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Message-ID: <Yk1hTNYYY47Pau8/@pendragon.ideasonboard.com>
Date: Wed, 6 Apr 2022 12:45:48 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: djakov@...nel.org, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
linux-imx@....com, l.stach@...gutronix.de,
linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 5/5] soc: imx: imx8mp-blk-ctrl: introduce HSIO blk ctrl
noc settings
Hi Peng,
Thank you for the patch.
On Wed, Apr 06, 2022 at 04:23:30PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
>
> The out of reset value of HSIO NoC is not a valid value, we need
> set it to a correct value. We only need to set it after power on.
>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
> drivers/soc/imx/imx8mp-blk-ctrl.c | 74 +++++++++++++++++++++++++++++++
> 1 file changed, 74 insertions(+)
>
> diff --git a/drivers/soc/imx/imx8mp-blk-ctrl.c b/drivers/soc/imx/imx8mp-blk-ctrl.c
> index e832c007b063..929fd9b770ae 100644
> --- a/drivers/soc/imx/imx8mp-blk-ctrl.c
> +++ b/drivers/soc/imx/imx8mp-blk-ctrl.c
> @@ -12,6 +12,7 @@
> #include <linux/pm_domain.h>
> #include <linux/pm_runtime.h>
> #include <linux/regmap.h>
> +#include <linux/mfd/syscon.h>
>
> #include <dt-bindings/power/imx8mp-power.h>
>
> @@ -26,14 +27,24 @@ struct imx8mp_hsio_blk_ctrl {
> struct notifier_block power_nb;
> struct device *bus_power_dev;
> struct regmap *regmap;
> + struct regmap *noc_regmap;
> struct imx8mp_hsio_blk_ctrl_domain *domains;
> struct genpd_onecell_data onecell_data;
> };
>
> +struct imx8mp_hsio_blk_ctrl_noc_data {
> + u32 off;
> + u32 priority;
> + u32 mode;
> + u32 extctrl;
> +};
Maybe the data structure, and possibly the imx8mp_hsio_noc_set()
function, could be shared with imx8m-blk-ctrl.c ? It's much code, so if
it causes too much trouble, feel free to ignore.
The other comments on patch 4/5 apply to this one too.
> +
> +#define DOMAIN_MAX_NOC 2
> struct imx8mp_hsio_blk_ctrl_domain_data {
> const char *name;
> const char *clk_name;
> const char *gpc_name;
> + const struct imx8mp_hsio_blk_ctrl_noc_data *noc_data[DOMAIN_MAX_NOC];
> };
>
> struct imx8mp_hsio_blk_ctrl_domain {
> @@ -41,6 +52,7 @@ struct imx8mp_hsio_blk_ctrl_domain {
> struct clk *clk;
> struct device *power_dev;
> struct imx8mp_hsio_blk_ctrl *bc;
> + const struct imx8mp_hsio_blk_ctrl_domain_data *data;
> int id;
> };
>
> @@ -50,6 +62,27 @@ to_imx8mp_hsio_blk_ctrl_domain(struct generic_pm_domain *genpd)
> return container_of(genpd, struct imx8mp_hsio_blk_ctrl_domain, genpd);
> }
>
> +static int imx8mp_hsio_noc_set(struct imx8mp_hsio_blk_ctrl_domain *domain)
> +{
> + const struct imx8mp_hsio_blk_ctrl_domain_data *data = domain->data;
> + struct imx8mp_hsio_blk_ctrl *bc = domain->bc;
> + struct regmap *regmap = bc->noc_regmap;
> + int i;
> +
> + if (!data || !regmap)
> + return 0;
> +
> + for (i = 0; i < DOMAIN_MAX_NOC; i++) {
> + if (!data->noc_data[i])
> + continue;
> + regmap_write(regmap, data->noc_data[i]->off + 0x8, data->noc_data[i]->priority);
