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authorCodrin Ciubotariu <codrin.ciubotariu@microchip.com>2019-11-01 11:20:31 +0200
committerLinus Walleij <linus.walleij@linaro.org>2019-11-03 23:34:47 +0100
commit0b3292852863215825f88905b9dbafc3101e1d7e (patch)
tree89e8f234c15bf20230d88ee4b0271acf44c13366 /drivers/pinctrl/pinctrl-at91.c
parentaa5f2af535f711e78ac26789c34739037ec1c474 (diff)
pinctrl: at91: Enable slewrate by default on SAM9X60
On SAM9X60, slewrate should be enabled on pins with a switching frequency below 50Mhz. Since most of our pins do not exceed this value, we enable slewrate by default. Pins with a switching value that exceeds 50Mhz will have to explicitly disable slewrate. This patch changes the ABI. However, the slewrate macros are only used by SAM9X60 and, at this moment, there are no device-tree files available for this platform. Suggested-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Link: https://lore.kernel.org/r/20191101092031.24896-1-codrin.ciubotariu@microchip.com Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 117075b5798f..c135149e84e9 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -85,8 +85,8 @@ enum drive_strength_bit {
DRIVE_STRENGTH_SHIFT)
enum slewrate_bit {
- SLEWRATE_BIT_DIS,
SLEWRATE_BIT_ENA,
+ SLEWRATE_BIT_DIS,
};
#define SLEWRATE_BIT_MSK(name) (SLEWRATE_BIT_##name << SLEWRATE_SHIFT)
@@ -669,7 +669,7 @@ static void at91_mux_sam9x60_set_slewrate(void __iomem *pio, unsigned pin,
{
unsigned int tmp;
- if (setting < SLEWRATE_BIT_DIS || setting > SLEWRATE_BIT_ENA)
+ if (setting < SLEWRATE_BIT_ENA || setting > SLEWRATE_BIT_DIS)
return;
tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR);