From: Mike Rapoport <mike.rapoport@gmail.com>
Date: Wed, 30 Sep 2015 05:24:55 +0000 (+0300)
Subject: staging: sm750fb: remove unused calcPllValue2 function
X-Git-Tag: firefly_0821_release~176^2~802^2~1367
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=55a6cf5d4b211a8d1c13264ab1ed5fc7e09fdfdd;p=firefly-linux-kernel-4.4.55.git

staging: sm750fb: remove unused calcPllValue2 function

The calcPllValue2 function is never called and therefore it can be
removed.

Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/sm750fb/ddk750_chip.c b/drivers/staging/sm750fb/ddk750_chip.c
index d13574906dda..e987971cce28 100644
--- a/drivers/staging/sm750fb/ddk750_chip.c
+++ b/drivers/staging/sm750fb/ddk750_chip.c
@@ -430,106 +430,6 @@ unsigned int calcPllValue(unsigned int request_orig, pll_value_t *pll)
 	return ret;
 }
 
-unsigned int calcPllValue2(
-unsigned int ulRequestClk, /* Required pixel clock in Hz unit */
-pll_value_t *pPLL           /* Structure to hold the value to be set in PLL */
-)
-{
-	unsigned int M, N, OD, POD = 0, diff, pllClk, odPower, podPower;
-	unsigned int bestDiff = 0xffffffff; /* biggest 32 bit unsigned number */
-	unsigned int ret;
-    /* Init PLL structure to know states */
-	pPLL->M = 0;
-	pPLL->N = 0;
-	pPLL->OD = 0;
-	pPLL->POD = 0;
-
-    /* Sanity check: None at the moment */
-
-    /* Convert everything in Khz range in order to avoid calculation overflow */
-	pPLL->inputFreq /= 1000;
-	ulRequestClk /= 1000;
-
-#ifndef VALIDATION_CHIP
-    /* The maximum of post divider is 8. */
-	for (POD = 0; POD <= 3; POD++)
-#endif
-		{
-
-#ifndef VALIDATION_CHIP
-	/* MXCLK_PLL does not have post divider. */
-	if ((POD > 0) && (pPLL->clockType == MXCLK_PLL))
-		break;
-#endif
-
-	/* Work out 2 to the power of POD */
-	podPower = 1 << POD;
-
-	/* OD has only 2 bits [15:14] and its value must between 0 to 3 */
-	for (OD = 0; OD <= 3; OD++) {
-		/* Work out 2 to the power of OD */
-		odPower = 1 << OD;
-
-#ifdef VALIDATION_CHIP
-	if (odPower > 4)
-		podPower = 4;
-	else
-		podPower = odPower;
-#endif
-
-		/* N has 4 bits [11:8] and its value must between 2 and 15.
-		The N == 1 will behave differently --> Result is not correct. */
-	for (N = 2; N <= 15; N++) {
-		/* The formula for PLL is ulRequestClk = inputFreq * M / N / (2^OD)
-		In the following steps, we try to work out a best M value given the others are known.
-		To avoid decimal calculation, we use 1000 as multiplier for up to 3 decimal places of accuracy.
-		*/
-		M = ulRequestClk * N * odPower * 1000 / pPLL->inputFreq;
-		M = roundedDiv(M, 1000);
-
-		/* M field has only 8 bits, reject value bigger than 8 bits */
-		if (M < 256) {
-			/* Calculate the actual clock for a given M & N */
-			pllClk = pPLL->inputFreq * M / N / odPower / podPower;
-
-			/* How much are we different from the requirement */
-			diff = absDiff(pllClk, ulRequestClk);
-
-			if (diff < bestDiff) {
-				bestDiff = diff;
-
-				/* Store M and N values */
-				pPLL->M  = M;
-				pPLL->N  = N;
-				pPLL->OD = OD;
-
-#ifdef VALIDATION_CHIP
-			if (OD > 2)
-				POD = 2;
-			else
-				POD = OD;
-#endif
-
-			pPLL->POD = POD;
-			}
-		}
-	}
-	}
-	}
-
-    /* Restore input frequency from Khz to hz unit */
-	ulRequestClk *= 1000;
-	pPLL->inputFreq = DEFAULT_INPUT_CLOCK; /* Default reference clock */
-
-    /* Return actual frequency that the PLL can set */
-	ret = calcPLL(pPLL);
-	return ret;
-}
-
-
-
-
-
 unsigned int formatPllReg(pll_value_t *pPLL)
 {
 	unsigned int ulPllReg = 0;
diff --git a/drivers/staging/sm750fb/ddk750_chip.h b/drivers/staging/sm750fb/ddk750_chip.h
index d130bb8fef1f..6e87a1792c8b 100644
--- a/drivers/staging/sm750fb/ddk750_chip.h
+++ b/drivers/staging/sm750fb/ddk750_chip.h
@@ -73,7 +73,6 @@ initchip_param_t;
 
 logical_chip_type_t getChipType(void);
 unsigned int calcPllValue(unsigned int request, pll_value_t *pll);
-unsigned int calcPllValue2(unsigned int, pll_value_t *);
 unsigned int formatPllReg(pll_value_t *pPLL);
 void ddk750_set_mmio(void __iomem *, unsigned short, char);
 unsigned int ddk750_getVMSize(void);