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pinctrl: renesas: rzg2l: Add support to get/set drive-strength and ou…
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…tput-impedance-ohms

RZ/G2L supports two groups of pins Group-A and Group-B. For Group-A
pins drive-strength can be configured and for Group-B output-impedance
can be configured.

This patch splits PIN_CFG_IOLH macro to PIN_CFG_IOLH_A/B and adds
support to get/set drive-strength and output-impedance-ohms for the
supported pins.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20211110224622.16022-7-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Lad Prabhakar authored and Geert Uytterhoeven committed Nov 15, 2021
1 parent 22972a2 commit adb613f
Showing 1 changed file with 113 additions and 48 deletions.
161 changes: 113 additions & 48 deletions drivers/pinctrl/renesas/pinctrl-rzg2l.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -35,20 +35,21 @@
#define MUX_FUNC(pinconf) (((pinconf) & MUX_FUNC_MASK) >> MUX_FUNC_OFFS)

/* PIN capabilities */
#define PIN_CFG_IOLH BIT(0)
#define PIN_CFG_SR BIT(1)
#define PIN_CFG_IEN BIT(2)
#define PIN_CFG_PUPD BIT(3)
#define PIN_CFG_IO_VMC_SD0 BIT(4)
#define PIN_CFG_IO_VMC_SD1 BIT(5)
#define PIN_CFG_IO_VMC_QSPI BIT(6)
#define PIN_CFG_IO_VMC_ETH0 BIT(7)
#define PIN_CFG_IO_VMC_ETH1 BIT(8)
#define PIN_CFG_FILONOFF BIT(9)
#define PIN_CFG_FILNUM BIT(10)
#define PIN_CFG_FILCLKSEL BIT(11)

#define RZG2L_MPXED_PIN_FUNCS (PIN_CFG_IOLH | \
#define PIN_CFG_IOLH_A BIT(0)
#define PIN_CFG_IOLH_B BIT(1)
#define PIN_CFG_SR BIT(2)
#define PIN_CFG_IEN BIT(3)
#define PIN_CFG_PUPD BIT(4)
#define PIN_CFG_IO_VMC_SD0 BIT(5)
#define PIN_CFG_IO_VMC_SD1 BIT(6)
#define PIN_CFG_IO_VMC_QSPI BIT(7)
#define PIN_CFG_IO_VMC_ETH0 BIT(8)
#define PIN_CFG_IO_VMC_ETH1 BIT(9)
#define PIN_CFG_FILONOFF BIT(10)
#define PIN_CFG_FILNUM BIT(11)
#define PIN_CFG_FILCLKSEL BIT(12)

#define RZG2L_MPXED_PIN_FUNCS (PIN_CFG_IOLH_A | \
PIN_CFG_SR | \
PIN_CFG_PUPD | \
PIN_CFG_FILONOFF | \
Expand Down Expand Up @@ -86,6 +87,7 @@
#define PMC(n) (0x0200 + 0x10 + (n))
#define PFC(n) (0x0400 + 0x40 + (n) * 4)
#define PIN(n) (0x0800 + 0x10 + (n))
#define IOLH(n) (0x1000 + (n) * 8)
#define IEN(n) (0x1800 + (n) * 8)
#define PWPR (0x3014)
#define SD_CH(n) (0x3000 + (n) * 4)
Expand All @@ -101,6 +103,7 @@
#define PVDD_MASK 0x01
#define PFC_MASK 0x07
#define IEN_MASK 0x01
#define IOLH_MASK 0x03

#define PM_INPUT 0x1
#define PM_OUTPUT 0x2
Expand Down Expand Up @@ -138,6 +141,9 @@ struct rzg2l_pinctrl {
spinlock_t lock;
};

static const unsigned int iolh_groupa_mA[] = { 2, 4, 8, 12 };
static const unsigned int iolh_groupb_oi[] = { 100, 66, 50, 33 };

static void rzg2l_pinctrl_set_pfc_mode(struct rzg2l_pinctrl *pctrl,
u8 port, u8 pin, u8 func)
{
Expand Down Expand Up @@ -532,6 +538,28 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
break;
}

case PIN_CONFIG_DRIVE_STRENGTH: {
unsigned int index;

if (!(cfg & PIN_CFG_IOLH_A))
return -EINVAL;

index = rzg2l_read_pin_config(pctrl, IOLH(port_offset), bit, IOLH_MASK);
arg = iolh_groupa_mA[index];
break;
}

case PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS: {
unsigned int index;

if (!(cfg & PIN_CFG_IOLH_B))
return -EINVAL;

index = rzg2l_read_pin_config(pctrl, IOLH(port_offset), bit, IOLH_MASK);
arg = iolh_groupb_oi[index];
break;
}

default:
return -ENOTSUPP;
}
Expand Down Expand Up @@ -609,6 +637,43 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
spin_unlock_irqrestore(&pctrl->lock, flags);
break;
}

case PIN_CONFIG_DRIVE_STRENGTH: {
unsigned int arg = pinconf_to_config_argument(_configs[i]);
unsigned int index;

if (!(cfg & PIN_CFG_IOLH_A))
return -EINVAL;

for (index = 0; index < ARRAY_SIZE(iolh_groupa_mA); index++) {
if (arg == iolh_groupa_mA[index])
break;
}
if (index >= ARRAY_SIZE(iolh_groupa_mA))
return -EINVAL;

