Commit e499ada8 authored by Magnus Damm's avatar Magnus Damm Committed by Paul Mundt
Browse files

sh: pfc: Unlock register support 



Add PFC support for a 32-bit unlock register. Needed to
drive the r8a7779 PFC that comes with a funky PMMR register.

Signed-off-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent f78a26f5

drivers/sh/pfc.c

+10 −12
Original line number Diff line number Diff line
@@ -210,7 +210,7 @@ static void write_config_reg(struct pinmux_info *gpioc, 
			     unsigned long field, unsigned long value)

{

	void __iomem *mapped_reg;

	unsigned long mask, pos;

	unsigned long mask, pos, data;



	config_reg_helper(gpioc, crp, field, &mapped_reg, &mask, &pos);
@@ -221,17 +221,15 @@ static void write_config_reg(struct pinmux_info *gpioc, 
	mask = ~(mask << pos);

	value = value << pos;



	switch (crp->reg_width) {

	case 8:

		iowrite8((ioread8(mapped_reg) & mask) | value, mapped_reg);

		break;

	case 16:

		iowrite16((ioread16(mapped_reg) & mask) | value, mapped_reg);

		break;

	case 32:

		iowrite32((ioread32(mapped_reg) & mask) | value, mapped_reg);

		break;

	}

	data = gpio_read_raw_reg(mapped_reg, crp->reg_width);

	data &= mask;

	data |= value;



	if (gpioc->unlock_reg)

		gpio_write_raw_reg(pfc_phys_to_virt(gpioc, gpioc->unlock_reg),

				   32, ~data);



	gpio_write_raw_reg(mapped_reg, crp->reg_width, data);

}



static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio)

include/linux/sh_pfc.h

+2 −0
Original line number Diff line number Diff line
@@ -116,6 +116,8 @@ struct pinmux_info { 
	unsigned int num_resources;

	struct pfc_window *window;



	unsigned long unlock_reg;



	struct gpio_chip chip;

};