lkml.org 
[lkml]   [2019]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v2 1/7] pinctrl: at91: add option to use drive strength bits
Date


On 06.02.2019 10:13, Ludovic Desroches wrote:
> On Thu, Jan 31, 2019 at 05:18:04PM +0100, Claudiu Beznea - M18063 wrote:
>> From: Claudiu Beznea <claudiu.beznea@microchip.com>
>>
>> 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>
>> ---
>> drivers/pinctrl/pinctrl-at91.c | 32 ++++++++++++++++++++------------
>> 1 file changed, 20 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
>> index 3d49bbbcdbc7..31f06dafca2e 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 { \
>
> checkpatch error: space required

I'm aware of that but I added it in the way it was previously (were the
checkpatch error was still present). Please let me know if you want me to
send a new version fixing this.

Thank you,
Claudiu Beznea

>
>> 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;
>> --
>> 2.7.4
>>
>
\
 
 \ /
  Last update: 2019-02-06 10:46    [W:0.103 / U:26.836 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site