1 files changed, 155 insertions, 0 deletions
diff --git a/plat/imx/common/imx_clock.c b/plat/imx/common/imx_clock.c
new file mode 100644
index 0000000..743de55
--- /dev/null
+++ b/plat/imx/common/imx_clock.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <arch.h>
+#include <lib/mmio.h>
+
+#include <imx_regs.h>
+#include <imx_clock.h>
+
+void imx_clock_target_set(unsigned int id, uint32_t val)
+{
+	struct ccm *ccm = ((struct ccm *)CCM_BASE);
+	uintptr_t addr;
+
+	if (id > CCM_ROOT_CTRL_NUM)
+		return;
+
+	addr = (uintptr_t)&ccm->ccm_root_ctrl[id].ccm_target_root;
+	mmio_write_32(addr, val);
+}
+
+void imx_clock_target_clr(unsigned int id, uint32_t val)
+{
+	struct ccm *ccm = ((struct ccm *)CCM_BASE);
+	uintptr_t addr;
+
+	if (id > CCM_ROOT_CTRL_NUM)
+		return;
+
+	addr = (uintptr_t)&ccm->ccm_root_ctrl[id].ccm_target_root_clr;
+	mmio_write_32(addr, val);
+}
+
+void imx_clock_gate_enable(unsigned int id, bool enable)
+{
+	struct ccm *ccm = ((struct ccm *)CCM_BASE);
+	uintptr_t addr;
+
+	if (id > CCM_CLK_GATE_CTRL_NUM)
+		return;
+
+	/* TODO: add support for more than DOMAIN0 clocks */
+	if (enable)
+		addr = (uintptr_t)&ccm->ccm_clk_gate_ctrl[id].ccm_ccgr_set;
+	else
+		addr = (uintptr_t)&ccm->ccm_clk_gate_ctrl[id].ccm_ccgr_clr;
+
+	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);
+}
+
+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);
+}
+
+void imx_clock_enable_wdog(unsigned int wdog_id)
+{
+	unsigned int ccm_ccgr_id = CCM_CCGR_ID_WDOG1 + wdog_id;
+
+	/* Check for error */
+	if (wdog_id > MXC_MAX_WDOG_NUM)
+		return;
+
+	/* Enable the clock gate */
+	imx_clock_gate_enable(ccm_ccgr_id, true);
+}
+
+void imx_clock_disable_wdog(unsigned int wdog_id)
+{
+	unsigned int ccm_trgt_id = CCM_TRT_ID_WDOG_CLK_ROOT;
+	unsigned int ccm_ccgr_id = CCM_CCGR_ID_WDOG1 + wdog_id;
+
+	/* Check for error */
+	if (wdog_id > MXC_MAX_WDOG_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);
+}
+
+void imx_clock_set_wdog_clk_root_bits(uint32_t wdog_clk_root_en_bits)
+{
+	/* Enable the common clock root just once */
+	imx_clock_target_set(CCM_TRT_ID_WDOG_CLK_ROOT, wdog_clk_root_en_bits);
+}
+
+void imx_clock_enable_usb(unsigned int ccm_ccgr_usb_id)
+{
+	/* Enable the clock gate */
+	imx_clock_gate_enable(ccm_ccgr_usb_id, true);
+}
+
+void imx_clock_disable_usb(unsigned int ccm_ccgr_usb_id)
+{
+	/* Disable the clock gate */
+	imx_clock_gate_enable(ccm_ccgr_usb_id, false);
+}
+
+void imx_clock_set_usb_clk_root_bits(uint32_t usb_clk_root_en_bits)
+{
+	/* Enable the common clock root just once */
+	imx_clock_target_set(CCM_TRT_ID_USB_HSIC_CLK_ROOT, usb_clk_root_en_bits);
+}