This patch extends the imx6 clock code to enable or disable the EIM slow clock, which in necessary when one wants to use EIM interface t o read/write from external memory (e.g. NOR).
Signed-off-by: Lukasz Majewski l.majewski@majess.pl --- arch/arm/cpu/armv7/mx6/clock.c | 14 ++++++++++++++ arch/arm/include/asm/arch-mx6/clock.h | 1 + 2 files changed, 15 insertions(+)
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c index ae3143c..3227e3b 100644 --- a/arch/arm/cpu/armv7/mx6/clock.c +++ b/arch/arm/cpu/armv7/mx6/clock.c @@ -1379,6 +1379,20 @@ void select_ldb_di_clock_source(enum ldb_di_clock clk) } #endif
+#ifndef CONFIG_SYS_NO_FLASH +void enable_eim_clk(unsigned char enable) +{ + u32 reg; + + reg = __raw_readl(&imx_ccm->CCGR6); + if (enable) + reg |= MXC_CCM_CCGR6_EMI_SLOW_MASK; + else + reg &= ~MXC_CCM_CCGR6_EMI_SLOW_MASK; + __raw_writel(reg, &imx_ccm->CCGR6); +} +#endif + /***************************************************/
U_BOOT_CMD( diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h index 82f9f92..ed1433e 100644 --- a/arch/arm/include/asm/arch-mx6/clock.h +++ b/arch/arm/include/asm/arch-mx6/clock.h @@ -79,4 +79,5 @@ void enable_qspi_clk(int qspi_num); void enable_thermal_clk(void); void mxs_set_lcdclk(u32 base_addr, u32 freq); void select_ldb_di_clock_source(enum ldb_di_clock clk); +void enable_eim_clk(unsigned char enable); #endif /* __ASM_ARCH_CLOCK_H */