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Commit 43a1dd9b authored by Suraj Jitindar Singh's avatar Suraj Jitindar Singh Committed by Michael Ellerman
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powerpc/powernv: Add driver for operator panel on FSP machines 



Implement new character device driver to allow access from user space
to the operator panel display present on IBM Power Systems machines
with FSPs.

This will allow status information to be presented on the display which
is visible to a user.

The driver implements a character buffer which a user can read/write
by accessing the device (/dev/op_panel). This buffer is then displayed on
the operator panel display. Any attempt to write past the last character
position will have no effect and attempts to write more characters than
the size of the display will be truncated. The device may only be accessed
by a single process at a time.

Signed-off-by: default avatarSuraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent d0226d31

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -9081,6 +9081,12 @@ F: drivers/firmware/psci.c 
F:	include/linux/psci.h

F:	include/uapi/linux/psci.h



POWERNV OPERATOR PANEL LCD DISPLAY DRIVER

M:	Suraj Jitindar Singh <sjitindarsingh@gmail.com>

L:	linuxppc-dev@lists.ozlabs.org

S:	Maintained

F:	drivers/char/powernv-op-panel.c



PNP SUPPORT

M:	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

S:	Maintained

arch/powerpc/configs/powernv_defconfig

+1 −0
Original line number Diff line number Diff line
@@ -181,6 +181,7 @@ CONFIG_SERIAL_8250=y 
CONFIG_SERIAL_8250_CONSOLE=y

CONFIG_SERIAL_JSM=m

CONFIG_VIRTIO_CONSOLE=m

CONFIG_POWERNV_OP_PANEL=m

CONFIG_IPMI_HANDLER=y

CONFIG_IPMI_DEVICE_INTERFACE=y

CONFIG_IPMI_POWERNV=y

arch/powerpc/include/asm/opal.h

+2 −0
Original line number Diff line number Diff line
@@ -178,6 +178,8 @@ int64_t opal_dump_ack(uint32_t dump_id); 
int64_t opal_dump_resend_notification(void);



int64_t opal_get_msg(uint64_t buffer, uint64_t size);

int64_t opal_write_oppanel_async(uint64_t token, oppanel_line_t *lines,

					uint64_t num_lines);

int64_t opal_check_completion(uint64_t buffer, uint64_t size, uint64_t token);

int64_t opal_sync_host_reboot(void);

int64_t opal_get_param(uint64_t token, uint32_t param_id, uint64_t buffer,

arch/powerpc/platforms/powernv/opal-wrappers.S

+1 −0
Original line number Diff line number Diff line
@@ -278,6 +278,7 @@ OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2); 
OPAL_CALL(opal_dump_read,			OPAL_DUMP_READ);

OPAL_CALL(opal_dump_ack,			OPAL_DUMP_ACK);

OPAL_CALL(opal_get_msg,				OPAL_GET_MSG);

OPAL_CALL(opal_write_oppanel_async,		OPAL_WRITE_OPPANEL_ASYNC);

OPAL_CALL(opal_check_completion,		OPAL_CHECK_ASYNC_COMPLETION);

OPAL_CALL(opal_dump_resend_notification,	OPAL_DUMP_RESEND);

OPAL_CALL(opal_sync_host_reboot,		OPAL_SYNC_HOST_REBOOT);

arch/powerpc/platforms/powernv/opal.c

+5 −0
Original line number Diff line number Diff line
@@ -751,6 +751,9 @@ static int __init opal_init(void) 
	opal_pdev_init(opal_node, "ibm,opal-flash");

	opal_pdev_init(opal_node, "ibm,opal-prd");



	/* Initialise platform device: oppanel interface */

	opal_pdev_init(opal_node, "ibm,opal-oppanel");



	/* Initialise OPAL kmsg dumper for flushing console on panic */

	opal_kmsg_init();
@@ -885,3 +888,5 @@ EXPORT_SYMBOL_GPL(opal_i2c_request); 
/* Export these symbols for PowerNV LED class driver */

EXPORT_SYMBOL_GPL(opal_leds_get_ind);

EXPORT_SYMBOL_GPL(opal_leds_set_ind);

/* Export this symbol for PowerNV Operator Panel class driver */

EXPORT_SYMBOL_GPL(opal_write_oppanel_async);