Re: [PATCH 2/2] clk: samsung: exynos850: Implement CMU_APM domain

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On 22/10/2021 15:39, Sam Protsenko wrote:
> On Fri, 22 Oct 2021 at 11:58, Chanwoo Choi <cwchoi00@xxxxxxxxx> wrote:
>>
>> On 21. 10. 22. 오전 5:31, Sam Protsenko wrote:
>>> CMU_APM clock domain provides clocks for APM IP-core (Active Power
>>> Management). According to Exynos850 TRM, CMU_APM generates I3C, Mailbox,
>>> Speedy, Timer, WDT, RTC and PMU clocks for BLK_ALIVE.
>>>
>>> This patch adds next clocks:
>>>    - bus clocks in CMU_TOP needed for CMU_APM
>>>    - all internal CMU_APM clocks
>>>    - leaf clocks for I3C, Speedy and RTC IP-cores
>>>    - bus clocks for CMU_CMGP and CMU_CHUB
>>>
>>> CMU_APM doesn't belong to Power Domains, but platform driver is used for
>>> its registration to keep its bus clock always running. Otherwise rtc-s3c
>>> driver disables that clock and system freezes.
>>>
>>> Signed-off-by: Sam Protsenko <semen.protsenko@xxxxxxxxxx>
>>> ---
>>>   drivers/clk/samsung/clk-exynos850.c   | 142 +++++++++++++++++++++++++-
>>>   include/dt-bindings/clock/exynos850.h | 107 +++++++++++--------
>>>   2 files changed, 208 insertions(+), 41 deletions(-)
>>>
>>> diff --git a/drivers/clk/samsung/clk-exynos850.c b/drivers/clk/samsung/clk-exynos850.c
>>> index 2294989e244c..95e373d17b42 100644
>>> --- a/drivers/clk/samsung/clk-exynos850.c
>>> +++ b/drivers/clk/samsung/clk-exynos850.c
>>> @@ -72,6 +72,7 @@ static void __init exynos850_init_clocks(struct device_node *np,
>>>   #define PLL_CON3_PLL_SHARED0                        0x014c
>>>   #define PLL_CON0_PLL_SHARED1                        0x0180
>>>   #define PLL_CON3_PLL_SHARED1                        0x018c
>>> +#define CLK_CON_MUX_MUX_CLKCMU_APM_BUS               0x1000
>>>   #define CLK_CON_MUX_MUX_CLKCMU_CORE_BUS             0x1014
>>>   #define CLK_CON_MUX_MUX_CLKCMU_CORE_CCI             0x1018
>>>   #define CLK_CON_MUX_MUX_CLKCMU_CORE_MMC_EMBD        0x101c
>>> @@ -83,6 +84,7 @@ static void __init exynos850_init_clocks(struct device_node *np,
>>>   #define CLK_CON_MUX_MUX_CLKCMU_PERI_BUS             0x1070
>>>   #define CLK_CON_MUX_MUX_CLKCMU_PERI_IP              0x1074
>>>   #define CLK_CON_MUX_MUX_CLKCMU_PERI_UART    0x1078
>>> +#define CLK_CON_DIV_CLKCMU_APM_BUS           0x180c
>>>   #define CLK_CON_DIV_CLKCMU_CORE_BUS         0x1820
>>>   #define CLK_CON_DIV_CLKCMU_CORE_CCI         0x1824
>>>   #define CLK_CON_DIV_CLKCMU_CORE_MMC_EMBD    0x1828
>>> @@ -100,6 +102,7 @@ static void __init exynos850_init_clocks(struct device_node *np,
>>>   #define CLK_CON_DIV_PLL_SHARED1_DIV2                0x1898
>>>   #define CLK_CON_DIV_PLL_SHARED1_DIV3                0x189c
>>>   #define CLK_CON_DIV_PLL_SHARED1_DIV4                0x18a0
>>> +#define CLK_CON_GAT_GATE_CLKCMU_APM_BUS              0x2008
>>>   #define CLK_CON_GAT_GATE_CLKCMU_CORE_BUS    0x201c
