Hello.
On 10/26/2015 11:44 PM, Swetha wrote:
This patch fixes the issue:
CHECK: usleep_range is preferred over udelay; see
Documentation/timers/timers-howto.txt
Signed-off-by: Swetha <theonly.ultimate@xxxxxxxxx>
Full (and true) name needed here.
---
drivers/staging/panel/panel.c | 34 +++++++++++++++++++---------------
1 file changed, 19 insertions(+), 15 deletions(-)
diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
index 11a50f6..66ad4d0 100644
--- a/drivers/staging/panel/panel.c
+++ b/drivers/staging/panel/panel.c
@@ -825,7 +825,8 @@ static void lcd_write_cmd_s(int cmd)
lcd_send_serial(0x1F); /* R/W=W, RS=0 */
lcd_send_serial(cmd & 0x0F);
lcd_send_serial((cmd >> 4) & 0x0F);
- udelay(40); /* the shortest command takes at least 40 us */
+ /* the shortest command takes at least 40 us */
+ usleep_range(40, 100);
spin_unlock_irq(&pprt_lock);
You can't sleep in the atomic context, you're holding a spinlock.
}
@@ -836,7 +837,8 @@ static void lcd_write_data_s(int data)
lcd_send_serial(0x5F); /* R/W=W, RS=1 */
lcd_send_serial(data & 0x0F);
lcd_send_serial((data >> 4) & 0x0F);
- udelay(40); /* the shortest data takes at least 40 us */
+ /* the shortest data takes at least 40 us */
+ usleep_range(40, 100);
spin_unlock_irq(&pprt_lock);
Likewise.
}
@@ -846,19 +848,20 @@ static void lcd_write_cmd_p8(int cmd)
spin_lock_irq(&pprt_lock);
/* present the data to the data port */
w_dtr(pprt, cmd);
- udelay(20); /* maintain the data during 20 us before the strobe */
+ /* maintain the data during 20 us before the strobe */
+ usleep_range(20, 100);
bits.e = BIT_SET;
bits.rs = BIT_CLR;
bits.rw = BIT_CLR;
set_ctrl_bits();
- udelay(40); /* maintain the strobe during 40 us */
+ usleep_range(40, 100); /* maintain the strobe during 40 us */
bits.e = BIT_CLR;
set_ctrl_bits();
- udelay(120); /* the shortest command takes at least 120 us */
+ usleep_range(120, 500); /* the shortest command takes at least 120 us */
Likewise.
spin_unlock_irq(&pprt_lock);
}
@@ -868,19 +871,20 @@ static void lcd_write_data_p8(int data)
spin_lock_irq(&pprt_lock);
/* present the data to the data port */
w_dtr(pprt, data);
- udelay(20); /* maintain the data during 20 us before the strobe */
+ /* maintain the data during 20 us before the strobe */
+ usleep_range(20, 100);
bits.e = BIT_SET;
bits.rs = BIT_SET;
bits.rw = BIT_CLR;
set_ctrl_bits();
- udelay(40); /* maintain the strobe during 40 us */
+ usleep_range(40, 100); /* maintain the strobe during 40 us */
bits.e = BIT_CLR;
set_ctrl_bits();
- udelay(45); /* the shortest data takes at least 45 us */
+ usleep_range(45, 100); /* the shortest data takes at least 45 us */
spin_unlock_irq(&pprt_lock);
Likewise.
}
@@ -890,7 +894,7 @@ static void lcd_write_cmd_tilcd(int cmd)
spin_lock_irq(&pprt_lock);
/* present the data to the control port */
w_ctr(pprt, cmd);
- udelay(60);
+ usleep_range(60, 120);
spin_unlock_irq(&pprt_lock);
}
@@ -900,7 +904,7 @@ static void lcd_write_data_tilcd(int data)
spin_lock_irq(&pprt_lock);
/* present the data to the data port */
w_dtr(pprt, data);
- udelay(60);
+ usleep_range(60, 120);
spin_unlock_irq(&pprt_lock);
}
@@ -943,7 +947,7 @@ static void lcd_clear_fast_s(void)
lcd_send_serial(0x5F); /* R/W=W, RS=1 */
lcd_send_serial(' ' & 0x0F);
lcd_send_serial((' ' >> 4) & 0x0F);
- udelay(40); /* the shortest data takes at least 40 us */
+ usleep_range(40, 100); /* the shortest data takes at least 40 us */
}
spin_unlock_irq(&pprt_lock);
Likewise.
@@ -967,7 +971,7 @@ static void lcd_clear_fast_p8(void)
w_dtr(pprt, ' ');
/* maintain the data during 20 us before the strobe */
- udelay(20);
+ usleep_range(20, 100);
bits.e = BIT_SET;
bits.rs = BIT_SET;
@@ -975,13 +979,13 @@ static void lcd_clear_fast_p8(void)
set_ctrl_bits();
/* maintain the strobe during 40 us */
- udelay(40);
+ usleep_range(40, 100);
bits.e = BIT_CLR;
set_ctrl_bits();
/* the shortest data takes at least 45 us */
- udelay(45);
+ usleep_range(45, 100);
}
spin_unlock_irq(&pprt_lock);
Likeise.
@@ -1003,7 +1007,7 @@ static void lcd_clear_fast_tilcd(void)
for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
/* present the data to the data port */
w_dtr(pprt, ' ');
- udelay(60);
+ usleep_range(60, 120);
}
spin_unlock_irq(&pprt_lock);
Likewise.
MBR, Sergei
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