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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-13 15:15:02 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-19 08:30:32 +0100 |
| commit | 4fce211e966c33ca882b05b1cc45ea5f137af9f8 (patch) | |
| tree | 74cedf950a78b0e1af9d268382b7a8b38b70b03a /arch/arm/mach-imx | |
| parent | cc76af2676a995a34aa7aad01ce0752f62bff7e0 (diff) | |
| download | barebox-4fce211e966c33ca882b05b1cc45ea5f137af9f8.tar.gz barebox-4fce211e966c33ca882b05b1cc45ea5f137af9f8.tar.xz | |
ARM: i.MX8M: Add and use function for early UART clock setup
The i.MX8M boards all have the same code for setting up the UART clock.
Add a common helper for it. In the helper just setup the clocks for all
UARTs as it's not worth it to have separate functions for each UART.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/imx8m.c | 26 | ||||
| -rw-r--r-- | arch/arm/mach-imx/include/mach/imx8m-ccm-regs.h | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m.c b/arch/arm/mach-imx/imx8m.c index 596c4140b3..d044531520 100644 --- a/arch/arm/mach-imx/imx8m.c +++ b/arch/arm/mach-imx/imx8m.c @@ -133,3 +133,29 @@ static int imx8mq_report_hdmi_firmware(void) return 0; } console_initcall(imx8mq_report_hdmi_firmware); + +void imx8m_early_setup_uart_clock(void) +{ + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART1); + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART2); + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART3); + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART4); + + imx8m_clock_set_target_val(IMX8M_UART1_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + imx8m_clock_set_target_val(IMX8M_UART2_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + imx8m_clock_set_target_val(IMX8M_UART3_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + imx8m_clock_set_target_val(IMX8M_UART4_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART1); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART2); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART3); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART4); +} diff --git a/arch/arm/mach-imx/include/mach/imx8m-ccm-regs.h b/arch/arm/mach-imx/include/mach/imx8m-ccm-regs.h index ff207b80f9..70a7e4af9d 100644 --- a/arch/arm/mach-imx/include/mach/imx8m-ccm-regs.h +++ b/arch/arm/mach-imx/include/mach/imx8m-ccm-regs.h @@ -48,6 +48,7 @@ #define IMX8M_CCM_CCGR_SETTINGn_NEEDED_RUN_WAIT(n) IMX8M_CCM_CCGR_SETTINGn(n, 0b10) #define IMX8M_CCM_CCGR_SETTINGn_NEEDED(n) IMX8M_CCM_CCGR_SETTINGn(n, 0b11) +void imx8m_early_setup_uart_clock(void); void imx8m_clock_set_target_val(int clock_id, u32 val); void imx8m_ccgr_clock_enable(int index); void imx8m_ccgr_clock_disable(int index); |