>>>   #define CLK_CON_GAT_GATE_CLKCMU_CORE_CCI    0x2020
>>>   #define CLK_CON_GAT_GATE_CLKCMU_CORE_MMC_EMBD       0x2024
>>> @@ -122,6 +125,7 @@ static const unsigned long top_clk_regs[] __initconst = {
>>>       PLL_CON3_PLL_SHARED0,
>>>       PLL_CON0_PLL_SHARED1,
>>>       PLL_CON3_PLL_SHARED1,
>>> +     CLK_CON_MUX_MUX_CLKCMU_APM_BUS,
>>>       CLK_CON_MUX_MUX_CLKCMU_CORE_BUS,
>>>       CLK_CON_MUX_MUX_CLKCMU_CORE_CCI,
>>>       CLK_CON_MUX_MUX_CLKCMU_CORE_MMC_EMBD,
>>> @@ -133,6 +137,7 @@ static const unsigned long top_clk_regs[] __initconst = {
>>>       CLK_CON_MUX_MUX_CLKCMU_PERI_BUS,
>>>       CLK_CON_MUX_MUX_CLKCMU_PERI_IP,
>>>       CLK_CON_MUX_MUX_CLKCMU_PERI_UART,
>>> +     CLK_CON_DIV_CLKCMU_APM_BUS,
>>>       CLK_CON_DIV_CLKCMU_CORE_BUS,
>>>       CLK_CON_DIV_CLKCMU_CORE_CCI,
>>>       CLK_CON_DIV_CLKCMU_CORE_MMC_EMBD,
>>> @@ -150,6 +155,7 @@ static const unsigned long top_clk_regs[] __initconst = {
>>>       CLK_CON_DIV_PLL_SHARED1_DIV2,
>>>       CLK_CON_DIV_PLL_SHARED1_DIV3,
>>>       CLK_CON_DIV_PLL_SHARED1_DIV4,
>>> +     CLK_CON_GAT_GATE_CLKCMU_APM_BUS,
>>>       CLK_CON_GAT_GATE_CLKCMU_CORE_BUS,
>>>       CLK_CON_GAT_GATE_CLKCMU_CORE_CCI,
>>>       CLK_CON_GAT_GATE_CLKCMU_CORE_MMC_EMBD,
>>> @@ -183,6 +189,8 @@ static const struct samsung_pll_clock top_pll_clks[] __initconst = {
>>>   PNAME(mout_shared0_pll_p)   = { "oscclk", "fout_shared0_pll" };
>>>   PNAME(mout_shared1_pll_p)   = { "oscclk", "fout_shared1_pll" };
>>>   PNAME(mout_mmc_pll_p)               = { "oscclk", "fout_mmc_pll" };
>>> +/* List of parent clocks for Muxes in CMU_TOP: for CMU_APM */
>>> +PNAME(mout_clkcmu_apm_bus_p) = { "dout_shared0_div4", "pll_shared1_div4" };
>>>   /* List of parent clocks for Muxes in CMU_TOP: for CMU_CORE */
>>>   PNAME(mout_core_bus_p)              = { "dout_shared1_div2", "dout_shared0_div3",
>>>                                   "dout_shared1_div3", "dout_shared0_div4" };
>>> @@ -222,6 +230,10 @@ static const struct samsung_mux_clock top_mux_clks[] __initconst = {
>>>       MUX(CLK_MOUT_MMC_PLL, "mout_mmc_pll", mout_mmc_pll_p,
>>>           PLL_CON0_PLL_MMC, 4, 1),
>>>
>>> +     /* APM */
>>> +     MUX(CLK_MOUT_CLKCMU_APM_BUS, "mout_clkcmu_apm_bus",
>>> +         mout_clkcmu_apm_bus_p, CLK_CON_MUX_MUX_CLKCMU_APM_BUS, 0, 1),
>>> +
>>>       /* CORE */
>>>       MUX(CLK_MOUT_CORE_BUS, "mout_core_bus", mout_core_bus_p,
>>>           CLK_CON_MUX_MUX_CLKCMU_CORE_BUS, 0, 2),
>>> @@ -268,6 +280,10 @@ static const struct samsung_div_clock top_div_clks[] __initconst = {
>>>       DIV(CLK_DOUT_SHARED1_DIV4, "dout_shared1_div4", "dout_shared1_div2",
>>>           CLK_CON_DIV_PLL_SHARED1_DIV4, 0, 1),
>>>
>>> +     /* APM */
>>> +     DIV(CLK_DOUT_CLKCMU_APM_BUS, "dout_clkcmu_apm_bus",
>>> +         "gout_clkcmu_apm_bus", CLK_CON_DIV_CLKCMU_APM_BUS, 0, 3),
>>> +
>>>       /* CORE */
