[U-Boot] [PATCH v3 3/6] Exynos542x: Add and enable get_periph_rate support
Akshay Saraswat
akshay.s at samsung.com
Mon Feb 2 05:27:40 CET 2015
Hi,
>Hi, All.
>
>On 01/28/2015 02:55 PM, Joonyoung Shim wrote:
>> Hi Simon,
>>
>> On 01/28/2015 02:15 PM, Simon Glass wrote:
>>> Hi Joonyoung,
>>>
>>> On 27 January 2015 at 22:12, Joonyoung Shim <jy0922.shim at samsung.com> wrote:
>>>> Hi Simon,
>>>>
>>>> On 01/28/2015 02:01 PM, Simon Glass wrote:
>>>>> Hi Joonyoung,
>>>>>
>>>>> On 27 January 2015 at 21:46, Joonyoung Shim <jy0922.shim at samsung.com> wrote:
>>>>>> Hi Simon,
>>>>>>
>>>>>> On 01/28/2015 01:09 PM, Simon Glass wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> On 15 January 2015 at 23:09, Joonyoung Shim <jy0922.shim at samsung.com> wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> On 01/16/2015 02:48 PM, Akshay Saraswat wrote:
>>>>>>>>> We planned to fetch peripheral rate through one generic API per
>>>>>>>>> peripheral. These generic peripheral functions are in turn
>>>>>>>>> expected to fetch apt values from a function refactored as
>>>>>>>>> per SoC versions. This patch adds support for fetching peripheral
>>>>>>>>> rates for Exynos5420 and Exynos5800.
>>>>>>>>>
>>>>>>>>> Signed-off-by: Akshay Saraswat <akshay.s at samsung.com>
>>>>>>>>> ---
>>>>>>>>> Changes since v2:
>>>>>>>>> - Fixed enum and exynos542x_get_periph_rate switch.
>>>>>>>>> - Added checks for negative values in exynos542x_get_periph_rate.
>>>>>>>>>
>>>>>>>>> Changes since v1:
>>>>>>>>> - Changes suuport -> support in commit message.
>>>>>>>>> - Removed position change of exynos5420_get_pll_clk.
>>>>>>>>> - Removed #ifdef.
>>>>>>>>>
>>>>>>>>> arch/arm/cpu/armv7/exynos/clock.c | 151 +++++++++++++++++++++++++++++++--
>>>>>>>>> arch/arm/include/asm/arch-exynos/clk.h | 3 +
>>>>>>>>> 2 files changed, 147 insertions(+), 7 deletions(-)
>>>>>>>
>>>>>>> What else needs to be done to get this applied, please?
>>>>>>>
>>>>>>
>>>>>> As i said, current this patch has some problem like mask bits, so eMMC
>>>>>> doesn't work normally.
>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
>>>>>>>>> index 5dc9ed2..ee6c13b 100644
>>>>>>>>> --- a/arch/arm/cpu/armv7/exynos/clock.c
>>>>>>>>> +++ b/arch/arm/cpu/armv7/exynos/clock.c
>>>>>>>>> @@ -27,7 +27,7 @@ struct clk_bit_info {
>>>>>>>>> };
>>>>>>>>>
>>>>>>>>> /* periph_id src_bit div_bit prediv_bit */
>>>>>>>>> -static struct clk_bit_info clk_bit_info[] = {
>>>>>>>>> +static struct clk_bit_info exynos5_bit_info[] = {
>>>>>>>>> {PERIPH_ID_UART0, 0, 0, -1},
>>>>>>>>> {PERIPH_ID_UART1, 4, 4, -1},
>>>>>>>>> {PERIPH_ID_UART2, 8, 8, -1},
>>>>>>>>> @@ -61,6 +61,42 @@ static struct clk_bit_info clk_bit_info[] = {
>>>>>>>>> {PERIPH_ID_NONE, -1, -1, -1},
>>>>>>>>> };
>>>>>>>>>
>>>>>>>>> +static struct clk_bit_info exynos542x_bit_info[] = {
>>>>>>>>> + {PERIPH_ID_UART0, 4, 8, -1},
>>>>>>>>> + {PERIPH_ID_UART1, 8, 12, -1},
>>>>>>>>> + {PERIPH_ID_UART2, 12, 16, -1},
>>>>>>>>> + {PERIPH_ID_UART3, 16, 20, -1},
>>>>>>>>> + {PERIPH_ID_I2C0, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C1, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C2, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C3, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C4, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C5, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C6, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C7, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_SPI0, 20, 20, 8},
