| Message ID | 20220504213251.264819-10-sebastian.reichel@collabora.com |
|---|---|
| State | New |
| Headers | show |
| Series | Basic RK3588 Support | expand |
On Wed, 4 May 2022 at 23:33, Sebastian Reichel <sebastian.reichel@collabora.com> wrote: > > From: Yifeng Zhao <yifeng.zhao@rock-chips.com> > > The reset function build in the SDHCI will not reset the logic > circuit related to the tuning function, which may cause data > reading errors. Resetting the complete SDHCI controller through > the reset controller fixes the issue. > > Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com> > [rebase, use optional variant of reset getter] > Acked-by: Adrian Hunter <adrian.hunter@intel.com> > Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> I think this needs a corresponding update of the DT docs. Otherwise this looks good to me. Kind regards Uffe > --- > drivers/mmc/host/sdhci-of-dwcmshc.c | 26 +++++++++++++++++++++++++- > 1 file changed, 25 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c > index bac874ab0b33..3a1b5ba36405 100644 > --- a/drivers/mmc/host/sdhci-of-dwcmshc.c > +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c > @@ -15,6 +15,7 @@ > #include <linux/module.h> > #include <linux/of.h> > #include <linux/of_device.h> > +#include <linux/reset.h> > #include <linux/sizes.h> > > #include "sdhci-pltfm.h" > @@ -63,6 +64,7 @@ > struct rk3568_priv { > /* Rockchip specified optional clocks */ > struct clk_bulk_data rockchip_clks[RK3568_MAX_CLKS]; > + struct reset_control *reset; > u8 txclk_tapnum; > }; > > @@ -255,6 +257,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); > } > > +static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask) > +{ > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host); > + struct rk35xx_priv *priv = dwc_priv->priv; > + > + if (mask & SDHCI_RESET_ALL && priv->reset) { > + reset_control_assert(priv->reset); > + udelay(1); > + reset_control_deassert(priv->reset); > + } > + > + sdhci_reset(host, mask); > +} > + > static const struct sdhci_ops sdhci_dwcmshc_ops = { > .set_clock = sdhci_set_clock, > .set_bus_width = sdhci_set_bus_width, > @@ -269,7 +286,7 @@ static const struct sdhci_ops sdhci_dwcmshc_rk3568_ops = { > .set_bus_width = sdhci_set_bus_width, > .set_uhs_signaling = dwcmshc_set_uhs_signaling, > .get_max_clock = sdhci_pltfm_clk_get_max_clock, > - .reset = sdhci_reset, > + .reset = rk35xx_sdhci_reset, > .adma_write_desc = dwcmshc_adma_write_desc, > }; > > @@ -292,6 +309,13 @@ static int dwcmshc_rk3568_init(struct sdhci_host *host, struct dwcmshc_priv *dwc > int err; > struct rk3568_priv *priv = dwc_priv->priv; > > + priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc)); > + if (IS_ERR(priv->reset)) { > + err = PTR_ERR(priv->reset); > + dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n", err); > + return err; > + } > + > priv->rockchip_clks[0].id = "axi"; > priv->rockchip_clks[1].id = "block"; > priv->rockchip_clks[2].id = "timer"; > -- > 2.35.1 >
Hi, On Fri, May 06, 2022 at 10:52:42AM +0200, Ulf Hansson wrote: > On Wed, 4 May 2022 at 23:33, Sebastian Reichel > <sebastian.reichel@collabora.com> wrote: > > > > From: Yifeng Zhao <yifeng.zhao@rock-chips.com> > > > > The reset function build in the SDHCI will not reset the logic > > circuit related to the tuning function, which may cause data > > reading errors. Resetting the complete SDHCI controller through > > the reset controller fixes the issue. > > > > Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com> > > [rebase, use optional variant of reset getter] > > Acked-by: Adrian Hunter <adrian.hunter@intel.com> > > Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> > > I think this needs a corresponding update of the DT docs. Otherwise > this looks good to me. I do have 'resets' and 'reset-names' properties in the rk3588s.dtsi for the sdhci interface and 'make dtbs_check' did not complain about anything but missing 'arm,sdei-1.0' compatible for the rk3588 EVB (sdei binding has not yet been converted to yaml). Thus I assume the resets