On Tue, Aug 15, 2017 at 4:52 PM, <icenowy@xxxxxxx> wrote:
> 在 2017-08-15 13:55，Icenowy Zheng 写道：
>>
>> Allwinner R40 SoC have a clock controller module in the style of the
>> SoCs beyond sun6i, however, it's more rich and complex.
>>
>> Add support for it.
>>
>> Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
>> ---
>> Changes in v5:
>> - Added TODO's for PLL constraints.
>> - Forced OHCI12M mux to 0.
>> - Changed "adda" clock to "codec" to be consistent with "bus-codec".
>> - Added several CLK_SET_RATE_{UNGATE,PARENT} flags.
>> - Added PLL_CPU gate notifier.
>> Changes in v4:
>> - Removed usb-ohci-12M mux clocks.
>> - Removed unused (and not in user manual) adda-4x clock.
>> - Implemented proper SATA PLL system.
>> - Renamed MP (Mixed Processor) clock names to drop the extra "DE_".
>> - Renamed TCONs' clock names to "tcon-lcdX" or "tcon-tvX".
>> - Added missing RST_DRAM.
>> - Several clock post/pre-dividers and constraints fixes.
>> Changes in v3:
>> - Rebased on current linux-next.
>> Changes in v2:
>> - Fixes according to the SoC's user manual.
>>
>> drivers/clk/sunxi-ng/Kconfig | 5 +
>> drivers/clk/sunxi-ng/Makefile | 1 +
>> drivers/clk/sunxi-ng/ccu-sun8i-r40.c | 1290
>> +++++++++++++++++++++++++++++
>> drivers/clk/sunxi-ng/ccu-sun8i-r40.h | 69 ++
>> include/dt-bindings/clock/sun8i-r40-ccu.h | 187 +++++
>> include/dt-bindings/reset/sun8i-r40-ccu.h | 130 +++
>> 6 files changed, 1682 insertions(+)
>> create mode 100644 drivers/clk/sunxi-ng/ccu-sun8i-r40.c
>> create mode 100644 drivers/clk/sunxi-ng/ccu-sun8i-r40.h
>> create mode 100644 include/dt-bindings/clock/sun8i-r40-ccu.h
>> create mode 100644 include/dt-bindings/reset/sun8i-r40-ccu.h
>>
>> [...]
>>
>> +static void __init sun8i_r40_ccu_setup(struct device_node *node)
>> +{
>> + void __iomem *reg;
>> + u32 val;
>> +
>> + reg = of_io_request_and_map(node, 0, of_node_full_name(node));
>> + if (IS_ERR(reg)) {
>> + pr_err("%s: Could not map the clock registers\n",
>> + of_node_full_name(node));
>> + return;
>> + }
>> +
>> + /* Force the PLL-Audio-1x divider to 4 */
>> + val = readl(reg + SUN8I_R40_PLL_AUDIO_REG);
>> + val &= ~GENMASK(19, 16);
>> + writel(val | (3 << 16), reg + SUN8I_R40_PLL_AUDIO_REG);
>> +
>> + /* Force PLL-MIPI to MIPI mode */
>> + val = readl(reg + SUN8I_R40_PLL_MIPI_REG);
>> + val &= ~BIT(16);
>> + writel(val, reg + SUN8I_R40_PLL_MIPI_REG);
>> +
>> + /* Force OHCI 12M parent to 0 */
Clarified the comment as
Force OHCI 12M parent to 12M divided from 48M
>> + val = readl(reg + SUN8I_R40_USB_CLK_REG);
>> + val &= ~GENMASK(20, 6);
>
>
> Sorry but I think this line should be:
>
> val &= ~GENMASK(25, 20);
>
> I didn't understand GENMASK well...
Fixed and applied. Thanks!
ChenYu
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