Mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2026-06-13 15:03:58 +03:00
Code Issues Packages Projects Releases Wiki Activity

pinctrl: zynqmp: Add SPL support

Browse Source 
Although the pinctrl pm requests are implemented in the PMU firmware,
PM_QUERY_DATA is actually implemented in ATF. In SPL (or when running in
EL3), ATF is not yet running, so we need to implement this API
ourselves. Do the bare minimum, allowing SPL to enumerate functions, but
don't bother with groups. Groups take up a lot of space, and can be
emulated with pins. For example, a node like

	display-port {
		mux {
			groups = "dpaux0_1";
			function = "dpaux0";
		};
	};

can be replaced by

	display-port {
		mux {
			pins = "MIO34", "MIO35", "MIO36", "MIO37";
			function = "dpaux0";
		};
	};

While this isn't backwards-compatible with existing devicetrees, it's
more than enough for SPL where we may only need to mux one or two pins.

Add SPL_PINCTRL_ZYNQMP to ensure there's no SPL size growth when pinctrl
is enabled in U-Boot but isn't necessary for SPL. The only config this
would affect is Kria, but SPL_PINCTRL_GENERIC is disabled so
SPL_PINCTRL_ZYNQMP is not selected.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20260129184011.3932790-1-sean.anderson@linux.dev
This commit is contained in:
Sean Anderson
2026-01-29 13:40:11 -05:00
committed by Michal Simek
parent df4d85b9d1
commit df1875ea31
5 changed files with 117 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/zynqmp_firmware.h
View File

@@ -185,6 +185,11 @@ enum pm_query_id {
PM_QID_CLOCK_GET_MAX_DIVISOR = 13,
};
#define NUM_GROUPS_PER_RESP 6
#define NA_GROUP -1
#define RESERVED_GROUP -2
#define MAX_FUNC_NAME_LEN 16
enum pm_pinctrl_config_param {
PM_PINCTRL_CONFIG_SLEW_RATE = 0,
PM_PINCTRL_CONFIG_BIAS_STATUS = 1,