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SubjectRe: [PATCH v1 1/5] clk: tegra: Add AHB DMA clock entry
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On 26.09.2017 12:56, Peter De Schrijver wrote:
> On Tue, Sep 26, 2017 at 02:22:02AM +0300, Dmitry Osipenko wrote:
>> AHB DMA presents on Tegra20/30. Add missing entries, so that driver
>> for AHB DMA could be implemented.
>>
>> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
>> ---
>> drivers/clk/tegra/clk-id.h | 1 +
>> drivers/clk/tegra/clk-tegra-periph.c | 1 +
>> drivers/clk/tegra/clk-tegra20.c | 6 ++++++
>> drivers/clk/tegra/clk-tegra30.c | 2 ++
>> 4 files changed, 10 insertions(+)
>>
>> diff --git a/drivers/clk/tegra/clk-id.h b/drivers/clk/tegra/clk-id.h
>> index 689f344377a7..c1661b47bbda 100644
>> --- a/drivers/clk/tegra/clk-id.h
>> +++ b/drivers/clk/tegra/clk-id.h
>> @@ -12,6 +12,7 @@ enum clk_id {
>> tegra_clk_amx,
>> tegra_clk_amx1,
>> tegra_clk_apb2ape,
>> + tegra_clk_ahbdma,
>> tegra_clk_apbdma,
>> tegra_clk_apbif,
>> tegra_clk_ape,
>> diff --git a/drivers/clk/tegra/clk-tegra-periph.c b/drivers/clk/tegra/clk-tegra-periph.c
>> index 848255cc0209..95a3d8c95f06 100644
>> --- a/drivers/clk/tegra/clk-tegra-periph.c
>> +++ b/drivers/clk/tegra/clk-tegra-periph.c
>> @@ -823,6 +823,7 @@ static struct tegra_periph_init_data gate_clks[] = {
>> GATE("timer", "clk_m", 5, 0, tegra_clk_timer, CLK_IS_CRITICAL),
>> GATE("isp", "clk_m", 23, 0, tegra_clk_isp, 0),
>> GATE("vcp", "clk_m", 29, 0, tegra_clk_vcp, 0),
>> + GATE("ahbdma", "clk_m", 33, 0, tegra_clk_ahbdma, 0),
>
> Parent for this should be hclk on Tegra30 and later chips as well..
>

It looks like other clocks have a wrong parent too here, aren't they? Like for
example "apbdma" should have "pclk" as a parent, isn't it?

>> GATE("apbdma", "clk_m", 34, 0, tegra_clk_apbdma, 0),
>> GATE("kbc", "clk_32k", 36, TEGRA_PERIPH_ON_APB | TEGRA_PERIPH_NO_RESET, tegra_clk_kbc, 0),
>> GATE("fuse", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse, 0),
>> diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c
>> index 837e5cbd60e9..e76c0d292ca7 100644
>> --- a/drivers/clk/tegra/clk-tegra20.c
>> +++ b/drivers/clk/tegra/clk-tegra20.c
>> @@ -449,6 +449,7 @@ static struct tegra_devclk devclks[] __initdata = {
>> { .con_id = "audio", .dt_id = TEGRA20_CLK_AUDIO },
>> { .con_id = "audio_2x", .dt_id = TEGRA20_CLK_AUDIO_2X },
>> { .dev_id = "tegra20-ac97", .dt_id = TEGRA20_CLK_AC97 },
>> + { .dev_id = "tegra-ahbdma", .dt_id = TEGRA20_CLK_AHBDMA },
>
> This isn't needed if you use DT bindings to get the clock handle.
>

Yes, I added it for consistency. Shouldn't we get rid of that all legacy stuff
already?

>> { .dev_id = "tegra-apbdma", .dt_id = TEGRA20_CLK_APBDMA },
>> { .dev_id = "rtc-tegra", .dt_id = TEGRA20_CLK_RTC },
>> { .dev_id = "timer", .dt_id = TEGRA20_CLK_TIMER },
>> @@ -806,6 +807,11 @@ static void __init tegra20_periph_clk_init(void)
>> clk_base, 0, 3, periph_clk_enb_refcnt);
>> clks[TEGRA20_CLK_AC97] = clk;
>>
>> + /* ahbdma */
>> + clk = tegra_clk_register_periph_gate("ahbdma", "hclk", 0, clk_base,
>> + 0, 33, periph_clk_enb_refcnt);
>> + clks[TEGRA20_CLK_AHBDMA] = clk;
>> +
>
> You can use the generic definition here if you correct the entry above.
>

Good point, same applies to "apbdma". Thank you for the suggestion.

>> /* apbdma */
>> clk = tegra_clk_register_periph_gate("apbdma", "pclk", 0, clk_base,
>> 0, 34, periph_clk_enb_refcnt);
>> diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
>> index a2d163f759b4..e99701557f29 100644
>> --- a/drivers/clk/tegra/clk-tegra30.c
>> +++ b/drivers/clk/tegra/clk-tegra30.c
>> @@ -612,6 +612,7 @@ static struct tegra_devclk devclks[] __initdata = {
>> { .con_id = "fuse_burn", .dev_id = "fuse-tegra", .dt_id = TEGRA30_CLK_FUSE_BURN },
>> { .con_id = "apbif", .dev_id = "tegra30-ahub", .dt_id = TEGRA30_CLK_APBIF },
>> { .con_id = "hda2hdmi", .dev_id = "tegra30-hda", .dt_id = TEGRA30_CLK_HDA2HDMI },
>> + { .dev_id = "tegra-ahbdma", .dt_id = TEGRA30_CLK_AHBDMA },
>
> Same as for Tegra20.
>
>> { .dev_id = "tegra-apbdma", .dt_id = TEGRA30_CLK_APBDMA },
>> { .dev_id = "rtc-tegra", .dt_id = TEGRA30_CLK_RTC },
>> { .dev_id = "timer", .dt_id = TEGRA30_CLK_TIMER },
>> @@ -788,6 +789,7 @@ static struct tegra_clk tegra30_clks[tegra_clk_max] __initdata = {
>> [tegra_clk_extern3] = { .dt_id = TEGRA30_CLK_EXTERN3, .present = true },
>> [tegra_clk_disp1] = { .dt_id = TEGRA30_CLK_DISP1, .present = true },
>> [tegra_clk_disp2] = { .dt_id = TEGRA30_CLK_DISP2, .present = true },
>> + [tegra_clk_ahbdma] = { .dt_id = TEGRA30_CLK_AHBDMA, .present = true },
>> [tegra_clk_apbdma] = { .dt_id = TEGRA30_CLK_APBDMA, .present = true },
>> [tegra_clk_rtc] = { .dt_id = TEGRA30_CLK_RTC, .present = true },
>> [tegra_clk_timer] = { .dt_id = TEGRA30_CLK_TIMER, .present = true },
>
> Cheers,
>
> Peter.
>


--
Dmitry

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