diff options
Diffstat (limited to 'arch/arm/mach-mmp/mfp.h')
| -rw-r--r-- | arch/arm/mach-mmp/mfp.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-mmp/mfp.h b/arch/arm/mach-mmp/mfp.h new file mode 100644 index 000000000..6f3057987 --- /dev/null +++ b/arch/arm/mach-mmp/mfp.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_MACH_MFP_H +#define __ASM_MACH_MFP_H + +#include <linux/soc/pxa/mfp.h> + +/* + * NOTE: the MFPR register bit definitions on PXA168 processor lines are a + * bit different from those on PXA3xx. Bit [7:10] are now reserved, which + * were SLEEP_OE_N, SLEEP_DATA, SLEEP_SEL and the LSB of DRIVE bits. + * + * To cope with this difference and re-use the pxa3xx mfp code as much as + * possible, we make the following compromise: + * + * 1. SLEEP_OE_N will always be programmed to '1' (by MFP_LPM_FLOAT) + * 2. DRIVE strength definitions redefined to include the reserved bit + * - the reserved bit differs between pxa168 and pxa910, and the + * MFP_DRIVE_* macros are individually defined in mfp-pxa{168,910}.h + * 3. Override MFP_CFG() and MFP_CFG_DRV() + * 4. Drop the use of MFP_CFG_LPM() and MFP_CFG_X() + */ + +#undef MFP_CFG +#undef MFP_CFG_DRV +#undef MFP_CFG_LPM +#undef MFP_CFG_X +#undef MFP_CFG_DEFAULT + +#define MFP_CFG(pin, af) \ + (MFP_LPM_FLOAT | MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_DRIVE_MEDIUM) + +#define MFP_CFG_DRV(pin, af, drv) \ + (MFP_LPM_FLOAT | MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_DRIVE_##drv) + +#endif /* __ASM_MACH_MFP_H */ |