* Re: [PATCH V3 2/4] soc: mediatek: pwrap: add pwrap for mt6797 SoCs
[not found] ` <20180323083238.13569-3-argus.lin@mediatek.com>
@ 2018-04-17 15:22 ` Matthias Brugger
0 siblings, 0 replies; 3+ messages in thread
From: Matthias Brugger @ 2018-04-17 15:22 UTC (permalink / raw)
To: argus.lin, Rob Herring, Mark Rutland, Catalin Marinas, Will Deacon
Cc: Chenglin Xu, Sean Wang, wsd_upstream, henryc.chen, flora.fu,
Chen Zhong, Christophe Jaillet, shailendra . v, devicetree,
linux-kernel, linux-arm-kernel, linux-mediatek
On 03/23/2018 09:32 AM, argus.lin@mediatek.com wrote:
> From: Argus Lin <argus.lin@mediatek.com>
>
> mt6797 is a highly integrated SoCs, it uses mt6351 for power
> management. We need to add pwrap support to access mt6351.
> Pwrap of mt6797 also add new feature include starvation and
> request exception interrupt, dynamic starvation priority
> adjustment mechanism. Pwrap of mt6797 support capability
> like dcm, priority selection and INT1 interrupt.
>
> Signed-off-by: Argus Lin <argus.lin@mediatek.com>
> ---
As already said in the last version, you have to split that in two patches.
1. introduce CAPss
2. add mt6797 support
More comments inline, please see below.
> drivers/soc/mediatek/mtk-pmic-wrap.c | 199 +++++++++++++++++++++++++++++++++--
> 1 file changed, 189 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index e9e054a15b7d..d0a0a3d7e88d 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -76,6 +76,13 @@
> #define PWRAP_SLV_CAP_SECURITY BIT(2)
> #define HAS_CAP(_c, _x) (((_c) & (_x)) == (_x))
>
> +/* Group of bits used for shown pwrap capability */
> +#define PWRAP_CAP_BRIDGE BIT(0)
> +#define PWRAP_CAP_RESET BIT(1)
> +#define PWRAP_CAP_DCM BIT(2)
> +#define PWRAP_CAP_PRIORITY_SEL BIT(3)
> +#define PWRAP_CAP_INT1_EN BIT(4)
> +
> /* defines for slave device wrapper registers */
> enum dew_regs {
> PWRAP_DEW_BASE,
> @@ -278,6 +285,30 @@ enum pwrap_regs {
> PWRAP_DVFS_WDATA7,
> PWRAP_SPMINF_STA,
> PWRAP_CIPHER_EN,
> +
> + /* MT6797 series regs */
> + PWRAP_INT1_EN,
> + PWRAP_INT1_FLG_RAW,
> + PWRAP_INT1_FLG,
> + PWRAP_INT1_CLR,
> + PWRAP_PRIORITY_USER_SEL_0,
> + PWRAP_PRIORITY_USER_SEL_1,
> + PWRAP_ARBITER_OUT_SEL_0,
> + PWRAP_ARBITER_OUT_SEL_1,
> + PWRAP_STARV_COUNTER_0,
> + PWRAP_STARV_COUNTER_1,
> + PWRAP_STARV_COUNTER_2,
> + PWRAP_STARV_COUNTER_3,
> + PWRAP_STARV_COUNTER_4,
> + PWRAP_STARV_COUNTER_5,
> + PWRAP_STARV_COUNTER_6,
> + PWRAP_STARV_COUNTER_7,
> + PWRAP_STARV_COUNTER_8,
> + PWRAP_STARV_COUNTER_9,
