[U-Boot] [PATCH v2 04/10] powerpc, 8xx: Implement GLL2 ERRATA

[Christophe Leroy]

Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>
---
 arch/powerpc/cpu/mpc8xx/cpu_init.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/powerpc/cpu/mpc8xx/cpu_init.c b/arch/powerpc/cpu/mpc8xx/cpu_init.c
index cf1280983a..52406e8483 100644
--- a/arch/powerpc/cpu/mpc8xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc8xx/cpu_init.c
@@ -51,6 +51,14 @@ void cpu_init_f(immap_t __iomem *immr)
 	clrsetbits_be32(&immr->im_clkrst.car_sccr, ~SCCR_MASK,
 			CONFIG_SYS_SCCR);
 
+	/* BUG MPC866 GLL2 consideration */
+	reg = in_be32(&immr->im_clkrst.car_sccr);
+	/* probably we use the mode 1:2:1 */
+	if ((reg & 0x00060000) == 0x00020000) {
+		clrbits_be32(&immr->im_clkrst.car_sccr, 0x00060000);
+		setbits_be32(&immr->im_clkrst.car_sccr, 0x00020000);
+	}
+
 	/* PLL (CPU clock) settings (15-30) */
 
 	out_be32(&immr->im_clkrstk.cark_plprcrk, KAPWR_KEY);
-- 
2.12.0