static int set_bl_intensity(struct mxs_platform_bl_data *data,
struct backlight_device *bd, int suspended)
{
int intensity = bd->props.brightness;
int scaled_int;
if (bd->props.power != FB_BLANK_UNBLANK)
intensity = 0;
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
if (suspended)
intensity = 0;
scaled_int = ((intensity*2)+170);
if(!intensity) scaled_int = 0;
__raw_writel(BF_PWM_ACTIVEn_INACTIVE(scaled_int) |
BF_PWM_ACTIVEn_ACTIVE(0),
REGS_PWM_BASE + HW_PWM_ACTIVEn(4));
__raw_writel(BF_PWM_PERIODn_CDIV(6) | /* divide by 64 */
BF_PWM_PERIODn_INACTIVE_STATE(2) | /* low */
BF_PWM_PERIODn_ACTIVE_STATE(3) | /* high */
BF_PWM_PERIODn_PERIOD(399),
REGS_PWM_BASE + HW_PWM_PERIODn(4));
return 0;
}
static int init_bl(struct stmp3xxx_platform_bl_data *data)
{
int ret = 0;
pwm_clk = clk_get(NULL, "pwm");
if (IS_ERR(pwm_clk)) {
ret = PTR_ERR(pwm_clk);
goto out;
}
clk_enable(pwm_clk);
stmp3xxx_reset_block(REGS_PWM_BASE, 1);
ret = stmp3xxx_request_pin(PINID_PWM2, PIN_FUN1, "lcd_lms430");
if (ret)
goto out_mux;
stmp3xxx_pin_voltage(PINID_PWM2, PIN_8MA, "lcd_lms430");
stmp3xxx_pin_strength(PINID_PWM2, PIN_3_3V, "lcd_lms430");
HW_PWM_ACTIVEn_WR(2, BF_PWM_ACTIVEn_INACTIVE(0) |
BF_PWM_ACTIVEn_ACTIVE(0));
HW_PWM_PERIODn_WR(2,
BF_PWM_PERIODn_CDIV(6) | /* divide by 64 */
BF_PWM_PERIODn_INACTIVE_STATE(2) | /* low */
BF_PWM_PERIODn_ACTIVE_STATE(3) | /* high */
BF_PWM_PERIODn_PERIOD(599));
HW_PWM_CTRL_SET(BM_PWM_CTRL_PWM2_ENABLE);
return 0;
out_mux:
clk_put(pwm_clk);
out:
return ret;
}
static void free_bl(struct mxs_platform_bl_data *data)
{
__raw_writel(BF_PWM_ACTIVEn_INACTIVE(0) |
BF_PWM_ACTIVEn_ACTIVE(0),
REGS_PWM_BASE + HW_PWM_ACTIVEn(2));
__raw_writel(BF_PWM_PERIODn_CDIV(6) | /* divide by 64 */
BF_PWM_PERIODn_INACTIVE_STATE(2) | /* low */
BF_PWM_PERIODn_ACTIVE_STATE(3) | /* high */
BF_PWM_PERIODn_PERIOD(599),
REGS_PWM_BASE + HW_PWM_PERIODn(2));
__raw_writel(BM_PWM_CTRL_PWM2_ENABLE, REGS_PWM_BASE + HW_PWM_CTRL_CLR);
clk_disable(pwm_clk);
clk_put(pwm_clk);
}
static void free_bl(struct stmp3xxx_platform_bl_data *data)
{
HW_PWM_ACTIVEn_WR(2, BF_PWM_ACTIVEn_INACTIVE(0) |
BF_PWM_ACTIVEn_ACTIVE(0));
HW_PWM_PERIODn_WR(2,
BF_PWM_PERIODn_CDIV(6) | /* divide by 64 */
BF_PWM_PERIODn_INACTIVE_STATE(2) | /* low */
BF_PWM_PERIODn_ACTIVE_STATE(3) | /* high */
BF_PWM_PERIODn_PERIOD(599));
HW_PWM_CTRL_CLR(BM_PWM_CTRL_PWM2_ENABLE);
stmp3xxx_pin_voltage(PINID_PWM2, PIN_4MA, "lcd_lms430");
stmp3xxx_pin_strength(PINID_PWM2, PIN_1_8V, "lcd_lms430");
stmp3xxx_release_pin(PINID_PWM2, "lcd_lms430");
clk_disable(pwm_clk);
clk_put(pwm_clk);
}
static int init_bl(struct mxs_platform_bl_data *data)
{
int ret = 0;
pwm_clk = clk_get(NULL, "pwm");
if (IS_ERR(pwm_clk)) {
ret = PTR_ERR(pwm_clk);
return ret;
}
clk_enable(pwm_clk);
mxs_reset_block(REGS_PWM_BASE, 1);
__raw_writel(BF_PWM_ACTIVEn_INACTIVE(400) |
BF_PWM_ACTIVEn_ACTIVE(0),
REGS_PWM_BASE + HW_PWM_ACTIVEn(4));
__raw_writel(BF_PWM_PERIODn_CDIV(6) | /* divide by 64 */
BF_PWM_PERIODn_INACTIVE_STATE(2) | /* low */
BF_PWM_PERIODn_ACTIVE_STATE(3) | /* high */
BF_PWM_PERIODn_PERIOD(599),
REGS_PWM_BASE + HW_PWM_PERIODn(4));
__raw_writel(BM_PWM_CTRL_PWM4_ENABLE, REGS_PWM_BASE + HW_PWM_CTRL_SET);
__raw_writel(BF_PINCTRL_DOUT3_DOUT(1 << 30), REGS_PINCTRL_BASE + HW_PINCTRL_DOUT3_SET);
return 0;
}
static int set_bl_intensity(struct mxs_platform_bl_data *data,
struct backlight_device *bd, int suspended)
{
int intensity = bd->props.brightness;
int scaled_int;
if (bd->props.power != FB_BLANK_UNBLANK)
intensity = 0;
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
if (suspended)
intensity = 0;
/*
* This is not too cool but what can we do?
* Luminance changes non-linearly...
*/
if (regulator_set_current_limit
(data->regulator, bl_to_power(intensity), bl_to_power(intensity)))
return -EBUSY;
scaled_int = values[intensity / 10];
if (scaled_int < 100) {
int rem = intensity - 10 * (intensity / 10); /* r = i % 10; */
scaled_int += rem * (values[intensity / 10 + 1] -
values[intensity / 10]) / 10;
}
__raw_writel(BF_PWM_ACTIVEn_INACTIVE(scaled_int) |
BF_PWM_ACTIVEn_ACTIVE(0),
REGS_PWM_BASE + HW_PWM_ACTIVEn(2));
__raw_writel(BF_PWM_PERIODn_CDIV(6) | /* divide by 64 */
BF_PWM_PERIODn_INACTIVE_STATE(2) | /* low */
BF_PWM_PERIODn_ACTIVE_STATE(3) | /* high */
BF_PWM_PERIODn_PERIOD(399),
REGS_PWM_BASE + HW_PWM_PERIODn(2));
return 0;
}
