From patchwork Sun May 3 14:19:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Fan X-Patchwork-Id: 244911 List-Id: U-Boot discussion From: peng.fan at nxp.com (Peng Fan) Date: Sun, 3 May 2020 22:19:54 +0800 Subject: [PATCH 10/13] imx: load calibration parameters from fuse for i.MX8MP In-Reply-To: <20200503141957.14635-1-peng.fan@nxp.com> References: <20200503141957.14635-1-peng.fan@nxp.com> Message-ID: <20200503141957.14635-11-peng.fan@nxp.com> From: Ye Li i.MX8MP thermal which has two probes and supports temperature range from -40 to 125. The driver still uses default 1p HW calibration at 25C and loads calibration parameters from fuse. Reviewed-by: Peng Fan Signed-off-by: Ye Li Signed-off-by: Peng Fan --- arch/arm/mach-imx/imx8m/soc.c | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index 1f42455aa0..adb444b240 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -425,4 +425,49 @@ void imx_tmu_arch_init(void *reg_base) writel((tca_en << 31) | (tca_hr << 16) | tca_rt, (ulong)reg_base + 0x30); } +#ifdef CONFIG_IMX8MP + /* Load TCALIV0/1/m40 and TRIM from fuses */ + struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; + struct fuse_bank *bank = &ocotp->bank[38]; + struct fuse_bank38_regs *fuse = + (struct fuse_bank38_regs *)bank->fuse_regs; + struct fuse_bank *bank2 = &ocotp->bank[39]; + struct fuse_bank39_regs *fuse2 = + (struct fuse_bank39_regs *)bank2->fuse_regs; + u32 buf_vref, buf_slope, bjt_cur, vlsb, bgr; + u32 reg; + u32 tca40[2], tca25[2], tca105[2]; + + /* For blank sample */ + if (!fuse->ana_trim2 && !fuse->ana_trim3 && + !fuse->ana_trim4 && !fuse2->ana_trim5) { + /* Use a default 25C binary codes */ + tca25[0] = 1596; + writel(tca25[0], (ulong)reg_base + 0x30); + return; + } + + buf_vref = (fuse->ana_trim2 & 0xc0) >> 6; + buf_slope = (fuse->ana_trim2 & 0xF00) >> 8; + bjt_cur = (fuse->ana_trim2 & 0xF000) >> 12; + bgr = (fuse->ana_trim2 & 0xF0000) >> 16; + vlsb = (fuse->ana_trim2 & 0xF00000) >> 20; + writel(buf_vref | (buf_slope << 16), (ulong)reg_base + 0x28); + + reg = (bgr << 28) | (bjt_cur << 20) | (vlsb << 12) | (1 << 7); + writel(reg, (ulong)reg_base + 0x3c); + + tca40[0] = (fuse->ana_trim3 & 0xFFF0000) >> 16; + tca25[0] = (fuse->ana_trim3 & 0xF0000000) >> 28; + tca25[0] |= ((fuse->ana_trim4 & 0xFF) << 4); + tca105[0] = (fuse->ana_trim4 & 0xFFF00) >> 8; + tca40[1] = (fuse->ana_trim4 & 0xFFF00000) >> 20; + tca25[1] = fuse2->ana_trim5 & 0xFFF; + tca105[1] = (fuse2->ana_trim5 & 0xFFF000) >> 12; + + /* use 25c for 1p calibration */ + writel(tca25[0] | (tca105[0] << 16), (ulong)reg_base + 0x30); + writel(tca25[1] | (tca105[1] << 16), (ulong)reg_base + 0x34); + writel(tca40[0] | (tca40[1] << 16), (ulong)reg_base + 0x38); +#endif }