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>
diff --git a/plat/imx/common/imx_clock.c b/plat/imx/common/imx_clock.c
index 8fb42e3..0a13d4d 100644
--- a/plat/imx/common/imx_clock.c
+++ b/plat/imx/common/imx_clock.c
@@ -82,3 +82,19 @@
/* 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);
+}
diff --git a/plat/imx/common/include/imx_clock.h b/plat/imx/common/include/imx_clock.h
index f1d1912..51717c4 100644
--- a/plat/imx/common/include/imx_clock.h
+++ b/plat/imx/common/include/imx_clock.h
@@ -991,5 +991,6 @@
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__ */