From patchwork Wed Jun 9 18:50:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dinh Nguyen X-Patchwork-Id: 12311073 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68FA8C48BE0 for ; Wed, 9 Jun 2021 18:50:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 518BA613F0 for ; Wed, 9 Jun 2021 18:50:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229517AbhFISwR (ORCPT ); Wed, 9 Jun 2021 14:52:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:45310 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230245AbhFISwQ (ORCPT ); Wed, 9 Jun 2021 14:52:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E34A613EF; Wed, 9 Jun 2021 18:50:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623264622; bh=kcI1xHVT7nDaM/8YII52py4VxFNx9/HKQeHX/LSESlg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U1ud/7Z9aradeNq+86lte9uQZQVekM+7h3Dz9pcJqkFKOHZA7rJiTtLAxElyIAHQ4 7vfG3557SZ1s9/BoLmA40UvcyPLRlIJ+FKcT7CpftN/3LECd1ITfUO0A8eAkR/S4zu Ap8BbGHjGJdp7dU7Ph22OXicsyR7NE6x5MKff0ptvRJvViy0zz25O5lS0QZz4jLs2G p2qAQpJgXhWCG2BHCpeNgGCf7Xmjl8lWCENoibfMFPdaV2MMg7snrh97RSVSZf7BGP jZJkMBItD7jb6xsoWCpeEzd2P72TQHIvhAgi81f4Xnfjlk4Gi8x1OOCUHRktRQI99y NLwvaFTUjVvlA== From: Dinh Nguyen To: linux-clk@vger.kernel.org Cc: dinguyen@kernel.org, sboyd@kernel.org, mturquette@baylibre.com, stable@vger.kernel.org Subject: [PATCH 3/4] clk: agilex/stratix10: add support for the 2nd bypass Date: Wed, 9 Jun 2021 13:50:07 -0500 Message-Id: <20210609185008.36056-3-dinguyen@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210609185008.36056-1-dinguyen@kernel.org> References: <20210609185008.36056-1-dinguyen@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org The EMAC clocks on Stratix10/Agilex/N5X have an additional bypass that was not being accounted for. The bypass selects between emaca_clk/emacb_clk and boot_clk. Because the bypass register offset is different between Stratix10 and Agilex/N5X, it's best to create a new function to calculate the bypass. Fixes: 80c6b7a0894f ("clk: socfpga: agilex: add clock driver for the Agilex platform") Signed-off-by: Dinh Nguyen --- drivers/clk/socfpga/clk-agilex.c | 4 +- drivers/clk/socfpga/clk-gate-s10.c | 119 +++++++++++++++++++++++++++- drivers/clk/socfpga/stratix10-clk.h | 2 + 3 files changed, 123 insertions(+), 2 deletions(-) diff --git a/drivers/clk/socfpga/clk-agilex.c b/drivers/clk/socfpga/clk-agilex.c index edfa87d0cd76..1cb21ea79c64 100644 --- a/drivers/clk/socfpga/clk-agilex.c +++ b/drivers/clk/socfpga/clk-agilex.c @@ -177,6 +177,8 @@ static const struct clk_parent_data emac_mux[] = { .name = "emaca_free_clk", }, { .fw_name = "emacb_free_clk", .name = "emacb_free_clk", }, + { .fw_name = "boot_clk", + .name = "boot_clk", }, }; static const struct clk_parent_data noc_mux[] = { @@ -399,7 +401,7 @@ static int agilex_clk_register_gate(const struct stratix10_gate_clock *clks, int i; for (i = 0; i < nums; i++) { - hw_clk = s10_register_gate(&clks[i], base); + hw_clk = agilex_register_gate(&clks[i], base); if (IS_ERR(hw_clk)) { pr_err("%s: failed to register clock %s\n", __func__, clks[i].name); diff --git a/drivers/clk/socfpga/clk-gate-s10.c b/drivers/clk/socfpga/clk-gate-s10.c index b84f2627551e..32567795765f 100644 --- a/drivers/clk/socfpga/clk-gate-s10.c +++ b/drivers/clk/socfpga/clk-gate-s10.c @@ -11,6 +11,13 @@ #define SOCFPGA_CS_PDBG_CLK "cs_pdbg_clk" #define to_socfpga_gate_clk(p) container_of(p, struct socfpga_gate_clk, hw.hw) +#define SOCFPGA_EMAC0_CLK "emac0_clk" +#define SOCFPGA_EMAC1_CLK "emac1_clk" +#define SOCFPGA_EMAC2_CLK "emac2_clk" +#define AGILEX_BYPASS_OFFSET 0xC +#define STRATIX10_BYPASS_OFFSET 0x2C +#define BOOTCLK_BYPASS 2 + static unsigned long socfpga_gate_clk_recalc_rate(struct clk_hw *hwclk, unsigned long parent_rate) { @@ -44,14 +51,61 @@ static unsigned long socfpga_dbg_clk_recalc_rate(struct clk_hw *hwclk, static u8 socfpga_gate_get_parent(struct clk_hw *hwclk) { struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(hwclk); - u32 mask; + u32 mask, second_bypass; + u8 parent = 0; + const char *name = clk_hw_get_name(hwclk); + + if (socfpgaclk->bypass_reg) { + mask = (0x1 << socfpgaclk->bypass_shift); + parent = ((readl(socfpgaclk->bypass_reg) & mask) >> + socfpgaclk->bypass_shift); + } + + if (streq(name, SOCFPGA_EMAC0_CLK) || + streq(name, SOCFPGA_EMAC1_CLK) || + streq(name, SOCFPGA_EMAC2_CLK)) { + second_bypass = readl(socfpgaclk->bypass_reg - + STRATIX10_BYPASS_OFFSET); + /* EMACA bypass to bootclk @0xB0 offset */ + if (second_bypass & 0x1) + if (parent == 0) /* only applicable if parent is maca */ + parent = BOOTCLK_BYPASS; + + if (second_bypass & 0x2) + if (parent == 1) /* only applicable if parent is macb */ + parent = BOOTCLK_BYPASS; + } + return parent; +} + +static u8 socfpga_agilex_gate_get_parent(struct clk_hw *hwclk) +{ + struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(hwclk); + u32 mask, second_bypass; u8 parent = 0; + const char *name = clk_hw_get_name(hwclk); if (socfpgaclk->bypass_reg) { mask = (0x1 << socfpgaclk->bypass_shift); parent = ((readl(socfpgaclk->bypass_reg) & mask) >> socfpgaclk->bypass_shift); } + + if (streq(name, SOCFPGA_EMAC0_CLK) || + streq(name, SOCFPGA_EMAC1_CLK) || + streq(name, SOCFPGA_EMAC2_CLK)) { + second_bypass = readl(socfpgaclk->bypass_reg - + AGILEX_BYPASS_OFFSET); + /* EMACA bypass to bootclk @0x88 offset */ + if (second_bypass & 0x1) + if (parent == 0) /* only applicable if parent is maca */ + parent = BOOTCLK_BYPASS; + + if (second_bypass & 0x2) + if (parent == 1) /* only applicable if parent is macb */ + parent = BOOTCLK_BYPASS; + } + return parent; } @@ -60,6 +114,11 @@ static struct clk_ops gateclk_ops = { .get_parent = socfpga_gate_get_parent, }; +static const struct clk_ops agilex_gateclk_ops = { + .recalc_rate = socfpga_gate_clk_recalc_rate, + .get_parent = socfpga_agilex_gate_get_parent, +}; + static const struct clk_ops dbgclk_ops = { .recalc_rate = socfpga_dbg_clk_recalc_rate, .get_parent = socfpga_gate_get_parent, @@ -122,3 +181,61 @@ struct clk_hw *s10_register_gate(const struct stratix10_gate_clock *clks, void _ } return hw_clk; } + +struct clk_hw *agilex_register_gate(const struct stratix10_gate_clock *clks, void __iomem *regbase) +{ + struct clk_hw *hw_clk; + struct socfpga_gate_clk *socfpga_clk; + struct clk_init_data init; + const char *parent_name = clks->parent_name; + int ret; + + socfpga_clk = kzalloc(sizeof(*socfpga_clk), GFP_KERNEL); + if (!socfpga_clk) + return NULL; + + socfpga_clk->hw.reg = regbase + clks->gate_reg; + socfpga_clk->hw.bit_idx = clks->gate_idx; + + gateclk_ops.enable = clk_gate_ops.enable; + gateclk_ops.disable = clk_gate_ops.disable; + + socfpga_clk->fixed_div = clks->fixed_div; + + if (clks->div_reg) + socfpga_clk->div_reg = regbase + clks->div_reg; + else + socfpga_clk->div_reg = NULL; + + socfpga_clk->width = clks->div_width; + socfpga_clk->shift = clks->div_offset; + + if (clks->bypass_reg) + socfpga_clk->bypass_reg = regbase + clks->bypass_reg; + else + socfpga_clk->bypass_reg = NULL; + socfpga_clk->bypass_shift = clks->bypass_shift; + + if (streq(clks->name, "cs_pdbg_clk")) + init.ops = &dbgclk_ops; + else + init.ops = &agilex_gateclk_ops; + + init.name = clks->name; + init.flags = clks->flags; + + init.num_parents = clks->num_parents; + init.parent_names = parent_name ? &parent_name : NULL; + if (init.parent_names == NULL) + init.parent_data = clks->parent_data; + socfpga_clk->hw.hw.init = &init; + + hw_clk = &socfpga_clk->hw.hw; + + ret = clk_hw_register(NULL, &socfpga_clk->hw.hw); + if (ret) { + kfree(socfpga_clk); + return ERR_PTR(ret); + } + return hw_clk; +} diff --git a/drivers/clk/socfpga/stratix10-clk.h b/drivers/clk/socfpga/stratix10-clk.h index 61eaf3a41fbb..75234e0783e1 100644 --- a/drivers/clk/socfpga/stratix10-clk.h +++ b/drivers/clk/socfpga/stratix10-clk.h @@ -85,4 +85,6 @@ struct clk_hw *s10_register_cnt_periph(const struct stratix10_perip_cnt_clock *c void __iomem *reg); struct clk_hw *s10_register_gate(const struct stratix10_gate_clock *clks, void __iomem *reg); +struct clk_hw *agilex_register_gate(const struct stratix10_gate_clock *clks, + void __iomem *reg); #endif /* __STRATIX10_CLK_H */