From 8f7e91a31fb95c50880c76505b416630c0326d93 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 22 Oct 2012 11:40:57 -0300 Subject: [PATCH] [media] smiapp-pll: Constify limits argument to smiapp_pll_calculate() The limits are input parameters and should not be modified by the smiapp_pll_calculate() function. Make them const. Signed-off-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/smiapp-pll.c | 35 +++++++++++++++++----------------- drivers/media/i2c/smiapp-pll.h | 3 ++- 2 files changed, 19 insertions(+), 19 deletions(-) diff --git a/drivers/media/i2c/smiapp-pll.c b/drivers/media/i2c/smiapp-pll.c index cbef446180f8..61e2401c1b35 100644 --- a/drivers/media/i2c/smiapp-pll.c +++ b/drivers/media/i2c/smiapp-pll.c @@ -88,7 +88,7 @@ static void print_pll(struct device *dev, struct smiapp_pll *pll) } static int __smiapp_pll_calculate(struct device *dev, - struct smiapp_pll_limits *limits, + const struct smiapp_pll_limits *limits, struct smiapp_pll *pll, uint32_t mul, uint32_t div, uint32_t lane_op_clock_ratio) { @@ -306,14 +306,10 @@ static int __smiapp_pll_calculate(struct device *dev, pll->pixel_rate_csi = pll->op_pix_clk_freq_hz * lane_op_clock_ratio; - rval = bounds_check(dev, pll->pre_pll_clk_div, - limits->min_pre_pll_clk_div, - limits->max_pre_pll_clk_div, "pre_pll_clk_div"); - if (!rval) - rval = bounds_check( - dev, pll->pll_ip_clk_freq_hz, - limits->min_pll_ip_freq_hz, limits->max_pll_ip_freq_hz, - "pll_ip_clk_freq_hz"); + rval = bounds_check(dev, pll->pll_ip_clk_freq_hz, + limits->min_pll_ip_freq_hz, + limits->max_pll_ip_freq_hz, + "pll_ip_clk_freq_hz"); if (!rval) rval = bounds_check( dev, pll->pll_multiplier, @@ -362,9 +358,12 @@ static int __smiapp_pll_calculate(struct device *dev, return rval; } -int smiapp_pll_calculate(struct device *dev, struct smiapp_pll_limits *limits, +int smiapp_pll_calculate(struct device *dev, + const struct smiapp_pll_limits *limits, struct smiapp_pll *pll) { + uint16_t min_pre_pll_clk_div; + uint16_t max_pre_pll_clk_div; uint32_t lane_op_clock_ratio; uint32_t mul, div; unsigned int i; @@ -397,33 +396,33 @@ int smiapp_pll_calculate(struct device *dev, struct smiapp_pll_limits *limits, /* Figure out limits for pre-pll divider based on extclk */ dev_dbg(dev, "min / max pre_pll_clk_div: %d / %d\n", limits->min_pre_pll_clk_div, limits->max_pre_pll_clk_div); - limits->max_pre_pll_clk_div = + max_pre_pll_clk_div = min_t(uint16_t, limits->max_pre_pll_clk_div, clk_div_even(pll->ext_clk_freq_hz / limits->min_pll_ip_freq_hz)); - limits->min_pre_pll_clk_div = + min_pre_pll_clk_div = max_t(uint16_t, limits->min_pre_pll_clk_div, clk_div_even_up( DIV_ROUND_UP(pll->ext_clk_freq_hz, limits->max_pll_ip_freq_hz))); dev_dbg(dev, "pre-pll check: min / max pre_pll_clk_div: %d / %d\n", - limits->min_pre_pll_clk_div, limits->max_pre_pll_clk_div); + min_pre_pll_clk_div, max_pre_pll_clk_div); i = gcd(pll->pll_op_clk_freq_hz, pll->ext_clk_freq_hz); mul = div_u64(pll->pll_op_clk_freq_hz, i); div = pll->ext_clk_freq_hz / i; dev_dbg(dev, "mul %d / div %d\n", mul, div); - limits->min_pre_pll_clk_div = - max_t(uint16_t, limits->min_pre_pll_clk_div, + min_pre_pll_clk_div = + max_t(uint16_t, min_pre_pll_clk_div, clk_div_even_up( DIV_ROUND_UP(mul * pll->ext_clk_freq_hz, limits->max_pll_op_freq_hz))); dev_dbg(dev, "pll_op check: min / max pre_pll_clk_div: %d / %d\n", - limits->min_pre_pll_clk_div, limits->max_pre_pll_clk_div); + min_pre_pll_clk_div, max_pre_pll_clk_div); - for (pll->pre_pll_clk_div = limits->min_pre_pll_clk_div; - pll->pre_pll_clk_div <= limits->max_pre_pll_clk_div; + for (pll->pre_pll_clk_div = min_pre_pll_clk_div; + pll->pre_pll_clk_div <= max_pre_pll_clk_div; pll->pre_pll_clk_div += 2 - (pll->pre_pll_clk_div & 1)) { rval = __smiapp_pll_calculate(dev, limits, pll, mul, div, lane_op_clock_ratio); diff --git a/drivers/media/i2c/smiapp-pll.h b/drivers/media/i2c/smiapp-pll.h index 8500e6e562bb..9491a41fcce7 100644 --- a/drivers/media/i2c/smiapp-pll.h +++ b/drivers/media/i2c/smiapp-pll.h @@ -107,7 +107,8 @@ struct smiapp_pll_limits { struct device; -int smiapp_pll_calculate(struct device *dev, struct smiapp_pll_limits *limits, +int smiapp_pll_calculate(struct device *dev, + const struct smiapp_pll_limits *limits, struct smiapp_pll *pll); #endif /* SMIAPP_PLL_H */ -- 2.30.2