From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from ns.lynxeye.de ([87.118.118.114] helo=lynxeye.de) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UtOrT-0002dD-EP for barebox@lists.infradead.org; Sun, 30 Jun 2013 21:08:45 +0000 Received: from tellur.localdomain (p54832945.dip0.t-ipconnect.de [84.131.41.69]) by lynxeye.de (Postfix) with ESMTPA id 4AE8218B424F for ; Sun, 30 Jun 2013 23:06:57 +0200 (CEST) From: Lucas Stach Date: Sun, 30 Jun 2013 23:08:49 +0200 Message-Id: <1372626529-23443-7-git-send-email-dev@lynxeye.de> In-Reply-To: <1372626529-23443-1-git-send-email-dev@lynxeye.de> References: <1372626529-23443-1-git-send-email-dev@lynxeye.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 7/7] tegra: add peripheral clocks To: barebox@lists.infradead.org Only UART clocks are included for now, but the code should cover other peripherals needs, too. Signed-off-by: Lucas Stach --- arch/arm/mach-tegra/include/mach/tegra20-car.h | 49 ++++++ drivers/clk/tegra/Makefile | 1 + drivers/clk/tegra/clk-periph.c | 202 +++++++++++++++++++++++++ drivers/clk/tegra/clk-tegra20.c | 28 ++++ drivers/clk/tegra/clk.h | 23 +++ 5 files changed, 303 insertions(+) create mode 100644 drivers/clk/tegra/clk-periph.c diff --git a/arch/arm/mach-tegra/include/mach/tegra20-car.h b/arch/arm/mach-tegra/include/mach/tegra20-car.h index b770ae3..d4cb238 100644 --- a/arch/arm/mach-tegra/include/mach/tegra20-car.h +++ b/arch/arm/mach-tegra/include/mach/tegra20-car.h @@ -146,6 +146,55 @@ #define CRC_PLLE_BASE 0x0e8 #define CRC_PLLE_MISC 0x0ec +#define CRC_CLK_SOURCE_I2S1 0x100 +#define CRC_CLK_SOURCE_I2S2 0x104 +#define CRC_CLK_SOURCE_SPDIF_OUT 0x108 +#define CRC_CLK_SOURCE_SPDIF_IN 0x10c +#define CRC_CLK_SOURCE_PWM 0x110 +#define CRC_CLK_SOURCE_SPI 0x114 +#define CRC_CLK_SOURCE_SBC1 0x134 +#define CRC_CLK_SOURCE_SBC2 0x118 +#define CRC_CLK_SOURCE_SBC3 0x11c +#define CRC_CLK_SOURCE_SBC4 0x1b4 +#define CRC_CLK_SOURCE_XIO 0x120 +#define CRC_CLK_SOURCE_TWC 0x12c +#define CRC_CLK_SOURCE_IDE 0x144 +#define CRC_CLK_SOURCE_NDFLASH 0x160 +#define CRC_CLK_SOURCE_VFIR 0x168 +#define CRC_CLK_SOURCE_SDMMC1 0x150 +#define CRC_CLK_SOURCE_SDMMC2 0x154 +#define CRC_CLK_SOURCE_SDMMC3 0x1bc +#define CRC_CLK_SOURCE_SDMMC4 0x164 +#define CRC_CLK_SOURCE_CVE 0x140 +#define CRC_CLK_SOURCE_TVO 0x188 +#define CRC_CLK_SOURCE_TVDAC 0x194 +#define CRC_CLK_SOURCE_HDMI 0x18c +#define CRC_CLK_SOURCE_DISP1 0x138 +#define CRC_CLK_SOURCE_DISP2 0x13c +#define CRC_CLK_SOURCE_CSITE 0x1d4 +#define CRC_CLK_SOURCE_LA 0x1f8 +#define CRC_CLK_SOURCE_OWR 0x1cc +#define CRC_CLK_SOURCE_NOR 0x1d0 +#define CRC_CLK_SOURCE_MIPI 0x174 +#define CRC_CLK_SOURCE_I2C1 0x124 +#define CRC_CLK_SOURCE_I2C2 0x198 +#define CRC_CLK_SOURCE_I2C3 0x1b8 +#define CRC_CLK_SOURCE_DVC 0x128 +#define CRC_CLK_SOURCE_UARTA 0x178 +#define CRC_CLK_SOURCE_UARTB 0x17c +#define CRC_CLK_SOURCE_UARTC 0x1a0 +#define CRC_CLK_SOURCE_UARTD 0x1c0 +#define CRC_CLK_SOURCE_UARTE 0x1c4 +#define CRC_CLK_SOURCE_3D 0x158 +#define CRC_CLK_SOURCE_2D 0x15c +#define CRC_CLK_SOURCE_MPE 0x170 +#define CRC_CLK_SOURCE_EPP 0x16c +#define CRC_CLK_SOURCE_HOST1X 0x180 +#define CRC_CLK_SOURCE_VDE 0x1c8 +#define CRC_CLK_SOURCE_VI 0x148 +#define CRC_CLK_SOURCE_VI_SENSOR 0x1a8 +#define CRC_CLK_SOURCE_EMC 0x19c + #define CRC_RST_DEV_L_SET 0x300 #define CRC_RST_DEV_L_CACHE2 (1 << 31) #define CRC_RST_DEV_L_VCP (1 << 29) diff --git a/drivers/clk/tegra/Makefile b/drivers/clk/tegra/Makefile index be58c20..e614722 100644 --- a/drivers/clk/tegra/Makefile +++ b/drivers/clk/tegra/Makefile @@ -1,5 +1,6 @@ obj-y += clk.o obj-y += clk-divider.o +obj-y += clk-periph.o obj-y += clk-pll.o obj-y += clk-pll-out.o diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.c new file mode 100644 index 0000000..e969495 --- /dev/null +++ b/drivers/clk/tegra/clk-periph.c @@ -0,0 +1,202 @@ +/* + * Copyright (C) 2013 Lucas Stach + * + * Based on the Linux Tegra clock code + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include + +#include "clk.h" + +#define to_clk_periph(_hw) container_of(_hw, struct tegra_clk_periph, hw) + +static int clk_periph_get_parent(struct clk *hw) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + + return periph->mux->ops->get_parent(periph->mux); +} + +static int clk_periph_set_parent(struct clk *hw, u8 index) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + + return periph->mux->ops->set_parent(periph->mux, index); +} + +static unsigned long clk_periph_recalc_rate(struct clk *hw, + unsigned long parent_rate) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + + return periph->div->ops->recalc_rate(periph->div, parent_rate); +} + +static long clk_periph_round_rate(struct clk *hw, unsigned long rate, + unsigned long *prate) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + + return periph->div->ops->round_rate(periph->div, rate, prate); +} + +static int clk_periph_set_rate(struct clk *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + + return periph->div->ops->set_rate(periph->div, rate, parent_rate); +} + +static int clk_periph_is_enabled(struct clk *hw) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + + return periph->gate->ops->is_enabled(periph->gate); +} + +static int clk_periph_enable(struct clk *hw) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + u32 reg; + + reg = readl(periph->rst_reg); + reg |= (1 << periph->rst_shift); + writel(reg, periph->rst_reg); + + periph->gate->ops->enable(periph->gate); + + udelay(2); + + reg = readl(periph->rst_reg); + reg &= ~(1 << periph->rst_shift); + writel(reg, periph->rst_reg); + + return 0; +} + +static void clk_periph_disable(struct clk *hw) +{ + struct tegra_clk_periph *periph = to_clk_periph(hw); + u32 reg; + + reg = readl(periph->rst_reg); + reg |= (1 << periph->rst_shift); + writel(reg, periph->rst_reg); + + udelay(2); + + periph->gate->ops->disable(periph->gate); +} + +const struct clk_ops tegra_clk_periph_ops = { + .get_parent = clk_periph_get_parent, + .set_parent = clk_periph_set_parent, + .recalc_rate = clk_periph_recalc_rate, + .round_rate = clk_periph_round_rate, + .set_rate = clk_periph_set_rate, + .is_enabled = clk_periph_is_enabled, + .enable = clk_periph_enable, + .disable = clk_periph_disable, +}; + +const struct clk_ops tegra_clk_periph_nodiv_ops = { + .get_parent = clk_periph_get_parent, + .set_parent = clk_periph_set_parent, + .is_enabled = clk_periph_is_enabled, + .enable = clk_periph_enable, + .disable = clk_periph_disable, +}; + +struct clk *_tegra_clk_register_periph(const char *name, + const char **parent_names, int num_parents, + void __iomem *clk_base, u32 reg_offset, u8 id, u8 flags, + bool has_div) +{ + struct tegra_clk_periph *periph; + int ret; + + periph = kzalloc(sizeof(*periph), GFP_KERNEL); + if (!periph) { + pr_err("%s: could not allocate peripheral clk\n", + __func__); + goto out_periph; + } + + periph->mux = clk_mux_alloc(NULL, clk_base + reg_offset, 30, 2, + parent_names, num_parents); + if (!periph->mux) + goto out_mux; + + periph->gate = clk_gate_alloc(NULL, NULL, clk_base + 0x10 + + ((id >> 3) & 0xc), id & 0x1f); + if (!periph->gate) + goto out_gate; + + if (has_div) { + periph->div = tegra_clk_divider_alloc(NULL, NULL, clk_base + + reg_offset, 0, TEGRA_DIVIDER_ROUND_UP, 0, 8, 1); + if (!periph->div) + goto out_div; + } + + periph->hw.name = name; + periph->hw.ops = has_div ? &tegra_clk_periph_ops : + &tegra_clk_periph_nodiv_ops; + periph->hw.parent_names = parent_names; + periph->hw.num_parents = num_parents; + periph->flags = flags; + periph->rst_reg = clk_base + 0x4 + ((id >> 3) & 0xc); + periph->rst_shift = id & 0x1f; + + ret = clk_register(&periph->hw); + if (ret) + goto out_register; + + return &periph->hw; + +out_register: + tegra_clk_divider_free(periph->div); +out_div: + clk_gate_free(periph->gate); +out_gate: + clk_mux_free(periph->mux); +out_mux: + kfree(periph); +out_periph: + return NULL; +} + +struct clk *tegra_clk_register_periph_nodiv(const char *name, + const char **parent_names, int num_parents, + void __iomem *clk_base, u32 reg_offset, u8 id, u8 flags) +{ + return _tegra_clk_register_periph(name, parent_names, num_parents, + clk_base, reg_offset, id, flags, + false); +} + +struct clk *tegra_clk_register_periph(const char *name, + const char **parent_names, int num_parents, + void __iomem *clk_base, u32 reg_offset, u8 id, u8 flags) +{ + return _tegra_clk_register_periph(name, parent_names, num_parents, + clk_base, reg_offset, id, flags, + true); +} diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c index 5f668cb..e70f99a 100644 --- a/drivers/clk/tegra/clk-tegra20.c +++ b/drivers/clk/tegra/clk-tegra20.c @@ -275,6 +275,28 @@ static void tegra20_pll_init(void) TEGRA_PLL_HAS_CPCON, pll_u_freq_table); } +static const char *mux_pllpcm_clkm[] = {"pll_p", "pll_c", "pll_m", "clk_m"}; + +static void tegra20_periph_init(void) +{ + /* peripheral clocks without a divider */ + clks[uarta] = tegra_clk_register_periph_nodiv("uarta", mux_pllpcm_clkm, + ARRAY_SIZE(mux_pllpcm_clkm), car_base, + CRC_CLK_SOURCE_UARTA, uarta, TEGRA_PERIPH_ON_APB); + clks[uartb] = tegra_clk_register_periph_nodiv("uartb", mux_pllpcm_clkm, + ARRAY_SIZE(mux_pllpcm_clkm), car_base, + CRC_CLK_SOURCE_UARTB, uartb, TEGRA_PERIPH_ON_APB); + clks[uartc] = tegra_clk_register_periph_nodiv("uartc", mux_pllpcm_clkm, + ARRAY_SIZE(mux_pllpcm_clkm), car_base, + CRC_CLK_SOURCE_UARTC, uartc, TEGRA_PERIPH_ON_APB); + clks[uartd] = tegra_clk_register_periph_nodiv("uartd", mux_pllpcm_clkm, + ARRAY_SIZE(mux_pllpcm_clkm), car_base, + CRC_CLK_SOURCE_UARTD, uartd, TEGRA_PERIPH_ON_APB); + clks[uarte] = tegra_clk_register_periph_nodiv("uarte", mux_pllpcm_clkm, + ARRAY_SIZE(mux_pllpcm_clkm), car_base, + CRC_CLK_SOURCE_UARTE, uarte, TEGRA_PERIPH_ON_APB); +} + static struct tegra_clk_init_table init_table[] = { {pll_p, clk_max, 216000000, 1}, {pll_p_out1, clk_max, 28800000, 1}, @@ -283,6 +305,11 @@ static struct tegra_clk_init_table init_table[] = { {pll_p_out4, clk_max, 24000000, 1}, {pll_c, clk_max, 600000000, 1}, {pll_c_out1, clk_max, 120000000, 1}, + {uarta, pll_p, 0, 1}, + {uartb, pll_p, 0, 1}, + {uartc, pll_p, 0, 1}, + {uartd, pll_p, 0, 1}, + {uarte, pll_p, 0, 1}, {clk_max, clk_max, 0, 0}, /* sentinel */ }; @@ -294,6 +321,7 @@ static int tegra20_car_probe(struct device_d *dev) tegra20_osc_clk_init(); tegra20_pll_init(); + tegra20_periph_init(); tegra_init_from_table(init_table, clks, clk_max); diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index 2bc3698..9bb8f1c 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -115,6 +115,29 @@ struct clk *tegra_clk_register_pll_out(const char *name, const char *parent_name, void __iomem *reg, u8 shift, u8 divider_flags); +/* struct clk-periph - peripheral clock */ +struct tegra_clk_periph { + struct clk hw; + struct clk *gate; + struct clk *mux; + struct clk *div; + u8 flags; + u8 rst_shift; + void __iomem *rst_reg; +}; + +#define TEGRA_PERIPH_NO_RESET BIT(0) +#define TEGRA_PERIPH_MANUAL_RESET BIT(1) +#define TEGRA_PERIPH_ON_APB BIT(2) + +struct clk *tegra_clk_register_periph_nodiv(const char *name, + const char **parent_names, int num_parents, + void __iomem *clk_base, u32 reg_offset, u8 id, u8 flags); + +struct clk *tegra_clk_register_periph(const char *name, + const char **parent_names, int num_parents, + void __iomem *clk_base, u32 reg_offset, u8 id, u8 flags); + /* struct clk_init_table - clock initialization table */ struct tegra_clk_init_table { unsigned int clk_id; -- 1.8.3.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox