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Commit 96f6a13a authored by Eric Miao's avatar Eric Miao
Browse files

[ARM] pxa/cm-x270: avoid direct access of GPIO/MFP registers 



Cc: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: default avatarEric Miao <eric.y.miao@gmail.com>
parent 846c864c

arch/arm/mach-pxa/cm-x270.c

+43 −19
Original line number Diff line number Diff line
@@ -176,33 +176,57 @@ static struct resource cmx270_2700G_resource[] = { 
	},

};



static unsigned long save_lcd_regs[10];

static unsigned long cmx270_marathon_on[] = {

	GPIO58_GPIO,

	GPIO59_GPIO,

	GPIO60_GPIO,

	GPIO61_GPIO,

	GPIO62_GPIO,

	GPIO63_GPIO,

	GPIO64_GPIO,

	GPIO65_GPIO,

	GPIO66_GPIO,

	GPIO67_GPIO,

	GPIO68_GPIO,

	GPIO69_GPIO,

	GPIO70_GPIO,

	GPIO71_GPIO,

	GPIO72_GPIO,

	GPIO73_GPIO,

	GPIO74_GPIO,

	GPIO75_GPIO,

	GPIO76_GPIO,

	GPIO77_GPIO,

};



static unsigned long cmx270_marathon_off[] = {

	GPIOxx_LCD_TFT_16BPP,

};



static int cmx270_marathon_probe(struct fb_info *fb)

{

	/* save PXA-270 pin settings before enabling 2700G */

	save_lcd_regs[0] = GPDR1;

	save_lcd_regs[1] = GPDR2;

	save_lcd_regs[2] = GAFR1_U;

	save_lcd_regs[3] = GAFR2_L;

	save_lcd_regs[4] = GAFR2_U;



	/* Disable PXA-270 on-chip controller driving pins */

	GPDR1 &= ~(0xfc000000);

	GPDR2 &= ~(0x00c03fff);

	GAFR1_U &= ~(0xfff00000);

	GAFR2_L &= ~(0x0fffffff);

	GAFR2_U &= ~(0x0000f000);

	int gpio, err;



	for (gpio = 58; gpio <= 77; gpio++) {

		err = gpio_request(gpio, "LCD");

		if (err)

			return err;

		gpio_direction_input(gpio);

	}



	pxa2xx_mfp_config(ARRAY_AND_SIZE(cmx270_marathon_on));

	return 0;

}



static int cmx270_marathon_remove(struct fb_info *fb)

{

	GPDR1 =   save_lcd_regs[0];

	GPDR2 =   save_lcd_regs[1];

	GAFR1_U = save_lcd_regs[2];

	GAFR2_L = save_lcd_regs[3];

	GAFR2_U = save_lcd_regs[4];

	int gpio;



	pxa2xx_mfp_config(ARRAY_AND_SIZE(cmx270_marathon_off));



	for (gpio = 58; gpio <= 77; gpio++)

		gpio_free(gpio);



	return 0;

}