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drivers: clock_control: Add support for MCUX CCM IUART clock

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Add support for controlling the MCUX CCM IUART clock.

Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
This commit is contained in:
Manivannan Sadhasivam 2019-07-27 12:17:33 +05:30 • committed by Maureen Helm
commit 1118428abb
2 changed files with 16 additions and 1 deletions
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15
drivers/clock_control/clock_control_mcux_ccm.c
View file

@ -15,12 +15,14 @@
#include <logging/log.h> #include <logging/log.h>
LOG_MODULE_REGISTER(clock_control); LOG_MODULE_REGISTER(clock_control);
#ifdef CONFIG_SPI_MCUX_LPSPI
static const clock_name_t lpspi_clocks[] = { static const clock_name_t lpspi_clocks[] = {
kCLOCK_Usb1PllPfd1Clk, kCLOCK_Usb1PllPfd1Clk,
kCLOCK_Usb1PllPfd0Clk, kCLOCK_Usb1PllPfd0Clk,
kCLOCK_SysPllClk, kCLOCK_SysPllClk,
kCLOCK_SysPllPfd2Clk, kCLOCK_SysPllPfd2Clk,
}; };
#endif
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)
@ -55,6 +57,7 @@ static int mcux_ccm_get_subsys_rate(struct device *dev,
break; break;
#endif #endif
#ifdef CONFIG_SPI_MCUX_LPSPI
case IMX_CCM_LPSPI_CLK: case IMX_CCM_LPSPI_CLK:
{ {
uint32_t lpspi_mux = CLOCK_GetMux(kCLOCK_LpspiMux); uint32_t lpspi_mux = CLOCK_GetMux(kCLOCK_LpspiMux);
@ -64,7 +67,9 @@ static int mcux_ccm_get_subsys_rate(struct device *dev,
/ (CLOCK_GetDiv(kCLOCK_LpspiDiv) + 1); / (CLOCK_GetDiv(kCLOCK_LpspiDiv) + 1);
break; break;
} }
#endif
#ifdef CONFIG_UART_MCUX_LPUART
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
@ -75,6 +80,7 @@ static int mcux_ccm_get_subsys_rate(struct device *dev,
} }
break; break;
#endif
#ifdef CONFIG_DISK_ACCESS_USDHC1 #ifdef CONFIG_DISK_ACCESS_USDHC1
case IMX_CCM_USDHC1_CLK: case IMX_CCM_USDHC1_CLK:
@ -95,6 +101,15 @@ static int mcux_ccm_get_subsys_rate(struct device *dev,
*rate = CLOCK_GetIpgFreq(); *rate = CLOCK_GetIpgFreq();
break; break;
#endif #endif
#ifdef CONFIG_UART_MCUX_IUART
case IMX_CCM_UART_CLK:
*rate = CLOCK_GetPllFreq(kCLOCK_SystemPll1Ctrl) /
(CLOCK_GetRootPreDivider(kCLOCK_RootUart4)) /
(CLOCK_GetRootPostDivider(kCLOCK_RootUart4)) /
10;
break;
#endif
} }
return 0; return 0;

2
include/dt-bindings/clock/imx_ccm.h
View file

@ -16,6 +16,6 @@
#define IMX_CCM_USDHC1_CLK 6 #define IMX_CCM_USDHC1_CLK 6
#define IMX_CCM_USDHC2_CLK 7 #define IMX_CCM_USDHC2_CLK 7
#define IMX_CCM_EDMA_CLK 8 #define IMX_CCM_EDMA_CLK 8
#define IMX_CCM_UART_CLK 9
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_IMX_CCM_H_ */ #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_IMX_CCM_H_ */