From: Iwona Winiarska <iwona.winiarska@intel.com> To: openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Cc: Billy Tsai <billy_tsai@aspeedtech.com>, Iwona Winiarska <iwona.winiarska@intel.com> Subject: [PATCH] peci: aspeed: Clear clock_divider value before setting it Date: Wed, 17 Apr 2024 15:48:49 +0200 [thread overview] Message-ID: <20240417134849.5793-1-iwona.winiarska@intel.com> (raw) PECI clock divider is programmed on 10:8 bits of PECI Control register. Before setting a new value, clear bits read from hardware. Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com> --- drivers/peci/controller/peci-aspeed.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/peci/controller/peci-aspeed.c b/drivers/peci/controller/peci-aspeed.c index 7fdc25afcf2f..de7046e6b9c4 100644 --- a/drivers/peci/controller/peci-aspeed.c +++ b/drivers/peci/controller/peci-aspeed.c @@ -351,6 +351,7 @@ static int clk_aspeed_peci_set_rate(struct clk_hw *hw, unsigned long rate, clk_aspeed_peci_find_div_values(this_rate, &msg_timing, &clk_div_exp); val = readl(aspeed_peci->base + ASPEED_PECI_CTRL); + val &= ~ASPEED_PECI_CTRL_CLK_DIV_MASK; val |= FIELD_PREP(ASPEED_PECI_CTRL_CLK_DIV_MASK, clk_div_exp); writel(val, aspeed_peci->base + ASPEED_PECI_CTRL); -- 2.44.0
WARNING: multiple messages have this Message-ID (diff)
From: Iwona Winiarska <iwona.winiarska@intel.com> To: openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Cc: Billy Tsai <billy_tsai@aspeedtech.com>, Iwona Winiarska <iwona.winiarska@intel.com> Subject: [PATCH] peci: aspeed: Clear clock_divider value before setting it Date: Wed, 17 Apr 2024 15:48:49 +0200 [thread overview] Message-ID: <20240417134849.5793-1-iwona.winiarska@intel.com> (raw) PECI clock divider is programmed on 10:8 bits of PECI Control register. Before setting a new value, clear bits read from hardware. Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com> --- drivers/peci/controller/peci-aspeed.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/peci/controller/peci-aspeed.c b/drivers/peci/controller/peci-aspeed.c index 7fdc25afcf2f..de7046e6b9c4 100644 --- a/drivers/peci/controller/peci-aspeed.c +++ b/drivers/peci/controller/peci-aspeed.c @@ -351,6 +351,7 @@ static int clk_aspeed_peci_set_rate(struct clk_hw *hw, unsigned long rate, clk_aspeed_peci_find_div_values(this_rate, &msg_timing, &clk_div_exp); val = readl(aspeed_peci->base + ASPEED_PECI_CTRL); + val &= ~ASPEED_PECI_CTRL_CLK_DIV_MASK; val |= FIELD_PREP(ASPEED_PECI_CTRL_CLK_DIV_MASK, clk_div_exp); writel(val, aspeed_peci->base + ASPEED_PECI_CTRL); -- 2.44.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2024-04-17 13:49 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-17 13:48 Iwona Winiarska [this message] 2024-04-17 13:48 ` [PATCH] peci: aspeed: Clear clock_divider value before setting it Iwona Winiarska 2024-04-17 23:41 ` Andrew Jeffery 2024-04-17 23:41 ` Andrew Jeffery 2024-04-18 13:41 ` Winiarska, Iwona 2024-04-18 13:41 ` Winiarska, Iwona 2024-04-18 23:25 ` Andrew Jeffery 2024-04-18 23:25 ` Andrew Jeffery
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