linux-kernel - [PATCH 01/16] mmc: sdhci-pltfm: Add sdhci_pltfm

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Date:   Fri, 11 Aug 2023 16:03:36 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Yangtao Li <frank.li@...o.com>
Cc:     Florian Fainelli <florian.fainelli@...adcom.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Kamal Dasu <kamal.dasu@...adcom.com>,
        Al Cooper <alcooperx@...il.com>,
        Michal Simek <michal.simek@....com>,
        Eugen Hristev <eugen.hristev@...labora.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Daniel Machon <daniel.machon@...rochip.com>,
        UNGLinuxDriver@...rochip.com,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Brian Norris <briannorris@...omium.org>,
        Ye Xingchen <ye.xingchen@....com.cn>,
        Brad Larson <blarson@....com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Sai Krishna Potthuri <sai.krishna.potthuri@....com>,
        Swati Agarwal <swati.agarwal@....com>,
        Andy Tang <andy.tang@....com>,
        Georgii Kruglov <georgy.kruglov@...dex.ru>,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Doug Brown <doug@...morgal.com>,
        Li Zetao <lizetao1@...wei.com>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 01/16] mmc: sdhci-pltfm: Add sdhci_pltfm_remove()

Add sdhci_pltfm_remove() to replace sdhci_pltfm_unregister().
The difference is that sdhci_pltfm_remove() does not do:
	clk_disable_unprepare(pltfm_host->clk);
which allows drivers to choose to use devm_clk_get_enabled() or
similar, for pltfm_host->clk.

Once all drivers using sdhci_pltfm_unregister() have been amended to use
sdhci_pltfm_remove() instead, sdhci_pltfm_unregister() will be removed.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 drivers/mmc/host/sdhci-pltfm.c | 10 ++++++++++
 drivers/mmc/host/sdhci-pltfm.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index 72d07b49b0a3..5a63c8818987 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -199,6 +199,16 @@ void sdhci_pltfm_unregister(struct platform_device *pdev)
 }
 EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
 
+void sdhci_pltfm_remove(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
+
+	sdhci_remove_host(host, dead);
+	sdhci_pltfm_free(pdev);
+}
+EXPORT_SYMBOL_GPL(sdhci_pltfm_remove);
+
 #ifdef CONFIG_PM_SLEEP
 int sdhci_pltfm_suspend(struct device *dev)
 {
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h
index 6e6a443dafd9..402f4edc6ca5 100644
--- a/drivers/mmc/host/sdhci-pltfm.h
+++ b/drivers/mmc/host/sdhci-pltfm.h
@@ -103,6 +103,7 @@ extern int sdhci_pltfm_register(struct platform_device *pdev,
 				const struct sdhci_pltfm_data *pdata,
 				size_t priv_size);
 extern void sdhci_pltfm_unregister(struct platform_device *pdev);
+extern void sdhci_pltfm_remove(struct platform_device *pdev);
 
 extern unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host);
 
-- 
2.34.1