imx: imx_clock: uart: Add UART clock API
This patch adds an API to configure up the base UART 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: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
diff --git a/plat/imx/common/imx_clock.c b/plat/imx/common/imx_clock.c
index 929cf8d..8fb42e3 100644
--- a/plat/imx/common/imx_clock.c
+++ b/plat/imx/common/imx_clock.c
@@ -50,3 +50,35 @@
mmio_write_32(addr, CCM_CCGR_SETTING0_DOM_CLK_ALWAYS);
}
+
+void imx_clock_enable_uart(unsigned int uart_id, uint32_t uart_clk_en_bits)
+{
+ unsigned int ccm_trgt_id = CCM_TRT_ID_UART1_CLK_ROOT + uart_id;
+ unsigned int ccm_ccgr_id = CCM_CCGR_ID_UART1 + uart_id;
+
+ /* Check for error */
+ if (uart_id > MXC_MAX_UART_NUM)
+ return;
+
+ /* Set target register values */
+ imx_clock_target_set(ccm_trgt_id, uart_clk_en_bits);
+
+ /* Enable the clock gate */
+ imx_clock_gate_enable(ccm_ccgr_id, true);
+}
+
+void imx_clock_disable_uart(unsigned int uart_id)
+{
+ unsigned int ccm_trgt_id = CCM_TRT_ID_UART1_CLK_ROOT + uart_id;
+ unsigned int ccm_ccgr_id = CCM_CCGR_ID_UART1 + uart_id;
+
+ /* Check for error */
+ if (uart_id > MXC_MAX_UART_NUM)
+ return;
+
+ /* Disable the clock gate */
+ imx_clock_gate_enable(ccm_ccgr_id, false);
+
+ /* Clear the target */
+ imx_clock_target_clr(ccm_trgt_id, 0xFFFFFFFF);
+}
diff --git a/plat/imx/common/include/imx_clock.h b/plat/imx/common/include/imx_clock.h
index f685a14..f1d1912 100644
--- a/plat/imx/common/include/imx_clock.h
+++ b/plat/imx/common/include/imx_clock.h
@@ -989,4 +989,7 @@
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);
+
#endif /* __IMX_CLOCK_H__ */