[PATCH v3 0/3] Style changes

[PATCH v3 0/3] Style changes

[Leonardo Brás]

Some style changes to help readability.

Leonardo Brás (3):
  staging: fbtft: Includes description to mutex and spinlock - Style
  staging: fbtft: Replaces (1 << n) for macro BIT(n) - Style
  staging: fbtft: Corrects long index line  - Style

 drivers/staging/fbtft/fbtft-sysfs.c |  5 ++-
 drivers/staging/fbtft/fbtft.h       | 60 ++++++++++++++---------------
 2 files changed, 34 insertions(+), 31 deletions(-)

-- 
2.18.0

[PATCH v3 1/3] staging: fbtft: Includes description to mutex and spinlock - Style

[Leonardo Brás]

Adds comments explaining what are the spinlock and mutex used for.

Signed-off-by: Leonardo Brás <leobras.c@gmail.com>
---
 drivers/staging/fbtft/fbtft.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/fbtft/fbtft.h b/drivers/staging/fbtft/fbtft.h
index 798a8fe98e95..958835da433c 100644
--- a/drivers/staging/fbtft/fbtft.h
+++ b/drivers/staging/fbtft/fbtft.h
@@ -203,7 +203,7 @@ struct fbtft_par {
 	u8 *buf;
 	u8 startbyte;
 	struct fbtft_ops fbtftops;
-	spinlock_t dirty_lock;
+	spinlock_t dirty_lock; /* Protects dirty_lines_{start,end} */
 	unsigned int dirty_lines_start;
 	unsigned int dirty_lines_end;
 	struct {
@@ -219,7 +219,7 @@ struct fbtft_par {
 	} gpio;
 	const s16 *init_sequence;
 	struct {
-		struct mutex lock;
+		struct mutex lock; /* Mutex for Gamma curve locking */
 		u32 *curves;
 		int num_values;
 		int num_curves;
-- 
2.18.0

[PATCH v3 2/3] staging: fbtft: Replaces (1 << n) for macro BIT(n) - Style

[Leonardo Brás]

Use of default macro BIT(n) instead of (1 << n). Helps readability.

Signed-off-by: Leonardo Brás <leobras.c@gmail.com>
---
 drivers/staging/fbtft/fbtft.h | 56 +++++++++++++++++------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/drivers/staging/fbtft/fbtft.h b/drivers/staging/fbtft/fbtft.h
index 958835da433c..efdad47ccd26 100644
--- a/drivers/staging/fbtft/fbtft.h
+++ b/drivers/staging/fbtft/fbtft.h
@@ -355,39 +355,39 @@ module_exit(fbtft_driver_module_exit);
 #define DEBUG_LEVEL_6	(DEBUG_LEVEL_4 | DEBUG_LEVEL_5)
 #define DEBUG_LEVEL_7	0xFFFFFFFF
 
-#define DEBUG_DRIVER_INIT_FUNCTIONS (1<<3)
-#define DEBUG_TIME_FIRST_UPDATE     (1<<4)
-#define DEBUG_TIME_EACH_UPDATE      (1<<5)
-#define DEBUG_DEFERRED_IO           (1<<6)
-#define DEBUG_FBTFT_INIT_FUNCTIONS  (1<<7)
+#define DEBUG_DRIVER_INIT_FUNCTIONS	BIT(3)
+#define DEBUG_TIME_FIRST_UPDATE	BIT(4)
+#define DEBUG_TIME_EACH_UPDATE		BIT(5)
+#define DEBUG_DEFERRED_IO		BIT(6)
+#define DEBUG_FBTFT_INIT_FUNCTIONS	BIT(7)
 
 /* fbops */
-#define DEBUG_FB_READ               (1<<8)
-#define DEBUG_FB_WRITE              (1<<9)
-#define DEBUG_FB_FILLRECT           (1<<10)
-#define DEBUG_FB_COPYAREA           (1<<11)
-#define DEBUG_FB_IMAGEBLIT          (1<<12)
-#define DEBUG_FB_SETCOLREG          (1<<13)
-#define DEBUG_FB_BLANK              (1<<14)
+#define DEBUG_FB_READ			BIT(8)
+#define DEBUG_FB_WRITE			BIT(9)
+#define DEBUG_FB_FILLRECT		BIT(10)
+#define DEBUG_FB_COPYAREA		BIT(11)
+#define DEBUG_FB_IMAGEBLIT		BIT(12)
+#define DEBUG_FB_SETCOLREG		BIT(13)
+#define DEBUG_FB_BLANK			BIT(14)
 
