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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-13 15:14:52 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-19 08:30:32 +0100 |
| commit | cc76af2676a995a34aa7aad01ce0752f62bff7e0 (patch) | |
| tree | c1e6a4c9b3eb4c1725912315a64031b4806bac53 /arch/arm/mach-imx | |
| parent | d97b8f93ee35b09d6a76cfb137c708470e3e47b2 (diff) | |
| download | barebox-cc76af2676a995a34aa7aad01ce0752f62bff7e0.tar.gz barebox-cc76af2676a995a34aa7aad01ce0752f62bff7e0.tar.xz | |
ARM: i.MX7: Add and use function for early UART clock setup
The i.MX7 boards have the same code for setting up the UART clock. Add a
common helper function for it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/include/mach/imx7-ccm-regs.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h index b78adf9f1c..de6eb1bbd1 100644 --- a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h +++ b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h @@ -33,4 +33,16 @@ #define IMX7_CCM_CCGR_SETTINGn_NEEDED_RUN_WAIT(n) IMX7_CCM_CCGR_SETTINGn(n, 0b10) #define IMX7_CCM_CCGR_SETTINGn_NEEDED(n) IMX7_CCM_CCGR_SETTINGn(n, 0b11) +static inline void imx7_early_setup_uart_clock(void) +{ + void __iomem *ccm = IOMEM(MX7_CCM_BASE_ADDR); + + writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), + ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART1)); + writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART1_CLK_ROOT__OSC_24M, + ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART1_CLK_ROOT)); + writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), + ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART1)); +} + #endif |