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imx: imx_clock: mmc: Add USDHC clock API 

This patch adds an API to configure up the base USDHC clocks, taking a
bit-mask of silicon specific bits as an input from a higher layer in order
to direct the necessary clock source.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
This commit is contained in:
Jun Nie 2018-06-28 16:38:11 +08:00 committed by Bryan O'Donoghue
parent dcd54e9b4c
commit 14cf32aaa7
2 changed files with 17 additions and 0 deletions
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16
plat/imx/common/imx_clock.c
View File

@ -82,3 +82,19 @@ void imx_clock_disable_uart(unsigned int uart_id)
/* Clear the target */
imx_clock_target_clr(ccm_trgt_id, 0xFFFFFFFF);
}
void imx_clock_enable_usdhc(unsigned int usdhc_id, uint32_t usdhc_clk_en_bits)
{
unsigned int ccm_trgt_id = CCM_TRT_ID_USDHC1_CLK_ROOT + usdhc_id;
unsigned int ccm_ccgr_id = CCM_CCGR_ID_USBHDC1 + usdhc_id;
/* Check for error */
if (usdhc_id > MXC_MAX_USDHC_NUM)
return;
/* Set target register values */
imx_clock_target_set(ccm_trgt_id, usdhc_clk_en_bits);
/* Enable the clock gate */
imx_clock_gate_enable(ccm_ccgr_id, true);
}

1
plat/imx/common/include/imx_clock.h
View File

@ -991,5 +991,6 @@ void imx_clock_init(void);
void imx_clock_enable_uart(unsigned int uart_id, uint32_t uart_clk_en_bits);
void imx_clock_disable_uart(unsigned int uart_id);
void imx_clock_enable_usdhc(unsigned int usdhc_id, uint32_t usdhc_clk_en_bits);
#endif /* __IMX_CLOCK_H__ */