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ddfb773fb0
This patch initializes USB core clocks for the i.MX7. Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
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* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <imx_regs.h>
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#include <imx_clock.h>
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static void imx7_clock_uart_init(void)
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{
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unsigned int i;
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for (i = 0; i < MXC_MAX_UART_NUM; i++)
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imx_clock_disable_uart(i);
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}
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static void imx7_clock_wdog_init(void)
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{
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unsigned int i;
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for (i = 0; i < MXC_MAX_WDOG_NUM; i++)
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imx_clock_disable_wdog(i);
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}
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static void imx7_clock_usb_init(void)
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{
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/* Disable the clock root */
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imx_clock_target_clr(CCM_TRT_ID_USB_HSIC_CLK_ROOT, 0xFFFFFFFF);
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}
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void imx_clock_init(void)
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{
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/*
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* The BootROM hands off to the next stage with the internal 24 MHz XTAL
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* crystal already clocking the main PLL, which is very handy.
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* Here we should enable whichever peripherals are required for ATF and
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* OPTEE.
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*
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* Subsequent stages in the boot process such as u-boot and Linux
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* already have a significant and mature code-base around clocks, so our
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* objective should be to enable what we need for ATF/OPTEE without
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* breaking any existing upstream code in Linux and u-boot.
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*/
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/* Initialize UART clocks */
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imx7_clock_uart_init();
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/* Watchdog clocks */
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imx7_clock_wdog_init();
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/* USB clocks */
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imx7_clock_usb_init();
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}
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