drm/mgag200: Declare PLL clock constants static const

Move the PLL constants to the RO data section by declaring them as
static const. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-10-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 3ef8b9f7e455b4be2798306b011a6654c8272651..8c11a4c41ed53dc9366e92faa6fb77db04265b06 100644 (file)
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -209,17 +209,16 @@ static void mgag200_set_pixpll_g200(struct mga_device *mdev,
 static int mgag200_compute_pixpll_values_g200se_00(struct mga_device *mdev, long clock,
                                                   struct mgag200_pll_values *pixpllc)
 {
-       unsigned int vcomax, vcomin, pllreffreq;
+       static const unsigned int vcomax = 320000;
+       static const unsigned int vcomin = 160000;
+       static const unsigned int pllreffreq = 25000;
+
        unsigned int delta, tmpdelta, permitteddelta;
        unsigned int testp, testm, testn;
        unsigned int p, m, n, s;
        unsigned int computed;
 
        m = n = p = s = 0;
-
-       vcomax = 320000;
-       vcomin = 160000;
-       pllreffreq = 25000;
        permitteddelta = clock * 5 / 1000;
 
        for (testp = 8; testp > 0; testp /= 2) {
@@ -261,9 +260,11 @@ static int mgag200_compute_pixpll_values_g200se_00(struct mga_device *mdev, long
 static int mgag200_compute_pixpll_values_g200se_04(struct mga_device *mdev, long clock,
                                                   struct mgag200_pll_values *pixpllc)
 {
+       static const unsigned int vcomax = 1600000;
+       static const unsigned int vcomin = 800000;
+       static const unsigned int pllreffreq = 25000;
        static const unsigned int pvalues_e4[] = {16, 14, 12, 10, 8, 6, 4, 2, 1};
 
-       unsigned int vcomax, vcomin, pllreffreq;
        unsigned int delta, tmpdelta, permitteddelta;
        unsigned int testp, testm, testn;
        unsigned int p, m, n, s;
@@ -274,10 +275,6 @@ static int mgag200_compute_pixpll_values_g200se_04(struct mga_device *mdev, long
        m = n = p = s = 0;
        delta = 0xffffffff;
 
-       vcomax        = 1600000;
-       vcomin        = 800000;
-       pllreffreq    = 25000;
-
        if (clock < 25000)
                clock = 25000;
        clock = clock * 2;
@@ -373,7 +370,10 @@ static void mgag200_set_pixpll_g200se(struct mga_device *mdev,
 static int mgag200_compute_pixpll_values_g200wb(struct mga_device *mdev, long clock,
                                                struct mgag200_pll_values *pixpllc)
 {
-       unsigned int vcomax, vcomin, pllreffreq;
+       static const unsigned int vcomax = 550000;
+       static const unsigned int vcomin = 150000;
+       static const unsigned int pllreffreq = 48000;
+
        unsigned int delta, tmpdelta;
        unsigned int testp, testm, testn;
        unsigned int p, m, n, s;
@@ -383,10 +383,6 @@ static int mgag200_compute_pixpll_values_g200wb(struct mga_device *mdev, long cl
 
        delta = 0xffffffff;
 
-       vcomax = 550000;
-       vcomin = 150000;
-       pllreffreq = 48000;
-
        for (testp = 1; testp < 9; testp++) {
                if (clock * testp > vcomax)
                        continue;
@@ -538,17 +534,16 @@ static void mgag200_set_pixpll_g200wb(struct mga_device *mdev,
 static int mgag200_compute_pixpll_values_g200ev(struct mga_device *mdev, long clock,
                                                struct mgag200_pll_values *pixpllc)
 {
-       unsigned int vcomax, vcomin, pllreffreq;
+       static const unsigned int vcomax = 550000;
+       static const unsigned int vcomin = 150000;
+       static const unsigned int pllreffreq = 50000;
+
        unsigned int delta, tmpdelta;
        unsigned int testp, testm, testn;
        unsigned int p, m, n, s;
        unsigned int computed;
 