> + PWRAP_STARV_COUNTER_10,
> + PWRAP_STARV_COUNTER_11,
> + PWRAP_STARV_COUNTER_12,
> + PWRAP_STARV_COUNTER_13,
> };
>
> static int mt2701_regs[] = {
> @@ -366,6 +397,61 @@ static int mt2701_regs[] = {
> [PWRAP_ADC_RDATA_ADDR2] = 0x154,
> };
>
> +static int mt6797_regs[] = {
> + [PWRAP_MUX_SEL] = 0x0,
> + [PWRAP_WRAP_EN] = 0x4,
> + [PWRAP_DIO_EN] = 0x8,
> + [PWRAP_SIDLY] = 0xC,
> + [PWRAP_RDDMY] = 0x10,
> + [PWRAP_CSHEXT_WRITE] = 0x18,
> + [PWRAP_CSHEXT_READ] = 0x1C,
> + [PWRAP_CSLEXT_START] = 0x20,
> + [PWRAP_CSLEXT_END] = 0x24,
> + [PWRAP_STAUPD_PRD] = 0x28,
> + [PWRAP_HARB_HPRIO] = 0x50,
> + [PWRAP_HIPRIO_ARB_EN] = 0x54,
> + [PWRAP_MAN_EN] = 0x60,
> + [PWRAP_MAN_CMD] = 0x64,
> + [PWRAP_WACS0_EN] = 0x70,
> + [PWRAP_WACS1_EN] = 0x84,
> + [PWRAP_WACS2_EN] = 0x98,
> + [PWRAP_INIT_DONE2] = 0x9C,
> + [PWRAP_WACS2_CMD] = 0xA0,
> + [PWRAP_WACS2_RDATA] = 0xA4,
> + [PWRAP_WACS2_VLDCLR] = 0xA8,
> + [PWRAP_INT_EN] = 0xC0,
> + [PWRAP_INT_FLG_RAW] = 0xC4,
> + [PWRAP_INT_FLG] = 0xC8,
> + [PWRAP_INT_CLR] = 0xCC,
> + [PWRAP_INT1_EN] = 0xD0,
> + [PWRAP_INT1_FLG_RAW] = 0xD4,
> + [PWRAP_INT1_FLG] = 0xD8,
> + [PWRAP_INT1_CLR] = 0xDC,
> + [PWRAP_TIMER_EN] = 0xF4,
> + [PWRAP_WDT_UNIT] = 0xFC,
> + [PWRAP_WDT_SRC_EN] = 0x100,
> + [PWRAP_DCM_EN] = 0x1CC,
> + [PWRAP_DCM_DBC_PRD] = 0x1D4,
> + [PWRAP_PRIORITY_USER_SEL_0] = 0x288,
> + [PWRAP_PRIORITY_USER_SEL_1] = 0x28C,
> + [PWRAP_ARBITER_OUT_SEL_0] = 0x290,
> + [PWRAP_ARBITER_OUT_SEL_1] = 0x294,
> + [PWRAP_STARV_COUNTER_0] = 0x298,
> + [PWRAP_STARV_COUNTER_1] = 0x29C,
> + [PWRAP_STARV_COUNTER_2] = 0x2A0,
> + [PWRAP_STARV_COUNTER_3] = 0x2A4,
> + [PWRAP_STARV_COUNTER_4] = 0x2A8,
> + [PWRAP_STARV_COUNTER_5] = 0x2AC,
> + [PWRAP_STARV_COUNTER_6] = 0x2B0,
> + [PWRAP_STARV_COUNTER_7] = 0x2B4,
> + [PWRAP_STARV_COUNTER_8] = 0x2B8,
> + [PWRAP_STARV_COUNTER_9] = 0x2BC,
> + [PWRAP_STARV_COUNTER_10] = 0x2C0,
> + [PWRAP_STARV_COUNTER_11] = 0x2C4,
> + [PWRAP_STARV_COUNTER_12] = 0x2C8,
> + [PWRAP_STARV_COUNTER_13] = 0x2CC,
> +};
> +
> static int mt7622_regs[] = {
> [PWRAP_MUX_SEL] = 0x0,
> [PWRAP_WRAP_EN] = 0x4,
> @@ -641,6 +727,7 @@ enum pmic_type {
>
> enum pwrap_type {
> PWRAP_MT2701,
> + PWRAP_MT6797,
> PWRAP_MT7622,
> PWRAP_MT8135,
> PWRAP_MT8173,
> @@ -681,9 +768,12 @@ struct pmic_wrapper_type {
> enum pwrap_type type;
> u32 arb_en_all;
> u32 int_en_all;
> + u32 int1_en_all;
> u32 spi_w;
> u32 wdt_src;
> unsigned int has_bridge:1;
That's not needed anymore, we do this with PWRAP_CAP_BRIDGE now, please delete.
