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Message-ID: <7a67a1f9-9cd1-103e-cfa1-e032f346e164@intel.com>
Date: Fri, 3 Aug 2018 16:17:03 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Srinath Mannam <srinath.mannam@...adcom.com>,
Ulf Hansson <ulf.hansson@...aro.org>,
Ray Jui <rjui@...adcom.com>,
Scott Branden <sbranden@...adcom.com>,
vikram.prakash@...adcom.com
Cc: bcm-kernel-feedback-list@...adcom.com, linux-mmc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] mmc: host: iproc: Add ACPI support to IPROC SDHCI
On 30/07/18 09:15, Srinath Mannam wrote:
> Add ACPI support to all IPROC SDHCI varients
>
> Signed-off-by: Srinath Mannam <srinath.mannam@...adcom.com>
> Reviewed-by: Ray Jui <ray.jui@...adcom.com>
> Reviewed-by: Scott Branden <scott.branden@...adcom.com>
> Reviewed-by: Vladimir Olovyannikov <vladimir.olovyannikov@...adcom.com>
One minor comment below, otherwise:
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
> drivers/mmc/host/Kconfig | 1 +
> drivers/mmc/host/sdhci-iproc.c | 63 +++++++++++++++++++++++++++++-------------
> 2 files changed, 45 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 0581c19..bc6702e 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -334,6 +334,7 @@ config MMC_SDHCI_IPROC
> tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
> depends on ARCH_BCM2835 || ARCH_BCM_IPROC || COMPILE_TEST
> depends on MMC_SDHCI_PLTFM
> + depends on OF || ACPI
> default ARCH_BCM_IPROC
> select MMC_SDHCI_IO_ACCESSORS
> help
> diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
> index d0e83db..abf5269 100644
> --- a/drivers/mmc/host/sdhci-iproc.c
> +++ b/drivers/mmc/host/sdhci-iproc.c
> @@ -15,6 +15,7 @@
> * iProc SDHCI platform driver
> */
>
> +#include <linux/acpi.h>
> #include <linux/delay.h>
> #include <linux/module.h>
> #include <linux/mmc/host.h>
> @@ -162,9 +163,19 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
> sdhci_iproc_writel(host, newval, reg & ~3);
> }
>
> +static unsigned int sdhci_iproc_get_max_clock(struct sdhci_host *host)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +
> + if (pltfm_host->clk)
> + return sdhci_pltfm_clk_get_max_clock(host);
> + else
> + return pltfm_host->clock;
> +}
> +
> static const struct sdhci_ops sdhci_iproc_ops = {
> .set_clock = sdhci_set_clock,
> - .get_max_clock = sdhci_pltfm_clk_get_max_clock,
> + .get_max_clock = sdhci_iproc_get_max_clock,
> .set_bus_width = sdhci_set_bus_width,
> .reset = sdhci_reset,
> .set_uhs_signaling = sdhci_set_uhs_signaling,
> @@ -178,7 +189,7 @@ static const struct sdhci_ops sdhci_iproc_32only_ops = {
> .write_w = sdhci_iproc_writew,
> .write_b = sdhci_iproc_writeb,
> .set_clock = sdhci_set_clock,
> - .get_max_clock = sdhci_pltfm_clk_get_max_clock,
> + .get_max_clock = sdhci_iproc_get_max_clock,
> .set_bus_width = sdhci_set_bus_width,
> .reset = sdhci_reset,
> .set_uhs_signaling = sdhci_set_uhs_signaling,
> @@ -256,19 +267,29 @@ static const struct of_device_id sdhci_iproc_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);
>
> +static const struct acpi_device_id sdhci_iproc_acpi_ids[] = {
> + { .id = "BRCM5871", .driver_data = (kernel_ulong_t)&iproc_cygnus_data },
> + { .id = "BRCM5872", .driver_data = (kernel_ulong_t)&iproc_data },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(acpi, sdhci_iproc_acpi_ids);
> +
> static int sdhci_iproc_probe(struct platform_device *pdev)
> {
> - const struct of_device_id *match;
> - const struct sdhci_iproc_data *iproc_data;
> + struct device *dev = &pdev->dev;
> + const struct sdhci_iproc_data *iproc_data = NULL;
> struct sdhci_host *host;
> struct sdhci_iproc_host *iproc_host;
> struct sdhci_pltfm_host *pltfm_host;
> int ret;
>
> - match = of_match_device(sdhci_iproc_of_match, &pdev->dev);
> - if (!match)
> - return -EINVAL;
> - iproc_data = match->data;
> + if (dev->of_node)
> + iproc_data = of_device_get_match_data(dev);
> + else if (has_acpi_companion(dev))
> + iproc_data = acpi_device_get_match_data(dev);
Can you use device_get_match_data() here
> +
> + if (!iproc_data)
> + return -ENODEV;
>
> host = sdhci_pltfm_init(pdev, iproc_data->pdata, sizeof(*iproc_host));
> if (IS_ERR(host))
> @@ -280,19 +301,21 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
> iproc_host->data = iproc_data;
>
> mmc_of_parse(host->mmc);
> - sdhci_get_of_property(pdev);
> + sdhci_get_property(pdev);
>
> host->mmc->caps |= iproc_host->data->mmc_caps;
>
> - pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
> - if (IS_ERR(pltfm_host->clk)) {
> - ret = PTR_ERR(pltfm_host->clk);
> - goto err;
> - }
> - ret = clk_prepare_enable(pltfm_host->clk);
> - if (ret) {
> - dev_err(&pdev->dev, "failed to enable host clk\n");
> - goto err;
> + if (dev->of_node) {
> + pltfm_host->clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(pltfm_host->clk)) {
> + ret = PTR_ERR(pltfm_host->clk);
> + goto err;
> + }
> + ret = clk_prepare_enable(pltfm_host->clk);
> + if (ret) {
> + dev_err(dev, "failed to enable host clk\n");
> + goto err;
> + }
> }
>
> if (iproc_host->data->pdata->quirks & SDHCI_QUIRK_MISSING_CAPS) {
> @@ -307,7 +330,8 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
> return 0;
>
> err_clk:
> - clk_disable_unprepare(pltfm_host->clk);
> + if (dev->of_node)
> + clk_disable_unprepare(pltfm_host->clk);
> err:
> sdhci_pltfm_free(pdev);
> return ret;
> @@ -317,6 +341,7 @@ static struct platform_driver sdhci_iproc_driver = {
> .driver = {
> .name = "sdhci-iproc",
> .of_match_table = sdhci_iproc_of_match,
> + .acpi_match_table = ACPI_PTR(sdhci_iproc_acpi_ids),
> .pm = &sdhci_pltfm_pmops,
> },
> .probe = sdhci_iproc_probe,
>
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