diff mbox series

mtd: rawnand: stm32_fmc2: avoid warnings when building with W=1 option

Message ID 1561128189-14411-1-git-send-email-christophe.kerello@st.com
State Accepted
Delegated to: Miquel Raynal
Headers show
Series mtd: rawnand: stm32_fmc2: avoid warnings when building with W=1 option | expand

Commit Message

Christophe Kerello June 21, 2019, 2:43 p.m. UTC 
This patch solves warnings detected by setting W=1 when building.

Warnings type detected:
drivers/mtd/nand/raw/stm32_fmc2_nand.c: In function ‘stm32_fmc2_calc_timings’:
drivers/mtd/nand/raw/stm32_fmc2_nand.c:1417:23: warning: comparison is
always false due to limited range of data type [-Wtype-limits]
  else if (tims->twait > FMC2_PMEM_PATT_TIMING_MASK)

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
---
 drivers/mtd/nand/raw/stm32_fmc2_nand.c | 90 +++++++++++-----------------------
 1 file changed, 29 insertions(+), 61 deletions(-)

Comments

Miquel Raynal July 1, 2019, 7:11 a.m. UTC | #1 
Hi Christophe,

Christophe Kerello <christophe.kerello@st.com> wrote on Fri, 21 Jun
2019 16:43:09 +0200:

> This patch solves warnings detected by setting W=1 when building.
> 
> Warnings type detected:
> drivers/mtd/nand/raw/stm32_fmc2_nand.c: In function ‘stm32_fmc2_calc_timings’:
> drivers/mtd/nand/raw/stm32_fmc2_nand.c:1417:23: warning: comparison is
> always false due to limited range of data type [-Wtype-limits]
>   else if (tims->twait > FMC2_PMEM_PATT_TIMING_MASK)
> 
> Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
> ---

Applied to nand/next, thanks.

Miquèl
Christophe Kerello July 9, 2019, 7:50 a.m. UTC | #2 
On 7/1/19 9:11 AM, Miquel Raynal wrote:
> Hi Christophe,
> 
> Christophe Kerello <christophe.kerello@st.com> wrote on Fri, 21 Jun
> 2019 16:43:09 +0200:
> 
>> This patch solves warnings detected by setting W=1 when building.
>>
>> Warnings type detected:
>> drivers/mtd/nand/raw/stm32_fmc2_nand.c: In function ‘stm32_fmc2_calc_timings’:
>> drivers/mtd/nand/raw/stm32_fmc2_nand.c:1417:23: warning: comparison is
>> always false due to limited range of data type [-Wtype-limits]
>>    else if (tims->twait > FMC2_PMEM_PATT_TIMING_MASK)
>>
>> Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
>> ---
> 
> Applied to nand/next, thanks.

Hi Miquel,

After fetching nand/next, I do not see this patch applied.

Regards,
Christophe Kerello.

> 
> Miquèl
>
Miquel Raynal July 9, 2019, 7:59 a.m. UTC | #3 
Hi Christophe,

Christophe Kerello <christophe.kerello@st.com> wrote on Tue, 9 Jul 2019
09:50:10 +0200:

> On 7/1/19 9:11 AM, Miquel Raynal wrote:
> > Hi Christophe,
> > 
> > Christophe Kerello <christophe.kerello@st.com> wrote on Fri, 21 Jun
> > 2019 16:43:09 +0200:
> >   
> >> This patch solves warnings detected by setting W=1 when building.
> >>
> >> Warnings type detected:
> >> drivers/mtd/nand/raw/stm32_fmc2_nand.c: In function ‘stm32_fmc2_calc_timings’:
> >> drivers/mtd/nand/raw/stm32_fmc2_nand.c:1417:23: warning: comparison is
> >> always false due to limited range of data type [-Wtype-limits]
> >>    else if (tims->twait > FMC2_PMEM_PATT_TIMING_MASK)
> >>
> >> Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
> >> ---  
> > 
> > Applied to nand/next, thanks.  
> 
> Hi Miquel,
> 
> After fetching nand/next, I do not see this patch applied.
> 

Not sure what happened, please resend with a Fixes/stable tag added,
I'll apply when -rc1 will be out.

Sorry again for the trouble, thanks for the notice!
Miquèl
diff mbox series

Patch

diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index 4aabea2..ed6e7e2 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -1424,21 +1424,16 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	struct stm32_fmc2_timings *tims = &nand->timings;
 	unsigned long hclk = clk_get_rate(fmc2->clk);
 	unsigned long hclkp = NSEC_PER_SEC / (hclk / 1000);
-	int tar, tclr, thiz, twait, tset_mem, tset_att, thold_mem, thold_att;
-
-	tar = hclkp;
-	if (tar < sdrt->tAR_min)
-		tar = sdrt->tAR_min;
-	tims->tar = DIV_ROUND_UP(tar, hclkp) - 1;
-	if (tims->tar > FMC2_PCR_TIMING_MASK)
-		tims->tar = FMC2_PCR_TIMING_MASK;
-
-	tclr = hclkp;
-	if (tclr < sdrt->tCLR_min)
-		tclr = sdrt->tCLR_min;
-	tims->tclr = DIV_ROUND_UP(tclr, hclkp) - 1;
-	if (tims->tclr > FMC2_PCR_TIMING_MASK)
-		tims->tclr = FMC2_PCR_TIMING_MASK;
+	unsigned long timing, tar, tclr, thiz, twait;
+	unsigned long tset_mem, tset_att, thold_mem, thold_att;
+
+	tar = max_t(unsigned long, hclkp, sdrt->tAR_min);
+	timing = DIV_ROUND_UP(tar, hclkp) - 1;
+	tims->tar = min_t(unsigned long, timing, FMC2_PCR_TIMING_MASK);
+
+	tclr = max_t(unsigned long, hclkp, sdrt->tCLR_min);
+	timing = DIV_ROUND_UP(tclr, hclkp) - 1;
+	tims->tclr = min_t(unsigned long, timing, FMC2_PCR_TIMING_MASK);
 
