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| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2019-02-07 12:24:46 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-02-08 15:04:41 +0300 |
| commit | b67328e1cf9735d2491ef9402fb7439db1d6e2ae (patch) | |
| tree | 8a8adb44cd54613dc86a6a96b6ca52af70cdeae2 /drivers/pinctrl/pinctrl-at91.c | |
| parent | 85e4e6881dbaae42bbac935c346753bea412ab76 (diff) | |
| download | linux-b67328e1cf9735d2491ef9402fb7439db1d6e2ae.tar.xz | |
pinctrl: at91: add option to use drive strength bits
SAM9X60 uses high and low drive strengths. To implement this, in
at91_pinctrl_mux_ops::set_drivestrength and
at91_pinctrl_mux_ops::get_drivestrength we need bit numbers of
drive strengths (1 for low, 2 for high), thus change the code to
allow the usage of drive strength bit numbers.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-at91.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 3d49bbbcdbc7..e907093b5b13 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -72,10 +72,15 @@ static int gpio_banks; * DRIVE_STRENGTH_DEFAULT is just a placeholder to avoid changing the drive * strength when there is no dt config for it. */ -#define DRIVE_STRENGTH_DEFAULT (0 << DRIVE_STRENGTH_SHIFT) -#define DRIVE_STRENGTH_LOW (1 << DRIVE_STRENGTH_SHIFT) -#define DRIVE_STRENGTH_MED (2 << DRIVE_STRENGTH_SHIFT) -#define DRIVE_STRENGTH_HI (3 << DRIVE_STRENGTH_SHIFT) +enum drive_strength_bit { + DRIVE_STRENGTH_BIT_DEF, + DRIVE_STRENGTH_BIT_LOW, + DRIVE_STRENGTH_BIT_MED, + DRIVE_STRENGTH_BIT_HI, +}; + +#define DRIVE_STRENGTH_BIT_MSK(name) (DRIVE_STRENGTH_BIT_##name << \ + DRIVE_STRENGTH_SHIFT) /** * struct at91_pmx_func - describes AT91 pinmux functions @@ -551,7 +556,7 @@ static unsigned at91_mux_sama5d3_get_drivestrength(void __iomem *pio, /* SAMA5 strength is 1:1 with our defines, * except 0 is equivalent to low per datasheet */ if (!tmp) - tmp = DRIVE_STRENGTH_LOW; + tmp = DRIVE_STRENGTH_BIT_MSK(LOW); return tmp; } @@ -564,7 +569,7 @@ static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio, /* strength is inverse in SAM9x5s hardware with the pinctrl defines * hardware: 0 = hi, 1 = med, 2 = low, 3 = rsvd */ - tmp = DRIVE_STRENGTH_HI - tmp; + tmp = DRIVE_STRENGTH_BIT_MSK(HI) - tmp; return tmp; } @@ -600,7 +605,7 @@ static void at91_mux_sam9x5_set_drivestrength(void __iomem *pio, unsigned pin, /* strength is inverse on SAM9x5s with our defines * 0 = hi, 1 = med, 2 = low, 3 = rsvd */ - setting = DRIVE_STRENGTH_HI - setting; + setting = DRIVE_STRENGTH_BIT_MSK(HI) - setting; set_drive_strength(pio + at91sam9x5_get_drive_register(pin), pin, setting); @@ -959,11 +964,11 @@ static int at91_pinconf_set(struct pinctrl_dev *pctldev, } \ } while (0) -#define DBG_SHOW_FLAG_MASKED(mask,flag) do { \ +#define DBG_SHOW_FLAG_MASKED(mask, flag, name) do { \ if ((config & mask) == flag) { \ if (num_conf) \ seq_puts(s, "|"); \ - seq_puts(s, #flag); \ + seq_puts(s, #name); \ num_conf++; \ } \ } while (0) @@ -981,9 +986,12 @@ static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev, DBG_SHOW_FLAG(PULL_DOWN); DBG_SHOW_FLAG(DIS_SCHMIT); DBG_SHOW_FLAG(DEGLITCH); - DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_LOW); - DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_MED); - DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_HI); + DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(LOW), + DRIVE_STRENGTH_LOW); + DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(MED), + DRIVE_STRENGTH_MED); + DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(HI), + DRIVE_STRENGTH_HI); DBG_SHOW_FLAG(DEBOUNCE); if (config & DEBOUNCE) { val = config >> DEBOUNCE_VAL_SHIFT; |