property is inferred from somewhere? -- Sebastian > > Kind regards > Uffe > > > --- > > drivers/mmc/host/sdhci-of-dwcmshc.c | 26 +++++++++++++++++++++++++- > > 1 file changed, 25 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c > > index bac874ab0b33..3a1b5ba36405 100644 > > --- a/drivers/mmc/host/sdhci-of-dwcmshc.c > > +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c > > @@ -15,6 +15,7 @@ > > #include <linux/module.h> > > #include <linux/of.h> > > #include <linux/of_device.h> > > +#include <linux/reset.h> > > #include <linux/sizes.h> > > > > #include "sdhci-pltfm.h" > > @@ -63,6 +64,7 @@ > > struct rk3568_priv { > > /* Rockchip specified optional clocks */ > > struct clk_bulk_data rockchip_clks[RK3568_MAX_CLKS]; > > + struct reset_control *reset; > > u8 txclk_tapnum; > > }; > > > > @@ -255,6 +257,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > > sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); > > } > > > > +static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask) > > +{ > > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > > + struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host); > > + struct rk35xx_priv *priv = dwc_priv->priv; > > + > > + if (mask & SDHCI_RESET_ALL && priv->reset) { > > + reset_control_assert(priv->reset); > > + udelay(1); > > + reset_control_deassert(priv->reset); > > + } > > + > > + sdhci_reset(host, mask); > > +} > > + > > static const struct sdhci_ops sdhci_dwcmshc_ops = { > > .set_clock = sdhci_set_clock, > > .set_bus_width = sdhci_set_bus_width, > > @@ -269,7 +286,7 @@ static const struct sdhci_ops sdhci_dwcmshc_rk3568_ops = { > > .set_bus_width = sdhci_set_bus_width, > > .set_uhs_signaling = dwcmshc_set_uhs_signaling, > > .get_max_clock = sdhci_pltfm_clk_get_max_clock, > > - .reset = sdhci_reset, > > + .reset = rk35xx_sdhci_reset, > > .adma_write_desc = dwcmshc_adma_write_desc, > > }; > > > > @@ -292,6 +309,13 @@ static int dwcmshc_rk3568_init(struct sdhci_host *host, struct dwcmshc_priv *dwc > > int err; > > struct rk3568_priv *priv = dwc_priv->priv; > > > > + priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc)); > > + if (IS_ERR(priv->reset)) { > > + err = PTR_ERR(priv->reset); > > + dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n", err); > > + return err; > > + } > > + > > priv->rockchip_clks[0].id = "axi"; > > priv->rockchip_clks[1].id = "block"; > > priv->rockchip_clks[2].id = "timer"; > > -- > > 2.35.1 > >
On Fri, 6 May 2022 at 11:18, Sebastian Reichel <sebastian.reichel@collabora.com> wrote: > > Hi, > > On Fri, May 06, 2022 at 10:52:42AM +0200, Ulf Hansson wrote: > > On Wed, 4 May 2022 at 23:33, Sebastian Reichel > > <sebastian.reichel@collabora.com> wrote: > > > > > > From: Yifeng Zhao <yifeng.zhao@rock-chips.com> > > > > > > The reset function build in the SDHCI will not reset the logic > > > circuit related to the tuning function, which may cause data > > > reading errors. Resetting the complete SDHCI controller through > > > the reset controller fixes the issue. > > > > > > Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com> > > > [rebase, use optional variant of reset getter] > > > Acked-by: Adrian Hunter <adrian.hunter@intel.com> > > > Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> > > > > I think this needs a corresponding update of the DT docs. Otherwise > > this looks good to me. > > I do have 'resets' and 'reset-names' properties in the rk3588s.dtsi > for the sdhci interface and 'make dtbs_check' did not complain about > anything but missing 'arm,sdei-1.0' compatible for the rk3588 EVB > (sdei binding has not yet been converted to yaml). Thus I assume the > resets property is inferred from somewhere? I don't think it should, but I may be wrong. How about if you extend the example in the DT doc with a reset property, will that cause the DT tools to complain? Kind regards Uffe > > -- Sebastian > > > > > Kind regards > > Uffe > > > > > --- > > > drivers/mmc/host/sdhci-of-dwcmshc.c | 26 +++++++++++++++++++++++++- > > > 1 file changed, 25 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c > > > index bac874ab0b33..3a1b5ba36405 100644 > > > --- a/drivers/mmc/host/sdhci-of-dwcmshc.c > > > +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c > > > @@ -15,6 +15,7 @@ > > > #include <linux/module.h> > > > #include <linux/of.h> > > > #include <linux/of_device.h> > > > +#include <linux/reset.h> > > > #include <linux/sizes.h> > > > > > > #include "sdhci-pltfm.h" > > > @@ -63,6 +64,7 @@ > > > struct rk3568_priv { > > > /* Rockchip specified optional clocks */ > > > struct clk_bulk_data rockchip_clks[RK3568_MAX_CLKS]; > > > + struct reset_control *reset; > > > u8 txclk_tapnum; > > > }; > > > > > > @@ -255,6 +257,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > > > sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); > > > } > > > > > > +static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask) > > > +{ > > > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > > > + struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host); > > > + struct rk35xx_priv *priv = dwc_priv->priv; > > > + > > > + if (mask & SDHCI_RESET_ALL && priv->reset) { > > > + reset_control_assert(priv->reset); > > > + udelay(1); > > > + reset_control_deassert(priv->reset); > > > + } > > > + > > > + sdhci_reset(host, mask); > > > +} > > > + > > > static const struct sdhci_ops sdhci_dwcmshc_ops = { > > > .set_clock = sdhci_set_clock, > > > .set_bus_width = sdhci_set_bus_width, > > > @@ -269,7 +286,7 @@ static const struct sdhci_ops sdhci_dwcmshc_rk3568_ops = { > > > .set_bus_width = sdhci_set_bus_width, > > > .set_uhs_signaling = dwcmshc_set_uhs_signaling, > > > .get_max_clock = sdhci_pltfm_clk_get_max_clock, > > > - .reset = sdhci_reset, > > > + .reset = rk35xx_sdhci_reset, > > > .adma_write_desc = dwcmshc_adma_write_desc, > > > }; > > > > > > @@ -292,6 +309,13 @@ static int dwcmshc_rk3568_init(struct sdhci_host *host, struct dwcmshc_priv *dwc > > > int err; > > > struct rk3568_priv *priv = dwc_priv->priv; > > > > > > + priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc)); > > > + if (IS_ERR(priv->reset)) { > > > + err = PTR_ERR(priv->reset); > > > + dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n", err); > > > + return err; > > > + } > > > + > > > priv->rockchip_clks[0].id = "axi"; > > > priv->rockchip_clks[1].id = "block"; > > > priv->rockchip_clks[2].id = "timer"; > > > -- > > > 2.35.1 > > >
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index bac874ab0b33..3a1b5ba36405 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/reset.h> #include <linux/sizes.h> #include "sdhci-pltfm.h" @@ -63,6 +64,7 @@ struct rk3568_priv { /* Rockchip specified optional clocks */ struct clk_bulk_data rockchip_clks[RK3568_MAX_CLKS]; + struct reset_control *reset; u8 txclk_tapnum; }; @@ -255,6 +257,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); } +static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host); + struct rk35xx_priv *priv = dwc_priv->priv; + + if (mask & SDHCI_RESET_ALL && priv->reset) { + reset_control_assert(priv->reset); + udelay(1); + reset_control_deassert(priv->reset); + } + + sdhci_reset(host, mask); +} + static const struct sdhci_ops sdhci_dwcmshc_ops = { .set_clock = sdhci_set_clock, .set_bus_width = sdhci_set_bus_width, @@ -269,7 +286,7 @@ static const struct sdhci_ops sdhci_dwcmshc_rk3568_ops = { .set_bus_width = sdhci_set_bus_width, .set_uhs_signaling = dwcmshc_set_uhs_signaling, .get_max_clock = sdhci_pltfm_clk_get_max_clock, - .reset = sdhci_reset, + .reset = rk35xx_sdhci_reset, .adma_write_desc = dwcmshc_adma_write_desc, }; @@ -292,6 +309,13 @@ static int dwcmshc_rk3568_init(struct sdhci_host *host, struct dwcmshc_priv *dwc int err; struct rk3568_priv *priv = dwc_priv->priv; + priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc)); + if (IS_ERR(priv->reset)) { + err = PTR_ERR(priv->reset); + dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n", err); + return err; + } + priv->rockchip_clks[0].id = "axi"; priv->rockchip_clks[1].id = "block"; priv->rockchip_clks[2].id = "timer";