[U-Boot] [PATCH 5/6] arm: mx5: Add NAND clock handling

Benoît Thébaudeau
2013-04-19T09:02:03Z

Dear Marek Vasut,

On Friday, April 19, 2013 6:10:54 AM, Marek Vasut wrote:
> 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: Beno?t Th?baudeau <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>
> ---
> arch/arm/cpu/armv7/mx5/clock.c | 14 ++++++++++++--
> arch/arm/include/asm/arch-mx5/clock.h | 1 +
> 2 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c
> index 76c2c52..431756e 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)
> {
> diff --git a/arch/arm/include/asm/arch-mx5/clock.h
> b/arch/arm/include/asm/arch-mx5/clock.h
> index 9cdfb48..6910192 100644
> --- a/arch/arm/include/asm/arch-mx5/clock.h
> +++ b/arch/arm/include/asm/arch-mx5/clock.h
> @@ -68,5 +68,6 @@ void set_usboh3_clk(void);
> void enable_usboh3_clk(unsigned char enable);
> void mxc_set_sata_internal_clock(void);
> int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
> +void enable_nfc_clk(unsigned char enable);
>
> #endif /* __ASM_ARCH_CLOCK_H */
> --
> 1.7.11.7

Reviewed-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>

Best regards,
Beno?t