diff options
| author | Lars Povlsen <lars.povlsen@microchip.com> | 2018-12-20 09:56:03 +0100 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2019-01-16 13:56:43 +0100 |
| commit | e58031acdc84bbd3c2d22fab4455a0f079f936a0 (patch) | |
| tree | 0c0ac2192a58e8110e6e8a891edaf4cf03196d37 /arch/mips/mach-mscc/gpio.c | |
| parent | 3098ade229af721c8b64b423e2e11f5896b45710 (diff) | |
| download | u-boot-e58031acdc84bbd3c2d22fab4455a0f079f936a0.tar.gz | |
mips: mscc: Add generic GPIO control utility function
The GPIO control function can be used for controlling alternate
functions associated with a GPIO.
Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Diffstat (limited to 'arch/mips/mach-mscc/gpio.c')
| -rw-r--r-- | arch/mips/mach-mscc/gpio.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/mips/mach-mscc/gpio.c b/arch/mips/mach-mscc/gpio.c new file mode 100644 index 0000000000..5e3a53372d --- /dev/null +++ b/arch/mips/mach-mscc/gpio.c @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright (c) 2018 Microsemi Corporation + */ + +#include <common.h> +#include <asm/io.h> + +void mscc_gpio_set_alternate(int gpio, int mode) +{ + u32 mask = BIT(gpio); + u32 val0, val1; + + val0 = readl(BASE_DEVCPU_GCB + GPIO_ALT(0)); + val1 = readl(BASE_DEVCPU_GCB + GPIO_ALT(1)); + + if (mode == 1) { + val0 |= mask; + val1 &= ~mask; + } else if (mode == 2) { + val0 &= ~mask; + val1 |= mask; + } else if (mode == 3) { + val0 |= mask; + val1 |= mask; + } else { + val0 &= ~mask; + val1 &= ~mask; + } + + writel(val0, BASE_DEVCPU_GCB + GPIO_ALT(0)); + writel(val1, BASE_DEVCPU_GCB + GPIO_ALT(1)); +} |