| Message ID | 20190405234514.6183-11-megous@megous.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for Orange Pi 3 | expand |
On Sat, Apr 06, 2019 at 01:45:12AM +0200, verejna wrote: > From: Ondrej Jirman <megous@megous.com> > > H6 SoC has a "pio group withstand voltage mode" register (datasheet > description), that needs to be used to select either 1.8V or 3.3V > I/O mode, based on what voltage is powering the respective pin > banks and is thus used for I/O signals. > > Add support for configuring this register according to the voltage > of the pin bank regulator (if enabled). > > This is similar to the support for I/O bias voltage setting patch > for A80 and the same concerns apply. (see commit 402bfb3c135213dc > Support I/O bias voltage setting on A80). > > Signed-off-by: Ondrej Jirman <megous@megous.com> > --- > drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c | 1 + > drivers/pinctrl/sunxi/pinctrl-sunxi.c | 14 ++++++++++++++ > drivers/pinctrl/sunxi/pinctrl-sunxi.h | 3 +++ > 3 files changed, 18 insertions(+) > > diff --git a/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c b/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c > index ef4268cc6227..30b1befa8ed8 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c > +++ b/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c > @@ -591,6 +591,7 @@ static const struct sunxi_pinctrl_desc h6_pinctrl_data = { > .irq_banks = 4, > .irq_bank_map = h6_irq_bank_map, > .irq_read_needs_mux = true, > + .io_bias_cfg_variant = IO_BIAS_CFG_V2, > }; > > static int h6_pinctrl_probe(struct platform_device *pdev) > diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c > index 9f329fec77cf..59a4ed396d92 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c > +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c > @@ -607,6 +607,8 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, > unsigned pin, > struct regulator *supply) > { > + unsigned short bank = pin / PINS_PER_BANK; > + unsigned long flags; > u32 val, reg; > int uV; > > @@ -639,6 +641,18 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, > reg = readl(pctl->membase + sunxi_grp_config_reg(pin)); > reg &= ~IO_BIAS_MASK; > writel(reg | val, pctl->membase + sunxi_grp_config_reg(pin)); > + } else if (pctl->desc->io_bias_cfg_variant == IO_BIAS_CFG_V2) { > + val = uV <= 1800000 ? 1 : 0; > + > + dev_info(pctl->dev, > + "Setting voltage bias to %sV on bank P%c\n", > + val ? "1.8" : "3.3", 'A' + bank); I'll drop this logging in v2. I forgot it here, after testing the patch. o. > + raw_spin_lock_irqsave(&pctl->lock, flags); > + reg = readl(pctl->membase + PIO_POW_MOD_SEL_REG); > + reg &= ~(1 << bank); > + writel(reg | val << bank, pctl->membase + PIO_POW_MOD_SEL_REG); > + raw_spin_unlock_irqrestore(&pctl->lock, flags); > } > > return 0; > diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h > index 476772f91dba..3a66376f141b 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.h > +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h > @@ -95,7 +95,10 @@ > #define PINCTRL_SUN7I_A20 BIT(7) > #define PINCTRL_SUN8I_R40 BIT(8) > > +#define PIO_POW_MOD_SEL_REG 0x340 > + > #define IO_BIAS_CFG_V1 1 > +#define IO_BIAS_CFG_V2 2 > > struct sunxi_desc_function { > unsigned long variant; > -- > 2.21.0 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
On Sat, Apr 06, 2019 at 01:45:12AM +0200, megous@megous.com wrote: > From: Ondrej Jirman <megous@megous.com> > > H6 SoC has a "pio group withstand voltage mode" register (datasheet > description), that needs to be used to select either 1.8V or 3.3V > I/O mode, based on what voltage is powering the respective pin > banks and is thus used for I/O signals. > > Add support for configuring this register according to the voltage > of the pin bank regulator (if enabled). > > This is similar to the support for I/O bias voltage setting patch > for A80 and the same concerns apply. (see commit 402bfb3c135213dc > Support I/O bias voltage setting on A80). > > Signed-off-by: Ondrej Jirman <megous@megous.com> > --- > drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c | 1 + > drivers/pinctrl/sunxi/pinctrl-sunxi.c | 14 ++++++++++++++ > drivers/pinctrl/sunxi/pinctrl-sunxi.h | 3 +++ > 3 files changed, 18 insertions(+) > > diff --git a/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c b/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c > index ef4268cc6227..30b1befa8ed8 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c > +++ b/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c > @@ -591,6 +591,7 @@ static const struct sunxi_pinctrl_desc h6_pinctrl_data = { > .irq_banks = 4, > .irq_bank_map = h6_irq_bank_map, > .irq_read_needs_mux = true, > + .io_bias_cfg_variant = IO_BIAS_CFG_V2, > }; > > static int h6_pinctrl_probe(struct platform_device *pdev) > diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c > index 9f329fec77cf..59a4ed396d92 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c > +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c > @@ -607,6 +607,8 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, > unsigned pin, > struct regulator *supply) > { > + unsigned short bank = pin / PINS_PER_BANK; > + unsigned long flags; > u32 val, reg; > int uV; > > @@ -639,6 +641,18 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, > reg = readl(pctl->membase + sunxi_grp_config_reg(pin)); > reg &= ~IO_BIAS_MASK; > writel(reg | val, pctl->membase + sunxi_grp_config_reg(pin)); > + } else if (pctl->desc->io_bias_cfg_variant == IO_BIAS_CFG_V2) { > + val = uV <= 1800000 ? 1 : 0; > + > + dev_info(pctl->dev, > + "Setting voltage bias to %sV on bank P%c\n", > + val ? "1.8" : "3.3", 'A' + bank); > + > + raw_spin_lock_irqsave(&pctl->lock, flags); > + reg = readl(pctl->membase + PIO_POW_MOD_SEL_REG); > + reg &= ~(1 << bank); > + writel(reg | val << bank, pctl->membase + PIO_POW_MOD_SEL_REG); > + raw_spin_unlock_irqrestore(&pctl->lock, flags); > } > > return 0; > diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h > index 476772f91dba..3a66376f141b 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.h > +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h > @@ -95,7 +95,10 @@ > #define PINCTRL_SUN7I_A20 BIT(7) > #define PINCTRL_SUN8I_R40 BIT(8) > > +#define PIO_POW_MOD_SEL_REG 0x340 > + > #define IO_BIAS_CFG_V1 1 > +#define IO_BIAS_CFG_V2 2 Can you document what V1 and V2 means exactly? Thanks! Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
diff --git a/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c b/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c index ef4268cc6227..30b1befa8ed8 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c +++ b/drivers/pinctrl/sunxi/pinctrl-sun50i-h6.c @@ -591,6 +591,7 @@ static const struct sunxi_pinctrl_desc h6_pinctrl_data = { .irq_banks = 4, .irq_bank_map = h6_irq_bank_map, .irq_read_needs_mux = true, + .io_bias_cfg_variant = IO_BIAS_CFG_V2, }; static int h6_pinctrl_probe(struct platform_device *pdev) diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c index 9f329fec77cf..59a4ed396d92 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c @@ -607,6 +607,8 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, unsigned pin, struct regulator *supply) { + unsigned short bank = pin / PINS_PER_BANK; + unsigned long flags; u32 val, reg; int uV; @@ -639,6 +641,18 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, reg = readl(pctl->membase + sunxi_grp_config_reg(pin)); reg &= ~IO_BIAS_MASK; writel(reg | val, pctl->membase + sunxi_grp_config_reg(pin)); + } else if (pctl->desc->io_bias_cfg_variant == IO_BIAS_CFG_V2) { + val = uV <= 1800000 ? 1 : 0; + + dev_info(pctl->dev, + "Setting voltage bias to %sV on bank P%c\n", + val ? "1.8" : "3.3", 'A' + bank); + + raw_spin_lock_irqsave(&pctl->lock, flags); + reg = readl(pctl->membase + PIO_POW_MOD_SEL_REG); + reg &= ~(1 << bank); + writel(reg | val << bank, pctl->membase + PIO_POW_MOD_SEL_REG); + raw_spin_unlock_irqrestore(&pctl->lock, flags); } return 0; diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h index 476772f91dba..3a66376f141b 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.h +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h @@ -95,7 +95,10 @@ #define PINCTRL_SUN7I_A20 BIT(7) #define PINCTRL_SUN8I_R40 BIT(8) +#define PIO_POW_MOD_SEL_REG 0x340 + #define IO_BIAS_CFG_V1 1 +#define IO_BIAS_CFG_V2 2 struct sunxi_desc_function { unsigned long variant;