From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Date: Wed, 30 May 2018 18:56:54 +0000 (+0100)
Subject: imx: imx_clock: uart: Add UART clock API
X-Git-Url: http://git.openwrt.org/%22https:/collectd.org//%22/%22https:/collectd.org/%22?a=commitdiff_plain;h=dcd54e9b4cbe0e771e63f0e53f2d3a59198b48d3;p=project%2Fbcm63xx%2Fatf.git

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 929cf8d3..8fb42e3e 100644
--- a/plat/imx/common/imx_clock.c
+++ b/plat/imx/common/imx_clock.c
@@ -50,3 +50,35 @@ void imx_clock_gate_enable(unsigned int id, bool enable)
 
 	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 f685a143..f1d1912d 100644
--- a/plat/imx/common/include/imx_clock.h
+++ b/plat/imx/common/include/imx_clock.h
@@ -989,4 +989,7 @@ void imx_clock_gate_enable(unsigned int id, bool enable);
 
 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__ */