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clock_control: Add support for lpspi clock in mcux ccm driver

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Adds support for getting the lpspi clock frequency in the mcux ccm
driver.

Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
This commit is contained in:
Maureen Helm 2018-09-14 15:56:13 -05:00 • committed by Anas Nashif
commit 83a6781507
2 changed files with 18 additions and 0 deletions
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17
drivers/clock_control/clock_control_mcux_ccm.c
View file

@ -12,6 +12,13 @@
#define SYS_LOG_LEVEL CONFIG_SYS_LOG_CLOCK_CONTROL_LEVEL #define SYS_LOG_LEVEL CONFIG_SYS_LOG_CLOCK_CONTROL_LEVEL
#include <logging/sys_log.h> #include <logging/sys_log.h>
static const clock_name_t lpspi_clocks[] = {
kCLOCK_Usb1PllPfd1Clk,
kCLOCK_Usb1PllPfd0Clk,
kCLOCK_SysPllClk,
kCLOCK_SysPllPfd2Clk,
};
static int mcux_ccm_on(struct device *dev, static int mcux_ccm_on(struct device *dev,
clock_control_subsys_t sub_system) clock_control_subsys_t sub_system)
{ {
@ -31,6 +38,16 @@ static int mcux_ccm_get_subsys_rate(struct device *dev,
u32_t clock_name = (u32_t) sub_system; u32_t clock_name = (u32_t) sub_system;
switch (clock_name) { switch (clock_name) {
case IMX_CCM_LPSPI_CLK:
{
u32_t lpspi_mux = CLOCK_GetMux(kCLOCK_LpspiMux);
clock_name_t lpspi_clock = lpspi_clocks[lpspi_mux];
*rate = CLOCK_GetFreq(lpspi_clock)
/ (CLOCK_GetDiv(kCLOCK_LpspiDiv) + 1);
break;
}
case IMX_CCM_LPUART_CLK: case IMX_CCM_LPUART_CLK:
if (CLOCK_GetMux(kCLOCK_UartMux) == 0) { if (CLOCK_GetMux(kCLOCK_UartMux) == 0) {
*rate = CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6 *rate = CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6

1
include/dt-bindings/clock/imx_ccm.h
View file

@ -12,5 +12,6 @@
#define IMX_CCM_BUS_CLK 2 #define IMX_CCM_BUS_CLK 2
#define IMX_CCM_LPUART_CLK 3 #define IMX_CCM_LPUART_CLK 3
#define IMX_CCM_LPI2C_CLK 4 #define IMX_CCM_LPI2C_CLK 4
#define IMX_CCM_LPSPI_CLK 5
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_IMX_CCM_H_ */ #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_IMX_CCM_H_ */