[U-Boot] [PATCH V2 2/9] mx6: add clock enabling functions

[Nikita Kiryanov]

On 07/08/14 17:11, Igor Grinberg wrote:
> Hi Nikita,
>
> On 08/07/14 16:05, Nikita Kiryanov wrote:
>> Add functions to enable/disable clocks for UART, SPI, ENET, and MMC.
>>
>> Cc: Stefano Babic <sbabic at denx.de>
>> Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>
>> ---
>> Changes in V2:
>> 	- No changes.
>>
>>   arch/arm/cpu/armv7/mx6/clock.c        | 99 +++++++++++++++++++++++++++++++++++
>>   arch/arm/include/asm/arch-mx6/clock.h |  5 ++
>>   2 files changed, 104 insertions(+)
>>
>> diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
>> index 7dd83ec..696dc98 100644
>> --- a/arch/arm/cpu/armv7/mx6/clock.c
>> +++ b/arch/arm/cpu/armv7/mx6/clock.c
>> @@ -36,6 +36,35 @@ void enable_ocotp_clk(unsigned char enable)
>>   }
>>   #endif
>>
>
> [...]
>
>> +#ifdef CONFIG_FEC_MXC
>> +void enable_enet_clk(unsigned char enable)
>> +{
>> +	u32 reg;
>> +
>> +	reg = __raw_readl(&imx_ccm->CCGR1);
>> +	if (enable)
>> +		reg |= MXC_CCM_CCGR1_ENET_CLK_ENABLE_MASK;
>> +	else
>> +		reg &= ~(MXC_CCM_CCGR1_ENET_CLK_ENABLE_MASK);
>> +	__raw_writel(reg, &imx_ccm->CCGR1);
>> +}
>> +#endif
>> +
>> +#ifdef CONFIG_MXC_UART
>> +void enable_uart_clk(unsigned char enable)
>> +{
>> +	u32 reg, mask;
>> +
>> +	reg = __raw_readl(&imx_ccm->CCGR5);
>> +	mask = MXC_CCM_CCGR5_UART_MASK | MXC_CCM_CCGR5_UART_SERIAL_MASK;
>> +	if (enable)
>> +		reg |= mask;
>> +	else
>> +		reg &= ~mask;
>> +	__raw_writel(reg, &imx_ccm->CCGR5);
>> +}
>> +#endif
>> +
>> +#ifdef CONFIG_SPI
>> +/* spi_num can be from 0 - 4 */
>> +int enable_cspi_clock(unsigned char enable, unsigned spi_num)
>> +{
>> +	u32 reg, mask;
>> +
>> +	if (spi_num > 4)
>> +		return -EINVAL;
>> +
>> +	mask = MXC_CCM_CCGR_CG_MASK << (spi_num * 2);
>> +	reg = readl(&imx_ccm->CCGR1);
>> +	if (enable)
>> +		reg |= mask;
>> +	else
>> +		reg &= ~mask;
>> +
>> +	__raw_writel(reg, &imx_ccm->CCGR1);
>> +	return 0;
>> +}
>> +#endif
>> +
>> +#ifdef CONFIG_MMC
>> +int enable_usdhc_clk(unsigned char enable, unsigned bus_num)
>> +{
>> +	u32 reg, mask;
>> +
>> +	if (bus_num > 3)
>> +		return -EINVAL;
>> +
>> +	mask = MXC_CCM_CCGR_CG_MASK << (bus_num * 2 + 2);
>> +	reg = readl(&imx_ccm->CCGR6);
>> +	if (enable)
>> +		reg |= mask;
>> +	else
>> +		reg &= ~mask;
>> +
>> +	__raw_writel(reg, &imx_ccm->CCGR6);
>> +	return 0;
>> +}
>> +#endif
>
> In all the above functions, can we use the clrsetbits_le32() helpers?

We can. V3 coming up..

>
> [...]
>