        m = n = p = s = 0;
-       vcomax = 550000;
-       vcomin = 150000;
-       pllreffreq = 50000;
-
        delta = 0xffffffff;
 
        for (testp = 16; testp > 0; testp--) {
@@ -654,18 +649,16 @@ static void mgag200_set_pixpll_g200ev(struct mga_device *mdev,
 static int mgag200_compute_pixpll_values_g200eh(struct mga_device *mdev, long clock,
                                                struct mgag200_pll_values *pixpllc)
 {
-       unsigned int vcomax, vcomin, pllreffreq;
+       static const unsigned int vcomax = 800000;
+       static const unsigned int vcomin = 400000;
+       static const unsigned int pllreffreq = 33333;
+
        unsigned int delta, tmpdelta;
        unsigned int testp, testm, testn;
        unsigned int p, m, n, s;
        unsigned int computed;
 
        m = n = p = s = 0;
-
-       vcomax = 800000;
-       vcomin = 400000;
-       pllreffreq = 33333;
-
        delta = 0xffffffff;
 
        for (testp = 16; testp > 0; testp >>= 1) {
@@ -770,20 +763,17 @@ static void mgag200_set_pixpll_g200eh(struct mga_device *mdev,
 static int mgag200_compute_pixpll_values_g200eh3(struct mga_device *mdev, long clock,
                                                 struct mgag200_pll_values *pixpllc)
 {
-       unsigned int vcomax, vcomin, pllreffreq;
+       static const unsigned int vcomax = 3000000;
+       static const unsigned int vcomin = 1500000;
+       static const unsigned int pllreffreq = 25000;
+
        unsigned int delta, tmpdelta;
        unsigned int testp, testm, testn;
        unsigned int p, m, n, s;
        unsigned int computed;
 
        m = n = p = s = 0;
-
-       vcomax = 3000000;
-       vcomin = 1500000;
-       pllreffreq = 25000;
-
        delta = 0xffffffff;
-
        testp = 0;
 
        for (testm = 150; testm >= 6; testm--) {
@@ -821,18 +811,17 @@ static int mgag200_compute_pixpll_values_g200eh3(struct mga_device *mdev, long c
 static int mgag200_compute_pixpll_values_g200er(struct mga_device *mdev, long clock,
                                                struct mgag200_pll_values *pixpllc)
 {
+       static const unsigned int vcomax = 1488000;
+       static const unsigned int vcomin = 1056000;
+       static const unsigned int pllreffreq = 48000;
        static const unsigned int m_div_val[] = { 1, 2, 4, 8 };
-       unsigned int vcomax, vcomin, pllreffreq;
+
        unsigned int delta, tmpdelta;
        int testr, testn, testm, testo;
        unsigned int p, m, n, s;
        unsigned int computed, vco;
 
        m = n = p = s = 0;
-       vcomax = 1488000;
-       vcomin = 1056000;
-       pllreffreq = 48000;
-
        delta = 0xffffffff;
 
        for (testr = 0; testr < 4; testr++) {
@@ -925,20 +914,18 @@ static void mgag200_set_pixpll_g200er(struct mga_device *mdev,
 static int mgag200_compute_pixpll_values_g200ew3(struct mga_device *mdev, long clock,
                                                 struct mgag200_pll_values *pixpllc)
 {
-       unsigned int vcomax, vcomin, pllreffreq;
+       static const unsigned int vcomax = 800000;
+       static const unsigned int vcomin = 400000;
+       static const unsigned int pllreffreq = 25000;
+
        unsigned int delta, tmpdelta;
        unsigned int testp, testm, testn, testp2;
        unsigned int p, m, n, s;
        unsigned int computed;
 
        m = n = p = s = 0;
-
        delta = 0xffffffff;
 
-       vcomax = 800000;
-       vcomin = 400000;
-       pllreffreq = 25000;
-
        for (testp = 1; testp < 8; testp++) {
                for (testp2 = 1; testp2 < 8; testp2++) {
                        if (testp < testp2)