mx6: Read silicon revision from register

Instead of hardcoding the mx6 silicon revision, read it in run-time.

Also, besides the silicon version print the mx6 variant type: quad,dual/solo
or solo-lite.

Tested on a mx6qsabrelite, where it shows:

CPU:   Freescale i.MX6Q rev1.0 at 792 MHz

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Acked-by: Jason Liu <r64343@freescale.com>

arch/arm/cpu/armv7/imx-common/cpu.c

@@ -64,13 +64,33 @@ static char *get_reset_cause(void)
 }
 
 #if defined(CONFIG_DISPLAY_CPUINFO)
+
+static char *get_imx_type(u32 imxtype)
+{
+	switch (imxtype) {
+	case 0x63:
+		return "6Q";	/* Quad-core version of the mx6 */
+	case 0x61:
+		return "6DS";	/* Dual/Solo version of the mx6 */
+	case 0x60:
+		return "6SL";	/* Solo-Lite version of the mx6 */
+	case 0x51:
+		return "51";
+	case 0x53:
+		return "53";
+	default:
+		return "unknown";
+	}
+}
+
 int print_cpuinfo(void)
 {
 	u32 cpurev;
 
 	cpurev = get_cpu_rev();
-	printf("CPU:   Freescale i.MX%x family rev%d.%d at %d MHz\n",
-		(cpurev & 0xFF000) >> 12,
+
+	printf("CPU:   Freescale i.MX%s rev%d.%d at %d MHz\n",
+		get_imx_type((cpurev & 0xFF000) >> 12),
 		(cpurev & 0x000F0) >> 4,
 		(cpurev & 0x0000F) >> 0,
 		mxc_get_clock(MXC_ARM_CLK) / 1000000);

arch/arm/cpu/armv7/mx6/soc.c

@@ -32,7 +32,13 @@
 
 u32 get_cpu_rev(void)
 {
-	int system_rev = 0x61000 | CHIP_REV_1_0;
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	int reg = readl(&anatop->digprog);
+
+	/* Read mx6 variant: quad, dual or solo */
+	int system_rev = (reg >> 4) & 0xFF000;
+	/* Read mx6 silicon revision */
+	system_rev |= (reg & 0xFF) + 0x10;
 
 	return system_rev;
 }

arch/arm/include/asm/arch-mx6/imx-regs.h

@@ -294,5 +294,147 @@ struct aipstz_regs {
 	u32	opacr4;
 };
 
