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mmc: sdhci-pxav3: add state_uhs pinctrl setting

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Different bus clocks require different pinctrl states to remain stable.
Add support for selecting between a default and UHS state according to
the bus clock.

Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Duje Mihanović <duje@dujemihanovic.xyz>
Link: https://lore.kernel.org/r/20250821-pxav3-uhs-v4-2-bb588314f3c3@dujemihanovic.xyz
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Duje Mihanović 2025-08-21 13:20:36 +02:00 committed by Ulf Hansson
parent 5a22df198b
commit 9674f9e325
1 changed files with 40 additions and 1 deletions
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41
drivers/mmc/host/sdhci-pxav3.c
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@ -20,9 +20,11 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/mbus.h>
#include <linux/units.h>
#include "sdhci.h"
#include "sdhci-pltfm.h"
@ -51,6 +53,9 @@ struct sdhci_pxa {
struct clk *clk_io;
u8 power_mode;
void __iomem *sdio3_conf_reg;
struct pinctrl *pinctrl;
struct pinctrl_state *pins_default;
struct pinctrl_state *pins_uhs;
};
/*
@ -313,8 +318,20 @@ static void pxav3_set_power(struct sdhci_host *host, unsigned char mode,
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
}
static void pxav3_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *phost = sdhci_priv(host);
struct sdhci_pxa *pxa = sdhci_pltfm_priv(phost);
struct pinctrl_state *pins = clock < 100 * HZ_PER_MHZ ? pxa->pins_default : pxa->pins_uhs;
if (pins)
pinctrl_select_state(pxa->pinctrl, pins);
sdhci_set_clock(host, clock);
}
static const struct sdhci_ops pxav3_sdhci_ops = {
.set_clock = sdhci_set_clock,
.set_clock = pxav3_set_clock,
.set_power = pxav3_set_power,
.platform_send_init_74_clocks = pxav3_gen_init_74_clocks,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
@ -366,6 +383,19 @@ static inline struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
}
#endif
static struct pinctrl_state *pxav3_lookup_pinstate(struct device *dev, struct pinctrl *pinctrl,
const char *name)
{
struct pinctrl_state *pins = pinctrl_lookup_state(pinctrl, name);
if (IS_ERR(pins)) {
dev_dbg(dev, "could not get pinstate '%s': %ld\n", name, PTR_ERR(pins));
return NULL;
}
return pins;
}
static int sdhci_pxav3_probe(struct platform_device *pdev)
{
struct sdhci_pltfm_host *pltfm_host;
@ -440,6 +470,15 @@ static int sdhci_pxav3_probe(struct platform_device *pdev)
host->mmc->pm_caps |= pdata->pm_caps;
}
pxa->pinctrl = devm_pinctrl_get(dev);
if (!IS_ERR(pxa->pinctrl)) {
pxa->pins_default = pxav3_lookup_pinstate(dev, pxa->pinctrl, "default");
if (pxa->pins_default)
pxa->pins_uhs = pxav3_lookup_pinstate(dev, pxa->pinctrl, "state_uhs");
} else {
dev_dbg(dev, "could not get pinctrl handle: %ld\n", PTR_ERR(pxa->pinctrl));
}
pm_runtime_get_noresume(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, PXAV3_RPM_DELAY_MS);