+++ /dev/null
-From 0377ad93031d3e51c2afe44231241185f684b6af Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
-Date: Fri, 5 Mar 2021 15:14:32 +0100
-Subject: [PATCH 1/2] mips: bmips: automatically detect CPU frequency
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Some BCM63xx SoCs support multiple CPU frequencies depending on HW config.
-
-Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
----
- arch/mips/bmips/setup.c | 198 ++++++++++++++++++++++++++++++++++++++--
- 1 file changed, 191 insertions(+), 7 deletions(-)
-
---- a/arch/mips/bmips/setup.c
-+++ b/arch/mips/bmips/setup.c
-@@ -31,11 +31,51 @@
-
- #define RELO_NORMAL_VEC BIT(18)
-
-+#define REG_BCM6318_SOB ((void __iomem *)CKSEG1ADDR(0x10000900))
-+#define BCM6318_FREQ_SHIFT 23
-+#define BCM6318_FREQ_MASK (0x3 << BCM6318_FREQ_SHIFT)
-+
- #define REG_BCM6328_OTP ((void __iomem *)CKSEG1ADDR(0x1000062c))
- #define BCM6328_TP1_DISABLED BIT(9)
-+#define REG_BCM6328_MISC_SB ((void __iomem *)CKSEG1ADDR(0x10001a40))
-+#define BCM6328_FCVO_SHIFT 7
-+#define BCM6328_FCVO_MASK (0x1f << BCM6328_FCVO_SHIFT)
-+
-+#define REG_BCM6358_DDR_PLLC ((void __iomem *)0xfffe12b8)
-+#define BCM6358_PLLC_M1_SHIFT 0
-+#define BCM6358_PLLC_M1_MASK (0xff << BCM6358_PLLC_M1_SHIFT)
-+#define BCM6358_PLLC_N1_SHIFT 23
-+#define BCM6358_PLLC_N1_MASK (0x3f << BCM6358_PLLC_N1_SHIFT)
-+#define BCM6358_PLLC_N2_SHIFT 29
-+#define BCM6358_PLLC_N2_MASK (0x7 << BCM6358_PLLC_N2_SHIFT)
-+
-+#define REG_BCM6362_MISC_SB ((void __iomem *)CKSEG1ADDR(0x10001814))
-+#define BCM6362_FCVO_SHIFT 1
-+#define BCM6362_FCVO_MASK (0x1f << BCM6362_FCVO_SHIFT)
-+
-+#define REG_BCM6368_DDR_PLLC ((void __iomem *)CKSEG1ADDR(0x100012a0))
-+#define BCM6368_PLLC_P1_SHIFT 0
-+#define BCM6368_PLLC_P1_MASK (0xf << BCM6368_PLLC_P1_SHIFT)
-+#define BCM6368_PLLC_P2_SHIFT 4
-+#define BCM6368_PLLC_P2_MASK (0xf << BCM6368_PLLC_P2_SHIFT)
-+#define BCM6368_PLLC_NDIV_SHIFT 16
-+#define BCM6368_PLLC_NDIV_MASK (0x1ff << BCM6368_PLLC_NDIV_SHIFT)
-+#define REG_BCM6368_DDR_PLLD ((void __iomem *)CKSEG1ADDR(0x100012a4))
-+#define BCM6368_PLLD_MDIV_SHIFT 0
-+#define BCM6368_PLLD_MDIV_MASK (0xff << BCM6368_PLLD_MDIV_SHIFT)
-+
-+#define REG_BCM63268_MISC_SB ((void __iomem *)CKSEG1ADDR(0x10001814))
-+#define BCM63268_FCVO_SHIFT 21
-+#define BCM63268_FCVO_MASK (0xf << BCM63268_FCVO_SHIFT)
-+
-
- static const unsigned long kbase = VMLINUX_LOAD_ADDRESS & 0xfff00000;
-
-+struct bmips_cpufreq {
-+ const char *compatible;
-+ u32 (*cpu_freq)(void);
-+};
-+
- struct bmips_quirk {
- const char *compatible;
- void (*quirk_fn)(void);
-@@ -138,17 +178,161 @@ const char *get_system_type(void)
- return "Generic BMIPS kernel";
- }
-
-+static u32 bcm6318_cpufreq(void)
-+{
-+ u32 val = __raw_readl(REG_BCM6318_SOB);
-+
-+ switch ((val & BCM6318_FREQ_MASK) >> BCM6318_FREQ_SHIFT) {
-+ case 0:
-+ return 166000000;
-+ case 2:
-+ return 250000000;
-+ case 3:
-+ return 333000000;
-+ case 1:
-+ return 400000000;
-+ default:
-+ return 0;
-+ }
-+}
-+
-+static u32 bcm6328_cpufreq(void)
-+{
-+ u32 val = __raw_readl(REG_BCM6328_MISC_SB);
-+
-+ switch ((val & BCM6328_FCVO_MASK) >> BCM6328_FCVO_SHIFT) {
-+ case 0x12:
-+ case 0x14:
-+ case 0x19:
-+ return 160000000;
-+ case 0x1c:
-+ return 192000000;