>>>       DIV(CLK_DOUT_CORE_BUS, "dout_core_bus", "gout_core_bus",
>>>           CLK_CON_DIV_CLKCMU_CORE_BUS, 0, 4),
>>> @@ -310,6 +326,10 @@ static const struct samsung_gate_clock top_gate_clks[] __initconst = {
>>>       GATE(CLK_GOUT_CORE_SSS, "gout_core_sss", "mout_core_sss",
>>>            CLK_CON_GAT_GATE_CLKCMU_CORE_SSS, 21, 0, 0),
>>>
>>> +     /* APM */
>>> +     GATE(CLK_GOUT_CLKCMU_APM_BUS, "gout_clkcmu_apm_bus",
>>> +          "mout_clkcmu_apm_bus", CLK_CON_GAT_GATE_CLKCMU_APM_BUS, 21, 0, 0),
>>> +
>>>       /* DPU */
>>>       GATE(CLK_GOUT_DPU, "gout_dpu", "mout_dpu",
>>>            CLK_CON_GAT_GATE_CLKCMU_DPU, 21, 0, 0),
>>> @@ -354,6 +374,124 @@ static void __init exynos850_cmu_top_init(struct device_node *np)
>>>   CLK_OF_DECLARE(exynos850_cmu_top, "samsung,exynos850-cmu-top",
>>>              exynos850_cmu_top_init);
>>>
>>> +/* ---- CMU_APM ------------------------------------------------------------- */
>>> +
>>> +/* Register Offset definitions for CMU_APM (0x11800000) */
>>> +#define PLL_CON0_MUX_CLKCMU_APM_BUS_USER             0x0600
>>> +#define PLL_CON0_MUX_CLK_RCO_APM_I3C_USER            0x0610
>>> +#define PLL_CON0_MUX_CLK_RCO_APM_USER                        0x0620
>>> +#define PLL_CON0_MUX_DLL_USER                                0x0630
>>> +#define CLK_CON_MUX_MUX_CLKCMU_CHUB_BUS                      0x1000
>>> +#define CLK_CON_MUX_MUX_CLK_APM_BUS                  0x1004
>>> +#define CLK_CON_MUX_MUX_CLK_APM_I3C                  0x1008
>>> +#define CLK_CON_DIV_CLKCMU_CHUB_BUS                  0x1800
>>> +#define CLK_CON_DIV_DIV_CLK_APM_BUS                  0x1804
>>> +#define CLK_CON_DIV_DIV_CLK_APM_I3C                  0x1808
>>> +#define CLK_CON_GAT_CLKCMU_CMGP_BUS                  0x2000
>>> +#define CLK_CON_GAT_GATE_CLKCMU_CHUB_BUS             0x2014
>>> +#define CLK_CON_GAT_GOUT_APM_APBIF_RTC_PCLK          0x2024
>>> +#define CLK_CON_GAT_GOUT_APM_APBIF_TOP_RTC_PCLK              0x2028
>>> +#define CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_PCLK     0x2034
>>> +#define CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_SCLK     0x2038
>>> +#define CLK_CON_GAT_GOUT_APM_SPEEDY_APM_PCLK         0x20bc
>>> +
>>> +static const unsigned long apm_clk_regs[] __initconst = {
>>> +     PLL_CON0_MUX_CLKCMU_APM_BUS_USER,
>>> +     PLL_CON0_MUX_CLK_RCO_APM_I3C_USER,
>>> +     PLL_CON0_MUX_CLK_RCO_APM_USER,
>>> +     PLL_CON0_MUX_DLL_USER,
>>> +     CLK_CON_MUX_MUX_CLKCMU_CHUB_BUS,
>>> +     CLK_CON_MUX_MUX_CLK_APM_BUS,
>>> +     CLK_CON_MUX_MUX_CLK_APM_I3C,
>>> +     CLK_CON_DIV_CLKCMU_CHUB_BUS,
>>> +     CLK_CON_DIV_DIV_CLK_APM_BUS,
>>> +     CLK_CON_DIV_DIV_CLK_APM_I3C,
>>> +     CLK_CON_GAT_CLKCMU_CMGP_BUS,
>>> +     CLK_CON_GAT_GATE_CLKCMU_CHUB_BUS,
>>> +     CLK_CON_GAT_GOUT_APM_APBIF_RTC_PCLK,
>>> +     CLK_CON_GAT_GOUT_APM_APBIF_TOP_RTC_PCLK,
>>> +     CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_PCLK,