Same of course in the instances of pmic_wrapper_type below.
> + /* Flags indicating the capability for the target pwrap */
> + u32 caps;
We could use u8 here for now. Only 4 CAPs up to now.
> int (*init_reg_clock)(struct pmic_wrapper *wrp);
> int (*init_soc_specific)(struct pmic_wrapper *wrp);
> };
> @@ -998,6 +1088,12 @@ static void pwrap_init_chip_select_ext(struct pmic_wrapper *wrp, u8 hext_write,
> static int pwrap_common_init_reg_clock(struct pmic_wrapper *wrp)
> {
> switch (wrp->master->type) {
> + case PWRAP_MT6797:
> + pwrap_writel(wrp, 0x8, PWRAP_RDDMY);
> + pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_RDDMY_NO],
> + 0x8);
> + pwrap_init_chip_select_ext(wrp, 0x88, 0x55, 3, 0);
> + break;
> case PWRAP_MT8173:
> pwrap_init_chip_select_ext(wrp, 0, 4, 2, 2);
> break;
> @@ -1068,11 +1164,14 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
> break;
> case PWRAP_MT2701:
> case PWRAP_MT8173:
> + case PWRAP_MT6797:
> pwrap_writel(wrp, 1, PWRAP_CIPHER_EN);
> break;
> case PWRAP_MT7622:
> pwrap_writel(wrp, 0, PWRAP_CIPHER_EN);
> break;
> + default:
> + break;
> }
>
> /* Config cipher mode @PMIC */
> @@ -1226,6 +1325,27 @@ static int pwrap_mt7622_init_soc_specific(struct pmic_wrapper *wrp)
> return 0;
> }
>
> +static int pwrap_set_starvation(struct pmic_wrapper *wrp)
> +{
> + pwrap_writel(wrp, 0x0007, PWRAP_HARB_HPRIO);
Reading the public available datasheet, it is not clear to me what you are
trying to achieve here. From my understanding MDINF has a higher priority then
C2kINF, and the latter a higher priority then MD_DVFSINF. So bumping these to 1
doesn't change anything in the end.
Why do we need this?
If we really need that, then please, no magic values here. Better explain at
least in a comment which components get a higher priority.
> + pwrap_writel(wrp, 0x0402, PWRAP_STARV_COUNTER_0);
> + pwrap_writel(wrp, 0x0402, PWRAP_STARV_COUNTER_1);
> + pwrap_writel(wrp, 0x0403, PWRAP_STARV_COUNTER_2);
> + pwrap_writel(wrp, 0x0414, PWRAP_STARV_COUNTER_3);
> + pwrap_writel(wrp, 0x0420, PWRAP_STARV_COUNTER_4);
> + pwrap_writel(wrp, 0x0420, PWRAP_STARV_COUNTER_5);
> + pwrap_writel(wrp, 0x0420, PWRAP_STARV_COUNTER_6);
> + pwrap_writel(wrp, 0x0428, PWRAP_STARV_COUNTER_7);
> + pwrap_writel(wrp, 0x0428, PWRAP_STARV_COUNTER_8);
> + pwrap_writel(wrp, 0x0417, PWRAP_STARV_COUNTER_9);
> + pwrap_writel(wrp, 0x0563, PWRAP_STARV_COUNTER_10);
> + pwrap_writel(wrp, 0x047c, PWRAP_STARV_COUNTER_11);
> + pwrap_writel(wrp, 0x0740, PWRAP_STARV_COUNTER_12);
> + pwrap_writel(wrp, 0x0740, PWRAP_STARV_COUNTER_13);
Can you somehow make clear that 0x0400 actually enables starvation mechanism.
As above try to minimize magic values.
