diff options
Diffstat (limited to 'drivers/staging/fbtft/fb_ili9325.c')
| -rw-r--r-- | drivers/staging/fbtft/fb_ili9325.c | 81 |
1 files changed, 41 insertions, 40 deletions
diff --git a/drivers/staging/fbtft/fb_ili9325.c b/drivers/staging/fbtft/fb_ili9325.c index 3b3a06d8a..fdf98d375 100644 --- a/drivers/staging/fbtft/fb_ili9325.c +++ b/drivers/staging/fbtft/fb_ili9325.c @@ -56,42 +56,42 @@ module_param(vcm, uint, 0); MODULE_PARM_DESC(vcm, "Set the internal VcomH voltage"); /* -Verify that this configuration is within the Voltage limits - -Display module configuration: Vcc = IOVcc = Vci = 3.3V - - Voltages ----------- -Vci = 3.3 -Vci1 = Vci * 0.80 = 2.64 -DDVDH = Vci1 * 2 = 5.28 -VCL = -Vci1 = -2.64 -VREG1OUT = Vci * 1.85 = 4.88 -VCOMH = VREG1OUT * 0.735 = 3.59 -VCOM amplitude = VREG1OUT * 0.98 = 4.79 -VGH = Vci * 4 = 13.2 -VGL = -Vci * 4 = -13.2 - - Limits --------- -Power supplies -1.65 < IOVcc < 3.30 => 1.65 < 3.3 < 3.30 -2.40 < Vcc < 3.30 => 2.40 < 3.3 < 3.30 -2.50 < Vci < 3.30 => 2.50 < 3.3 < 3.30 - -Source/VCOM power supply voltage - 4.50 < DDVDH < 6.0 => 4.50 < 5.28 < 6.0 --3.0 < VCL < -2.0 => -3.0 < -2.64 < -2.0 -VCI - VCL < 6.0 => 5.94 < 6.0 - -Gate driver output voltage - 10 < VGH < 20 => 10 < 13.2 < 20 --15 < VGL < -5 => -15 < -13.2 < -5 -VGH - VGL < 32 => 26.4 < 32 - -VCOM driver output voltage -VCOMH - VCOML < 6.0 => 4.79 < 6.0 -*/ + * Verify that this configuration is within the Voltage limits + * + * Display module configuration: Vcc = IOVcc = Vci = 3.3V + * + * Voltages + * ---------- + * Vci = 3.3 + * Vci1 = Vci * 0.80 = 2.64 + * DDVDH = Vci1 * 2 = 5.28 + * VCL = -Vci1 = -2.64 + * VREG1OUT = Vci * 1.85 = 4.88 + * VCOMH = VREG1OUT * 0.735 = 3.59 + * VCOM amplitude = VREG1OUT * 0.98 = 4.79 + * VGH = Vci * 4 = 13.2 + * VGL = -Vci * 4 = -13.2 + * + * Limits + * -------- + * Power supplies + * 1.65 < IOVcc < 3.30 => 1.65 < 3.3 < 3.30 + * 2.40 < Vcc < 3.30 => 2.40 < 3.3 < 3.30 + * 2.50 < Vci < 3.30 => 2.50 < 3.3 < 3.30 + * + * Source/VCOM power supply voltage + * 4.50 < DDVDH < 6.0 => 4.50 < 5.28 < 6.0 + * -3.0 < VCL < -2.0 => -3.0 < -2.64 < -2.0 + * VCI - VCL < 6.0 => 5.94 < 6.0 + * + * Gate driver output voltage + * 10 < VGH < 20 => 10 < 13.2 < 20 + * -15 < VGL < -5 => -15 < -13.2 < -5 + * VGH - VGL < 32 => 26.4 < 32 + * + * VCOM driver output voltage + * VCOMH - VCOML < 6.0 => 4.79 < 6.0 + */ static int init_display(struct fbtft_par *par) { @@ -213,10 +213,10 @@ static int set_var(struct fbtft_par *par) } /* - Gamma string format: - VRP0 VRP1 RP0 RP1 KP0 KP1 KP2 KP3 KP4 KP5 - VRN0 VRN1 RN0 RN1 KN0 KN1 KN2 KN3 KN4 KN5 -*/ + * Gamma string format: + * VRP0 VRP1 RP0 RP1 KP0 KP1 KP2 KP3 KP4 KP5 + * VRN0 VRN1 RN0 RN1 KN0 KN1 KN2 KN3 KN4 KN5 + */ #define CURVE(num, idx) curves[num * par->gamma.num_values + idx] static int set_gamma(struct fbtft_par *par, unsigned long *curves) { @@ -245,6 +245,7 @@ static int set_gamma(struct fbtft_par *par, unsigned long *curves) return 0; } + #undef CURVE static struct fbtft_display display = { |