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boards: nxp: frdm_mcxn947: Updated Init Clock for LPTMR

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Updated the clocks that get initialized for the MCXN947
when using the LPTMR. The LPTMR allows the user to select
and Input clock, however said input clock must be
initialized before the user can select it.
Update description for clk-source in binding file.

Signed-off-by: Emilio Benavente <emilio.benavente@nxp.com>
This commit is contained in:
Emilio Benavente 2024-08-05 03:52:06 +00:00 • committed by Alberto Escolar
commit 67b7c993e1
2 changed files with 28 additions and 2 deletions
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22
boards/nxp/frdm_mcxn947/board.c
View file

@ -299,8 +299,28 @@ static int frdm_mcxn947_init(void)
#endif #endif
#if DT_NODE_HAS_STATUS(DT_NODELABEL(lptmr0), okay) #if DT_NODE_HAS_STATUS(DT_NODELABEL(lptmr0), okay)
/*
* Clock Select Decides what input source the lptmr will clock from
*
* 0 <- 12MHz FRO
* 1 <- 16K FRO
* 2 <- 32K OSC
* 3 <- Output from the OSC_SYS
*/
#if DT_PROP(DT_NODELABEL(lptmr0), clk_source) == 0x0
CLOCK_SetupClockCtrl(kCLOCK_FRO12MHZ_ENA);
#elif DT_PROP(DT_NODELABEL(lptmr0), clk_source) == 0x1
CLOCK_SetupClk16KClocking(kCLOCK_Clk16KToVsys); CLOCK_SetupClk16KClocking(kCLOCK_Clk16KToVsys);
#endif #elif DT_PROP(DT_NODELABEL(lptmr0), clk_source) == 0x2
CLOCK_SetupOsc32KClocking(kCLOCK_Osc32kToVsys);
#elif DT_PROP(DT_NODELABEL(lptmr0), clk_source) == 0x3
/* Value here should not exceed 25MHZ when using lptmr */
CLOCK_SetupExtClocking(MHZ(24));
CLOCK_SetupClockCtrl(kCLOCK_CLKIN_ENA_FM_USBH_LPT);
#endif /* DT_PROP(DT_NODELABEL(lptmr0), clk_source) */
#endif /* DT_NODE_HAS_STATUS(DT_NODELABEL(lptmr0), okay) */
#if DT_NODE_HAS_STATUS(DT_NODELABEL(flexio0), okay) #if DT_NODE_HAS_STATUS(DT_NODELABEL(flexio0), okay)
CLOCK_SetClkDiv(kCLOCK_DivFlexioClk, 1u); CLOCK_SetClkDiv(kCLOCK_DivFlexioClk, 1u);

8
dts/bindings/counter/nxp,lptmr.yaml
View file

@ -20,7 +20,13 @@ properties:
clk-source: clk-source:
type: int type: int
required: true required: true
description: Prescaler clock source (0 to 3) enum: [0, 1, 2, 3]
description: |
Selects the clock to be used by the LPMTR prescaler/glitch filter.
In time counter mode, this field selects the input clock to the prescaler.
In pulse counter mode, this field selects the input clock to the glitch filter.
The clock connections vary by device, see the device reference manual for
more details.
input-pin: input-pin:
type: int type: int