[PATCH v2 4/8] pinctrl: sunxi: support moved power configuration registers

Andre Przywara
2025-02-14T00:47:31Z

The Allwinner pincontroller IP features some registers to control the
withstand voltage of each pin group. So far those registers were always
located at the same offset, but the A523 SoC has moved them (probably to
accommodate all eleven pin banks).

Add a flag to note this feature, and use that to program the registers
either at offset 0x340 or 0x380. So far no pincontroller driver uses
this flag, but we need it for the upcoming A523 support.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
drivers/pinctrl/sunxi/pinctrl-sunxi.c | 15 +++++++++++----
drivers/pinctrl/sunxi/pinctrl-sunxi.h | 7 +++++--
2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 83a031ceb29f2..a1057122272bd 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -736,9 +736,9 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl,
val = uV > 1800000 && uV <= 2500000 ? BIT(bank) : 0;

raw_spin_lock_irqsave(&pctl->lock, flags);
- reg = readl(pctl->membase + PIO_POW_MOD_CTL_REG);
+ reg = readl(pctl->membase + pctl->pow_mod_sel_offset);
reg &= ~BIT(bank);
- writel(reg | val, pctl->membase + PIO_POW_MOD_CTL_REG);
+ writel(reg | val, pctl->membase + pctl->pow_mod_sel_offset);
raw_spin_unlock_irqrestore(&pctl->lock, flags);

fallthrough;
@@ -746,9 +746,12 @@ static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl,
val = uV <= 1800000 ? 1 : 0;

raw_spin_lock_irqsave(&pctl->lock, flags);
- reg = readl(pctl->membase + PIO_POW_MOD_SEL_REG);
+ reg = readl(pctl->membase + pctl->pow_mod_sel_offset +
+ PIO_POW_MOD_SEL_OFS);
reg &= ~(1 << bank);
- writel(reg | val << bank, pctl->membase + PIO_POW_MOD_SEL_REG);
+ writel(reg | val << bank,
+ pctl->membase + pctl->pow_mod_sel_offset +
+ PIO_POW_MOD_SEL_OFS);
raw_spin_unlock_irqrestore(&pctl->lock, flags);
return 0;
default:
@@ -1520,6 +1523,10 @@ int sunxi_pinctrl_init_with_flags(struct platform_device *pdev,
pctl->pull_regs_offset = PULL_REGS_OFFSET;
pctl->dlevel_field_width = DLEVEL_FIELD_WIDTH;
}
+ if (flags & SUNXI_PINCTRL_ELEVEN_BANKS)
+ pctl->pow_mod_sel_offset = PIO_11B_POW_MOD_SEL_REG;
+ else
+ pctl->pow_mod_sel_offset = PIO_POW_MOD_SEL_REG;

pctl->irq_array = devm_kcalloc(&pdev->dev,
IRQ_PER_BANK * pctl->desc->irq_banks,
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h
index 6cf721876d89d..a93385e456a57 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.h
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h
@@ -87,9 +87,11 @@
#define SUNXI_PINCTRL_VARIANT_MASK GENMASK(7, 0)
#define SUNXI_PINCTRL_NEW_REG_LAYOUT BIT(8)
#define SUNXI_PINCTRL_PORTF_SWITCH BIT(9)
+#define SUNXI_PINCTRL_ELEVEN_BANKS BIT(10)

-#define PIO_POW_MOD_SEL_REG 0x340
-#define PIO_POW_MOD_CTL_REG 0x344
+#define PIO_POW_MOD_SEL_REG 0x340
+#define PIO_11B_POW_MOD_SEL_REG 0x380
+#define PIO_POW_MOD_SEL_OFS 0x004

#define PIO_BANK_K_OFFSET 0x500

@@ -173,6 +175,7 @@ struct sunxi_pinctrl {
u32 bank_mem_size;
u32 pull_regs_offset;
u32 dlevel_field_width;
+ u32 pow_mod_sel_offset;
};

#define SUNXI_PIN(_pin, ...) \
--
2.46.3