From patchwork Fri May 23 15:22:13 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Figa X-Patchwork-Id: 4233691 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 85FCA9F1CD for ; Fri, 23 May 2014 15:26:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4DF3420138 for ; Fri, 23 May 2014 15:26:05 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AC6C720222 for ; Fri, 23 May 2014 15:26:03 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WnrKG-0004nZ-2h; Fri, 23 May 2014 15:24:04 +0000 Received: from mailout3.w1.samsung.com ([210.118.77.13]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WnrJ2-0003yC-Pp for linux-arm-kernel@lists.infradead.org; Fri, 23 May 2014 15:22:50 +0000 Received: from eucpsbgm1.samsung.com (unknown [203.254.199.244]) by mailout3.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N61008DK9DA6150@mailout3.w1.samsung.com> for linux-arm-kernel@lists.infradead.org; Fri, 23 May 2014 16:22:22 +0100 (BST) X-AuditID: cbfec7f4-b7fac6d000006cfe-44-537f67ae1aa7 Received: from eusync3.samsung.com ( [203.254.199.213]) by eucpsbgm1.samsung.com (EUCPMTA) with SMTP id B7.00.27902.EA76F735; Fri, 23 May 2014 16:22:22 +0100 (BST) Received: from AMDC1227.digital.local ([106.116.147.199]) by eusync3.samsung.com (Oracle Communications Messaging Server 7u4-23.01(7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTPA id <0N61001CF9D67U90@eusync3.samsung.com>; Fri, 23 May 2014 16:22:22 +0100 (BST) From: Tomasz Figa To: linux-samsung-soc@vger.kernel.org Subject: [PATCH v2] cpufreq: exynos: Fix driver compilation with ARCH_MULTIPLATFORM Date: Fri, 23 May 2014 17:22:13 +0200 Message-id: <1400858533-4327-1-git-send-email-t.figa@samsung.com> X-Mailer: git-send-email 1.9.3 In-reply-to: <1400670752-673-1-git-send-email-t.figa@samsung.com> References: <1400670752-673-1-git-send-email-t.figa@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpkluLIzCtJLcpLzFFi42I5/e/4Vd116fXBBo+OS1r8nXSM3WLjjPWs Fr0LrrJZbHp8jdVixvl9TBZnTl9itTj5p5fRYv2M1ywWG796OHB6/P41idHjzrU9bB6bl9R7 bLnazuLRt2UVo8fnTXIBbFFcNimpOZllqUX6dglcGR2Hr7MXLCqo6Nok0sDYEtvFyMkhIWAi 8b+7kR3CFpO4cG89WxcjF4eQwFJGibdHu9khnD4miT03p7GCVLEJqEl8bnjEBmKLCKhKfG5b AFbELHCMSeLnxmZmkISwQKjEzbe9QEUcHCxARR+3WYKEeQUcJS5NfcIKsU1OonfbG7ByTqD4 2u4trCDlQgIOEtM2Rk9g5F3AyLCKUTS1NLmgOCk911CvODG3uDQvXS85P3cTIyTYvuxgXHzM 6hCjAAejEg/vjtK6YCHWxLLiytxDjBIczEoivMV+9cFCvCmJlVWpRfnxRaU5qcWHGJk4OKUa GEWXLT/e+zKrzvh5+KPrOvXzBWYGvI0Uf8icfTbDTN7lWICThL2PqlCjeJ9gyJk5f+3/TV60 o0rvYZXz57bEFYWdd+rTLnQetDG4WvZ32pLLvbHRzSb1yvr+j26ayQap9FxzvTyh28mQc91a 9bbI0znG6ZfOTfgXsz3028b9Dgsf6s5yfz09VomlOCPRUIu5qDgRAM4jsOoUAgAA X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140523_082249_166202_59235D98 X-CRM114-Status: GOOD ( 18.19 ) X-Spam-Score: -5.7 (-----) Cc: Kukjin Kim , Arnd Bergmann , Bartlomiej Zolnierkiewicz , Sachin Kamat , Viresh Kumar , Tomasz Figa , "Rafael J. Wysocki" , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Currently Exynos cpufreq drivers rely on globally mapped clock controller registers to configure frequency of CPU cores. This is obviously wrong and will be removed in near future, but to enable support for multi-platform builds without introducing a regression it needs to be