20 #include "sdhci-pltfm.h"
27 static void sdhci_cns3xxx_set_clock(struct sdhci_host *host, unsigned int clock)  in sdhci_cns3xxx_set_clock()  argument
29 	struct device *dev = mmc_dev(host->mmc);  in sdhci_cns3xxx_set_clock()
30 	int div = 1;  in sdhci_cns3xxx_set_clock()  local
34 	if (clock == host->clock)  in sdhci_cns3xxx_set_clock()
39 	if (clock == 0)  in sdhci_cns3xxx_set_clock()
42 	while (host->max_clk / div > clock) {  in sdhci_cns3xxx_set_clock()
47 		if (div < 4)  in sdhci_cns3xxx_set_clock()
48 			div += 1;  in sdhci_cns3xxx_set_clock()
49 		else if (div < 256)  in sdhci_cns3xxx_set_clock()
50 			div *= 2;  in sdhci_cns3xxx_set_clock()
55 	dev_dbg(dev, "desired SD clock: %d, actual: %d\n",  in sdhci_cns3xxx_set_clock()
56 		clock, host->max_clk / div);  in sdhci_cns3xxx_set_clock()
59 	if (div != 3)  in sdhci_cns3xxx_set_clock()
60 		div >>= 1;  in sdhci_cns3xxx_set_clock()
62 	clk = div << SDHCI_DIVIDER_SHIFT;  in sdhci_cns3xxx_set_clock()
70 			dev_warn(dev, "clock is unstable");  in sdhci_cns3xxx_set_clock()
73 		timeout--;  in sdhci_cns3xxx_set_clock()
80 	host->clock = clock;  in sdhci_cns3xxx_set_clock()
110 		.name	= "sdhci-cns3xxx",