> +
> + return 0;
> +}
> +
> static int pwrap_init(struct pmic_wrapper *wrp)
> {
> int ret;
> @@ -1298,7 +1418,7 @@ static int pwrap_init(struct pmic_wrapper *wrp)
> pwrap_writel(wrp, 1, PWRAP_INIT_DONE0);
> pwrap_writel(wrp, 1, PWRAP_INIT_DONE1);
>
> - if (wrp->master->has_bridge) {
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_BRIDGE)) {
> writel(1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_INIT_DONE3);
> writel(1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_INIT_DONE4);
> }
> @@ -1317,6 +1437,15 @@ static irqreturn_t pwrap_interrupt(int irqno, void *dev_id)
>
> pwrap_writel(wrp, 0xffffffff, PWRAP_INT_CLR);
>
> + /* If we support INT1 interrupt, we also need to clear it */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN)) {
> + rdata = pwrap_readl(wrp, PWRAP_INT1_FLG);
> +
> + dev_err(wrp->dev, "unexpected interrupt int1=0x%x\n", rdata);
> +
> + pwrap_writel(wrp, rdata, PWRAP_INT1_CLR);
> + }
> +
> return IRQ_HANDLED;
> }
>
> @@ -1391,9 +1520,11 @@ static const struct pmic_wrapper_type pwrap_mt2701 = {
> .type = PWRAP_MT2701,
> .arb_en_all = 0x3f,
> .int_en_all = ~(u32)(BIT(31) | BIT(2)),
> + .int1_en_all = 0,
> .spi_w = PWRAP_MAN_CMD_SPI_WRITE_NEW,
> .wdt_src = PWRAP_WDT_SRC_MASK_ALL,
> .has_bridge = 0,
As said above, has_bridge should be deleted.
> + .caps = PWRAP_CAP_RESET | PWRAP_CAP_DCM,
> .init_reg_clock = pwrap_mt2701_init_reg_clock,
> .init_soc_specific = pwrap_mt2701_init_soc_specific,
> };
> @@ -1403,9 +1534,11 @@ static const struct pmic_wrapper_type pwrap_mt7622 = {
> .type = PWRAP_MT7622,
> .arb_en_all = 0xff,
> .int_en_all = ~(u32)BIT(31),
> + .int1_en_all = 0,
> .spi_w = PWRAP_MAN_CMD_SPI_WRITE,
> .wdt_src = PWRAP_WDT_SRC_MASK_ALL,
> .has_bridge = 0,
> + .caps = PWRAP_CAP_RESET | PWRAP_CAP_DCM,
> .init_reg_clock = pwrap_common_init_reg_clock,
> .init_soc_specific = pwrap_mt7622_init_soc_specific,
> };
> @@ -1415,9 +1548,11 @@ static const struct pmic_wrapper_type pwrap_mt8135 = {
> .type = PWRAP_MT8135,
> .arb_en_all = 0x1ff,
> .int_en_all = ~(u32)(BIT(31) | BIT(1)),
> + .int1_en_all = 0,
> .spi_w = PWRAP_MAN_CMD_SPI_WRITE,
> .wdt_src = PWRAP_WDT_SRC_MASK_ALL,
> .has_bridge = 1,
> + .caps = PWRAP_CAP_BRIDGE | PWRAP_CAP_RESET | PWRAP_CAP_DCM,
> .init_reg_clock = pwrap_common_init_reg_clock,
> .init_soc_specific = pwrap_mt8135_init_soc_specific,
> };
> @@ -1427,13 +1562,29 @@ static const struct pmic_wrapper_type pwrap_mt8173 = {
> .type = PWRAP_MT8173,
> .arb_en_all = 0x3f,
> .int_en_all = ~(u32)(BIT(31) | BIT(1)),
> + .int1_en_all = 0,
> .spi_w = PWRAP_MAN_CMD_SPI_WRITE,
> .wdt_src = PWRAP_WDT_SRC_MASK_NO_STAUPD,
> .has_bridge = 0,
> + .caps = PWRAP_CAP_RESET | PWRAP_CAP_DCM,
> .init_reg_clock = pwrap_common_init_reg_clock,
> .init_soc_specific = pwrap_mt8173_init_soc_specific,
> };
>
> +static const struct pmic_wrapper_type pwrap_mt6797 = {
> + .regs = mt6797_regs,
> + .type = PWRAP_MT6797,
> + .arb_en_all = 0x01fff,
> + .int_en_all = 0xfffffffd,
> + .int1_en_all = 0x0001ffff,
> + .spi_w = PWRAP_MAN_CMD_SPI_WRITE,
> + .wdt_src = PWRAP_WDT_SRC_MASK_ALL,
> + .has_bridge = 0,
> + .caps = PWRAP_CAP_DCM | PWRAP_CAP_PRIORITY_SEL | PWRAP_CAP_INT1_EN,
> + .init_reg_clock = pwrap_common_init_reg_clock,