>>> +     CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_SCLK,
>>> +     CLK_CON_GAT_GOUT_APM_SPEEDY_APM_PCLK,
>>> +};
>>> +
>>> +/* List of parent clocks for Muxes in CMU_APM */
>>> +PNAME(mout_apm_bus_user_p)   = { "oscclk_rco_apm", "dout_clkcmu_apm_bus" };
>>> +PNAME(mout_rco_apm_i3c_user_p)       = { "oscclk_rco_apm", "clk_rco_i3c_pmic" };
>>> +PNAME(mout_rco_apm_user_p)   = { "oscclk_rco_apm", "clk_rco_apm__alv" };
>>> +PNAME(mout_dll_user_p)               = { "oscclk_rco_apm", "clk_dll_dco" };
>>> +PNAME(mout_clkcmu_chub_bus_p)        = { "mout_apm_bus_user", "mout_dll_user" };
>>> +PNAME(mout_apm_bus_p)                = { "mout_rco_apm_user", "mout_apm_bus_user",
>>> +                                 "mout_dll_user", "oscclk_rco_apm" };
>>> +PNAME(mout_apm_i3c_p)                = { "dout_apm_i3c", "mout_rco_apm_i3c_user" };
>>> +
>>> +static const struct samsung_fixed_rate_clock apm_fixed_clks[] __initconst = {
>>> +     FRATE(CLK_RCO_I3C_PMIC, "clk_rco_i3c_pmic", NULL, 0, 491520000),
>>> +     FRATE(OSCCLK_RCO_APM, "oscclk_rco_apm", NULL, 0, 24576000),
>>> +     FRATE(CLK_RCO_APM__ALV, "clk_rco_apm__alv", NULL, 0, 49152000),
>>> +     FRATE(CLK_DLL_DCO, "clk_dll_dco", NULL, 0, 360000000),
>>> +};
>>> +
>>> +static const struct samsung_mux_clock apm_mux_clks[] __initconst = {
>>> +     MUX(CLK_MOUT_APM_BUS_USER, "mout_apm_bus_user", mout_apm_bus_user_p,
>>> +         PLL_CON0_MUX_CLKCMU_APM_BUS_USER, 4, 1),
>>> +     MUX(CLK_MOUT_RCO_APM_I3C_USER, "mout_rco_apm_i3c_user",
>>> +         mout_rco_apm_i3c_user_p, PLL_CON0_MUX_CLK_RCO_APM_I3C_USER, 4, 1),
>>> +     MUX(CLK_MOUT_RCO_APM_USER, "mout_rco_apm_user", mout_rco_apm_user_p,
>>> +         PLL_CON0_MUX_CLK_RCO_APM_USER, 4, 1),
>>> +     MUX(CLK_MOUT_DLL_USER, "mout_dll_user", mout_dll_user_p,
>>> +         PLL_CON0_MUX_DLL_USER, 4, 1),
>>> +     MUX(CLK_MOUT_CLKCMU_CHUB_BUS, "mout_clkcmu_chub_bus",
>>> +         mout_clkcmu_chub_bus_p, CLK_CON_MUX_MUX_CLKCMU_CHUB_BUS, 0, 1),
>>> +     MUX(CLK_MOUT_APM_BUS, "mout_apm_bus", mout_apm_bus_p,
>>> +         CLK_CON_MUX_MUX_CLK_APM_BUS, 0, 2),
>>> +     MUX(CLK_MOUT_APM_I3C, "mout_apm_i3c", mout_apm_i3c_p,
>>> +         CLK_CON_MUX_MUX_CLK_APM_I3C, 0, 1),
>>> +};
>>> +
>>> +static const struct samsung_div_clock apm_div_clks[] __initconst = {
>>> +     DIV(CLK_DOUT_CLKCMU_CHUB_BUS, "dout_clkcmu_chub_bus",
>>> +         "gout_clkcmu_chub_bus",
>>> +         CLK_CON_DIV_CLKCMU_CHUB_BUS, 0, 3),
>>> +     DIV(CLK_DOUT_APM_BUS, "dout_apm_bus", "mout_apm_bus",
>>> +         CLK_CON_DIV_DIV_CLK_APM_BUS, 0, 3),
>>> +     DIV(CLK_DOUT_APM_I3C, "dout_apm_i3c", "mout_apm_bus",
>>> +         CLK_CON_DIV_DIV_CLK_APM_I3C, 0, 3),
>>> +};
>>> +
>>> +static const struct samsung_gate_clock apm_gate_clks[] __initconst = {
>>> +     GATE(CLK_GOUT_CLKCMU_CMGP_BUS, "gout_clkcmu_cmgp_bus", "dout_apm_bus",
>>> +          CLK_CON_GAT_CLKCMU_CMGP_BUS, 21, 0, 0),