+struct anatop_regs {
+	u32	pll_sys;		/* 0x000 */
+	u32	pll_sys_set;		/* 0x004 */
+	u32	pll_sys_clr;		/* 0x008 */
+	u32	pll_sys_tog;		/* 0x00c */
+	u32	usb1_pll_480_ctrl;	/* 0x010 */
+	u32	usb1_pll_480_ctrl_set;	/* 0x014 */
+	u32	usb1_pll_480_ctrl_clr;	/* 0x018 */
+	u32	usb1_pll_480_ctrl_tog;	/* 0x01c */
+	u32	usb2_pll_480_ctrl;	/* 0x020 */
+	u32	usb2_pll_480_ctrl_set;	/* 0x024 */
+	u32	usb2_pll_480_ctrl_clr;	/* 0x028 */
+	u32	usb2_pll_480_ctrl_tog;	/* 0x02c */
+	u32	pll_528;		/* 0x030 */
+	u32	pll_528_set;		/* 0x034 */
+	u32	pll_528_clr;		/* 0x038 */
+	u32	pll_528_tog;		/* 0x03c */
+	u32	pll_528_ss;		/* 0x040 */
+	u32	rsvd0[3];
+	u32	pll_528_num;		/* 0x050 */
+	u32	rsvd1[3];
+	u32	pll_528_denom;		/* 0x060 */
+	u32	rsvd2[3];
+	u32	pll_audio;		/* 0x070 */
+	u32	pll_audio_set;		/* 0x074 */
+	u32	pll_audio_clr;		/* 0x078 */
+	u32	pll_audio_tog;		/* 0x07c */
+	u32	pll_audio_num;		/* 0x080 */
+	u32	rsvd3[3];
+	u32	pll_audio_denom;	/* 0x090 */
+	u32	rsvd4[3];
+	u32	pll_video;		/* 0x0a0 */
+	u32	pll_video_set;		/* 0x0a4 */
+	u32	pll_video_clr;		/* 0x0a8 */
+	u32	pll_video_tog;		/* 0x0ac */
+	u32	pll_video_num;		/* 0x0b0 */
+	u32	rsvd5[3];
+	u32	pll_video_denom;	/* 0x0c0 */
+	u32	rsvd6[3];
+	u32	pll_mlb;		/* 0x0d0 */
+	u32	pll_mlb_set;		/* 0x0d4 */
+	u32	pll_mlb_clr;		/* 0x0d8 */
+	u32	pll_mlb_tog;		/* 0x0dc */
+	u32	pll_enet;		/* 0x0e0 */
+	u32	pll_enet_set;		/* 0x0e4 */
+	u32	pll_enet_clr;		/* 0x0e8 */
+	u32	pll_enet_tog;		/* 0x0ec */
+	u32	pfd_480;		/* 0x0f0 */
+	u32	pfd_480_set;		/* 0x0f4 */
+	u32	pfd_480_clr;		/* 0x0f8 */
+	u32	pfd_480_tog;		/* 0x0fc */
+	u32	pfd_528;		/* 0x100 */
+	u32	pfd_528_set;		/* 0x104 */
+	u32	pfd_528_clr;		/* 0x108 */
+	u32	pfd_528_tog;		/* 0x10c */
+	u32	reg_1p1;		/* 0x110 */
+	u32	reg_1p1_set;		/* 0x114 */
+	u32	reg_1p1_clr;		/* 0x118 */
+	u32	reg_1p1_tog;		/* 0x11c */
+	u32	reg_3p0;		/* 0x120 */
+	u32	reg_3p0_set;		/* 0x124 */
+	u32	reg_3p0_clr;		/* 0x128 */
+	u32	reg_3p0_tog;		/* 0x12c */
+	u32	reg_2p5;		/* 0x130 */
+	u32	reg_2p5_set;		/* 0x134 */
+	u32	reg_2p5_clr;		/* 0x138 */
+	u32	reg_2p5_tog;		/* 0x13c */
+	u32	reg_core;		/* 0x140 */
+	u32	reg_core_set;		/* 0x144 */
+	u32	reg_core_clr;		/* 0x148 */
+	u32	reg_core_tog;		/* 0x14c */
+	u32	ana_misc0;		/* 0x150 */
+	u32	ana_misc0_set;		/* 0x154 */
+	u32	ana_misc0_clr;		/* 0x158 */
+	u32	ana_misc0_tog;		/* 0x15c */
+	u32	ana_misc1;		/* 0x160 */
+	u32	ana_misc1_set;		/* 0x164 */
+	u32	ana_misc1_clr;		/* 0x168 */
+	u32	ana_misc1_tog;		/* 0x16c */
+	u32	ana_misc2;		/* 0x170 */
+	u32	ana_misc2_set;		/* 0x174 */
+	u32	ana_misc2_clr;		/* 0x178 */
+	u32	ana_misc2_tog;		/* 0x17c */
+	u32	tempsense0;		/* 0x180 */
+	u32	tempsense0_set;		/* 0x184 */
+	u32	tempsense0_clr;		/* 0x188 */
+	u32	tempsense0_tog;		/* 0x18c */
+	u32	tempsense1;		/* 0x190 */
+	u32	tempsense1_set;		/* 0x194 */
+	u32	tempsense1_clr;		/* 0x198 */
+	u32	tempsense1_tog;		/* 0x19c */
+	u32	usb1_vbus_detect;	/* 0x1a0 */
+	u32	usb1_vbus_detect_set;	/* 0x1a4 */
+	u32	usb1_vbus_detect_clr;	/* 0x1a8 */
+	u32	usb1_vbus_detect_tog;	/* 0x1ac */
+	u32	usb1_chrg_detect;	/* 0x1b0 */
+	u32	usb1_chrg_detect_set;	/* 0x1b4 */
+	u32	usb1_chrg_detect_clr;	/* 0x1b8 */
+	u32	usb1_chrg_detect_tog;	/* 0x1bc */
+	u32	usb1_vbus_det_stat;	/* 0x1c0 */
+	u32	usb1_vbus_det_stat_set;	/* 0x1c4 */
+	u32	usb1_vbus_det_stat_clr;	/* 0x1c8 */
+	u32	usb1_vbus_det_stat_tog;	/* 0x1cc */
+	u32	usb1_chrg_det_stat;	/* 0x1d0 */
+	u32	usb1_chrg_det_stat_set;	/* 0x1d4 */
+	u32	usb1_chrg_det_stat_clr;	/* 0x1d8 */
+	u32	usb1_chrg_det_stat_tog;	/* 0x1dc */
+	u32	usb1_loopback;		/* 0x1e0 */
+	u32	usb1_loopback_set;	/* 0x1e4 */
+	u32	usb1_loopback_clr;	/* 0x1e8 */
+	u32	usb1_loopback_tog;	/* 0x1ec */
+	u32	usb1_misc;		/* 0x1f0 */
+	u32	usb1_misc_set;		/* 0x1f4 */
+	u32	usb1_misc_clr;		/* 0x1f8 */
+	u32	usb1_misc_tog;		/* 0x1fc */
+	u32	usb2_vbus_detect;	/* 0x200 */
+	u32	usb2_vbus_detect_set;	/* 0x204 */
+	u32	usb2_vbus_detect_clr;	/* 0x208 */
+	u32	usb2_vbus_detect_tog;	/* 0x20c */
+	u32	usb2_chrg_detect;	/* 0x210 */
+	u32	usb2_chrg_detect_set;	/* 0x214 */
+	u32	usb2_chrg_detect_clr;	/* 0x218 */
+	u32	usb2_chrg_detect_tog;	/* 0x21c */
+	u32	usb2_vbus_det_stat;	/* 0x220 */
+	u32	usb2_vbus_det_stat_set;	/* 0x224 */
+	u32	usb2_vbus_det_stat_clr;	/* 0x228 */
+	u32	usb2_vbus_det_stat_tog;	/* 0x22c */
+	u32	usb2_chrg_det_stat;	/* 0x230 */
+	u32	usb2_chrg_det_stat_set;	/* 0x234 */
+	u32	usb2_chrg_det_stat_clr;	/* 0x238 */
+	u32	usb2_chrg_det_stat_tog;	/* 0x23c */
+	u32	usb2_loopback;		/* 0x240 */
+	u32	usb2_loopback_set;	/* 0x244 */
+	u32	usb2_loopback_clr;	/* 0x248 */
+	u32	usb2_loopback_tog;	/* 0x24c */
+	u32	usb2_misc;		/* 0x250 */
+	u32	usb2_misc_set;		/* 0x254 */
+	u32	usb2_misc_clr;		/* 0x258 */
+	u32	usb2_misc_tog;		/* 0x25c */
+	u32	digprog;		/* 0x260 */
+};
+
 #endif /* __ASSEMBLER__*/
 #endif /* __ASM_ARCH_MX6_IMX_REGS_H__ */