From mboxrd@z Thu Jan 1 00:00:00 1970 From: Domenico Andreoli Subject: [PATCH 4/6] ARM: bcm476x: Add stub clock driver Date: Sun, 07 Oct 2012 03:53:04 +0200 Message-ID: <20121007015407.154476821@gmail.com> References: <20121007015300.828366635@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline; filename=arm-bcm476x-add-stub-clock-driver.patch List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: Domenico Andreoli , devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org List-Id: devicetree@vger.kernel.org From: Domenico Andreoli This is the minimal clock support required for the boot, a more complete implementation will follow (shortly). Signed-off-by: Domenico Andreoli --- arch/arm/mach-bcm476x/bcm476x.c | 3 ++ drivers/clk/Makefile | 1 + drivers/clk/clk-bcm476x.c | 52 ++++++++++++++++++++++++++++++++++++++++ include/linux/clk/bcm476x.h | 22 +++++++++++++++++ 4 files changed, 78 insertions(+) create mode 100644 drivers/clk/clk-bcm476x.c create mode 100644 include/linux/clk/bcm476x.h Index: b/arch/arm/mach-bcm476x/bcm476x.c =================================================================== --- a/arch/arm/mach-bcm476x/bcm476x.c +++ b/arch/arm/mach-bcm476x/bcm476x.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -43,6 +44,8 @@ void __init bcm476x_init(void) { int ret; + bcm476x_init_clocks(); + ret = of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); if (ret) { pr_err("of_platform_populate failed: %d\n", ret); Index: b/drivers/clk/Makefile =================================================================== --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_COMMON_CLK) += clk.o clk-fi clk-mux.o clk-divider.o clk-fixed-factor.o # SoCs specific obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835.o +obj-$(CONFIG_ARCH_BCM476X) += clk-bcm476x.o obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o obj-$(CONFIG_ARCH_MXS) += mxs/ Index: b/drivers/clk/clk-bcm476x.c =================================================================== --- /dev/null +++ b/drivers/clk/clk-bcm476x.c @@ -0,0 +1,52 @@ +/* + * Broadcom BCM476x SoCs clocks + * + * Copyright (C) 2011-2012 Domenico Andreoli + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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. + */ + +#include +#include +#include +#include +#include + +/* + * These are fixed clocks (and device tree doesn't support clk!). + * + * They're probably not all root clocks and it may be possible to + * turn them on and off but until this is mapped out better it's + * the only way they can be used. + */ +DEFINE_CLK_FIXED_RATE(sys_pclk, CLK_IS_ROOT, 312000000, 0); +DEFINE_CLK_FIXED_RATE(apb_pclk, CLK_IS_ROOT, 156000000, 0); +DEFINE_CLK_FIXED_RATE(uart0_pclk, CLK_IS_ROOT, 78000000, 0); +DEFINE_CLK_FIXED_RATE(uart1_pclk, CLK_IS_ROOT, 78000000, 0); +DEFINE_CLK_FIXED_RATE(uart2_pclk, CLK_IS_ROOT, 78000000, 0); + +static struct clk_lookup lookups[] = { + { .con_id = "sys_pclk", .clk = &sys_pclk }, + { .con_id = "apb_pclk", .clk = &apb_pclk }, + { .dev_id = "c0000.uart0", .clk = &uart0_pclk }, + { .dev_id = "c1000.uart1", .clk = &uart1_pclk }, + { .dev_id = "b2000.uart2", .clk = &uart2_pclk }, +}; + +void __init bcm476x_init_clocks(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(lookups); i++) { + __clk_init(NULL, lookups[i].clk); + clkdev_add(&lookups[i]); + } +} Index: b/include/linux/clk/bcm476x.h =================================================================== --- /dev/null +++ b/include/linux/clk/bcm476x.h @@ -0,0 +1,22 @@ +/* + * Broadcom BCM476x SoCs clocks + * + * Copyright (C) 2011-2012 Domenico Andreoli + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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. + */ + +#ifndef __LINUX_CLK_BCM476X_H_ +#define __LINUX_CLK_BCM476X_H_ + +void __init bcm476x_init_clocks(void); + +#endif