From 455271d9dc5f4cce3d35c5819f8f01c723bca94c Mon Sep 17 00:00:00 2001 From: Sowjanya Komatineni Date: Fri, 16 Aug 2019 12:42:04 -0700 Subject: [PATCH] soc/tegra: pmc: Configure core power request polarity This patch configures polarity of the core power request signal in PMC control register based on the device tree property. PMC asserts and de-asserts power request signal based on it polarity when it need to power-up and power-down the core rail during SC7. Reviewed-by: Dmitry Osipenko Signed-off-by: Sowjanya Komatineni Signed-off-by: Thierry Reding --- drivers/soc/tegra/pmc.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index e1f14098bd2d..41e974cd91fe 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -56,6 +56,7 @@ #define PMC_CNTRL_SIDE_EFFECT_LP0 BIT(14) /* LP0 when CPU pwr gated */ #define PMC_CNTRL_SYSCLK_OE BIT(11) /* system clock enable */ #define PMC_CNTRL_SYSCLK_POLARITY BIT(10) /* sys clk polarity */ +#define PMC_CNTRL_PWRREQ_POLARITY BIT(8) #define PMC_CNTRL_MAIN_RST BIT(4) #define PMC_WAKE_MASK 0x0c @@ -2316,6 +2317,11 @@ static void tegra20_pmc_init(struct tegra_pmc *pmc) else value |= PMC_CNTRL_SYSCLK_POLARITY; + if (pmc->corereq_high) + value &= ~PMC_CNTRL_PWRREQ_POLARITY; + else + value |= PMC_CNTRL_PWRREQ_POLARITY; + /* configure the output polarity while the request is tristated */ tegra_pmc_writel(pmc, value, PMC_CNTRL);