>>>>>>>>> + {PERIPH_ID_SPI1, 24, 24, 16},
>>>>>>>>> + {PERIPH_ID_SPI2, 28, 28, 24},
>>>>>>>>> + {PERIPH_ID_SDMMC0, 0, 0, -1},
>>>>>>>>> + {PERIPH_ID_SDMMC1, 4, 10, -1},
>>>>>>>>> + {PERIPH_ID_SDMMC2, 8, 20, -1},
>>>>>>>>> + {PERIPH_ID_I2C8, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2C9, -1, 8, -1},
>>>>>>>>> + {PERIPH_ID_I2S0, 0, 0, 4},
>>>>>>>>> + {PERIPH_ID_I2S1, 4, 12, 16},
>>>>>>>>> + {PERIPH_ID_SPI3, 12, 16, 0},
>>>>>>>>> + {PERIPH_ID_SPI4, 16, 20, 8},
>>>>>>>>> + {PERIPH_ID_SDMMC4, 16, 0, 8},
>>>>>>>>> + {PERIPH_ID_PWM0, 24, 28, -1},
>>>>>>>>> + {PERIPH_ID_PWM1, 24, 28, -1},
>>>>>>>>> + {PERIPH_ID_PWM2, 24, 28, -1},
>>>>>>>>> + {PERIPH_ID_PWM3, 24, 28, -1},
>>>>>>>>> + {PERIPH_ID_PWM4, 24, 28, -1},
>>>>>>>>> + {PERIPH_ID_I2C10, -1, 8, -1},
>>>>>>>>> +
>>>>>>>>> + {PERIPH_ID_NONE, -1, -1, -1},
>>>>>>>>> +};
>>>>>>>>> +
>>>>>>>>> /* Epll Clock division values to achive different frequency output */
>>>>>>>>> static struct set_epll_con_val exynos5_epll_div[] = {
>>>>>>>>> { 192000000, 0, 48, 3, 1, 0 },
>>>>>>>>> @@ -306,16 +342,22 @@ static unsigned long exynos542x_get_pll_clk(int pllreg)
>>>>>>>>> static struct clk_bit_info *get_clk_bit_info(int peripheral)
>>>>>>>>> {
>>>>>>>>> int i;
>>>>>>>>> + struct clk_bit_info *info;
>>>>>>>>>
>>>>>>>>> - for (i = 0; clk_bit_info[i].id != PERIPH_ID_NONE; i++) {
>>>>>>>>> - if (clk_bit_info[i].id == peripheral)
>>>>>>>>> + if (proid_is_exynos5420() || proid_is_exynos5800())
>>>>>>>>> + info = exynos542x_bit_info;
>>>>>>>>> + else
>>>>>>>>> + info = exynos5_bit_info;
>>>>>>>>> +
>>>>>>>>> + for (i = 0; info[i].id != PERIPH_ID_NONE; i++) {
>>>>>>>>> + if (info[i].id == peripheral)
>>>>>>>>> break;
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> - if (clk_bit_info[i].id == PERIPH_ID_NONE)
>>>>>>>>> + if (info[i].id == PERIPH_ID_NONE)
>>>>>>>>> debug("ERROR: Peripheral ID %d not found\n", peripheral);
>>>>>>>>>
>>>>>>>>> - return &clk_bit_info[i];
>>>>>>>>> + return &info[i];
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> static unsigned long exynos5_get_periph_rate(int peripheral)
>>>>>>>>> @@ -414,12 +456,107 @@ static unsigned long exynos5_get_periph_rate(int peripheral)
>>>>>>>>> return sub_clk;
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> +static unsigned long exynos542x_get_periph_rate(int peripheral)
>>>>>>>>> +{
>>>>>>>>> + struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
>>>>>>>>> + unsigned long sclk, sub_clk = 0;
>>>>>>>>> + unsigned int src, div, sub_div = 0;
>>>>>>>>> + struct exynos5420_clock *clk =
>>>>>>>>> + (struct exynos5420_clock *)samsung_get_base_clock();
>>>>>>>>> +
>>>>>>>>> + switch (peripheral) {
>>>>>>>>> + case PERIPH_ID_UART0:
>>>>>>>>> + case PERIPH_ID_UART1:
>>>>>>>>> + case PERIPH_ID_UART2:
>>>>>>>>> + case PERIPH_ID_UART3:
>>>>>>>>> + case PERIPH_ID_PWM0:
>>>>>>>>> + case PERIPH_ID_PWM1:
>>>>>>>>> + case PERIPH_ID_PWM2:
>>>>>>>>> + case PERIPH_ID_PWM3:
>>>>>>>>> + case PERIPH_ID_PWM4:
>>>>>>>>> + src = readl(&clk->src_peric0);
>>>>>>>>> + div = readl(&clk->div_peric0);
>>>>>>>>> + break;
>>>>>>>>> + case PERIPH_ID_SPI0:
>>>>>>>>> + case PERIPH_ID_SPI1:
>>>>>>>>> + case PERIPH_ID_SPI2:
>>>>>>>>> + src = readl(&clk->src_peric1);
>>>>>>>>> + div = readl(&clk->div_peric1);