 	tims->thiz = FMC2_THIZ;
 	thiz = (tims->thiz + 1) * hclkp;
@@ -1448,18 +1443,11 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	 * tWAIT > tWP
 	 * tWAIT > tREA + tIO
 	 */
-	twait = hclkp;
-	if (twait < sdrt->tRP_min)
-		twait = sdrt->tRP_min;
-	if (twait < sdrt->tWP_min)
-		twait = sdrt->tWP_min;
-	if (twait < sdrt->tREA_max + FMC2_TIO)
-		twait = sdrt->tREA_max + FMC2_TIO;
-	tims->twait = DIV_ROUND_UP(twait, hclkp);
-	if (tims->twait == 0)
-		tims->twait = 1;
-	else if (tims->twait > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->twait = FMC2_PMEM_PATT_TIMING_MASK;
+	twait = max_t(unsigned long, hclkp, sdrt->tRP_min);
+	twait = max_t(unsigned long, twait, sdrt->tWP_min);
+	twait = max_t(unsigned long, twait, sdrt->tREA_max + FMC2_TIO);
+	timing = DIV_ROUND_UP(twait, hclkp);
+	tims->twait = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tSETUP_MEM > tCS - tWAIT
@@ -1474,20 +1462,15 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if (twait > thiz && (sdrt->tDS_min > twait - thiz) &&
 	    (tset_mem < sdrt->tDS_min - (twait - thiz)))
 		tset_mem = sdrt->tDS_min - (twait - thiz);
-	tims->tset_mem = DIV_ROUND_UP(tset_mem, hclkp);
-	if (tims->tset_mem == 0)
-		tims->tset_mem = 1;
-	else if (tims->tset_mem > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->tset_mem = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(tset_mem, hclkp);
+	tims->tset_mem = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tHOLD_MEM > tCH
 	 * tHOLD_MEM > tREH - tSETUP_MEM
 	 * tHOLD_MEM > max(tRC, tWC) - (tSETUP_MEM + tWAIT)
 	 */
-	thold_mem = hclkp;
-	if (thold_mem < sdrt->tCH_min)
-		thold_mem = sdrt->tCH_min;
+	thold_mem = max_t(unsigned long, hclkp, sdrt->tCH_min);
 	if (sdrt->tREH_min > tset_mem &&
 	    (thold_mem < sdrt->tREH_min - tset_mem))
 		thold_mem = sdrt->tREH_min - tset_mem;
@@ -1497,11 +1480,8 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if ((sdrt->tWC_min > tset_mem + twait) &&
 	    (thold_mem < sdrt->tWC_min - (tset_mem + twait)))
 		thold_mem = sdrt->tWC_min - (tset_mem + twait);
-	tims->thold_mem = DIV_ROUND_UP(thold_mem, hclkp);
-	if (tims->thold_mem == 0)
-		tims->thold_mem = 1;
-	else if (tims->thold_mem > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->thold_mem = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(thold_mem, hclkp);
+	tims->thold_mem = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tSETUP_ATT > tCS - tWAIT
@@ -1523,11 +1503,8 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if (twait > thiz && (sdrt->tDS_min > twait - thiz) &&
 	    (tset_att < sdrt->tDS_min - (twait - thiz)))
 		tset_att = sdrt->tDS_min - (twait - thiz);
-	tims->tset_att = DIV_ROUND_UP(tset_att, hclkp);
-	if (tims->tset_att == 0)
-		tims->tset_att = 1;
-	else if (tims->tset_att > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->tset_att = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(tset_att, hclkp);
+	tims->tset_att = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tHOLD_ATT > tALH
@@ -1542,17 +1519,11 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	 * tHOLD_ATT > tRC - (tSETUP_ATT + tWAIT)
 	 * tHOLD_ATT > tWC - (tSETUP_ATT + tWAIT)
 	 */
-	thold_att = hclkp;
-	if (thold_att < sdrt->tALH_min)
-		thold_att = sdrt->tALH_min;
-	if (thold_att < sdrt->tCH_min)
-		thold_att = sdrt->tCH_min;
-	if (thold_att < sdrt->tCLH_min)
-		thold_att = sdrt->tCLH_min;
-	if (thold_att < sdrt->tCOH_min)
-		thold_att = sdrt->tCOH_min;
-	if (thold_att < sdrt->tDH_min)
-		thold_att = sdrt->tDH_min;
+	thold_att = max_t(unsigned long, hclkp, sdrt->tALH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tCH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tCLH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tCOH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tDH_min);
 	if ((sdrt->tWB_max + FMC2_TIO + FMC2_TSYNC > tset_mem) &&
 	    (thold_att < sdrt->tWB_max + FMC2_TIO + FMC2_TSYNC - tset_mem))
 		thold_att = sdrt->tWB_max + FMC2_TIO + FMC2_TSYNC - tset_mem;
@@ -1571,11 +1542,8 @@  static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if ((sdrt->tWC_min > tset_att + twait) &&
 	    (thold_att < sdrt->tWC_min - (tset_att + twait)))
 		thold_att = sdrt->tWC_min - (tset_att + twait);
-	tims->thold_att = DIV_ROUND_UP(thold_att, hclkp);
-	if (tims->thold_att == 0)
-		tims->thold_att = 1;
-	else if (tims->thold_att > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->thold_att = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(thold_att, hclkp);
+	tims->thold_att = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 }
 
 static int stm32_fmc2_setup_interface(struct nand_chip *chip, int chipnr,