Staging: fbtft: Fix GPIO handling

Commit c440eee1a7a1 ("Staging: fbtft: Switch to the gpio descriptor
interface") breaks GPIO handling. In several places, checks to only set
a GPIO if it was configured ended up backwards.
I have tested this fix. The fixed driver works with a ili9486
display connected to a raspberry pi via SPI.

Fixes: c440eee1a7a1d ("Staging: fbtft: Switch to the gpio descriptor interface")
Tested-by: Jan Sebastian Götte <linux@jaseg.net>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Jan Sebastian Götte <linux@jaseg.net>
Link: https://lore.kernel.org/r/75ada52f-afa1-08bc-d0ce-966fc1110e70@jaseg.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fbtft/fb_bd663474.c b/drivers/staging/fbtft/fb_bd663474.c
index b6c6d66..e2c7646 100644 (file)
--- a/drivers/staging/fbtft/fb_bd663474.c
+++ b/drivers/staging/fbtft/fb_bd663474.c
@@ -24,7 +24,7 @@
 
 static int init_display(struct fbtft_par *par)
 {
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        par->fbtftops.reset(par);

diff --git a/drivers/staging/fbtft/fb_ili9163.c b/drivers/staging/fbtft/fb_ili9163.c
index d609a2b..fd32376 100644 (file)
--- a/drivers/staging/fbtft/fb_ili9163.c
+++ b/drivers/staging/fbtft/fb_ili9163.c
@@ -77,7 +77,7 @@ static int init_display(struct fbtft_par *par)
 {
        par->fbtftops.reset(par);
 
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        write_reg(par, MIPI_DCS_SOFT_RESET); /* software reset */

diff --git a/drivers/staging/fbtft/fb_ili9325.c b/drivers/staging/fbtft/fb_ili9325.c
index b090e7a..85e54a1 100644 (file)
--- a/drivers/staging/fbtft/fb_ili9325.c
+++ b/drivers/staging/fbtft/fb_ili9325.c
@@ -85,7 +85,7 @@ static int init_display(struct fbtft_par *par)
 {
        par->fbtftops.reset(par);
 
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        bt &= 0x07;

diff --git a/drivers/staging/fbtft/fb_s6d1121.c b/drivers/staging/fbtft/fb_s6d1121.c
index b3d0701..5a129b1 100644 (file)
--- a/drivers/staging/fbtft/fb_s6d1121.c
+++ b/drivers/staging/fbtft/fb_s6d1121.c
@@ -29,7 +29,7 @@ static int init_display(struct fbtft_par *par)
 {
        par->fbtftops.reset(par);
 
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        /* Initialization sequence from Lib_UTFT */

diff --git a/drivers/staging/fbtft/fb_ssd1289.c b/drivers/staging/fbtft/fb_ssd1289.c
index bbf75f7..88a5b69 100644 (file)
--- a/drivers/staging/fbtft/fb_ssd1289.c
+++ b/drivers/staging/fbtft/fb_ssd1289.c
@@ -28,7 +28,7 @@ static int init_display(struct fbtft_par *par)
 {
        par->fbtftops.reset(par);
 
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        write_reg(par, 0x00, 0x0001);

diff --git a/drivers/staging/fbtft/fb_ssd1331.c b/drivers/staging/fbtft/fb_ssd1331.c
index 4cfe9f8..37622c9 100644 (file)
--- a/drivers/staging/fbtft/fb_ssd1331.c
+++ b/drivers/staging/fbtft/fb_ssd1331.c
@@ -81,7 +81,7 @@ static void write_reg8_bus8(struct fbtft_par *par, int len, ...)
        va_start(args, len);
 
        *buf = (u8)va_arg(args, unsigned int);
-       if (!par->gpio.dc)
+       if (par->gpio.dc)
                gpiod_set_value(par->gpio.dc, 0);
        ret = par->fbtftops.write(par, par->buf, sizeof(u8));
        if (ret < 0) {
@@ -104,7 +104,7 @@ static void write_reg8_bus8(struct fbtft_par *par, int len, ...)
                        return;
                }
        }
-       if (!par->gpio.dc)
+       if (par->gpio.dc)
                gpiod_set_value(par->gpio.dc, 1);
        va_end(args);
 }

diff --git a/drivers/staging/fbtft/fb_upd161704.c b/drivers/staging/fbtft/fb_upd161704.c
index 564a38e..c77832a 100644 (file)
--- a/drivers/staging/fbtft/fb_upd161704.c
+++ b/drivers/staging/fbtft/fb_upd161704.c
@@ -26,7 +26,7 @@ static int init_display(struct fbtft_par *par)
 {
        par->fbtftops.reset(par);
 
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        /* Initialization sequence from Lib_UTFT */

diff --git a/drivers/staging/fbtft/fbtft-bus.c b/drivers/staging/fbtft/fbtft-bus.c
index 2ea814d..63c65dd 100644 (file)
--- a/drivers/staging/fbtft/fbtft-bus.c
+++ b/drivers/staging/fbtft/fbtft-bus.c
@@ -135,7 +135,7 @@ int fbtft_write_vmem16_bus8(struct fbtft_par *par, size_t offset, size_t len)
        remain = len / 2;
        vmem16 = (u16 *)(par->info->screen_buffer + offset);
 
-       if (!par->gpio.dc)
+       if (par->gpio.dc)
                gpiod_set_value(par->gpio.dc, 1);
 
        /* non buffered write */

diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
index c3179cc..cf5700a 100644 (file)
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -918,7 +918,7 @@ static int fbtft_init_display_dt(struct fbtft_par *par)
                return -EINVAL;
 
        par->fbtftops.reset(par);
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        while (p) {
@@ -1009,7 +1009,7 @@ int fbtft_init_display(struct fbtft_par *par)
        }
 
        par->fbtftops.reset(par);
-       if (!par->gpio.cs)
+       if (par->gpio.cs)
                gpiod_set_value(par->gpio.cs, 0);  /* Activate chip */
 
        i = 0;