> + .init_soc_specific = NULL,
> +};
> +
> static const struct of_device_id of_pwrap_match_tbl[] = {
> {
> .compatible = "mediatek,mt2701-pwrap",
> @@ -1448,6 +1599,9 @@ static const struct of_device_id of_pwrap_match_tbl[] = {
> .compatible = "mediatek,mt8173-pwrap",
> .data = &pwrap_mt8173,
> }, {
> + .compatible = "mediatek,mt6797-pwrap",
> + .data = &pwrap_mt6797,
> + }, {
> /* sentinel */
> }
> };
> @@ -1491,14 +1645,16 @@ static int pwrap_probe(struct platform_device *pdev)
> if (IS_ERR(wrp->base))
> return PTR_ERR(wrp->base);
>
> - wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
> - if (IS_ERR(wrp->rstc)) {
> - ret = PTR_ERR(wrp->rstc);
> - dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
> - return ret;
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_RESET)) {
> + wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
> + if (IS_ERR(wrp->rstc)) {
> + ret = PTR_ERR(wrp->rstc);
> + dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
> + return ret;
> + }
> }
>
> - if (wrp->master->has_bridge) {
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_BRIDGE)) {
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> "pwrap-bridge");
> wrp->bridge_base = devm_ioremap_resource(wrp->dev, res);
> @@ -1529,6 +1685,16 @@ static int pwrap_probe(struct platform_device *pdev)
> return PTR_ERR(wrp->clk_wrap);
> }
>
> + /* Add priority adjust setting, it used to avoid starvation */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_PRIORITY_SEL)) {
> + pwrap_writel(wrp, 0x6543C210, PWRAP_PRIORITY_USER_SEL_0);
> + pwrap_writel(wrp, 0xFEDBA987, PWRAP_PRIORITY_USER_SEL_1);
> + pwrap_writel(wrp, 0x87654210, PWRAP_ARBITER_OUT_SEL_0);
> + pwrap_writel(wrp, 0xFED3CBA9, PWRAP_ARBITER_OUT_SEL_1);
> +
> + pwrap_set_starvation(wrp);
> + }
> +
> ret = clk_prepare_enable(wrp->clk_spi);
> if (ret)
> return ret;
> @@ -1537,9 +1703,16 @@ static int pwrap_probe(struct platform_device *pdev)
> if (ret)
> goto err_out1;
>
> - /* Enable internal dynamic clock */
> - pwrap_writel(wrp, 1, PWRAP_DCM_EN);
> - pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
> + /*
> + * add dcm capability check
> + */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_DCM)) {
> + if (wrp->master->type == PWRAP_MT6797)
> + pwrap_writel(wrp, 3, PWRAP_DCM_EN);
> + else
> + pwrap_writel(wrp, 1, PWRAP_DCM_EN);
> + pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
bike shedding alarm:
I'd add a newline after the else branch.
Thanks!
Matthias
> + }
>
> /*
> * The PMIC could already be initialized by the bootloader.
> @@ -1568,6 +1741,12 @@ static int pwrap_probe(struct platform_device *pdev)
> pwrap_writel(wrp, wrp->master->wdt_src, PWRAP_WDT_SRC_EN);
> pwrap_writel(wrp, 0x1, PWRAP_TIMER_EN);
> pwrap_writel(wrp, wrp->master->int_en_all, PWRAP_INT_EN);
> + /*
> + * We add INT1 interrupt to handle starvation and request exception
> + * If we support it, we should enable them here.
> + */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN))
> + pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
>
> irq = platform_get_irq(pdev, 0);
> ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
> --
> 2.12.5
>
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