> + regmap_write(regmap, data->noc_data[i]->off + 0xc, data->noc_data[i]->mode);
> + regmap_write(regmap, data->noc_data[i]->off + 0x18, data->noc_data[i]->extctrl);
> + }
> +
> + return 0;
> +}
> +
> static int imx8mp_hsio_blk_ctrl_power_on(struct generic_pm_domain *genpd)
> {
> struct imx8mp_hsio_blk_ctrl_domain *domain =
> @@ -89,6 +122,8 @@ static int imx8mp_hsio_blk_ctrl_power_on(struct generic_pm_domain *genpd)
> goto clk_disable;
> }
>
> + imx8mp_hsio_noc_set(domain);
> +
> return 0;
>
> clk_disable:
> @@ -143,11 +178,39 @@ imx8m_blk_ctrl_xlate(struct of_phandle_args *args, void *data)
>
> static struct lock_class_key blk_ctrl_genpd_lock_class;
>
> +#define IMX8MP_HSIOBLK_NOC_PCIE 0
> +#define IMX8MP_HSIOBLK_USB1 1
> +#define IMX8MP_HSIOBLK_USB2 2
> +#define IMX8MP_HSIOBLK_PCIE 3
> +
> +static const struct imx8mp_hsio_blk_ctrl_noc_data imx8mp_hsio_noc_data[] = {
> + [IMX8MP_HSIOBLK_NOC_PCIE] = {
> + .off = 0x780,
> + .priority = 0x80000303,
> + },
> + [IMX8MP_HSIOBLK_USB1] = {
> + .off = 0x800,
> + .priority = 0x80000303,
> + },
> + [IMX8MP_HSIOBLK_USB2] = {
> + .off = 0x880,
> + .priority = 0x80000303,
> + },
> + [IMX8MP_HSIOBLK_PCIE] = {
> + .off = 0x900,
> + .priority = 0x80000303,
> + },
> +};
> +
> static const struct imx8mp_hsio_blk_ctrl_domain_data imx8mp_hsio_domain_data[] = {
> [IMX8MP_HSIOBLK_PD_USB] = {
> .name = "hsioblk-usb",
> .clk_name = "usb",
> .gpc_name = "usb",
> + .noc_data = {
> + &imx8mp_hsio_noc_data[IMX8MP_HSIOBLK_USB1],
> + &imx8mp_hsio_noc_data[IMX8MP_HSIOBLK_USB2]
> + },
> },
> [IMX8MP_HSIOBLK_PD_USB_PHY1] = {
> .name = "hsioblk-usb-phy1",
> @@ -161,6 +224,10 @@ static const struct imx8mp_hsio_blk_ctrl_domain_data imx8mp_hsio_domain_data[] =
> .name = "hsioblk-pcie",
> .clk_name = "pcie",
> .gpc_name = "pcie",
> + .noc_data = {
> + &imx8mp_hsio_noc_data[IMX8MP_HSIOBLK_NOC_PCIE],
> + &imx8mp_hsio_noc_data[IMX8MP_HSIOBLK_PCIE]
> + },
> },
> [IMX8MP_HSIOBLK_PD_PCIE_PHY] = {
> .name = "hsioblk-pcie-phy",
> @@ -215,6 +282,7 @@ static int imx8mp_hsio_blk_ctrl_probe(struct platform_device *pdev)
> int num_domains = ARRAY_SIZE(imx8mp_hsio_domain_data);
> struct device *dev = &pdev->dev;
> struct imx8mp_hsio_blk_ctrl *bc;
> + struct regmap *regmap;
> void __iomem *base;
> int i, ret;
>
> @@ -259,11 +327,17 @@ static int imx8mp_hsio_blk_ctrl_probe(struct platform_device *pdev)
> return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev),
> "failed to attach bus power domain\n");
>
> + regmap = syscon_regmap_lookup_by_compatible("fsl,imx8m-noc");
> + if (!IS_ERR(regmap))
> + bc->noc_regmap = regmap;
> +
> for (i = 0; i < num_domains; i++) {
> const struct imx8mp_hsio_blk_ctrl_domain_data *data =
> &imx8mp_hsio_domain_data[i];
> struct imx8mp_hsio_blk_ctrl_domain *domain = &bc->domains[i];
>
> + domain->data = data;
> +
> if (data->clk_name) {
> domain->clk = devm_clk_get(dev, data->clk_name);
> if (IS_ERR(domain->clk)) {
> --
> 2.25.1
>
--
Regards,
Laurent Pinchart
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