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arch/arm/src/imxrt/imxrt_clockconfig.c and board.h: Allow clock setting for SPI and I2C from board.h.

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This commit is contained in:
David Sidrane
2019-12-12 08:33:05 -06:00
committed by Gregory Nutt
parent 42dfd18d7c
commit 2cbcb8fd00
4 changed files with 47 additions and 5 deletions
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boards/arm/imxrt/imxrt1060-evk/include/board.h
+14
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@@ -91,6 +91,14 @@
* Set USB1 PLL (PLL3) to fOut = (24Mhz * 20)
* 480Mhz = (24Mhz * 20)
*
* Set LPSPI PLL3 PFD0 to fOut = (480Mhz / 12 * 18)
* 720Mhz = (480Mhz / 12 * 18)
* 90Mhz = (720Mhz / LSPI_PODF_DIVIDER)
*
* Set LPI2C PLL3 / 8 to fOut = (480Mhz / 8)
* 60Mhz = (480Mhz / 8)
* 12Mhz = (60Mhz / LSPI_PODF_DIVIDER)
*
* These clock frequencies can be verified via the CCM_CLKO1 pin and sending
* the appropriate clock to it with something like;
*
@@ -109,6 +117,12 @@
#define IMXRT_PERCLK_PODF_DIVIDER 9
#define IMXRT_SEMC_PODF_DIVIDER 8
#define IMXRT_LPSPI_CLK_SELECT CCM_CBCMR_LPSPI_CLK_SEL_PLL3_PFD0
#define IMXRT_LSPI_PODF_DIVIDER 8
#define IMXRT_LPI2C_CLK_SELECT CCM_CSCDR2_LPI2C_CLK_SEL_PLL3_60M
#define IMXRT_LSI2C_PODF_DIVIDER 5
#define IMXRT_SYS_PLL_SELECT CCM_ANALOG_PLL_SYS_DIV_SELECT_22
#define BOARD_CPU_FREQUENCY \