>>> +     GATE(CLK_GOUT_CLKCMU_CHUB_BUS, "gout_clkcmu_chub_bus",
>>> +          "mout_clkcmu_chub_bus",
>>> +          CLK_CON_GAT_GATE_CLKCMU_CHUB_BUS, 21, 0, 0),
>>> +     GATE(CLK_GOUT_RTC_PCLK, "gout_rtc_pclk", "dout_apm_bus",
>>> +          CLK_CON_GAT_GOUT_APM_APBIF_RTC_PCLK, 21, 0, 0),
>>> +     GATE(CLK_GOUT_TOP_RTC_PCLK, "gout_top_rtc_pclk", "dout_apm_bus",
>>> +          CLK_CON_GAT_GOUT_APM_APBIF_TOP_RTC_PCLK, 21, 0, 0),
>>> +     GATE(CLK_GOUT_I3C_PCLK, "gout_i3c_pclk", "dout_apm_bus",
>>> +          CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_PCLK, 21, 0, 0),
>>> +     GATE(CLK_GOUT_I3C_SCLK, "gout_i3c_sclk", "mout_apm_i3c",
>>> +          CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_SCLK, 21, 0, 0),
>>> +     GATE(CLK_GOUT_SPEEDY_PCLK, "gout_speedy_pclk", "dout_apm_bus",
>>> +          CLK_CON_GAT_GOUT_APM_SPEEDY_APM_PCLK, 21, 0, 0),
>>> +};
>>> +
>>> +static const struct samsung_cmu_info apm_cmu_info __initconst = {
>>> +     .mux_clks               = apm_mux_clks,
>>> +     .nr_mux_clks            = ARRAY_SIZE(apm_mux_clks),
>>> +     .div_clks               = apm_div_clks,
>>> +     .nr_div_clks            = ARRAY_SIZE(apm_div_clks),
>>> +     .gate_clks              = apm_gate_clks,
>>> +     .nr_gate_clks           = ARRAY_SIZE(apm_gate_clks),
>>> +     .fixed_clks             = apm_fixed_clks,
>>> +     .nr_fixed_clks          = ARRAY_SIZE(apm_fixed_clks),
>>> +     .nr_clk_ids             = APM_NR_CLK,
>>> +     .clk_regs               = apm_clk_regs,
>>> +     .nr_clk_regs            = ARRAY_SIZE(apm_clk_regs),
>>> +     .clk_name               = "dout_clkcmu_apm_bus",
>>> +};
>>> +
>>>   /* ---- CMU_HSI ------------------------------------------------------------- */
>>>
>>>   /* Register Offset definitions for CMU_HSI (0x13400000) */
>>> @@ -801,9 +939,11 @@ static int __init exynos850_cmu_probe(struct platform_device *pdev)
>>>       return 0;
>>>   }
>>>
>>> -/* CMUs which belong to Power Domains and need runtime PM to be implemented */
>>>   static const struct of_device_id exynos850_cmu_of_match[] = {
>>>       {
>>> +             .compatible = "samsung,exynos850-cmu-apm",
>>> +             .data = &apm_cmu_info,
>>> +     }, {
>>>               .compatible = "samsung,exynos850-cmu-hsi",
>>>               .data = &hsi_cmu_info,
>>>       }, {
>>> diff --git a/include/dt-bindings/clock/exynos850.h b/include/dt-bindings/clock/exynos850.h
>>> index 8999184f94a2..c65e0300a8d3 100644
>>> --- a/include/dt-bindings/clock/exynos850.h
>>> +++ b/include/dt-bindings/clock/exynos850.h
>>> @@ -16,46 +16,73 @@
>>>   #define CLK_MOUT_SHARED0_PLL                4
>>>   #define CLK_MOUT_SHARED1_PLL                5
>>>   #define CLK_MOUT_MMC_PLL            6
>>> -#define CLK_MOUT_CORE_BUS            7
>>> -#define CLK_MOUT_CORE_CCI            8
>>> -#define CLK_MOUT_CORE_MMC_EMBD               9