-+ case 0x13:
-+ case 0x15:
-+ return 200000000;
-+ case 0x1a:
-+ return 384000000;
-+ case 0x16:
-+ return 400000000;
-+ default:
-+ return 320000000;
-+ }
-+}
-+
-+static u32 bcm6358_cpufreq(void)
-+{
-+ u32 val, n1, n2, m1;
-+
-+ val = __raw_readl(REG_BCM6358_DDR_PLLC);
-+ n1 = (val & BCM6358_PLLC_N1_MASK) >> BCM6358_PLLC_N1_SHIFT;
-+ n2 = (val & BCM6358_PLLC_N2_MASK) >> BCM6358_PLLC_N2_SHIFT;
-+ m1 = (val & BCM6358_PLLC_M1_MASK) >> BCM6358_PLLC_M1_SHIFT;
-+
-+ return (16 * 1000000 * n1 * n2) / m1;
-+}
-+
-+static u32 bcm6362_cpufreq(void)
-+{
-+ u32 val = __raw_readl(REG_BCM6362_MISC_SB);
-+
-+ switch ((val & BCM6362_FCVO_MASK) >> BCM6362_FCVO_SHIFT) {
-+ case 0x04:
-+ case 0x0c:
-+ case 0x14:
-+ case 0x1c:
-+ return 160000000;
-+ case 0x15:
-+ case 0x1d:
-+ return 200000000;
-+ case 0x03:
-+ case 0x0b:
-+ case 0x13:
-+ case 0x1b:
-+ return 240000000;
-+ case 0x07:
-+ case 0x17:
-+ return 384000000;
-+ case 0x05:
-+ case 0x0e:
-+ case 0x16:
-+ case 0x1e:
-+ case 0x1f:
-+ return 400000000;
-+ case 0x06:
-+ return 440000000;
-+ default:
-+ return 320000000;
-+ }
-+}
-+
-+static u32 bcm6368_cpufreq(void)
-+{
-+ u32 val, p1, p2, ndiv, m1;
-+
-+ val = __raw_readl(REG_BCM6368_DDR_PLLC);
-+ p1 = (val & BCM6368_PLLC_P1_MASK) >> BCM6368_PLLC_P1_SHIFT;
-+ p2 = (val & BCM6368_PLLC_P2_MASK) >> BCM6368_PLLC_P2_SHIFT;
-+ ndiv = (val & BCM6368_PLLC_NDIV_MASK) >>
-+ BCM6368_PLLC_NDIV_SHIFT;
-+
-+ val = __raw_readl(REG_BCM6368_DDR_PLLD);
-+ m1 = (val & BCM6368_PLLD_MDIV_MASK) >> BCM6368_PLLD_MDIV_SHIFT;
-+
-+ return (((64 * 1000000) / p1) * p2 * ndiv) / m1;
-+}
-+
-+static u32 bcm63268_cpufreq(void)
-+{
-+ u32 val = __raw_readl(REG_BCM63268_MISC_SB);
-+
-+ switch ((val & BCM63268_FCVO_MASK) >> BCM63268_FCVO_SHIFT) {
-+ case 0x3:
-+ case 0xe:
-+ return 320000000;
-+ case 0xa:
-+ return 333000000;
-+ case 0x2:
-+ case 0xb:
-+ case 0xf:
-+ return 400000000;
-+ default:
-+ return 0;
-+ }
-+}
-+
-+static const struct bmips_cpufreq bmips_cpufreq_list[] = {
-+ { "brcm,bcm6318", &bcm6318_cpufreq },
-+ { "brcm,bcm6328", &bcm6328_cpufreq },
-+ { "brcm,bcm6358", &bcm6358_cpufreq },
-+ { "brcm,bcm6362", &bcm6362_cpufreq },
-+ { "brcm,bcm6368", &bcm6368_cpufreq },
-+ { "brcm,bcm63268", &bcm63268_cpufreq },
-+ { /* sentinel */ }
-+};
-+
- void __init plat_time_init(void)
- {
-+ const struct bmips_cpufreq *cf;
- struct device_node *np;
-- u32 freq;
-+ u32 freq = 0;
-
-- np = of_find_node_by_name(NULL, "cpus");
-- if (!np)
-- panic("missing 'cpus' DT node");
-- if (of_property_read_u32(np, "mips-hpt-frequency", &freq) < 0)
-- panic("missing 'mips-hpt-frequency' property");
-- of_node_put(np);
-+ for (cf = bmips_cpufreq_list; cf->cpu_freq; cf++) {
-+ if (of_flat_dt_is_compatible(of_get_flat_dt_root(),
-+ cf->compatible)) {
-+ freq = cf->cpu_freq() / 2;
-+ printk("%s detected @ %u MHz\n", cf->compatible, freq / 500000);
-+ break;
-+ }
-+ }
-+
-+ if (!freq) {
-+ np = of_find_node_by_name(NULL, "cpus");
-+ if (!np)
-+ panic("missing 'cpus' DT node");
-+ if (of_property_read_u32(np, "mips-hpt-frequency", &freq) < 0)
-+ panic("missing 'mips-hpt-frequency' property");
-+ of_node_put(np);
-+ }
-
- mips_hpt_frequency = freq;
- }
projects / openwrt / staging / ldir.git / blobdiff