio.asl
View File

@ -28,13 +28,16 @@ Device (GPIO)
{
Memory32Fixed (ReadWrite, 0, 0, COM0)
Memory32Fixed (ReadWrite, 0, 0, COM1)
Memory32Fixed (ReadWrite, 0, 0, COM2)
Memory32Fixed (ReadWrite, 0, 0, COM3)
Memory32Fixed (ReadWrite, 0, 0, COM4)
Interrupt (ResourceConsumer, Level, ActiveLow, Shared,,, GIRQ)
{ GPIO_IRQ14 }
})
/*
* GPIO communities 0, 1, and 4 are exported for the OS.
* This is based on the Linux kernel provided community map at
* drivers/pinctrl/intel/pinctrl-cannonlake.c:cnllp_communities[]
*/
Method (_CRS, 0, NotSerialized)
{
/* GPIO Community 0 */
@ -49,19 +52,6 @@ Device (GPIO)
Store (^^PCRB (PID_GPIOCOM1), BAS1)
Store (GPIO_BASE_SIZE, LEN1)
/* GPIO Community 2 */
CreateDWordField (^RBUF, ^COM2._BAS, BAS2)
CreateDWordField (^RBUF, ^COM2._LEN, LEN2)
Store (^^PCRB (PID_GPIOCOM2), BAS2)
Store (GPIO_BASE_SIZE, LEN2)
/* GPIO Community 3 */
CreateDWordField (^RBUF, ^COM3._BAS, BAS3)
CreateDWordField (^RBUF, ^COM3._LEN, LEN3)
Store (^^PCRB (PID_GPIOCOM3), BAS3)
Store (GPIO_BASE_SIZE, LEN3)
/* GPIO Community 4 */
CreateDWordField (^RBUF, ^COM4._BAS, BAS4)
CreateDWordField (^RBUF, ^COM4._LEN, LEN4)

13
src/soc/intel/cannonlake/acpi/gpio_cnp_h.asl
View File

@ -27,13 +27,17 @@ Device (GPIO)
{
Memory32Fixed (ReadWrite, 0, 0, COM0)
Memory32Fixed (ReadWrite, 0, 0, COM1)
Memory32Fixed (ReadWrite, 0, 0, COM2)
Memory32Fixed (ReadWrite, 0, 0, COM3)
Memory32Fixed (ReadWrite, 0, 0, COM4)
Interrupt (ResourceConsumer, Level, ActiveLow, Shared,,, GIRQ)
{ GPIO_IRQ14 }
})
/*
* GPIO communities 0, 1, 3, and 4 are exported for the OS.
* This is based on the Linux kernel provided community map at
* drivers/pinctrl/intel/pinctrl-cannonlake.c:cnhl_communities[]
*/
Method (_CRS, 0, NotSerialized)
{
/* GPIO Community 0 */
@ -48,19 +52,12 @@ Device (GPIO)
Store (^^PCRB (PID_GPIOCOM1), BAS1)
Store (GPIO_BASE_SIZE, LEN1)
/* GPIO Community 2 */
CreateDWordField (^RBUF, ^COM2._BAS, BAS2)
CreateDWordField (^RBUF, ^COM2._LEN, LEN2)
Store (^^PCRB (PID_GPIOCOM2), BAS2)
Store (GPIO_BASE_SIZE, LEN2)
/* GPIO Community 3 */
CreateDWordField (^RBUF, ^COM3._BAS, BAS3)
CreateDWordField (^RBUF, ^COM3._LEN, LEN3)
Store (^^PCRB (PID_GPIOCOM3), BAS3)
Store (GPIO_BASE_SIZE, LEN3)
/* GPIO Community 4 */
CreateDWordField (^RBUF, ^COM4._BAS, BAS4)
CreateDWordField (^RBUF, ^COM4._LEN, LEN4)

2
src/soc/intel/cannonlake/gpio.c
View File

@ -43,7 +43,7 @@ static const struct pad_group cnl_community1_groups[] = {
INTEL_GPP(GPP_D0, GPP_D0, GPIO_RSVD_12), /* GPP_D */
INTEL_GPP(GPP_D0, GPP_F0, GPP_F23), /* GPP_F */
INTEL_GPP(GPP_D0, GPP_H0, GPP_H23), /* GPP_H */
INTEL_GPP(GPP_D0, GPIO_RSVD_12, GPIO_RSVD_52), /* VGPIO */
INTEL_GPP(GPP_D0, GPIO_RSVD_13, GPIO_RSVD_52), /* VGPIO */
};
static const struct pad_group cnl_community2_groups[] = {