[PATCH] mx6: peripheral clock from oscillator

[Jorge Ramirez-Ortiz]

In order to be able to run the I2C bus at 400Khz, the chip errata[1]
recommends that the peripheral clock runs out of the 24MHz oscillator.

[1] Rev 2, 10/2019, ERR007805

Signed-off-by: Jorge Ramirez-Ortiz <jorge at foundries.io>
---
 arch/arm/mach-imx/mx6/soc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/mx6/soc.c b/arch/arm/mach-imx/mx6/soc.c
index e129286065..f498c93b00 100644
--- a/arch/arm/mach-imx/mx6/soc.c
+++ b/arch/arm/mach-imx/mx6/soc.c
@@ -26,6 +26,8 @@
 #include <imx_thermal.h>
 #include <mmc.h>
 
+#define ERRATA_ERR007805 (is_mx6dl() || is_mx6solo() || is_mx6ull())
+
 struct scu_regs {
 	u32	ctrl;
 	u32	config;
@@ -469,7 +471,7 @@ int arch_cpu_init(void)
 	}
 
 	/* Set perclk to source from OSC 24MHz */
-	if (is_mx6sl())
+	if (is_mx6sl() || ERRATA_ERR007805)
 		setbits_le32(&ccm->cscmr1, MXC_CCM_CSCMR1_PER_CLK_SEL_MASK);
 
 	imx_wdog_disable_powerdown(); /* Disable PDE bit of WMCR register */
-- 
2.17.1