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Merge branch 'features/imx3' of git://git.pengutronix.de/git/imx/linux-2.6 into next/soc

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* 'features/imx3' of git://git.pengutronix.de/git/imx/linux-2.6:
  ARM: mx3: Setup AIPS registers
  ARM: mx3: Let mx31 and mx35 enter in LPM mode in WFI

Conflicts:
	arch/arm/mach-imx/mm-imx3.c
This commit is contained in:
Arnd Bergmann 2012-03-02 15:04:47 +00:00
commit cb66bb1d6f
6 changed files with 78 additions and 2 deletions
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4
arch/arm/mach-imx/Makefile
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@ -8,8 +8,8 @@ obj-$(CONFIG_SOC_IMX25) += clock-imx25.o mm-imx25.o ehci-imx25.o cpu-imx25.o
obj-$(CONFIG_SOC_IMX27) += cpu-imx27.o pm-imx27.o
obj-$(CONFIG_SOC_IMX27) += clock-imx27.o mm-imx27.o ehci-imx27.o
obj-$(CONFIG_SOC_IMX31) += mm-imx3.o cpu-imx31.o clock-imx31.o iomux-imx31.o ehci-imx31.o
obj-$(CONFIG_SOC_IMX35) += mm-imx3.o cpu-imx35.o clock-imx35.o ehci-imx35.o
obj-$(CONFIG_SOC_IMX31) += mm-imx3.o cpu-imx31.o clock-imx31.o iomux-imx31.o ehci-imx31.o pm-imx3.o
obj-$(CONFIG_SOC_IMX35) += mm-imx3.o cpu-imx35.o clock-imx35.o ehci-imx35.o pm-imx3.o
obj-$(CONFIG_SOC_IMX5) += cpu-imx5.o mm-imx5.o clock-mx51-mx53.o ehci-imx5.o pm-imx5.o cpu_op-mx51.o

1
arch/arm/mach-imx/crmregs-imx31.h
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@ -64,6 +64,7 @@
#define MXC_CCM_CCMR_SSI2S_MASK (0x3 << 21)
#define MXC_CCM_CCMR_LPM_OFFSET 14
#define MXC_CCM_CCMR_LPM_MASK (0x3 << 14)
#define MXC_CCM_CCMR_LPM_WAIT_MX35 (0x1 << 14)
#define MXC_CCM_CCMR_FIRS_OFFSET 11
#define MXC_CCM_CCMR_FIRS_MASK (0x3 << 11)
#define MXC_CCM_CCMR_UPE (1 << 9)

5
arch/arm/mach-imx/mm-imx3.c
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@ -34,6 +34,8 @@ static void imx3_idle(void)
{
unsigned long reg = 0;
mx3_cpu_lp_set(MX3_WAIT);
__asm__ __volatile__(
/* disable I and D cache */
"mrc p15, 0, %0, c1, c0, 0\n"
@ -173,6 +175,9 @@ void __init imx31_soc_init(void)
}
imx_add_imx_sdma("imx31-sdma", MX31_SDMA_BASE_ADDR, MX31_INT_SDMA, &imx31_sdma_pdata);
imx_set_aips(MX31_IO_ADDRESS(MX31_AIPS1_BASE_ADDR));
imx_set_aips(MX31_IO_ADDRESS(MX31_AIPS2_BASE_ADDR));
}
#endif /* ifdef CONFIG_SOC_IMX31 */

37
arch/arm/mach-imx/pm-imx3.c Normal file
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@ -0,0 +1,37 @@
/*
* Copyright (C) 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
*/
#include <linux/io.h>
#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/devices-common.h>
#include "crmregs-imx3.h"
/*
* Set cpu low power mode before WFI instruction. This function is called
* mx3 because it can be used for mx31 and mx35.
* Currently only WAIT_MODE is supported.
*/
void mx3_cpu_lp_set(enum mx3_cpu_pwr_mode mode)
{
int reg = __raw_readl(MXC_CCM_CCMR);
reg &= ~MXC_CCM_CCMR_LPM_MASK;
switch (mode) {
case MX3_WAIT:
if (cpu_is_mx35())
reg |= MXC_CCM_CCMR_LPM_WAIT_MX35;
__raw_writel(reg, MXC_CCM_CCMR);
break;
default:
pr_err("Unknown cpu power mode: %d\n", mode);
return;
}
}

24
arch/arm/plat-mxc/cpu.c
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@ -1,5 +1,6 @@
#include <linux/module.h>
#include <linux/io.h>
#include <mach/hardware.h>
unsigned int __mxc_cpu_type;
@ -18,3 +19,26 @@ void imx_print_silicon_rev(const char *cpu, int srev)
pr_info("CPU identified as %s, silicon rev %d.%d\n",
cpu, (srev >> 4) & 0xf, srev & 0xf);
}
void __init imx_set_aips(void __iomem *base)
{
unsigned int reg;
/*
* Set all MPROTx to be non-bufferable, trusted for R/W,
* not forced to user-mode.
*/
__raw_writel(0x77777777, base + 0x0);
__raw_writel(0x77777777, base + 0x4);
/*
* Set all OPACRx to be non-bufferable, to not require
* supervisor privilege level for access, allow for
* write access and untrusted master access.
*/
__raw_writel(0x0, base + 0x40);
__raw_writel(0x0, base + 0x44);
__raw_writel(0x0, base + 0x48);
__raw_writel(0x0, base + 0x4C);
reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
__raw_writel(reg, base + 0x50);
}

9
arch/arm/plat-mxc/include/mach/common.h
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@ -75,6 +75,7 @@ extern void mxc_restart(char, const char *);
extern void mxc_arch_reset_init(void __iomem *);
extern int mx53_revision(void);
extern int mx53_display_revision(void);
extern void imx_set_aips(void __iomem *);
enum mxc_cpu_pwr_mode {
WAIT_CLOCKED, /* wfi only */
@ -84,6 +85,14 @@ enum mxc_cpu_pwr_mode {
STOP_POWER_OFF, /* STOP + SRPG */
};
enum mx3_cpu_pwr_mode {
MX3_RUN,
MX3_WAIT,
MX3_DOZE,
MX3_SLEEP,
};
extern void mx3_cpu_lp_set(enum mx3_cpu_pwr_mode mode);
extern void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode);
extern void imx_print_silicon_rev(const char *cpu, int srev);