>>> -#define CLK_MOUT_CORE_SSS            10
>>> -#define CLK_MOUT_DPU                 11
>>> -#define CLK_MOUT_HSI_BUS             12
>>> -#define CLK_MOUT_HSI_MMC_CARD                13
>>> -#define CLK_MOUT_HSI_USB20DRD                14
>>> -#define CLK_MOUT_PERI_BUS            15
>>> -#define CLK_MOUT_PERI_UART           16
>>> -#define CLK_MOUT_PERI_IP             17
>>> -#define CLK_DOUT_SHARED0_DIV3                18
>>> -#define CLK_DOUT_SHARED0_DIV2                19
>>> -#define CLK_DOUT_SHARED1_DIV3                20
>>> -#define CLK_DOUT_SHARED1_DIV2                21
>>> -#define CLK_DOUT_SHARED0_DIV4                22
>>> -#define CLK_DOUT_SHARED1_DIV4                23
>>> -#define CLK_DOUT_CORE_BUS            24
>>> -#define CLK_DOUT_CORE_CCI            25
>>> -#define CLK_DOUT_CORE_MMC_EMBD               26
>>> -#define CLK_DOUT_CORE_SSS            27
>>> -#define CLK_DOUT_DPU                 28
>>> -#define CLK_DOUT_HSI_BUS             29
>>> -#define CLK_DOUT_HSI_MMC_CARD                30
>>> -#define CLK_DOUT_HSI_USB20DRD                31
>>> -#define CLK_DOUT_PERI_BUS            32
>>> -#define CLK_DOUT_PERI_UART           33
>>> -#define CLK_DOUT_PERI_IP             34
>>> -#define CLK_GOUT_CORE_BUS            35
>>> -#define CLK_GOUT_CORE_CCI            36
>>> -#define CLK_GOUT_CORE_MMC_EMBD               37
>>> -#define CLK_GOUT_CORE_SSS            38
>>> -#define CLK_GOUT_DPU                 39
>>> -#define CLK_GOUT_HSI_BUS             40
>>> -#define CLK_GOUT_HSI_MMC_CARD                41
>>> -#define CLK_GOUT_HSI_USB20DRD                42
>>> -#define CLK_GOUT_PERI_BUS            43
>>> -#define CLK_GOUT_PERI_UART           44
>>> -#define CLK_GOUT_PERI_IP             45
>>> -#define TOP_NR_CLK                   46
>>> +#define CLK_MOUT_CLKCMU_APM_BUS              7
>>> +#define CLK_MOUT_CORE_BUS            8
>>
>>
>> Basically, you can never change the already defined clock id
>> in nclude/dt-bindings/clock/*.h because of supporting
>> the compatibility of dtb files which were using the
>> already defined clock id instead of changed clock id
>>
>> If you want to add new clock with new clock id,
>> you have to define the new clock id at the end of defined clock
>> like the next of CLK_GOUT_PERI_IP for TOP domain case.
>>
> 
> Thanks for explaining that in details, Chanwoo. As Krzysztof pointed
> out, right now there are no dts users of this clock driver in upstream
> kernel (I didn't submit it yet), so it'd nice if this one can be taken
> as is. In future I'll increment the last clock ID. Guess it was my OCD
> talking, trying to keep all clock IDs grouped by clock type :)

Yes, I think now breaking DTBs is allowed because this is a new driver
and there are no users of it. Kind of exception.

Best regards,
Krzysztof



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