-#define DEBUG_SYSFS                 (1<<16)
+#define DEBUG_SYSFS			BIT(16)
 
 /* fbtftops */
-#define DEBUG_BACKLIGHT             (1<<17)
-#define DEBUG_READ                  (1<<18)
-#define DEBUG_WRITE                 (1<<19)
-#define DEBUG_WRITE_VMEM            (1<<20)
-#define DEBUG_WRITE_REGISTER        (1<<21)
-#define DEBUG_SET_ADDR_WIN          (1<<22)
-#define DEBUG_RESET                 (1<<23)
-#define DEBUG_MKDIRTY               (1<<24)
-#define DEBUG_UPDATE_DISPLAY        (1<<25)
-#define DEBUG_INIT_DISPLAY          (1<<26)
-#define DEBUG_BLANK                 (1<<27)
-#define DEBUG_REQUEST_GPIOS         (1<<28)
-#define DEBUG_FREE_GPIOS            (1<<29)
-#define DEBUG_REQUEST_GPIOS_MATCH   (1<<30)
-#define DEBUG_VERIFY_GPIOS          (1<<31)
+#define DEBUG_BACKLIGHT		BIT(17)
+#define DEBUG_READ			BIT(18)
+#define DEBUG_WRITE			BIT(19)
+#define DEBUG_WRITE_VMEM		BIT(20)
+#define DEBUG_WRITE_REGISTER		BIT(21)
+#define DEBUG_SET_ADDR_WIN		BIT(22)
+#define DEBUG_RESET			BIT(23)
+#define DEBUG_MKDIRTY			BIT(24)
+#define DEBUG_UPDATE_DISPLAY		BIT(25)
+#define DEBUG_INIT_DISPLAY		BIT(26)
+#define DEBUG_BLANK			BIT(27)
+#define DEBUG_REQUEST_GPIOS		BIT(28)
+#define DEBUG_FREE_GPIOS		BIT(29)
+#define DEBUG_REQUEST_GPIOS_MATCH	BIT(30)
+#define DEBUG_VERIFY_GPIOS		BIT(31)
 
 #define fbtft_init_dbg(dev, format, arg...)                  \
 do {                                                         \
-- 
2.18.0

[PATCH v3 3/3] staging: fbtft: Corrects long index line - Style

[Leonardo Brás]

Reduces the index size to keep the code more readable. 

Signed-off-by: Leonardo Brás <leobras.c@gmail.com>
---
 drivers/staging/fbtft/fbtft-sysfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/fbtft/fbtft-sysfs.c b/drivers/staging/fbtft/fbtft-sysfs.c
index 2a5c630dab87..404046d3999a 100644
--- a/drivers/staging/fbtft/fbtft-sysfs.c
+++ b/drivers/staging/fbtft/fbtft-sysfs.c
@@ -25,6 +25,7 @@ int fbtft_gamma_parse_str(struct fbtft_par *par, u32 *curves,
 	unsigned long val = 0;
 	int ret = 0;
 	int curve_counter, value_counter;
+	unsigned long idx;
 
 	fbtft_par_dbg(DEBUG_SYSFS, par, "%s() str=\n", __func__);
 
@@ -68,7 +69,9 @@ int fbtft_gamma_parse_str(struct fbtft_par *par, u32 *curves,
 			ret = get_next_ulong(&curve_p, &val, " ", 16);
 			if (ret)
 				goto out;
-			curves[curve_counter * par->gamma.num_values + value_counter] = val;
+			idx = curve_counter * par->gamma.num_values +
+			      value_counter;
+			curves[idx] = val;
 			value_counter++;
 		}
 		if (value_counter != par->gamma.num_values) {
-- 
2.18.0