rzg2l_rmw_pin_config(pctrl, IOLH(port_offset), bit, IOLH_MASK, index);
break;
}

case PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS: {
unsigned int arg = pinconf_to_config_argument(_configs[i]);
unsigned int index;

if (!(cfg & PIN_CFG_IOLH_B))
return -EINVAL;

for (index = 0; index < ARRAY_SIZE(iolh_groupb_oi); index++) {
if (arg == iolh_groupb_oi[index])
break;
}
if (index >= ARRAY_SIZE(iolh_groupb_oi))
return -EINVAL;

rzg2l_rmw_pin_config(pctrl, IOLH(port_offset), bit, IOLH_MASK, index);
break;
}

default:
return -EOPNOTSUPP;
}
Expand Down Expand Up @@ -935,75 +1000,75 @@ static struct rzg2l_dedicated_configs rzg2l_dedicated_pins[] = {
{ "NMI", RZG2L_SINGLE_PIN_PACK(0x1, 0,
(PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL)) },
{ "TMS/SWDIO", RZG2L_SINGLE_PIN_PACK(0x2, 0,
(PIN_CFG_SR | PIN_CFG_IOLH | PIN_CFG_IEN)) },
(PIN_CFG_SR | PIN_CFG_IOLH_A | PIN_CFG_IEN)) },
{ "TDO", RZG2L_SINGLE_PIN_PACK(0x3, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN)) },
(PIN_CFG_IOLH_A | PIN_CFG_SR | PIN_CFG_IEN)) },
{ "AUDIO_CLK1", RZG2L_SINGLE_PIN_PACK(0x4, 0, PIN_CFG_IEN) },
{ "AUDIO_CLK2", RZG2L_SINGLE_PIN_PACK(0x4, 1, PIN_CFG_IEN) },
{ "SD0_CLK", RZG2L_SINGLE_PIN_PACK(0x6, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_CMD", RZG2L_SINGLE_PIN_PACK(0x6, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_RST#", RZG2L_SINGLE_PIN_PACK(0x6, 2,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA0", RZG2L_SINGLE_PIN_PACK(0x7, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA1", RZG2L_SINGLE_PIN_PACK(0x7, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA2", RZG2L_SINGLE_PIN_PACK(0x7, 2,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA3", RZG2L_SINGLE_PIN_PACK(0x7, 3,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA4", RZG2L_SINGLE_PIN_PACK(0x7, 4,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA5", RZG2L_SINGLE_PIN_PACK(0x7, 5,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA6", RZG2L_SINGLE_PIN_PACK(0x7, 6,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD0_DATA7", RZG2L_SINGLE_PIN_PACK(0x7, 7,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD0)) },
{ "SD1_CLK", RZG2L_SINGLE_PIN_PACK(0x8, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_SD1))},
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_SD1)) },
{ "SD1_CMD", RZG2L_SINGLE_PIN_PACK(0x8, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
{ "SD1_DATA0", RZG2L_SINGLE_PIN_PACK(0x9, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
{ "SD1_DATA1", RZG2L_SINGLE_PIN_PACK(0x9, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
{ "SD1_DATA2", RZG2L_SINGLE_PIN_PACK(0x9, 2,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
{ "SD1_DATA3", RZG2L_SINGLE_PIN_PACK(0x9, 3,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IEN | PIN_CFG_IO_VMC_SD1)) },
{ "QSPI0_SPCLK", RZG2L_SINGLE_PIN_PACK(0xa, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI0_IO0", RZG2L_SINGLE_PIN_PACK(0xa, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI0_IO1", RZG2L_SINGLE_PIN_PACK(0xa, 2,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI0_IO2", RZG2L_SINGLE_PIN_PACK(0xa, 3,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI0_IO3", RZG2L_SINGLE_PIN_PACK(0xa, 4,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI0_SSL", RZG2L_SINGLE_PIN_PACK(0xa, 5,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI1_SPCLK", RZG2L_SINGLE_PIN_PACK(0xb, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI1_IO0", RZG2L_SINGLE_PIN_PACK(0xb, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI1_IO1", RZG2L_SINGLE_PIN_PACK(0xb, 2,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI1_IO2", RZG2L_SINGLE_PIN_PACK(0xb, 3,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI1_IO3", RZG2L_SINGLE_PIN_PACK(0xb, 4,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI1_SSL", RZG2L_SINGLE_PIN_PACK(0xb, 5,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI_RESET#", RZG2L_SINGLE_PIN_PACK(0xc, 0,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI_WP#", RZG2L_SINGLE_PIN_PACK(0xc, 1,
(PIN_CFG_IOLH | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
(PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "QSPI_INT#", RZG2L_SINGLE_PIN_PACK(0xc, 2, (PIN_CFG_SR | PIN_CFG_IO_VMC_QSPI)) },
{ "WDTOVF_PERROUT#", RZG2L_SINGLE_PIN_PACK(0xd, 0, (PIN_CFG_IOLH | PIN_CFG_SR)) },
{ "WDTOVF_PERROUT#", RZG2L_SINGLE_PIN_PACK(0xd, 0, (PIN_CFG_IOLH_A | PIN_CFG_SR)) },
{ "RIIC0_SDA", RZG2L_SINGLE_PIN_PACK(0xe, 0, PIN_CFG_IEN) },
{ "RIIC0_SCL", RZG2L_SINGLE_PIN_PACK(0xe, 1, PIN_CFG_IEN) },
{ "RIIC1_SDA", RZG2L_SINGLE_PIN_PACK(0xe, 2, PIN_CFG_IEN) },
Expand Down

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