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Date: Mon, 27 Aug 2018 15:51:21 -0700
From: Andrey Smirnov <andrew.smirnov@...il.com>
To: Anson Huang <Anson.Huang@....com>
Cc: Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Sascha Hauer <kernel@...gutronix.de>,
Fabio Estevam <fabio.estevam@....com>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>, Linux-imx@....com
Subject: Re: [PATCH 2/2] soc: imx: gpcv2: make pgc driver more generic for
other i.MX platforms
On Sun, Aug 5, 2018 at 11:45 PM Anson Huang <Anson.Huang@....com> wrote:
>
> i.MX8MQ and i.MX8MM share same gpc module with i.MX7D, they
> can reuse gpcv2 pgc driver for power domain control, this
> patch renames all functions and structure definitions started
> with "imx7" to "imx", and check machine type to pass platform
> specific power domain data for power domain driver, thus make
> gpcv2 pgc driver more generic for i.MX platforms.
>
Just for the sake of
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> drivers/soc/imx/gpcv2.c | 68 +++++++++++++++++++++++++++++--------------------
> 1 file changed, 40 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
> index 0e31465..0e33cb5 100644
> --- a/drivers/soc/imx/gpcv2.c
> +++ b/drivers/soc/imx/gpcv2.c
> @@ -53,7 +53,7 @@
>
> #define GPC_PGC_CTRL_PCR BIT(0)
>
> -struct imx7_pgc_domain {
> +struct imx_pgc_domain {
> struct generic_pm_domain genpd;
> struct regmap *regmap;
> struct regulator *regulator;
> @@ -69,11 +69,11 @@ struct imx7_pgc_domain {
> struct device *dev;
> };
>
> -static int imx7_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
> +static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
> bool on)
> {
> - struct imx7_pgc_domain *domain = container_of(genpd,
> - struct imx7_pgc_domain,
> + struct imx_pgc_domain *domain = container_of(genpd,
> + struct imx_pgc_domain,
> genpd);
> unsigned int offset = on ?
> GPC_PU_PGC_SW_PUP_REQ : GPC_PU_PGC_SW_PDN_REQ;
> @@ -150,17 +150,17 @@ static int imx7_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
> return ret;
> }
>
> -static int imx7_gpc_pu_pgc_sw_pup_req(struct generic_pm_domain *genpd)
> +static int imx_gpc_pu_pgc_sw_pup_req(struct generic_pm_domain *genpd)
> {
> - return imx7_gpc_pu_pgc_sw_pxx_req(genpd, true);
> + return imx_gpc_pu_pgc_sw_pxx_req(genpd, true);
> }
>
> -static int imx7_gpc_pu_pgc_sw_pdn_req(struct generic_pm_domain *genpd)
> +static int imx_gpc_pu_pgc_sw_pdn_req(struct generic_pm_domain *genpd)
> {
> - return imx7_gpc_pu_pgc_sw_pxx_req(genpd, false);
> + return imx_gpc_pu_pgc_sw_pxx_req(genpd, false);
> }
>
> -static const struct imx7_pgc_domain imx7_pgc_domains[] = {
> +static const struct imx_pgc_domain imx7_pgc_domains[] = {
> [IMX7_POWER_DOMAIN_MIPI_PHY] = {
> .genpd = {
> .name = "mipi-phy",
> @@ -198,9 +198,9 @@ static const struct imx7_pgc_domain imx7_pgc_domains[] = {
> },
> };
>
> -static int imx7_pgc_domain_probe(struct platform_device *pdev)
> +static int imx_pgc_domain_probe(struct platform_device *pdev)
> {
> - struct imx7_pgc_domain *domain = pdev->dev.platform_data;
> + struct imx_pgc_domain *domain = pdev->dev.platform_data;
> int ret;
>
> domain->dev = &pdev->dev;
> @@ -233,9 +233,9 @@ static int imx7_pgc_domain_probe(struct platform_device *pdev)
> return ret;
> }
>
> -static int imx7_pgc_domain_remove(struct platform_device *pdev)
> +static int imx_pgc_domain_remove(struct platform_device *pdev)
> {
> - struct imx7_pgc_domain *domain = pdev->dev.platform_data;
> + struct imx_pgc_domain *domain = pdev->dev.platform_data;
>
> of_genpd_del_provider(domain->dev->of_node);
> pm_genpd_remove(&domain->genpd);
> @@ -243,23 +243,24 @@ static int imx7_pgc_domain_remove(struct platform_device *pdev)
> return 0;
> }
>
> -static const struct platform_device_id imx7_pgc_domain_id[] = {
> - { "imx7-pgc-domain", },
> +static const struct platform_device_id imx_pgc_domain_id[] = {
> + { "imx-pgc-domain", },
> { },
> };
>
> -static struct platform_driver imx7_pgc_domain_driver = {
> +static struct platform_driver imx_pgc_domain_driver = {
> .driver = {
> - .name = "imx7-pgc",
> + .name = "imx-pgc",
> },
> - .probe = imx7_pgc_domain_probe,
> - .remove = imx7_pgc_domain_remove,
> - .id_table = imx7_pgc_domain_id,
> + .probe = imx_pgc_domain_probe,
> + .remove = imx_pgc_domain_remove,
> + .id_table = imx_pgc_domain_id,
> };
> -builtin_platform_driver(imx7_pgc_domain_driver)
> +builtin_platform_driver(imx_pgc_domain_driver)
>
> static int imx_gpcv2_probe(struct platform_device *pdev)
> {
> + static const struct imx_pgc_domain *imx_pgc_domains;
> static const struct regmap_range yes_ranges[] = {
> regmap_reg_range(GPC_LPCR_A_CORE_BSC,
> GPC_M4_PU_PDN_FLG),
> @@ -287,6 +288,7 @@ static int imx_gpcv2_probe(struct platform_device *pdev)
> struct regmap *regmap;
> struct resource *res;
> void __iomem *base;
> + int pgc_max_index;
> int ret;
>
> pgc_np = of_get_child_by_name(dev->of_node, "pgc");
> @@ -307,9 +309,19 @@ static int imx_gpcv2_probe(struct platform_device *pdev)
> return ret;
> }
>
> + if (of_machine_is_compatible("fsl,imx7d")) {
> + pgc_max_index = ARRAY_SIZE(imx7_pgc_domains);
> + imx_pgc_domains = imx7_pgc_domains;
> + }
Is there any reason to do this explicit call to
of_machine_is_compatible() as opposed to passing necessary data via
.data in imx_gpcv2_dt_ids[]? The latter seems like a more
straightforward way of passing variant specific driver info
> +
> + if (!imx_pgc_domains) {
> + dev_err(&pdev->dev, "no device match found\n");
> + return -ENODEV;
> + }
And doing so would also allow you to drop the check above.
Other that this seems like a reasonable change:
Acked-by: Andrey Smirnov <andrew.smirnov@...il.com>
Thanks,
Andrey Smirnov
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