>>>>>>>>> + sub_div = readl(&clk->div_peric4);
>>>>>>>>> + break;
>>>>>>>>> + case PERIPH_ID_SPI3:
>>>>>>>>> + case PERIPH_ID_SPI4:
>>>>>>>>> + src = readl(&clk->src_isp);
>>>>>>>>> + div = readl(&clk->div_isp1);
>>>>>>>>> + sub_div = readl(&clk->div_isp1);
>>>>>>>>> + break;
>>>>>>>>> + case PERIPH_ID_SDMMC0:
>>>>>>>>> + case PERIPH_ID_SDMMC1:
>>>>>>>>> + case PERIPH_ID_SDMMC2:
>>>>>>>>> + case PERIPH_ID_SDMMC3:
>>>>>>>>> + src = readl(&clk->src_fsys);
>>>>>>>>> + div = readl(&clk->div_fsys1);
>>>>>>>>> + break;
>>>>>>>>> + case PERIPH_ID_I2C0:
>>>>>>>>> + case PERIPH_ID_I2C1:
>>>>>>>>> + case PERIPH_ID_I2C2:
>>>>>>>>> + case PERIPH_ID_I2C3:
>>>>>>>>> + case PERIPH_ID_I2C4:
>>>>>>>>> + case PERIPH_ID_I2C5:
>>>>>>>>> + case PERIPH_ID_I2C6:
>>>>>>>>> + case PERIPH_ID_I2C7:
>>>>>>>>> + case PERIPH_ID_I2C8:
>>>>>>>>> + case PERIPH_ID_I2C9:
>>>>>>>>> + case PERIPH_ID_I2C10:
>>>>>>>>> + sclk = exynos542x_get_pll_clk(MPLL);
>>>>>>>>> + sub_div = ((readl(&clk->div_top1) >> bit_info->div_bit)
>>>>>>>>> + & 0x7) + 1;
>>>>>>>>> + return sclk / sub_div;
>>>>>>>>> + default:
>>>>>>>>> + debug("%s: invalid peripheral %d", __func__, peripheral);
>>>>>>>>> + return -1;
>>>>>>>>> + };
>>>>>>>>> +
>>>>>>>>> + if (bit_info->src_bit >= 0)
>>>>>>>>> + src = (src >> bit_info->src_bit) & 0xf;
>>>>>>>>> +
>>>>>>>>> + switch (src) {
>>>>>>>>> + case EXYNOS542x_SRC_MPLL:
>>>>>>>>> + sclk = exynos542x_get_pll_clk(MPLL);
>>>>>>>>> + break;
>>>>>>>>> + case EXYNOS542x_SRC_EPLL:
>>>>>>>>> + sclk = exynos542x_get_pll_clk(EPLL);
>>>>>>>>> + break;
>>>>>>>>> + case EXYNOS542x_SRC_RPLL:
>>>>>>>>> + sclk = exynos542x_get_pll_clk(RPLL);
>>>>>>>>> + break;
>>>>>>>>> + default:
>>>>>>>>> + return 0;
>>>>>>>>> + }
>>>>>>>>> +
>>>>>>>>
>>>>>>>> Odroid xu3 board uses SPLL as source clock for SDMMCx, please SPLL case.
>>>>>>>
>>>>>>> Perhaps this can be sorted out by the maintainer of that board? I'm
>>>>>>> not sure how we can deal with this other than a special case.
>>>>>>> Certainly Akshay is not going to know what to do here.
>>>>>>>
>>>>>>
>>>>>> I don't think this is special case, SPLL also can be used as source
>>>>>> clock like MPLL, EPLL and RPLL.
>>>>>>
>>>>>>>>
>>>>>>>>> + /* Ratio clock division for this peripheral */
>>>>>>>>> + if (bit_info->div_bit >= 0) {
>>>>>>>>> + div = (div >> bit_info->div_bit) & 0xf;
>>>>>>>>
>>>>>>>> Hmm, mask bits are different each peripheral, e.g. SDMMCx needs 0x3ff
>>>>>>>> mask bits.
>>>>>>>>
>>>>>>
>>>>>> Akshay, could you follow up this?
>>>>>
>>>>> Can you please issue a Reviewed-by/Tested-by for those patches you are
>>>>> happy with?
>>>>>
>>>>
>>>> Sure, i will reply Reviewed-by or Tested-by if he solves issues.
>>>
>>> OK, so are any of the patches OK now? Basically I'm not sure if you
>>> have more comments. It looks like 3-4 of them are OK, but I'm not
>>> sure.
>>>
>>
>> They are ok to me except 3, 5, 6 patches because if 3 patch isn't fixed
>> 5,6 patches are meaningless.
>
>Is Akshay working these? As Simon is mentioned, i want to know the plan..
>If Akshay is busy, i will rework these with patches based on Akshay.
>
Apologies for the delay.
I was on vacation and couldn't access mails outside office.
Will respin this set by EoD.
>Best Regards,
>Jaehoon Chung
>
>>
>> Thanks.
>>
Regards,
Akshay Saraswat
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