ARM: imx: Get the silicon version from the IIM module
Instead of reading the silicon version from ROM, we should
read the SREV register from the IIM.
Freescale has dropped all support for MX51 REV1.0, only MX51
REV 2.0 and 3.0 are valid.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index ca4f9d5..344ee8e 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
@@ -780,6 +780,12 @@
.round_rate = _clk_ahb_round_rate,
};
+static struct clk iim_clk = {
+ .parent = &ipg_clk,
+ .enable_reg = MXC_CCM_CCGR0,
+ .enable_shift = MXC_CCM_CCGRx_CG15_OFFSET,
+};
+
/* Main IP interface clock for access to registers */
static struct clk ipg_clk = {
.parent = &ahb_clk,
@@ -1099,6 +1105,7 @@
_REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
_REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
_REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk)
+ _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
};
static struct clk_lookup mx53_lookups[] = {
@@ -1107,6 +1114,7 @@
_REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
_REGISTER_CLOCK(NULL, "gpt", gpt_clk)
_REGISTER_CLOCK("fec.0", NULL, fec_clk)
+ _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
};
static void clk_tree_init(void)
@@ -1147,6 +1155,10 @@
clk_enable(&cpu_clk);
clk_enable(&main_bus_clk);
+ clk_enable(&iim_clk);
+ mx51_revision();
+ clk_disable(&iim_clk);
+
/* set the usboh3_clk parent to pll2_sw_clk */
clk_set_parent(&usboh3_clk, &pll2_sw_clk);
@@ -1182,6 +1194,10 @@
clk_enable(&cpu_clk);
clk_enable(&main_bus_clk);
+ clk_enable(&iim_clk);
+ mx53_revision();
+ clk_disable(&iim_clk);
+
/* System timer */
mxc_timer_init(&gpt_clk, MX53_IO_ADDRESS(MX53_GPT1_BASE_ADDR),
MX53_INT_GPT);
diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c
index a00d2bc..d40671d 100644
--- a/arch/arm/mach-mx5/cpu.c
+++ b/arch/arm/mach-mx5/cpu.c
@@ -20,37 +20,18 @@
static int cpu_silicon_rev = -1;
-#define SI_REV 0x48
+#define IIM_SREV 0x24
-static void query_silicon_parameter(void)
+static int get_mx51_srev(void)
{
- void __iomem *rom = ioremap(MX51_IROM_BASE_ADDR, MX51_IROM_SIZE);
- u32 rev;
+ void __iomem *iim_base = MX51_IO_ADDRESS(MX51_IIM_BASE_ADDR);
+ u32 rev = readl(iim_base + IIM_SREV) & 0xff;
- if (!rom) {
- cpu_silicon_rev = -EINVAL;
- return;
- }
-
- rev = readl(rom + SI_REV);
- switch (rev) {
- case 0x1:
- cpu_silicon_rev = MX51_CHIP_REV_1_0;
- break;
- case 0x2:
- cpu_silicon_rev = MX51_CHIP_REV_1_1;
- break;
- case 0x10:
- cpu_silicon_rev = MX51_CHIP_REV_2_0;
- break;
- case 0x20:
- cpu_silicon_rev = MX51_CHIP_REV_3_0;
- break;
- default:
- cpu_silicon_rev = 0;
- }
-
- iounmap(rom);
+ if (rev == 0x0)
+ return IMX_CHIP_REVISION_2_0;
+ else if (rev == 0x10)
+ return IMX_CHIP_REVISION_3_0;
+ return 0;
}
/*
@@ -64,7 +45,7 @@
return -EINVAL;
if (cpu_silicon_rev == -1)
- query_silicon_parameter();
+ cpu_silicon_rev = get_mx51_srev();
return cpu_silicon_rev;
}
@@ -82,7 +63,7 @@
if (!cpu_is_mx51())
return 0;
- if (mx51_revision() < MX51_CHIP_REV_3_0 && (elf_hwcap & HWCAP_NEON)) {
+ if (mx51_revision() < IMX_CHIP_REVISION_3_0 && (elf_hwcap & HWCAP_NEON)) {
elf_hwcap &= ~HWCAP_NEON;
pr_info("Turning off NEON support, detected broken NEON implementation\n");
}
@@ -92,6 +73,18 @@
late_initcall(mx51_neon_fixup);
#endif
+static int get_mx53_srev(void)
+{
+ void __iomem *iim_base = MX51_IO_ADDRESS(MX53_IIM_BASE_ADDR);
+ u32 rev = readl(iim_base + IIM_SREV) & 0xff;
+
+ if (rev == 0x0)
+ return IMX_CHIP_REVISION_1_0;
+ else if (rev == 0x10)
+ return IMX_CHIP_REVISION_2_0;
+ return 0;
+}
+
/*
* Returns:
* the silicon revision of the cpu
@@ -103,7 +96,7 @@
return -EINVAL;
if (cpu_silicon_rev == -1)
- query_silicon_parameter();
+ cpu_silicon_rev = get_mx53_srev();
return cpu_silicon_rev;
}
diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
index cbaf282..e57f968 100644
--- a/arch/arm/mach-mx5/mm.c
+++ b/arch/arm/mach-mx5/mm.c
@@ -68,7 +68,7 @@
unsigned long tzic_addr;
void __iomem *tzic_virt;
- if (mx51_revision() < MX51_CHIP_REV_2_0)
+ if (mx51_revision() < IMX_CHIP_REVISION_2_0)
tzic_addr = MX51_TZIC_BASE_ADDR_TO1;
else
tzic_addr = MX51_TZIC_BASE_ADDR;