Add glue logic to hook-up AM35x processors with TPS65023. Signed-off-by: Sanjeev Premi <premi@xxxxxx> --- arch/arm/mach-omap2/am3517_tps.c | 96 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 96 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-omap2/am3517_tps.c diff --git a/arch/arm/mach-omap2/am3517_tps.c b/arch/arm/mach-omap2/am3517_tps.c new file mode 100644 index 0000000..cddd7eb --- /dev/null +++ b/arch/arm/mach-omap2/am3517_tps.c @@ -0,0 +1,96 @@ +/** + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * + * Based on omap_twl.c + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/i2c/twl.h> + +#include <plat/voltage.h> + +#include "pm.h" + +/* + * TODO: Copy of OMAP3 definitions to get thru compilation. + * May not be needed in final implementation. Need to + * relook at the the need again. + */ +#define OMAP3_SRI2C_SLAVE_ADDR 0x12 +#define OMAP3_VDD_MPU_SR_CONTROL_REG 0x00 +#define OMAP3_VDD_CORE_SR_CONTROL_REG 0x01 +#define OMAP3_VP_CONFIG_ERROROFFSET 0x00 +#define OMAP3_VP_VSTEPMIN_VSTEPMIN 0x1 +#define OMAP3_VP_VSTEPMAX_VSTEPMAX 0x04 +#define OMAP3_VP_VLIMITTO_TIMEOUT_US 200 + +#define OMAP3430_VP2_VLIMITTO_VDDMIN 0x18 +#define OMAP3430_VP2_VLIMITTO_VDDMAX 0x2c + +/** + * TBD: Update the formula below. + * Needs to be derived from a table. + */ +static unsigned long tps65023_vsel_to_uv(const u8 vsel) +{ + return (((vsel * 250) + 6000)) * 100; +} + +/** + * TBD: Update the formula below. + * Needs to be derived from a table. + */ +static u8 tps65023_uv_to_vsel(unsigned long uv) +{ + return DIV_ROUND_UP(uv - 600000, 25000); +} + +/** + * TBD: Just a copy of OMAP3 PMIC info. + * Many fields below don't make much sense for AM3517, + * but keeping them as is for now. + */ +static struct omap_volt_pmic_info am3517_volt_info = { + .slew_rate = 4000, + .step_size = 25000, + .on_volt = 1200000, + .onlp_volt = 1000000, + .ret_volt = 975000, + .off_volt = 600000, + .volt_setup_time = 0xfff, + .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET, + .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN, + .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX, + .vp_vddmin = OMAP3430_VP2_VLIMITTO_VDDMIN, + .vp_vddmax = OMAP3430_VP2_VLIMITTO_VDDMAX, + .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US, + .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR, + .pmic_reg = OMAP3_VDD_CORE_SR_CONTROL_REG, + .vsel_to_uv = tps65023_vsel_to_uv, + .uv_to_vsel = tps65023_uv_to_vsel, +}; + +int __init am3517_tps_init(void) +{ + struct voltagedomain *voltdm; + + if (!cpu_is_omap3505() && !cpu_is_omap3517()) + return -ENODEV; + + voltdm = omap_voltage_domain_lookup("mpu"); + omap_voltage_register_pmic(voltdm, &am3517_volt_info); + + return 0; +} + -- 1.7.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
