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/*
* Copyright 2004-2012 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file sensor_clock.c
*
* @brief camera clock function
*
* @ingroup Camera
*/
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/clk.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
/*
* set_mclk_rate
*
* @param p_mclk_freq mclk frequence
* @param csi csi 0 or csi 1
*
*/
void set_mclk_rate(uint32_t *p_mclk_freq, uint32_t csi)
{
struct clk *clk;
uint32_t freq = 0;
char *mclk;
if (cpu_is_mx53()) {
if (csi == 0)
mclk = "ssi_ext1_clk";
else {
pr_err("invalid csi num %d\n", csi);
return;
}
} else if (cpu_is_mx6q() || cpu_is_mx6dl()) {
if (csi == 0) {
if (machine_is_mx6q_sabrelite())
mclk = "clko2_clk";
else
mclk = "clko_clk";
} else {
pr_err("invalid csi num %d\n", csi);
return;
};
} else if (cpu_is_mx25() || cpu_is_mx6sl()) { /* only has CSI0 */
mclk = "csi_clk";
} else {
if (csi == 0) {
mclk = "csi_mclk1";
} else if (csi == 1) {
mclk = "csi_mclk2";
} else {
pr_err("invalid csi num %d\n", csi);
return;
}
}
clk = clk_get(NULL, mclk);
freq = clk_round_rate(clk, *p_mclk_freq);
clk_set_rate(clk, freq);
*p_mclk_freq = freq;
clk_put(clk);
pr_debug("%s frequency = %d\n", mclk, *p_mclk_freq);
}
/* Exported symbols for modules. */
EXPORT_SYMBOL(set_mclk_rate);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Camera Sensor clock");
MODULE_LICENSE("GPL");
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