diff options
| author | Sean Anderson <[email protected]> | 2026-01-29 13:40:11 -0500 |
|---|---|---|
| committer | Michal Simek <[email protected]> | 2026-02-13 08:16:25 +0100 |
| commit | df1875ea31df7762d3e4417438f5ff7563e15502 (patch) | |
| tree | dae54f1a3bce2862714f9189824a24aa01523fb6 /drivers/pinctrl | |
| parent | df4d85b9d1345a9fb450ef1956cf2d454efd7b1e (diff) | |
pinctrl: zynqmp: Add SPL support
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 <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 2 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-zynqmp.c | 8 |
3 files changed, 11 insertions, 7 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index ea90713ec6c..73dd5ff4a79 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -386,6 +386,14 @@ config PINCTRL_ZYNQMP Generic Pinctrl framework and is compatible with the Linux driver, i.e. it uses the same device tree configuration. +config SPL_PINCTRL_ZYNQMP + bool "Xilinx ZynqMP pin control driver in SPL" + depends on SPL_DM && SPL_PINCTRL_GENERIC && ARCH_ZYNQMP + default PINCTRL_ZYNQMP + help + Support pin multiplexing control in SPL on Xilinx ZynqMP. Only "pins" + can be muxed; "groups" are not supported. + endif source "drivers/pinctrl/broadcom/Kconfig" diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 33ff7b95ef2..4fb6cef3113 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -36,5 +36,5 @@ obj-$(CONFIG_$(PHASE_)PINCTRL_SX150X) += pinctrl-sx150x.o obj-$(CONFIG_$(PHASE_)PINCTRL_STMFX) += pinctrl-stmfx.o obj-$(CONFIG_PINCTRL_TH1520) += pinctrl-th1520.o obj-y += broadcom/ -obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o +obj-$(CONFIG_$(PHASE_)PINCTRL_ZYNQMP) += pinctrl-zynqmp.o obj-$(CONFIG_PINCTRL_STARFIVE) += starfive/ diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c index 7c11ac4c8b8..0b936684f8a 100644 --- a/drivers/pinctrl/pinctrl-zynqmp.c +++ b/drivers/pinctrl/pinctrl-zynqmp.c @@ -19,15 +19,11 @@ #include <linux/compat.h> #include <dt-bindings/pinctrl/pinctrl-zynqmp.h> -#define PINCTRL_GET_FUNC_GROUPS_RESP_LEN 12 -#define PINCTRL_GET_PIN_GROUPS_RESP_LEN 12 -#define NUM_GROUPS_PER_RESP 6 -#define NA_GROUP -1 -#define RESERVED_GROUP -2 +#define PINCTRL_GET_FUNC_GROUPS_RESP_LEN (sizeof(s16) * NUM_GROUPS_PER_RESP) +#define PINCTRL_GET_PIN_GROUPS_RESP_LEN (sizeof(s16) * NUM_GROUPS_PER_RESP) #define MAX_GROUP_PIN 50 #define MAX_PIN_GROUPS 50 #define MAX_GROUP_NAME_LEN 32 -#define MAX_FUNC_NAME_LEN 16 #define DRIVE_STRENGTH_2MA 2 #define DRIVE_STRENGTH_4MA 4 |