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mxs: Add MX23 quirks into the clock code 

The MX23 has different handling of the SSP clock and GPMI NAND clock sources,
add necessary quirks into the clock code to properly handle these.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
utp
Otavio Salvador 2013-01-19 16:02:49 +00:00 committed by Stefano Babic
parent 4750953ed9
commit 0023997709
2 changed files with 32 additions and 11 deletions
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35
arch/arm/cpu/arm926ejs/mxs/clock.c
View File

@ -1,5 +1,5 @@
/*
* Freescale i.MX28 clock setup code
* Freescale i.MX23/i.MX28 clock setup code
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
@ -32,15 +32,24 @@
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
/* The PLL frequency is always 480MHz, see section 10.2 in iMX28 datasheet. */
/*
* The PLL frequency is 480MHz and XTAL frequency is 24MHz
* iMX23: datasheet section 4.2
* iMX28: datasheet section 10.2
*/
#define PLL_FREQ_KHZ 480000
#define PLL_FREQ_COEF 18
/* The XTAL frequency is always 24MHz, see section 10.2 in iMX28 datasheet. */
#define XTAL_FREQ_KHZ 24000
#define PLL_FREQ_MHZ (PLL_FREQ_KHZ / 1000)
#define XTAL_FREQ_MHZ (XTAL_FREQ_KHZ / 1000)
#if defined(CONFIG_MX23)
#define MXC_SSPCLK_MAX MXC_SSPCLK0
#elif defined(CONFIG_MX28)
#define MXC_SSPCLK_MAX MXC_SSPCLK3
#endif
static uint32_t mxs_get_pclk(void)
{
struct mxs_clkctrl_regs *clkctrl_regs =
@ -120,7 +129,13 @@ static uint32_t mxs_get_gpmiclk(void)
{
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
#if defined(CONFIG_MX23)
uint8_t *reg =
&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_CPU];
#elif defined(CONFIG_MX28)
uint8_t *reg =
&clkctrl_regs->hw_clkctrl_frac1[CLKCTRL_FRAC1_GPMI];
#endif
uint32_t clkctrl, clkseq, div;
uint8_t clkfrac, frac;
@ -134,7 +149,7 @@ static uint32_t mxs_get_gpmiclk(void)
}
/* REF Path */
clkfrac = readb(&clkctrl_regs->hw_clkctrl_frac1[CLKCTRL_FRAC1_GPMI]);
clkfrac = readb(reg);
frac = clkfrac & CLKCTRL_FRAC_FRAC_MASK;
div = clkctrl & CLKCTRL_GPMI_DIV_MASK;
return (PLL_FREQ_MHZ * PLL_FREQ_COEF / frac) / div;
@ -203,7 +218,7 @@ void mxs_set_sspclk(enum mxs_sspclock ssp, uint32_t freq, int xtal)
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
uint32_t clk, clkreg;
if (ssp > MXC_SSPCLK3)
if (ssp > MXC_SSPCLK_MAX)
return;
clkreg = (uint32_t)(&clkctrl_regs->hw_clkctrl_ssp0) +
@ -248,7 +263,7 @@ static uint32_t mxs_get_sspclk(enum mxs_sspclock ssp)
uint32_t clkreg;
uint32_t clk, tmp;
if (ssp > MXC_SSPCLK3)
if (ssp > MXC_SSPCLK_MAX)
return 0;
tmp = readl(&clkctrl_regs->hw_clkctrl_clkseq);
@ -325,16 +340,18 @@ uint32_t mxc_get_clock(enum mxc_clock clk)
return mxs_get_ioclk(MXC_IOCLK0);
case MXC_IO1_CLK:
return mxs_get_ioclk(MXC_IOCLK1);
case MXC_XTAL_CLK:
return XTAL_FREQ_KHZ * 1000;
case MXC_SSP0_CLK:
return mxs_get_sspclk(MXC_SSPCLK0);
#ifdef CONFIG_MX28
case MXC_SSP1_CLK:
return mxs_get_sspclk(MXC_SSPCLK1);
case MXC_SSP2_CLK:
return mxs_get_sspclk(MXC_SSPCLK2);
case MXC_SSP3_CLK:
return mxs_get_sspclk(MXC_SSPCLK3);
case MXC_XTAL_CLK:
return XTAL_FREQ_KHZ * 1000;
#endif
}
return 0;

8
arch/arm/include/asm/arch-mxs/clock.h
View File

@ -1,5 +1,5 @@
/*
* Freescale i.MX28 Clock
* Freescale i.MX23/i.MX28 Clock
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
@ -31,11 +31,13 @@ enum mxc_clock {
MXC_GPMI_CLK,
MXC_IO0_CLK,
MXC_IO1_CLK,
MXC_XTAL_CLK,
MXC_SSP0_CLK,
#ifdef CONFIG_MX28
MXC_SSP1_CLK,
MXC_SSP2_CLK,
MXC_SSP3_CLK,
MXC_XTAL_CLK,
#endif
};
enum mxs_ioclock {
@ -45,9 +47,11 @@ enum mxs_ioclock {
enum mxs_sspclock {
MXC_SSPCLK0 = 0,
#ifdef CONFIG_MX28
MXC_SSPCLK1,
MXC_SSPCLK2,
MXC_SSPCLK3,
#endif
};
uint32_t mxc_get_clock(enum mxc_clock clk);