Hi Ben, (CC'ing Linus Walleij)
Thank you for the patch. On Wednesday 10 June 2015 00:23:31 Ben Hutchings wrote: > All the SHDIs can operate with either 3.3V or 1.8V signals, depending > on negotiation with the card. > > Add separate functions for the 1.8V mode, and implement the set_mux > operation on all SDHI functions to configure the voltage for each > group of pins. I don't think duplicating all functions for 1.8V and 3.3V is the right way to go. Can't we use the pinconf API instead, and in particular the PIN_CONFIG_POWER_SOURCE configuration ? > Signed-off-by: Ben Hutchings <[email protected]> > --- > drivers/pinctrl/sh-pfc/core.c | 2 +- > drivers/pinctrl/sh-pfc/core.h | 1 + > drivers/pinctrl/sh-pfc/pfc-r8a7790.c | 70 ++++++++++++++++++++++++++++++--- > 3 files changed, 68 insertions(+), 5 deletions(-) > > diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c > index 7b2c9495c383..7d51f96afc9a 100644 > --- a/drivers/pinctrl/sh-pfc/core.c > +++ b/drivers/pinctrl/sh-pfc/core.c > @@ -92,7 +92,7 @@ static int sh_pfc_map_resources(struct sh_pfc *pfc, > return 0; > } > > -static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg) > +void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg) > { > struct sh_pfc_window *window; > phys_addr_t address = reg; > diff --git a/drivers/pinctrl/sh-pfc/core.h b/drivers/pinctrl/sh-pfc/core.h > index 6dc8a6fc2746..af355629c5d2 100644 > --- a/drivers/pinctrl/sh-pfc/core.h > +++ b/drivers/pinctrl/sh-pfc/core.h > @@ -57,6 +57,7 @@ int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc); > int sh_pfc_register_pinctrl(struct sh_pfc *pfc); > int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc); > > +void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 address); > u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int reg_width); > void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width, > u32 data); > diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c > b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c index 22a5470889f5..baba3151687f > 100644 > --- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c > +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c > @@ -4472,6 +4472,8 @@ static const char * const sdhi0_groups[] = { > "sdhi0_wp", > }; > > +#define sdhi0_1v8_groups sdhi0_groups > + > static const char * const sdhi1_groups[] = { > "sdhi1_data1", > "sdhi1_data4", > @@ -4480,6 +4482,8 @@ static const char * const sdhi1_groups[] = { > "sdhi1_wp", > }; > > +#define sdhi1_1v8_groups sdhi1_groups > + > static const char * const sdhi2_groups[] = { > "sdhi2_data1", > "sdhi2_data4", > @@ -4488,6 +4492,8 @@ static const char * const sdhi2_groups[] = { > "sdhi2_wp", > }; > > +#define sdhi2_1v8_groups sdhi2_groups > + > static const char * const sdhi3_groups[] = { > "sdhi3_data1", > "sdhi3_data4", > @@ -4496,6 +4502,8 @@ static const char * const sdhi3_groups[] = { > "sdhi3_wp", > }; > > +#define sdhi3_1v8_groups sdhi3_groups > + > static const char * const ssi_groups[] = { > "ssi0_data", > "ssi0129_ctrl", > @@ -4595,6 +4603,56 @@ static const char * const vin3_groups[] = { > "vin3_clk", > }; > > +static void sdhi_set_voltage(struct sh_pfc *pfc, > + const struct sh_pfc_function *func, > + const struct sh_pfc_pin_group *grp) > +{ > + void __iomem *mapped_reg; > + u32 data, mask; > + int index; > + > + if (WARN_ON(strncmp(func->name, "sdhi", 4))) > + return; > + if (WARN_ON(strncmp(func->name, grp->name, 5))) > + return; > + > + /* Calculate mask in IOCTRL6 based on the group */ > + index = func->name[4] - '0'; > + if (WARN_ON(index < 0 || index > 3)) > + return; > + if (!strcmp(grp->name + 5, "_data1")) > + mask = 0x20; > + else if (!strcmp(grp->name + 5, "_data4")) > + mask = 0x3c; > + else if (!strcmp(grp->name + 5, "_ctrl")) > + mask = 0xc0; > + else if (!strcmp(grp->name + 5, "_cd")) > + mask = 0x02; > + else if (!strcmp(grp->name + 5, "_wp")) > + mask = 0x01; > + else { > + WARN_ON(1); > + return; > + } > + mask <<= 8 * (3 - index); > + > + /* Map IOCTRL6 */ > + mapped_reg = sh_pfc_phys_to_virt(pfc, 0xe606008c); > + > + data = sh_pfc_read_raw_reg(mapped_reg, 32); > + > + /* Set for 3.3V (high) or 1.8V (low) depending on the function name */ > + if (strcmp(func->name + 5, "_1v8")) > + data |= mask; > + else > + data &= ~mask; > + > + sh_pfc_write_raw_reg( > + sh_pfc_phys_to_virt(pfc, pfc->info->unlock_reg), 32, > + ~data); > + sh_pfc_write_raw_reg(mapped_reg, 32, data); > +} > + > static const struct sh_pfc_function pinmux_functions[] = { > SH_PFC_FUNCTION(audio_clk), > SH_PFC_FUNCTION(avb), > @@ -4631,10 +4689,14 @@ static const struct sh_pfc_function > pinmux_functions[] = { SH_PFC_FUNCTION(scifb0), > SH_PFC_FUNCTION(scifb1), > SH_PFC_FUNCTION(scifb2), > - SH_PFC_FUNCTION(sdhi0), > - SH_PFC_FUNCTION(sdhi1), > - SH_PFC_FUNCTION(sdhi2), > - SH_PFC_FUNCTION(sdhi3), > + SH_PFC_FUNCTION_SPECIAL(sdhi0, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi0_1v8, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi1, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi1_1v8, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi2, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi2_1v8, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi3, sdhi_set_voltage), > + SH_PFC_FUNCTION_SPECIAL(sdhi3_1v8, sdhi_set_voltage), > SH_PFC_FUNCTION(ssi), > SH_PFC_FUNCTION(tpu0), > SH_PFC_FUNCTION(usb0), -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