worked around. This patch hacks the code to look for clock controller node in device tree and map its registers using of_iomap(), instead of relying on global mapping, so dependencies on platform headers are removed and the driver can compile again with multiplatform support. Signed-off-by: Tomasz Figa Acked-by: Viresh Kumar --- drivers/cpufreq/Kconfig.arm | 6 ++--- drivers/cpufreq/exynos-cpufreq.c | 2 -- drivers/cpufreq/exynos-cpufreq.h | 30 ++++++++++++------------- drivers/cpufreq/exynos4210-cpufreq.c | 39 +++++++++++++++++++++++++++----- drivers/cpufreq/exynos4x12-cpufreq.c | 40 ++++++++++++++++++++++++++++----- drivers/cpufreq/exynos5250-cpufreq.c | 43 +++++++++++++++++++++++++++++------- 6 files changed, 119 insertions(+), 41 deletions(-) diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 6a7dd3e..36d20d0 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -31,7 +31,7 @@ config ARM_EXYNOS_CPUFREQ config ARM_EXYNOS4210_CPUFREQ bool "SAMSUNG EXYNOS4210" - depends on CPU_EXYNOS4210 && !ARCH_MULTIPLATFORM + depends on CPU_EXYNOS4210 default y select ARM_EXYNOS_CPUFREQ help @@ -42,7 +42,7 @@ config ARM_EXYNOS4210_CPUFREQ config ARM_EXYNOS4X12_CPUFREQ bool "SAMSUNG EXYNOS4x12" - depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM + depends on SOC_EXYNOS4212 || SOC_EXYNOS4412 default y select ARM_EXYNOS_CPUFREQ help @@ -53,7 +53,7 @@ config ARM_EXYNOS4X12_CPUFREQ config ARM_EXYNOS5250_CPUFREQ bool "SAMSUNG EXYNOS5250" - depends on SOC_EXYNOS5250 && !ARCH_MULTIPLATFORM + depends on SOC_EXYNOS5250 default y select ARM_EXYNOS_CPUFREQ help diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c index 7c2a096..1e0ec57 100644 --- a/drivers/cpufreq/exynos-cpufreq.c +++ b/drivers/cpufreq/exynos-cpufreq.c @@ -19,8 +19,6 @@ #include #include -#include - #include "exynos-cpufreq.h" static struct exynos_dvfs_info *exynos_info; diff --git a/drivers/cpufreq/exynos-cpufreq.h b/drivers/cpufreq/exynos-cpufreq.h index a28ee9d..8dfebac 100644 --- a/drivers/cpufreq/exynos-cpufreq.h +++ b/drivers/cpufreq/exynos-cpufreq.h @@ -50,6 +50,7 @@ struct exynos_dvfs_info { struct cpufreq_frequency_table *freq_table; void (*set_freq)(unsigned int, unsigned int); bool (*need_apll_change)(unsigned int, unsigned int); + void __iomem *cmu_regs; }; #ifdef CONFIG_ARM_EXYNOS4210_CPUFREQ @@ -77,24 +78,21 @@ static inline int exynos5250_cpufreq_init(struct exynos_dvfs_info *info) } #endif -#include -#include +#define EXYNOS4_CLKSRC_CPU 0x14200 +#define EXYNOS4_CLKMUX_STATCPU 0x14400 -#define EXYNOS4_CLKSRC_CPU (S5P_VA_CMU + 0x14200) -#define EXYNOS4_CLKMUX_STATCPU (S5P_VA_CMU + 0x14400) - -#define EXYNOS4_CLKDIV_CPU (S5P_VA_CMU + 0x14500) -#define EXYNOS4_CLKDIV_CPU1 (S5P_VA_CMU + 0x14504) -#define EXYNOS4_CLKDIV_STATCPU (S5P_VA_CMU + 0x14600) -#define EXYNOS4_CLKDIV_STATCPU1 (S5P_VA_CMU + 0x14604) +#define EXYNOS4_CLKDIV_CPU 0x14500 +#define EXYNOS4_CLKDIV_CPU1 0x14504 +#define EXYNOS4_CLKDIV_STATCPU 0x14600 +#define EXYNOS4_CLKDIV_STATCPU1 0x14604 #define EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT (16) #define EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK (0x7 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT) -#define EXYNOS5_APLL_LOCK (S5P_VA_CMU + 0x00000) -#define EXYNOS5_APLL_CON0 (S5P_VA_CMU + 0x00100) -#define EXYNOS5_CLKMUX_STATCPU (S5P_VA_CMU + 0x00400) -#define EXYNOS5_CLKDIV_CPU0 (S5P_VA_CMU + 0x00500) -#define EXYNOS5_CLKDIV_CPU1 (S5P_VA_CMU + 0x00504) -#define EXYNOS5_CLKDIV_STATCPU0 (S5P_VA_CMU + 0x00600) -#define EXYNOS5_CLKDIV_STATCPU1 (S5P_VA_CMU + 0x00604) +#define EXYNOS5_APLL_LOCK 0x00000 +#define EXYNOS5_APLL_CON0 0x00100 +#define EXYNOS5_CLKMUX_STATCPU 0x00400 +#define EXYNOS5_CLKDIV_CPU0 0x00500 +#define EXYNOS5_CLKDIV_CPU1 0x00504 +#define EXYNOS5_CLKDIV_STATCPU0 0x00600 +#define EXYNOS5_CLKDIV_STATCPU1 0x00604 diff --git a/drivers/cpufreq/exynos4210-cpufreq.c b/drivers/cpufreq/exynos4210-cpufreq.c index 6384e5b..61a5431 100644 --- a/drivers/cpufreq/exynos4210-cpufreq.c +++ b/drivers/cpufreq/exynos4210-cpufreq.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include "exynos-cpufreq.h" @@ -23,6 +25,7 @@ static struct clk *cpu_clk; static struct clk *moutcore; static struct clk *mout_mpll; static struct clk *mout_apll; +static struct exynos_dvfs_info *cpufreq; static unsigned int exynos4210_volt_table[] = { 1250000, 1150000, 1050000, 975000, 950000, @@ -60,20 +63,20 @@ static void exynos4210_set_clkdiv(unsigned int div_index) tmp = apll_freq_4210[div_index].clk_div_cpu0; - __raw_writel(tmp, EXYNOS4_CLKDIV_CPU); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU); do { - tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU); } while (tmp & 0x1111111); /* Change Divider - CPU1 */ tmp = apll_freq_4210[div_index].clk_div_cpu1; - __raw_writel(tmp, EXYNOS4_CLKDIV_CPU1); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU1); do { - tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU1); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU1); } while (tmp & 0x11); } @@ -85,7 +88,7 @@ static void exynos4210_set_apll(unsigned int index) clk_set_parent(moutcore, mout_mpll); do { - tmp = (__raw_readl(EXYNOS4_CLKMUX_STATCPU) + tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU) >> EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT); tmp &= 0x7; } while (tmp != 0x2); @@ -96,7 +99,7 @@ static void exynos4210_set_apll(unsigned int index) clk_set_parent(moutcore, mout_apll); do { - tmp = __raw_readl(EXYNOS4_CLKMUX_STATCPU); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU); tmp &= EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK; } while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT)); } @@ -115,8 +118,30 @@ static void exynos4210_set_frequency(unsigned int old_index, int exynos4210_cpufreq_init(struct exynos_dvfs_info *info) { + struct device_node *np; unsigned long rate; + /* + * HACK: This is a temporary workaround to get access to clock + * controller registers directly and remove static mappings and + * dependencies on platform headers. It is necessary to enable + * Exynos multi-platform support and will be removed together with + * this whole driver as soon as Exynos gets migrated to use + * cpufreq-cpu0 driver. + */ + np = of_find_compatible_node(NULL, NULL, "samsung,exynos4210-clock"); + if (!np) { + pr_err("%s: failed to find clock controller DT node\n", + __func__); + return -ENODEV; + } + + info->cmu_regs = of_iomap(np, 0); + if (!info->cmu_regs) { + pr_err("%s: failed to map CMU registers\n", __func__); + return -EFAULT; + } + cpu_clk = clk_get(NULL, "armclk"); if (IS_ERR(cpu_clk)) return PTR_ERR(cpu_clk); @@ -143,6 +168,8 @@ int exynos4210_cpufreq_init(struct exynos_dvfs_info *info) info->freq_table = exynos4210_freq_table; info->set_freq = exynos4210_set_frequency; + cpufreq = info; + return 0; err_mout_apll: diff --git a/drivers/cpufreq/exynos4x12-cpufreq.c b/drivers/cpufreq/exynos4x12-cpufreq.c index 63a3907..351a207 100644 --- a/drivers/cpufreq/exynos4x12-cpufreq.c +++ b/drivers/cpufreq/exynos4x12-cpufreq.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include "exynos-cpufreq.h" @@ -23,6 +25,7 @@ static struct clk *cpu_clk; static struct clk *moutcore; static struct clk *mout_mpll; static struct clk *mout_apll; +static struct exynos_dvfs_info *cpufreq; static unsigned int exynos4x12_volt_table[] = { 1350000, 1287500, 1250000, 1187500, 1137500, 1087500, 1037500, @@ -105,19 +108,20 @@ static void exynos4x12_set_clkdiv(unsigned int div_index) tmp = apll_freq_4x12[div_index].clk_div_cpu0; - __raw_writel(tmp, EXYNOS4_CLKDIV_CPU); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU); - while (__raw_readl(EXYNOS4_CLKDIV_STATCPU) & 0x11111111) + while (__raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU) + & 0x11111111) cpu_relax(); /* Change Divider - CPU1 */ tmp = apll_freq_4x12[div_index].clk_div_cpu1; - __raw_writel(tmp, EXYNOS4_CLKDIV_CPU1); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU1); do { cpu_relax(); - tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU1); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU1); } while (tmp != 0x0); } @@ -130,7 +134,7 @@ static void exynos4x12_set_apll(unsigned int index) do { cpu_relax(); - tmp = (__raw_readl(EXYNOS4_CLKMUX_STATCPU) + tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU) >> EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT); tmp &= 0x7; } while (tmp != 0x2); @@ -142,7 +146,7 @@ static void exynos4x12_set_apll(unsigned int index) do { cpu_relax(); - tmp = __raw_readl(EXYNOS4_CLKMUX_STATCPU); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU); tmp &= EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK; } while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT)); } @@ -161,8 +165,30 @@ static void exynos4x12_set_frequency(unsigned int old_index, int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info) { + struct device_node *np; unsigned long rate; + /* + * HACK: This is a temporary workaround to get access to clock + * controller registers directly and remove static mappings and + * dependencies on platform headers. It is necessary to enable + * Exynos multi-platform support and will be removed together with + * this whole driver as soon as Exynos gets migrated to use + * cpufreq-cpu0 driver. + */ + np = of_find_compatible_node(NULL, NULL, "samsung,exynos4412-clock"); + if (!np) { + pr_err("%s: failed to find clock controller DT node\n", + __func__); + return -ENODEV; + } + + info->cmu_regs = of_iomap(np, 0); + if (!info->cmu_regs) { + pr_err("%s: failed to map CMU registers\n", __func__); + return -EFAULT; + } + cpu_clk = clk_get(NULL, "armclk"); if (IS_ERR(cpu_clk)) return PTR_ERR(cpu_clk); @@ -194,6 +220,8 @@ int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info) info->freq_table = exynos4x12_freq_table; info->set_freq = exynos4x12_set_frequency; + cpufreq = info; + return 0; err_mout_apll: diff --git a/drivers/cpufreq/exynos5250-cpufreq.c b/drivers/cpufreq/exynos5250-cpufreq.c index 363a0b3..c91ce69 100644 --- a/drivers/cpufreq/exynos5250-cpufreq.c +++ b/drivers/cpufreq/exynos5250-cpufreq.c @@ -16,8 +16,8 @@ #include #include #include - -#include +#include +#include #include "exynos-cpufreq.h" @@ -25,6 +25,7 @@ static struct clk *cpu_clk; static struct clk *moutcore; static struct clk *mout_mpll; static struct clk *mout_apll; +static struct exynos_dvfs_info *cpufreq; static unsigned int exynos5250_volt_table[] = { 1300000, 1250000, 1225000, 1200000, 1150000, @@ -87,17 +88,18 @@ static void set_clkdiv(unsigned int div_index) tmp = apll_freq_5250[div_index].clk_div_cpu0; - __raw_writel(tmp, EXYNOS5_CLKDIV_CPU0); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS5_CLKDIV_CPU0); - while (__raw_readl(EXYNOS5_CLKDIV_STATCPU0) & 0x11111111) + while (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKDIV_STATCPU0) + & 0x11111111) cpu_relax(); /* Change Divider - CPU1 */ tmp = apll_freq_5250[div_index].clk_div_cpu1; - __raw_writel(tmp, EXYNOS5_CLKDIV_CPU1); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS5_CLKDIV_CPU1); - while (__raw_readl(EXYNOS5_CLKDIV_STATCPU1) & 0x11) + while (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKDIV_STATCPU1) & 0x11) cpu_relax(); } @@ -111,7 +113,8 @@ static void set_apll(unsigned int index) do { cpu_relax(); - tmp = (__raw_readl(EXYNOS5_CLKMUX_STATCPU) >> 16); + tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKMUX_STATCPU) + >> 16); tmp &= 0x7; } while (tmp != 0x2); @@ -122,7 +125,7 @@ static void set_apll(unsigned int index) do { cpu_relax(); - tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKMUX_STATCPU); tmp &= (0x7 << 16); } while (tmp != (0x1 << 16)); } @@ -141,8 +144,30 @@ static void exynos5250_set_frequency(unsigned int old_index, int exynos5250_cpufreq_init(struct exynos_dvfs_info *info) { + struct device_node *np; unsigned long rate; + /* + * HACK: This is a temporary workaround to get access to clock + * controller registers directly and remove static mappings and + * dependencies on platform headers. It is necessary to enable + * Exynos multi-platform support and will be removed together with + * this whole driver as soon as Exynos gets migrated to use + * cpufreq-cpu0 driver. + */ + np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-clock"); + if (!np) { + pr_err("%s: failed to find clock controller DT node\n", + __func__); + return -ENODEV; + } + + info->cmu_regs = of_iomap(np, 0); + if (!info->cmu_regs) { + pr_err("%s: failed to map CMU registers\n", __func__); + return -EFAULT; + } + cpu_clk = clk_get(NULL, "armclk"); if (IS_ERR(cpu_clk)) return PTR_ERR(cpu_clk); @@ -169,6 +194,8 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info) info->freq_table = exynos5250_freq_table; info->set_freq = exynos5250_set_frequency; + cpufreq = info; + return 0; err_mout_apll: