From: Joe Burmeister joe.burmeister@devtank.co.uk
commit 5d24f455c182d5116dd5db8e1dc501115ecc9c2c upstream.
The datasheet states:
Bit 4: ClockEnSet the ClockEn bit high to enable an external clocking (crystal or clock generator at XIN). Set the ClockEn bit to 0 to disable clocking Bit 1: CrystalEnSet the CrystalEn bit high to enable the crystal oscillator. When using an external clock source at XIN, CrystalEn must be set low.
The bit 4, MAX310X_CLKSRC_EXTCLK_BIT, should be set and was not.
This was required to make the MAX3107 with an external crystal on our board able to send or receive data.
Signed-off-by: Joe Burmeister joe.burmeister@devtank.co.uk Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/tty/serial/max310x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -571,7 +571,7 @@ static int max310x_set_ref_clk(struct ma }
/* Configure clock source */ - clksrc = xtal ? MAX310X_CLKSRC_CRYST_BIT : MAX310X_CLKSRC_EXTCLK_BIT; + clksrc = MAX310X_CLKSRC_EXTCLK_BIT | (xtal ? MAX310X_CLKSRC_CRYST_BIT : 0);
/* Configure PLL */ if (pllcfg) {