From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thara Gopinath Subject: [PATCH v3 6/6] OMAP4: Smartreflex framework extensions Date: Wed, 27 Oct 2010 21:46:36 +0530 Message-ID: <1288196196-15469-7-git-send-email-thara@ti.com> References: <1288196196-15469-1-git-send-email-thara@ti.com> Return-path: Received: from devils.ext.ti.com ([198.47.26.153]:38509 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756380Ab0J0QQq (ORCPT ); Wed, 27 Oct 2010 12:16:46 -0400 In-Reply-To: <1288196196-15469-1-git-send-email-thara@ti.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-omap@vger.kernel.org Cc: paul@pwsan.com, khilman@deeprootsystems.com, b-cousson@ti.com, vishwanath.bs@ti.com, sawant@ti.com, Thara Gopinath This patch extends the smartreflex framework to support OMAP4. The changes are minor like compiling smartreflex Kconfig option for OMAP4 also, and a couple of OMAP4 checks in the smartreflex framework. The change in sr_device.c where new logic has to be introduced for reading the efuse registers is due to the fact that in OMAP4 the efuse registers are 24 bit aligned. A __raw_readl will fail for non-32 bit aligned address and hence the 8-bit read and shift. Signed-off-by: Thara Gopinath --- arch/arm/mach-omap2/smartreflex.c | 8 ++++++-- arch/arm/mach-omap2/sr_device.c | 12 +++++++++++- arch/arm/plat-omap/Kconfig | 2 +- 3 files changed, 18 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c index 2669584..23e14c0 100644 --- a/arch/arm/mach-omap2/smartreflex.c +++ b/arch/arm/mach-omap2/smartreflex.c @@ -149,7 +149,11 @@ static void sr_set_clk_length(struct omap_sr *sr) struct clk *sys_ck; u32 sys_clk_speed; - sys_ck = clk_get(NULL, "sys_ck"); + if (cpu_is_omap34xx()) + sys_ck = clk_get(NULL, "sys_ck"); + else + sys_ck = clk_get(NULL, "sys_clkin_ck"); + if (IS_ERR(sys_ck)) { dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n", __func__); @@ -189,7 +193,7 @@ static void sr_set_regfields(struct omap_sr *sr) * file or pmic specific data structure. In that case these structure * fields will have to be populated using the pdata or pmic structure. */ - if (cpu_is_omap34xx()) { + if (cpu_is_omap34xx() || cpu_is_omap44xx()) { sr->err_weight = OMAP3430_SR_ERRWEIGHT; sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT; sr->accum_data = OMAP3430_SR_ACCUMDATA; diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c index b7e2d10..c157392 100644 --- a/arch/arm/mach-omap2/sr_device.c +++ b/arch/arm/mach-omap2/sr_device.c @@ -20,6 +20,7 @@ #include #include +#include #include #include @@ -101,7 +102,16 @@ static void __init sr_set_nvalues(struct omap_sr_dev_data *dev_data, } for (i = 0; i < dev_data->volts_supported; i++) { - u32 v = omap_ctrl_readl(dev_data->efuse_nvalues_offs[i]); + u32 v; + if (cpu_is_omap44xx()) { + u16 offset = dev_data->efuse_nvalues_offs[i]; + + v = omap_ctrl_readb(offset) | + omap_ctrl_readb(offset + 1) << 8 | + omap_ctrl_readb(offset + 2) << 16; + } else { + v = omap_ctrl_readl(dev_data->efuse_nvalues_offs[i]); + } dev_data->volt_data[i].sr_nvalue = v; } diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index 7ba92c2..afc6fed 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -37,7 +37,7 @@ config OMAP_DEBUG_LEDS config OMAP_SMARTREFLEX bool "SmartReflex support" - depends on ARCH_OMAP3 && PM + depends on (ARCH_OMAP3 || ARCH_OMAP4) && PM help Say Y if you want to enable SmartReflex. -- 1.7.0.4