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| author | Marek Vasut <marex@denx.de> | 2013-04-21 05:52:26 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-05-05 17:45:05 +0200 |
| commit | f399f63647033d59d1c029b6ad9ddb48a2a19f9e (patch) | |
| tree | 3ab61addb293c4600c959fe8de89efc726d0e947 /arch/arm/cpu | |
| parent | cfb8e87a8e0997a2baecfa7f0cbe10fb9fa8e62e (diff) | |
| download | blackbird-obmc-uboot-f399f63647033d59d1c029b6ad9ddb48a2a19f9e.tar.gz blackbird-obmc-uboot-f399f63647033d59d1c029b6ad9ddb48a2a19f9e.zip | |
arm: mx5: Add NAND clock handling
Augment the MX5 clock code with function to enable and configure
NFC clock. This is necessary to get NFC working on MX5.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/mx5/clock.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c index 76c2c529a8..431756ed69 100644 --- a/arch/arm/cpu/armv7/mx5/clock.c +++ b/arch/arm/cpu/armv7/mx5/clock.c @@ -739,10 +739,11 @@ static int config_core_clk(u32 ref, u32 freq) static int config_nfc_clk(u32 nfc_clk) { u32 parent_rate = get_emi_slow_clk(); - u32 div = parent_rate / nfc_clk; + u32 div; - if (nfc_clk <= 0) + if (nfc_clk == 0) return -EINVAL; + div = parent_rate / nfc_clk; if (div == 0) div++; if (parent_rate / div > NFC_CLK_MAX) @@ -755,6 +756,15 @@ static int config_nfc_clk(u32 nfc_clk) return 0; } +void enable_nfc_clk(unsigned char enable) +{ + unsigned int cg = enable ? MXC_CCM_CCGR_CG_ON : MXC_CCM_CCGR_CG_OFF; + + clrsetbits_le32(&mxc_ccm->CCGR5, + MXC_CCM_CCGR5_EMI_ENFC(MXC_CCM_CCGR_CG_MASK), + MXC_CCM_CCGR5_EMI_ENFC(cg)); +} + /* Config main_bus_clock for periphs */ static int config_periph_clk(u32 ref, u32 freq) { |
